Updated on 2024/10/02

Information

 

写真a

 
KOYAMA AKIHIKO
 
Organization
Faculty of Agriculture Department of Bioresource Sciences Assistant Professor
School of Agriculture Department of Bioresource and Bioenvironment(Concurrent)
Graduate School of Bioresource and Bioenvironmental Sciences Department of Bioresource Sciences(Concurrent)
Title
Assistant Professor
Contact information
メールアドレス
Profile
生物資源環境科学府附属水産実験所を拠点として、河口・沿岸域の底生生物・魚類等の保全に関する研究を行っています。
External link

Degree

  • Doctor of Agriculture

Research Interests・Research Keywords

  • Research theme: Assessment of ecological restoration in estuarine areas

    Keyword: Restoration, Monitoring, Environmental assessment, Adaptive management

    Research period: 2022.3

  • Research theme: Biodiversity conservation in estuarine areas

    Keyword: Estuary, Intertidal zone, Conservation/Restoration, Monitoring

    Research period: 2022.3

  • Research theme: Distribution and ecology of estuarine benthic animals

    Keyword: Benthos, Tidal flat, Salt marsh, Field survey

    Research period: 2022.3

Awards

  • 第1回廣瀬賞 研究奨励賞

    2024.9   応用生態工学  

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  • 平成28年度生物資源環境科学府賞

    2017.3   九州大学大学院生物資源環境科学府  

  • 最優秀ポスター賞

    2016.9   日本魚類学会  

  • 学生優秀発表賞

    2015.9   日本ベントス学会・日本プランクトン学会  

  • 優秀講演者賞

    2013.2   水環境学会九州支部会  

Papers

  • Sub-habitat classification of temperate salt marshes in Japan based on aquatic fauna Reviewed

    Akihiko Koyama , Takahiro Imai , Kota Matsushima , Satoshi Shimooka

    Global Ecology and Conservation   55   e03211   2024.11

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    Authorship:Lead author, Corresponding author  

    DOI: https://doi.org/10.1016/j.gecco.2024.e03211

    DOI: https://doi.org/10.1016/j.gecco.2024.e03211

  • Development and application of a second-generation multilingual tool for invasion risk screening of non-native terrestrial plants Reviewed

    Lorenzo Vilizzi, Marina Piria, Dariusz Pietraszewski, Daniela Giannetto, S. Luke Flory, Gábor Herczeg, Hayrünisa Baş Sermenli, Mihaela Britvec, Ilona Jukoniene, Lukas Petrulaitis, Ivana Vitasović-Kosić, David Almeida, Zainab Al-Wazzan, Rigers Bakiu, Angela Boggero, Ratcha Chaichana, Dimitriy Dashinov, Mahanama De Zoysa, Allan S. Gilles, Philippe Goulletquer, Elena Interesova, Oldřich Kopecký, Nicholas Koutsikos, Akihiko Koyama, Petra Kristan, Shan Li, Juliane Lukas, Seyed Daryoush Moghaddas, João G. Monteiro, Levan Mumladze, Chulhong Oh, Karin H. Olsson, Richard T. Pavia, Costas Perdikaris, Renanel Pickholtz, Cristina Preda, Milica Ristovska, Kristína Slovák Švolíková, Barbora Števove, Kieu Anh T. Ta, Eliza Uzunova, Leonidas Vardakas, Hugo Verreycken, Hui Wei, Baran Yoğurtçuoğlu, Árpád Ferincz, Lawrence R. Kirkendall, Lidia Marszał, Daniele Paganelli, Cvetanka Stojchevska, Ali Serhan Tarkan, Ayşe Yazlık

    Science of The Total Environment   917   170475   2024.3   ISSN:0048-9697 eISSN:1879-1026

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    Language:Others   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    Development and application of a second-generation multilingual tool for invasion risk screening of non-native terrestrial plants

    DOI: 10.1016/j.scitotenv.2024.170475

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  • Morphological allometry and life history including reproductive swarming of nereidid polychaete Tylorrhynchus osawai in a tidal river in Kyushu, Japan Reviewed

    Hinano Matsumoto, Akihiko Koyama, Satoshi Shimooka

    Marine Biology   171 ( 5 )   102   2024.3   ISSN:0025-3162 eISSN:1432-1793

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    Morphological allometry and life history including reproductive swarming of nereidid polychaete Tylorrhynchus osawai in a tidal river in Kyushu, Japan

    DOI: 10.1007/s00227-024-04423-4

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    Other Link: https://link.springer.com/article/10.1007/s00227-024-04423-4/fulltext.html

  • Sediment temperature characteristics and their relation to distribution patterns of two sentinel crab species in intertidal flats in western Japan Reviewed

    Akihiko Koyama, Ryutei Inui

    Scientific Reports   14 ( 1 )   861   2024.1   ISSN:2045-2322 eISSN:2045-2322

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    Sediment temperature characteristics and their relation to distribution patterns of two sentinel crab species in intertidal flats in western Japan
    Abstract

    In the context of global climate change, monitoring focused on temperature and benthic animals in intertidal flats and the development of metrics to assess climate change and ecosystem responses are essential for a sustainable society. However, few studies have assessed the relationship between intertidal sediment temperature and the distribution of benthic animals. To address this gap, in the present study, intertidal sediment temperatures were observed in 12 intertidal flats in 11 survey areas over 335 days, from October 2, 2019, to August 31, 2020, using water temperature data loggers. The characteristics of intertidal sediment temperatures were variable among the survey areas, and a correlation analysis suggested that such characteristics are possibly influenced by various spatial-scale factors, such as geographical, basin, and habitat scales. Furthermore, two sentinel crab species, Macrophthalmus japonicus and Macrophthalmus banzai were collected, and the number of wintering individuals of each species was estimated based on their carapace width to analyze the changes in abundances of the two species in each survey area. The results show that the number of days with daily minimum temperature ≥ 19 °C was the factor that influenced the abundance rate, suggesting that M. japonicus and M. banzai populations may decrease and increase, respectively, according to future climate change in Japan. Our findings emphasize the importance of long-term monitoring of sediment temperatures and benthic animals in intertidal flats to evaluate the influence of future climate change.

    DOI: 10.1038/s41598-024-51515-8

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    Other Link: https://www.nature.com/articles/s41598-024-51515-8

  • Spawning habitat suitability maps for the conservation of the tri‐spine horseshoe crab <scp><i>Tachypleus tridentatus</i></scp> in Tsuyazaki Cove, Fukuoka, Japan Reviewed

    Shinji Itaya, Akihiko Koyama, Mari Shuuno, Norio Onikura, Akira Tai, Shinichiro Yano

    Aquatic Conservation: Marine and Freshwater Ecosystems   33 ( 9 )   884 - 896   2023.9   ISSN:1052-7613 eISSN:1099-0755

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    Spawning habitat suitability maps for the conservation of the tri‐spine horseshoe crab <scp>Tachypleus tridentatus</scp> in Tsuyazaki Cove, Fukuoka, Japan
    Abstract

    The suitable spawning habitat of Tachypleus tridentatus was estimated and mapped for the first time using scientific modelling in Tsuyazaki, Fukuoka, Japan. A total of 43 nests were found at five sites from 2018 to 2019. Of these 43 nests, the location information of nine nests at one of the sites was used as ‘Training data’ for constructing the models.

    A series of procedures was employed to determine the relationship between the biological data and their physical parameters to estimate the suitable spawning habitat. First, the contribution rates of the physical parameters (beach elevation, slope and sediment) to nest locations were evaluated. Second, physical parameters that showed significant contribution rates were chosen to estimate suitable spawning habitats.

    It was found that the beach elevation was the most significant parameter for estimating suitable spawning habitats. Mean high water neap to mean higher high water was estimated as suitable spawning habitat, and 74% of the nests were fitted in an area assessed as suitable. The result was consistent with previous studies.

    The area of suitable spawning habitat was estimated to be only 476 m2 out of 1943 m2, comprising 24% of the sandy beach in the study site. Therefore, it was concluded that the conservation and restoration of spawning grounds is a high‐priority and urgent issue at the site.

    It is proposed that scientific modelling of nest/egg occurrence and beach elevation can effectively determine suitable spawning habitats. Thus, it is possible to quickly establish the habitat most suitable for spawning in coastal environments and help plan conservation strategies for this globally endangered species.

    DOI: 10.1002/aqc.3977

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  • Groundwater salinity and spatial distribution of reed marshes in intertidal zones of the Tsuyazaki Inlet. Reviewed

    KOYAMA Akihiko, ONIKURA Norio

    Ecology and Civil Engineering   26 ( 1 )   1 - 14   2023.9   ISSN:13443755 eISSN:18825974

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    Groundwater salinity and spatial distribution of reed marshes in intertidal zones of the Tsuyazaki Inlet

    DOI: 10.3825/ece.23-00003

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  • First record and habitat of <i>Bembidion nakamurai</i> (Morita, 2008) (Coleoptera: Carabidae) from the Kuma River, Kumamoto Prefecture, Japan Reviewed

    Hirata Wataru, Nakajima Jun, Koyama Akihiko, Inui Ryutei

    Izunuma-Uchinuma Wetland Researches   17 ( 0 )   17 - 22   2023.7   ISSN:18819559 eISSN:24242101

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    Language:Japanese   Publisher:The Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation  

    First record and habitat of Bembidion nakamurai (Morita, 2008) (Coleoptera: Carabidae) from the Kuma River, Kumamoto Prefecture, Japan
    The second location where Bembidion nakamurai was discovered and recorded in Kumamoto Prefecture. B. nakamurai had previously been known from only one location in Kagoshima Prefecture. Habitats of B. nakamurai in both localities were investigated and the environmental characteristics of their habitat were also noted.

    DOI: 10.20745/izu.17.0_17

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  • An artificially excavated wand-pool continues to be habitats of <i>Gymnogobius scrobiculatus</i> in an estuarine area of the Kitagawa River, Miyazaki Prefecture

    Onikura Norio, Koyama Akihiko

    Japanese Journal of Ichthyology   70 ( 1 )   n/a - 138   2023.4   ISSN:00215090 eISSN:18847374

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    Language:Japanese   Publisher:The Ichthyological Society of Japan  

    DOI: 10.11369/jji.22-030

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  • 宮崎県の河口域で採取されたオサガニ科甲殻類ヨミノオサガニEuplax leptophthalmus Reviewed

    小山彰彦, 乾 隆帝, 和田恵次

    日本生物地理学会会報   77   63 - 66   2022.12

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  • DEVELOPMENT OF A SEDIMENT PARTICLE SIZE PREDICTION METHOD FOR TIDAL FLAT BASED ON IMAGE ANALYSIS USING DEEP LEARNING Reviewed

    ONAKA Nozomu, AKAMATSU Yoshihisa, KOYAMA Akihiko, INUI Ryutei, SAITO Minoru, MABU Shingo

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)   78 ( 2 )   I_1117 - I_1122   2022.11   eISSN:2185467X

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Civil Engineers  

    DEVELOPMENT OF A SEDIMENT PARTICLE SIZE PREDICTION METHOD FOR TIDAL FLAT BASED ON IMAGE ANALYSIS USING DEEP LEARNING
    Our study aimed to develop a simple particle size estimation method for tidal flats and to verify its applicability for sediment classification of tidal flats. We conducted 1) the survey of the particle size distribution of tidal flats and photographing of the surface layer at 51 points located at the mouth of the Saba River in Yamaguchi Prefecture and 2) the estimation of the particle size by image analysis using machine learning from the surface photographs. The results showed that the tidal flat surfaces with mud content of less than 20&#37; and those with mud content of 20&#37; or greater could be discriminated from the images with an accuracy of approximately 73&#37;. Next, tidal flat images were classified into four categories of mud contents using machine learning; less than 15&#37;, 15&#37; to 25&#37;, 25&#37; to 35&#37;, and 35&#37; or more. The percentages of correct images in each category were 72&#37;, 48&#37;, 45&#37;, and 75&#37;, respectively. These results suggest that the machine learning image analysis used in this study can improve the accuracy of the discrimination when the partition of the mud content is set to be coarser.

    DOI: 10.2208/jscejhe.78.2_i_1117

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  • Development and application of a multilingual electronic decision-support tool for risk screening non-native terrestrial animals under current and future climate conditions Reviewed

    Lorenzo Vilizzi, Marina Piria, Dariusz Pietraszewski, Oldřich Kopecký, Ivan Špelić, Tena Radočaj, Nikica Šprem, Kieu Anh T. Ta, Ali Serhan Tarkan, András Weiperth, Baran Yoğurtçuoğlu, Onur Candan, Gábor Herczeg, Nurçin Killi, Darija Lemić, Bettina Szajbert, David Almeida, Zainab Al-Wazzan, Usman Atique, Rigers Bakiu, Ratcha Chaichana, Dimitriy Dashinov, Árpad Ferincz, Guillaume Flieller, Allan S. Gilles Jr, Philippe Goulletquer, Elena Interesova, Sonia Iqbal, Akihiko Koyama, Petra Kristan, Shan Li, Juliane Lukas, Seyed Daryoush Moghaddas, João G. Monteiro, Levan Mumladze, Karin H. Olsson, Daniele Paganelli, Costas Perdikaris, Renanel Pickholtz, Cristina Preda, Milica Ristovska, Kristína Slovák Švolíková, Barbora Števove, Eliza Uzunova, Leonidas Vardakas, Hugo Verreycken, Hui Wei, Grzegorz Zięba

    NeoBiota   76   211 - 236   2022.10   ISSN:1619-0033 eISSN:1314-2488

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    Electronic decision-support tools are becoming an essential component of government strategies to tackle non-native species invasions. This study describes the development and application of a multilingual electronic decision-support tool for screening terrestrial animals under current and future climate conditions: the Terrestrial Animal Species Invasiveness Screening Kit (TAS-ISK). As an adaptation of the widely employed Aquatic Species Invasiveness Screening Kit (AS-ISK), the TAS-ISK question template inherits from the original Weed Risk Assessment (WRA) and related WRA-type toolkits and complies with the ‘minimum requirements’ for use with the recent European Regulation on invasive alien species of concern. The TAS-ISK consists of 49 basic questions on the species’ biogeographical/historical traits and its biological/ecological interactions, and of 6 additional questions to predict how climate change is likely to influence the risks of introduction, establishment, dispersal and impact of the screened species. Following a description of the main features of this decision-support tool as a turnkey software application and of its graphical user interface with support for 32 languages, sample screenings are provided in different risk assessment areas for one representative species of each of the main taxonomic groups of terrestrial animals supported by the toolkit: mammals, birds, reptiles, amphibians, annelids, insects, molluscs, nematodes, and platyhelminths. The highest-scoring species were the red earthworm Lumbricus rubellus for the Aegean region of Turkey and the New Zealand flatworm Arthurdendyus triangulatus for Croatia. It is anticipated that adoption of this toolkit will mirror that of the worldwide employed AS-ISK, hence allowing to share information and inform decisions for the prevention of entry and/or dispersal of (high-risk) non-native terrestrial animal species – a crucial step to implement early-stage control and eradication measures as part of rapid-response strategies to counteract biological invasions.

    DOI: 10.3897/neobiota.76.84268

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  • Selection of river mouth for waterbird habitat conservation in Japan through a complementarity analysis and gap analysis of existing wildlife protection areas using the National Censuses on River Environments data Reviewed

    Atsushi Tanabe, Akihiko Koyama, Tomoko Minagawa

    Biogeography   24   9 - 24   2022.9

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    Selection of river mouth for waterbird habitat conservation in Japan through a complementarity analysis and gap analysis of existing wildlife protection areas using the National Censuses on River Environments data

    DOI: 10.11358/biogeo.24.9

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  • Assessment of spawning events of the tri-spine horseshoe crab, Tachypleus tridentatus, using environmental DNA in the Sone tidal flat, Japan Reviewed

    Akihiko Koyama, Yuki Kawahara, Yoshihisa Kurita, Taiga Hirata, Osamu Hayashi, Shungo Takahashi, Haruka Kubozono, Norio Onikura, Tomoko Minagawa

    Plankton and Benthos Research   17 ( 2 )   127 - 136   2022.5   ISSN:18808247 eISSN:1882627X

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    Language:Others   Publishing type:Research paper (scientific journal)   Publisher:The Plankton Society of Japan, The Japanese Association of Benthology  

    Assessment of spawning events of the tri-spine horseshoe crab, Tachypleus tridentatus, using environmental DNA in the Sone tidal flat, Japan

    DOI: 10.3800/pbr.17.127

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  • Embryonic, larval, and juvenile development of reared Cobitis striata fuchigamii (Cypriniformes: Cobitidae)

    Kanna Nagae, Akihiko Koyama, Norio Onikura

    Ichthyological Research   70 ( 1 )   123 - 131   2022.4   ISSN:1341-8998 eISSN:1616-3915

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    In this study, the early development of Cobitis striata fuchigamii was described using aquarium-spawned eggs and juveniles. Egg yolk diameter after water absorption was 1.0‒1.1 mm, and the spherical, demersal eggs had a light-yellow yolk, no oil droplets, and low viscosity. Newly hatched larvae [4.0–4.5 mm in total length (TL)] had 44‒45 (27‒28 + 17‒18) myomeres (26‒27 between the pectoral fins and the middle of the anus), two pairs of short tubular outer gill filaments on the cheek, and only a few melanophores on parts of the eye. Notochord flexion began at 5.1–6.8 mm TL and ended at 10.0 mm TL. The number of fin rays on each fin was finalized at approximately 25.0 mm TL. Lateral line spots of the larvae were indistinct, and juveniles formed blotches at approximately 25.0 mm TL. The barbels were formed in the following order: third, second, and then first. The formation of membranous fins occurred in the following order: pectoral, caudal, dorsal, anal, and then pelvic; full fin ray complements occurred in the caudal, dorsal, anal, pectoral, and pelvic regions. Some individuals (5.1–7.5 mm TL at the flexion stage) had free lateral neuromasts on the caudal region, each with a short cupula.

    DOI: 10.1007/s10228-022-00869-y

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  • Temporal changes in benthos at intertidal zones' communities in the Kuma River system: ecological monitoring before, during, and after the Arase dam removal Reviewed

    KOYAMA Akihiko, INUI Ryutei, IYOOKA Hiroki, MINAGAWA Tomoko, OHTSUKI Kazuaki, ONIKURA Norio

    Ecology and Civil Engineering   24 ( 2 )   191 - 216   2022.3   ISSN:13443755 eISSN:18825974

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    Temporal changes in benthos at intertidal zones' communities in the Kuma River system: ecological monitoring before, during, and after the Arase dam removal
    Few studies have investigated the response of estuarine ecosystems to high dam removal with embankment heights exceeding 15 m. Focusing on the Arase dam removal project in the Kuma River system, we surveyed the intertidal zones in the Kuma and Mae River estuaries between 2011 (before the removal) and 2018 (after the removal) to assess the changes in sediment conditions and benthic fauna. A total of 14 surveys were conducted in the fall and spring, with a total of 178 sites, of which 138 sites were used for the analysis. Coarse-graining was observed in the spring of 2012 and 2014, which may have been associated with the permanent gate opening of the Arase Dam in 2010 and the flush in 2011. The results of the benthos community analysis indicated that the changes in the fauna at each site were not based on the specific survey period or season. Therefore, it is possible that the dam removal had no significant impact on the estuarine benthic community. However, the number of infaunal species in both estuaries increased from the fall of 2012 to approximately 2014. During the same period, the occurrence of the mud and ghost shrimps increased, as were the number of symbiotic species that inhabit these shrimp burrows. The coarse-graining of the sediment in the intertidal zones may have expanded the habitat of these species, which are commonly found at sand and sandy mud flats. Since the relationship between the observed changes in the benthos community and the Arase Dam removal has not been fully verified, the dynamics of sediment transportation during the removal should be further evaluated.

    DOI: 10.3825/ece.21-00026

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  • Differences in conservation candidate tidal rivers by cross‐taxon analysis in the Japanese temperate zone Reviewed

    Akihiko Koyama, Ryutei Inui, Kazuki Kanno, Katsuhisa Eguchi, Atsushi Tanabe, Jun Nakajima, Norio Onikura, Tomoko Minagawa

    Aquatic Conservation: Marine and Freshwater Ecosystems   30 ( 12 )   2313 - 2326   2020.12

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    Differences in conservation candidate tidal rivers by cross‐taxon analysis in the Japanese temperate zone
    For effective biodiversity conservation, verifying the correspondence of conservation sites among taxa and identifying the environmental characteristics of these sites are essential; however, only a few such studies have been performed in estuaries. The aim of the present study was to verify the surrogacy of estuarine gobies and crabs, to identify tidal rivers of high conservation priority, and to describe their environmental characteristics. Distribution data for gobies and crabs were collected from 158 tidal rivers in the Kyushu region, Japan. Three conservation scenarios were analysed based on the distribution data of gobies alone, of crabs alone, and of both taxa, in order to assess the correspondence of the conservation candidates (i.e. tidal rivers) between taxa. The degree of correspondence was poor for the candidates selected on the basis of the distribution data of gobies or crabs separately. More efficient candidates were selected based on the data for both taxa. The environmental characteristics of tidal rivers with high irreplaceability for conservation differed between the taxa. Tidal rivers forming and maintaining large tidal flats covered with fine sediment might have high irreplaceability for goby conservation, whereas rivers with saltmarshes connected to supratidal and intertidal zones might have high irreplaceability for crab conservation. Tidal rivers with a high priority for conservation were identified by overlapping the candidates for three scenarios. These tidal rivers are not necessarily large, but have steep basins with river mouths that are less exposed to ocean waves. Moreover, the percentage of artificial areas in these rivers was low, suggesting that these rivers have not been exposed to excessive anthropogenic disturbance that leads to loss of estuarine habitat. These results show that gobies and crabs are not surrogates for one another. 1.2.3.4.5.

    DOI: 10.1002/aqc.3377

  • Habitat suitability maps for juvenile tri-spine horseshoe crabs in Japanese intertidal zones: A model approach using unmanned aerial vehicles and the Structure from Motion technique Reviewed

    Akihiko Koyama, Taiga Hirata, Yuki Kawahara, Hiroki Iyooka, Haruka Kubozono, Norio Onikura, Shinji Itaya, Tomoko Minagawa

    PLOS ONE   15 ( 12 )   e0244494 - e0244494   2020.12

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    Habitat suitability maps for juvenile tri-spine horseshoe crabs in Japanese intertidal zones: A model approach using unmanned aerial vehicles and the Structure from Motion technique
    The tri-spine horseshoe crab, <italic>Tachypleus tridentatus</italic>, is a threatened species that inhabits coastal areas from South to East Asia. A Conservation management system is urgently required for managing its nursery habitats, i.e., intertidal flats, especially in Japan. Habitat suitability maps are useful in drafting conservation plans; however, they have rarely been prepared for juvenile <italic>T</italic>. <italic>tridentatus</italic>. In this study, we examined the possibility of constructing robust habitat suitability models (HSMs) for juveniles based on topographical data acquired using unmanned aerial vehicles and the Structure from Motion (UAV-SfM) technique. The distribution data of the juveniles in the Tsuyazaki and Imazu intertidal flats from 2017 to 2019 were determined. The data were divided into a training dataset for HSM construction and three test datasets for model evaluation. High accuracy digital surface models were built for each region using the UAV-SfM technique. Normalized elevation was assessed by converting the topographical models that consider the tidal range in each region, and the slope was calculated based on these models. Using the training data, HSMs of the juveniles were constructed with normalized elevation and slope as the predictor variables. The HSMs were evaluated using the test data. The results showed that HSMs exhibited acceptable discrimination performance for each region. Habitat suitability maps were built for the juveniles in each region, and the suitable areas were estimated to be approximately 6.1 ha of the total 19.5 ha in Tuyazaki, and 3.7 ha of the total 7.9 ha area in Imazu. In conclusion, our findings support the usefulness of the UAV-SfM technique in constructing HSMs for juvenile <italic>T</italic>. <italic>tridentatus</italic>. The monitoring of suitable habitat areas for the juveniles using the UAV-SfM technique is expected to reduce survey costs, as it can be conducted with fewer investigators over vast intertidal zones within a short period of time.

    DOI: 10.1371/journal.pone.0244494

  • Habitat Characterization Based on Crab Fauna in the Temperate Estuarine Intertidal Zone of the Seto Inland Sea, Japan Reviewed

    Akihiko Koyama, Ryutei Inui, Norio Onikura, Yoshihisa Akamatsu, Tomoko Minagawa

    Estuaries and Coasts   43 ( 6 )   1533 - 1544   2020.9

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    DOI: 10.1007/s12237-020-00725-0

  • AI画像解析による汽水性希少ハゼ類の生息状況の予測手法の開発 Reviewed

    赤松良久, 間普真吾, 大中 臨, 乾 隆帝, 小山彰彦, 鬼倉徳雄

    河川技術論文集   26   373 - 378   2020.6

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    DEVELOPMENT OF PREDICTION METHOD FOR HABITAT OF BRACKISHWATER RARE GOBIES USING AI IMAGE ANALYSIS
    It is necessary to develop an efficient habitat survey method that does not depend on the surveyor's ability to collect organisms in the tidal flats. We have developed a method to predict the habitat status of goby fishes inhabiting tidal flats by using image analysis, which is one of the specialties of convolutional neural networks, a type of deep learning. The percentage of correct answers for the three species of goby species was relatively high, ranging from 0.72 to 0.74 and the accuracy of identifying them as “absent” was extremely high, ranging from 0.81 to 0.94. This result indicates that AI image analysis makes a significant contribution to the efficiency of habitat surveys in tidal flats.

    DOI: 10.11532/river.26.0_373

  • 高梁川水系のカジカ種群の分布と遺伝的,形態的,生態的特徴 Reviewed

    菅野 一輝, 乾 隆帝, 白井 厚太朗, 鬼倉 徳雄, 小山 彰彦, 澤 海人, 若林 瑞希

    日本生物地理学会会報   74   25 - 31   2019.12

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  • 環境DNA分析を用いたイシガイの生息量評価に関する基礎研究 Reviewed

    皆川 朋子, 川浪 健太郎, 栗田 喜久, 小山 彰彦, 林 博徳

    土木学会論文集 B1(水工学)   75   I_403 - I_408   2019.11

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  • Physicochemical factors affecting goby fauna in the intertidal zones of temperate riverine estuaries of the Seto Inland Sea Reviewed

    Akihiko Koyama, Ryutei Inui, Yoshihisa Akamatsu, Norio Onikura

    Estuarine, Coastal and Shelf Science   219   24 - 32   2019.4

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    Physicochemical factors affecting goby fauna in the intertidal zones of temperate riverine estuaries of the Seto Inland Sea

    DOI: 10.1016/j.ecss.2019.01.010

  • 徳島県那賀川河口域のワンド部に造成された代償干潟におけるカニ類,ハゼ類相の変遷 Reviewed

    小山 彰彦, 乾 隆帝, 大田 直友, 東 和之, 梶本 泰司

    応用生態工学   21 ( 2 )   113 - 133   2019.1

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    Change of crab and goby fauna in the mitigation tidal flats in the Naka River estuary.
    In the mouth of the Naka River in Tokushima Prefecture, approximately 24% of the estuarine environment has been altered because of heightening of the embankment as a countermeasure for the earthquake and tsunami in 2012. Artificial tidal flats, aimed at conserving the habitat of endangered benthic species, were created for mitigation of negative impact due to the construction. To assess the effectiveness of the mitigation, we set nine survey sites in the area, and conducted monitoring the sites 10 times between 2013 and 2017. Thirty three species of crabs and 27 species of gobies were found in the surveys. All threatened and near threatened crabs and gobies found during the first survey were collected during the subsequent surveys as well, suggesting that the habitat of these species has not disappeared due to the construction. We confirmed a decrease in the mean mud content in most of the survey sites in winter 2015, due to a large flush in summer 2014. Contrarily, the mean mud content increased at the mitigation sites due to the introduction of silt dredged from a neighboring river after the large flush. Nine survey sites were analyzed separately in the high (four sites) and low compartments (five sites) according to the range of elevation. The results of the high compartment sites, including two mitigation sites, suggested that the sites had fauna similar to that of the reference sites, after about two and a half years from the construction. On the contrary, the results of the low compartment sites suggested that the sediment condition and fauna changed in most of the sites due to the large flush. However, the dredged silt was supplied around the mitigation sites. Therefore, the fauna similar to that of before the embankment construction was formed around the mitigation sites after its construction.

    DOI: 10.3825/ece.21.113

  • 九州地方を対象とした河川水温の経年変化に関する基礎的研究 Reviewed

    野田 洋二, 皆川 朋子, 一柳 英隆, 小山 彰彦

    土木学会論文集 B1(水工学)   74   I_79 - I_84   2018.11

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    STUDY ON CHANGING IN RIVER WATER TEMPERATURE IN KYUSHU REGION

  • 遠賀川河口部の多自然魚道で確認されたハゼ類と産卵巣 Reviewed

    小山 彰彦, 松永 誠弥, 川本 朋慶, 菅野 一輝, 澤 海人, 鬼倉 徳雄

    魚類学雑誌   65   191 - 197   2018.11

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    Spawning nests of six goby species in a newly-established fish-way on the Onga River estuary barrage

  • 河川水辺の国勢調査を用いた河口域に飛来する鳥類群集の類型化と飛来要因の評価 Reviewed

    田辺 篤志, 皆川 朋子, 小山 彰彦

    土木学会論文集 B1(水工学)   74   I_565 - I_570   2018.11

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    CLASSIFICATION AND EVALUATION OF FACTORS OF AVIAN COMMUNITIES IN ESTUARY AREA USING NATIONAL SURVEY ON RIVER ENVIRONMENTS

  • First record of the brachiopod Lingula reevii (Brachiopoda, Lingulidae) from the Sea of Japan Reviewed

    Kazuki Kanno, Akihiko Koyama, Yoshihisa Kurita

    Biogeography   20   128 - 130   2018.9

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    First record of the brachiopod Lingula reevii (Brachiopoda, Lingulidae) from the Sea of Japan

  • First record of the varunid crab Parapyxidognathus deianira from the coast of the Sea of Japan Reviewed

    Akihiko Koyama, Norio Onikura

    Biogeography   20   133 - 136   2018.9

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    First record of the varunid crab Parapyxidognathus deianira from the coast of the Sea of Japan

  • Morphological, distributional, and genetic characteristics of Cottus pollux in the Kyushu Island, Japan: indication of fluvial and amphidromous life histories within a single lineage Reviewed

    Kazuki Kanno, Norio Onikura, Yoshihisa Kurita, Akihiko Koyama, Jun Nakajima

    Ichthyological Research   65 ( 4 )   1 - 9   2018.6

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    We evaluated the morphological, distributional, and genetic characteristics of the freshwater sculpin, Cottus pollux, in Kyushu Island, Japan. Based on pectoral fin ray number, the sculpins inhabiting 30 rivers were divided into two types [modes 13 (M13) and 15 (M15)]. We evaluated four environmental parameters: length of main river (L-MR), average gradient of main river (G-MR), distance from sampling site to river mouth (D-SM), and gradient around sampling site (G-S), and compared the two types. L-MR, D-SM, and G-S were significantly larger for the rivers that contained M13 fish than for those containing M15 fish. M13 individuals were distributed in the upstream areas of large river systems, suggesting a fluvial life history, whereas M15 individuals were distributed in the downstream areas of small river systems, indicating an amphidromous life history. We conducted phylogenetic analysis based on mitochondrial 12S rRNA [788 base pair (bp)] and control regions (386 bp). Mitochondrial DNA analysis showed that both M13 and M15 groups were genetically of C. pollux middle-egg type (ME). Our findings proposed the hypothesis that C. pollux ME in Kyushu Island exhibits dimorphism in both morphological and distributional traits. Additionally, haplotype distribution indicated that the fluvial M13 populations had higher genetic specificity in each river in contrast to the existence of one genetic group of amphidromous M15 individuals in Kyushu Island.

    DOI: 10.1007/s10228-018-0637-4

  • Abiotic and biotic factors influence the habitat use of four species of Gymnogobius (Gobiidae) in riverine estuaries in the Seto Inland Sea Reviewed

    Ryutei Inui, Akihiko Koyama, Yoshihisa Akamatsu

    Ichthyological Research   65 ( 1 )   1 - 11   2018.1

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    Gobies that are phylogenetically related or coexist in the same marine and estuarine systems often exhibit abiotic and/or biotic habitat segregation. Thus, it is possible that species of Gymnogobius inhabiting the same riverine estuaries also exhibit abiotic and/or biotic habitat segregation. The goal of this study was to determine the differences in abiotic and biotic habitat use between these species by sampling goby and host shrimps, and by examining the physical environments of the rivers where these species are found. The surveys of goby and host shrimps were conducted in the estuaries of the Saba and Ibo rivers, which drain into the Seto Inland Sea, a body of water that separates three of the four main islands of Japan. We used hand nets and shovels to collect goby and host shrimps, and measured median sediment particle size, elevation, and salinity at each site. Generalized linear models (GLMs) were used to assess the preferences in abiotic and biotic habitat use by the goby species. Median particle size, salinity, and elevation were used as the abiotic environmental predictors, whereas the presence/absence of host shrimps were re-organized into four categories consisting of “Upogebia major” only, “Nihonotrypaea japonica” only, “Upogebia major &amp
    Nihonotrypaea japonica,” and “Upogebia yokoyai,” which were used as the biotic environmental predictors. The GLMs demonstrated that median particle size had the largest influence of the abiotic variables, with goby species segregating according to differences in sediments
    moreover, there was some evidence suggesting that the host and symbiont do not always correlate at the species level. Our results indicated that although there is some overlap in abiotic and biotic habitat use among the four species of Gymnogobius, the differences were broad enough to provide an explanatory mechanism as to how these species can coexist in the same river systems.

    DOI: 10.1007/s10228-017-0584-5

  • 種子島の河口域で採集された北限記録のフタハオサガニMacrophthalmus convexus Reviewed

    村瀬 敦宣, 小山 彰彦

    日本生物地理学会会報   72   250 - 252   2018.1

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    The northernmost record of a tidal flat crab, Macrophthalmus convexus (Crustacea: Decapoda), based on a specimen from an estuary of Tanega-shima island, southern Japan

  • 希少種ハシボソテッポウエビAlpheus dolichodactylusの九州における分布記録 Reviewed

    小山 彰彦, 乾 隆帝, 菅野 一輝, 鬼倉 徳雄

    日本生物地理学会会報   72   282 - 285   2018.1

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    Distributional records of a rare snapping shrimp Alpheus dolichodactylus in Kyushu, Japan

  • 山口県および九州北岸におけるマメアカイソガニの分布と生息環境 Reviewed

    小山 彰彦, 若林 瑞希, 乾 隆帝, 鬼倉 徳雄

    日本生物地理学会会報   72   242 - 246   2018.1

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    Record of a rare pebble-shore crab Cyclograpsus pumilio from Yamaguchi Prefecture to northern coast of Kyushu, Japan, with some notes on their habitat conditions

  • 奄美琉球におけるフナの生息状況と体色多型 Reviewed

    鹿野 雄一, 高田(遠藤, 未来美, 山下 奉海, 田中 亘, 小山 彰彦, 菅野 一輝

    魚類学雑誌   64 ( 2 )   95 - 105   2017.11

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    Distribution and color variations of Carassius auratus in the Amami-Ryukyu Islands, Japan

  • The first record of the spawning nest of Gymnogobius cylindricus and Gymnogobius macrognathos Reviewed

    Akihiko Koyama, Ryutei Inui, Keitaro Umemura, Mizuki Wakabayashi, Kazuki Kanno, Norio Onikura

    ICHTHYOLOGICAL RESEARCH   64 ( 2 )   261 - 263   2017.4

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    DOI: 10.1007/s10228-016-0548-1

  • 南西諸島におけるニホンウナギの生息状況と地方名から推測されるオオウナギとのハビタットの違い,および生息場としての水田環境の重要性 Reviewed

    鹿野 雄一, 山下 奉海, 田中 亘, 小山 彰彦, 菅野 一輝

    魚類学雑誌   64 ( 1 )   43 - 53   2017.4

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    Distribution of Anguilla japonica and A. marmorata in the Nansei Islands, Japan, and their habitat segregation based on local names

  • Symbiotic partner specificity and dependency of two gobies (Apocryptodon punctatus and Acentrogobius sp A) and four alpheid shrimps inhabiting the temperate estuary of southern Japan Reviewed

    Akihiko Koyama, Ryutei Inui, Kaito Sawa, Norio Onikura

    ICHTHYOLOGICAL RESEARCH   64 ( 1 )   131 - 138   2017.1

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    We collected two gobies, Apocryptodon punctatus and Acentrogobius sp. A, and four alpheid shrimps from an estuary in southern Japan, to identify the symbiotic shrimps with gobies and to understand their partner specificity and dependency. Analysis based on generalized linear models identified two specific partners for each goby. A. punctatus frequently coexisted with partners and showed similar habitats, suggesting that this goby might be an obligate mutualist. Acentrogobius sp. A had lower rates of coexistence and appeared in habitats different from one of its partners, suggesting that this goby might be a facultative mutualist.

    DOI: 10.1007/s10228-016-0535-6

  • 外来魚の影響を加味した希少魚保全のための重要地選定法:菊池川周辺流域のタナゴ類 Reviewed

    鬼倉 徳雄, 川本 朋慶, 澤 海人, 北川 裕一, 小山 彰彦, 大坪 寛征, 林 博徳, 皆川 朋子, 島谷 幸宏

    日本水産学会誌   82 ( 6 )   945 - 947   2016.11

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    Prioritization procedure for protecting native bitterling species with consideration for invasions by several alien species: A case study around the Kikuchi river basin, Kyushu Island, Japan

    DOI: 10.2331/suisan.16-00044

  • Habitat suitability of eight threatened gobies inhabiting tidal flats in temperate estuaries: model developments in the estuary of the Kuma River in Kyushu Island, Japan Reviewed

    Akihiko Koyama, Ryutei Inui, Hiroki Iyooka, Yoshihisa Akamatsu, Norio Onikura

    ICHTHYOLOGICAL RESEARCH   63 ( 2 )   307 - 314   2016.4

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    We developed habitat suitability models for eight threatened goby species inhabiting tidal flats in the estuary of Kuma River in Kyushu Island, Japan. The best models selected several environmental factors, which were supported by area under the curve (AUC) values ranging from 0.793 to 0.976. The habitat suitability curves for each variable demonstrated various slopes, suggesting interspecific differences in habitat suitability for each environmental factor. The results suggested that the range of environmental gradients in tidal flats influences the richness of the threatened goby species.

    DOI: 10.1007/s10228-015-0490-7

  • Molecular analysis of the distributions of the invasive Asian clam, Corbicula fluminea (O.F. Müller, 1774), and threatened native clam, C. leana Prime, 1867, on Kyushu Island, Japan Reviewed

    Takuya Okawa, Yoshihisa Kurita, Kazuki Kanno, Akihiko Koyama, Norio Onikura

    BioInvasions Records   5 ( 1 )   25 - 29   2016.3

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    The invasion of the Asian clam, Corbicula fluminea (O.F. Müller, 1774), has caused serious ecological and economic problems worldwide. In the Japanese archipelago, C. fluminea has been identified using morphological characteristics in most distribution surveys. However, a recent study has shown that morphology alone cannot be used to identify C. fluminea due to its superficial similarity to the related native species C. leana Prime, 1867. Consequently, the present distribution of C. fluminea is still poorly understood. We surveyed the distribution of C. fluminea on Kyushu Island, Japan, by sequencing the cytochrome b region of the mitochondrial DNA, a region that can be used to distinguish the two clam species, and found that C. fluminea was already established throughout the entire island, except at a single site where Corbicula clams comprised solely of C. leana. In response to this serious situation, we suggest using PCR-RFLP method, which was employed here, to distinguish the two clam species for more effective and rapid surveys.

    DOI: 10.3391/bir.2016.5.1.05

  • 希少種イドミミズハゼの生息環境と生息場の河床変動および塩分変動特性 Reviewed

    乾 隆帝, 赤松 良久, 新谷 哲也, 小山 彰彦

    土木学会論文集B1(水工学)   71 ( 4 )   I_949 - I_954   2015.1

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    RELATIONSHIPS BETWEEN HABITAT CHARACTERISTICS OF NEAR THREATENED GOBY Luciogobius pallidus AND RIVER-BED AND SALINITY FLUCTUATION

  • Potential distribution of Tridentiger barbatus (Gunther 1861) and Tridentiger nudicervicus (Tomiyama 1934) in the Seto Inland Sea, western Japan Reviewed

    Ryutei Inui, Shion Takemura, Akihiko Koyama, Norio Onikura, Mahito Kamada

    ICHTHYOLOGICAL RESEARCH   61 ( 1 )   83 - 89   2014.1

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    We developed distribution models for two near-threatened gobiid fishes, Tridentiger barbatus and Tridentiger nudicervicus, based on distribution data and geographic variables in the Ariake Sea, the Yatsushiro Sea, and Suonada Bay. Subsequently, we estimated the potential distribution of both species across all areas of the Seto Inland Sea based on the model predictions. The models indicated high accuracy and demonstrated that both species inhabit shoal and relatively enclosed waters. Predicted potential distribution areas of the two species included all sites with previous records and a few new sites without existing records.

    DOI: 10.1007/s10228-013-0370-y

  • 牛津川近隣の農業用水路におけるツチフキの産卵環境 Reviewed

    林 浩介, 小山 彰彦, 鬼倉 徳雄

    魚類学雑誌   60 ( 2 )   141 - 147   2013.11

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    Spawning habitat of the Chinese false gudgeon, Abbottina rivularis, in an irrigation channel near the Ushizu River, northern Kyushu Island, Japan

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Books

  • ダムと環境の科学IV 流砂環境再生

    小山彰彦, 鬼倉徳雄

    京都大学学術出版会  2023.10 

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  • 社会基盤と生態系保全の基礎と手法

    乾 隆帝, 小山彰彦, 伊豫岡宏樹

    朝倉書店  2022.4 

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  • Fish Diversity of Japan

    Akihiko Koyama

    Springer, Singapore  2022.1 

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    Fish Diversity of Japan

  • 日本の湿地 ―人と水と自然が織り成す世界―

    小山彰彦, 乾 隆帝

    朝倉書店  2017.6 

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Presentations

  • UAV-SfMをベースにした干潟底生生物の空間分布予測

    小山彰彦

    2021年日本プランクトン学会・日本ベントス学会・合同大会  2021.9 

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    Event date: 2022.9

    Language:Japanese  

    Country:Japan  

  • Environmental Characteristics of Candidate Riverine Estuaries for Conservation in Kyushu, Japan,

    Koyama A, Inui R, Onikura N, Minagawa T

    12th International Symposium on Ecohydraulics 2018,  2018.8 

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    Event date: 2018.8

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    Country:Other  

    Environmental Characteristics of Candidate Riverine Estuaries for Conservation in Kyushu, Japan,

  • Classification and Habitat Evaluation of Avian Communities in Japanese Estuaries

    Tanabe A, Minagawa T, Koyama A

    12th International Symposium on Ecohydraulics 2018  2018.8 

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    Event date: 2018.8

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    Classification and Habitat Evaluation of Avian Communities in Japanese Estuaries

  • UAV-SfMと環境DNAによるカブトガニのモニタリング技術構築の試み Invited

    小山彰彦

    先端技術を活用した干潟の生物生息場の把握(グローカル環境・防災学研究&環境DNA研究コンソーシアム講演会)  2022.3 

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    Country:Other  

  • Selection of estuaries for waterbird habitat conservation through complementarity analysis on class A river in Japan

    Atsushi Tanabe, Akihiko Koyama, Tomoko Minagawa

    9th Asian Wetland Symposium (AWS9)  2021.7 

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    Country:Other  

    Selection of estuaries for waterbird habitat conservation through complementarity analysis on class A river in Japan

  • Hybridization between Endangered Species in Natural Water Area of Northern Kyushu, Japan

    Umemura K, Koyama A, Onikura N

    2018 ICLEE 9th Conference  2018.11 

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    Hybridization between Endangered Species in Natural Water Area of Northern Kyushu, Japan

  • Hybridization between Endangered Bitterling Species in Natural Water Area

    Umemura K, Koyama A, Onikura N

    The 8th EAFES International Congress  2018.4 

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    Hybridization between Endangered Bitterling Species in Natural Water Area

  • Coastal and basin environmental influences on crab and goby fauna at riverine estuaries in Kyushu, Japan

    Koyama A, Inui R, Onikura N

    The Third Asian Marine Biology Symposium  2017.11 

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    Coastal and basin environmental influences on crab and goby fauna at riverine estuaries in Kyushu, Japan

  • Issues in Indonesia’s tsunami disaster management system revealed after the 2004 Sumatra event

    Sugimoto M, Koyama A, Sun H, Kang I, Arakawa T, Kobayashi J, Nagata M, Nakano M, Nakanishi R, Noguchi S

    AGU Fall Meeting 2014  2014.12 

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    Country:Other  

    Issues in Indonesia’s tsunami disaster management system revealed after the 2004 Sumatra event

  • The presence and absence relationship of the thalassinidean shrimp and the symbiotic benthos that use their burrows. -A study of how the physical environment affects symbiotic benthos in Kyushu, Japan-

    Koyama A, Inui R, Onikura N

    IAA & CSJ Joint International Conference on Crustacea  2014.9 

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    The presence and absence relationship of the thalassinidean shrimp and the symbiotic benthos that use their burrows. -A study of how the physical environment affects symbiotic benthos in Kyushu, Japan-

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MISC

  • 五ヶ瀬川水系北川の人工ワンドはクボハゼの生息場として持続的に機能している Reviewed

    鬼倉 徳雄, 小山 彰彦

    魚類学雑誌   2023.4

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    An artificially excavated wand-pool continues to be habitats of Gymnogobius scrobiculatus in an estuarine area of the Kitagawa River, Miyazaki Prefecture

    DOI: 10.11369/jji.22-030

  • 福岡県におけるゴマフエダイの標本に基づく初記録

    松島 宏太, 小山 彰彦, 中島 淳

    ニッチェ・ライフ   2022.10

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    First record of specimen of Lutjanus argentimaculatus from Fukuoka Prefecture, northern Kyushu, Japan

  • 平成 29 年 7 月九州北部豪雨による斜面における表層崩壊の要因分析 Reviewed

    浅田 寛喜, 皆川 朋子, 小山 彰彦, 一柳 英隆

    応用生態工学   2020.9

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    Factor analysis of surface collapse on slopes caused by the July 2017 Northern Kyushu Heavy Rain.

    DOI: 10.3825/ece.23.185

  • 耳川河口域における汽水性生物の生息適地モデル Reviewed

    鬼倉 徳雄, 伊豫岡 宏樹, 小山 彰彦, 乾 隆帝, 柏井 条介

    ダム技術 = Engineering for dams   2018.1

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  • 本州・四国・九州の河口干潟に生息するハゼ類 Reviewed

    乾 隆帝, 小山 彰彦

    魚類学雑誌   2014.11

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    Gobiid fishes inhabiting estuarine tidal flats in Honshu, Shikoku and Kyushu

    DOI: 10.11369/jji.61.105

Professional Memberships

  • THE CARCINOLOGICAL SOCIETY OF JAPAN

  • THE ICHTHYOLOGICAL SOCIETY OF JAPAN

  • THE BIOGEOGRAPHICAL SOCIETY OF JAPAN

  • Ecology and Civil Engineering Society

  • THE JAPANESE ASSOCIATION OF BENTHOLOGY

  • THE JAPANESE SOCIETY OF FISHERIES SCIENCE

  • THE ECOLOGICAL SOCIETY OF JAPAN

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Committee Memberships

  • 日本魚類学会   2024年度日本魚類学会優秀発表賞審査委員  

    2024.8 - 2024.9   

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  • 国土交通省九州地方整備局八代河川国道事務所   球磨川かわづくりデザイン検討会環境ワーキンググループ委員  

    2024.7 - Present   

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  • 日本魚類学会   2024年度日本魚類学会年会実行委員  

    2024.2 - Present   

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    Committee type:Academic society

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  • 古賀市   古賀市環境審議委員会  

    2023.3 - Present   

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    Committee type:Municipal

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  • 福岡県   福岡県希少野生生物保護検討会議魚類・甲殻類等分科会委員  

    2021.4 - Present   

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    Committee type:Municipal

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Research Projects

  • 感潮河川潮間帯における生物の面的モニタリングのための技術革新研究

    2022.4 - 2025.3

    Research commissions

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    Authorship:Coinvestigator(s)  Grant type:Other funds from industry-academia collaboration

  • 感潮河川潮間帯における生物の面的モニタリングのための技術革新研究

    2022.4 - 2025.3

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    Authorship:Coinvestigator(s) 

  • 河川汽水域に形成される高層塩性湿地の機能評価と管理手法の確立

    2022.4 - 2025.3

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    Authorship:Principal investigator 

  • 陸域・海域エコトーン部の地中浅所の緩衝水域:その形成条件特定と生態学的機能解明

    2022.3 - 2023.3

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    Authorship:Coinvestigator(s) 

  • 河川汽水域に形成される高層塩性湿地の機能評価と管理手法の確立

    Grant number:22K18053  2022 - 2024

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Early-Career Scientists

    小山 彰彦

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    Authorship:Principal investigator  Grant type:Scientific research funding

    本課題では福岡県の河口部を対象として,日本の環境保全・再生の観点から見逃されがちな「高層塩性湿地」に着眼した野外調査を展開する.まず,高層塩性湿地が存在する場と欠落している場の種多様性を比較し,本湿地景観がエコトーンとして機能していることを検証する.次に,塩性湿地の生物情報,および物理化学情報に基づき湿地を類型化することで,湿地タイプごとの特性を把握する.塩性湿地は多面的な生態系サービスを備えながら,近年の豪雨災害への対策のため,掘削による流下能力の確保が求められている.よって本課題は,優れた生態系サービスの譲受と,豪雨災害の回避・被害低減を両立するための重要な一手として期待される.

    CiNii Research

  • Buffer waters in shallow underground areas in terrestrial and marine ecotone areas: Identification of salinity conditions and ecological functions.

    Grant number:20K21337  2020 - 2022

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Challenging Research(Exploratory)

    Onikura Norio

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

    First, we explicitly identified stable salinity conditions of buffer waters in shallow underground areas at the boundary between land and sea. In both locations where the backlands were mountain forests and where the backlands were plains, the salinity of surface water fluctuated with the ebb and flow of the tide, whereas the pore water was stable at low salinity. Surface water salinity was influenced by tides and precipitation, while pore water salinity was not influenced by tides and was stable. Porewater on the mountain side was unaffected by not only tide bute also precipitation.
    The benthic fauna of the tidal flats differed between the mountain side and the plain side, with reeds growing on the mountain side, and the benthic species diversity was high. The low salinity of the pore water supports the growth of reeds, and as a result, it can be inferred that the species diversity is high due to the presence of organisms that depend on the reed zone.

    CiNii Research

  • 環境DNA分析とリモートセンシング技術を用いた希少種カブトガニの個体群推定

    Grant number:18K14482  2018 - 2020

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Early-Career Scientists

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 九州をモデルとした塩性湿地生態系の健全性評価および保全・再生手法の構築

    Grant number:18J00211  2018 - 2020

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for JSPS Fellows

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 荒瀬ダム撤去に着目した大規模土砂かく乱と干潟生態系の応答

    Grant number:16J06360  2016 - 2017

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for JSPS Fellows

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 九州における汽水性カニ類の種多様性に関わる流域特性の特定

    2014 - 2015

    公益財団法人 水産無脊椎動物研究所

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    Authorship:Principal investigator  Grant type:Contract research

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Class subject

  • 基礎生物学実験Ⅰ

    2023.10 - 2024.3   Second semester

  • 専門英語

    2023.10 - 2024.3   Second semester

  • 水圏生物資源環境学特論

    2023.10 - 2023.12   Fall quarter

  • 動物行動生態学I

    2023.10 - 2023.12   Fall quarter

  • アクアフィールド科学実習

    2023.4 - 2023.9   First semester

  • 水圏生態系の保全と再生

    2023.4 - 2023.9   First semester

  • 水産科学のフロンティア

    2023.4 - 2023.9   First semester

  • 動物行動生態学I

    2022.10 - 2022.12   Fall quarter

  • アクアフィールド科学実習

    2022.4 - 2022.9   First semester

  • 水圏生態系の保全と再生

    2022.4 - 2022.9   First semester

  • 水圏生物資源環境学特論

    2022.4 - 2022.9   First semester

  • 水産科学のフロンティア

    2022.4 - 2022.9   First semester

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FD Participation

  • 2022.4   Role:Participation   Title:令和4年度 第1回全学FD(新任教員の研修)

    Organizer:University-wide

Social Activities

  • 海洋科学セミナー

    Role(s):Lecturer

    福岡県立新宮高等学校  2024.8

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  • 海辺の生きもの観察会

    古賀市環境市民会議(ぐりんぐりん古賀)  2023.8

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 海洋科学セミナー

    福岡県立新宮高等学校  2023.8

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • カブトガニの産卵と環境DNA

    福津市文化協会  2023.3

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 津屋崎保育園見学会

    津屋崎保育園  2023.3

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • GIT講座

    福津市立津屋崎中学校  2022.11

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 干潟を歩く、干潟を掘る、干潟を撮る

    チーム国土を喰らふ  2022.11

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 干潟実習

    福岡工業大学附属 城東高等学校  2022.8

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 海辺の生きもの観察会

    古賀市環境市民会議(ぐりんぐりん古賀)  2022.8

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 海洋科学セミナー

    福岡県立新宮高等学校  2022.7

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 津屋崎干潟の絶滅危惧種カブトガニの保全

    福津市文化協会  2022.3

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 福津市で出会えるカニ類―主に海域を対象として―

    福津市文化協会  2021.3

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 福津市で出会えるカニ類―主に陸域を対象として―

    福津市文化協会  2020.4

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 菊池川にすむ魚たち

    菊池川自然塾  2019.8

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

  • 竹村紫苑・乾 隆帝(編)・小山彰彦(解説)・高里尚正(写真)・和田恵次(監修).億首川の自然ハンドブック2汽水域・マングローブ林内のカニ類

    金武町教育委員会  2016.3

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

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