Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Kusumoto Buntaro Last modified date:2022.06.01

Assistant Professor / Department of Agro-environmental Sciences / Faculty of Agriculture

1. Jamie M Kass, Nao Takashina, Nicholas R Friedman, Buntarou Kusumoto, Mary E Blair, Idea paper: Improving forecasts of community composition with lightweight biodiversity monitoring across ecological and anthropogenic disturbance gradients, ECOLOGICAL RESEARCH, 10.1111/1440-1703.12294, 2022.01, [URL].
2. Shiono T, Kusumoto B, Kubota Y, Area-based conservation planning in Japan: The importance of OECMs in the post-2020 Global Biodiversity Framework, GLOBAL ECOLOGY AND CONSERVATION, 10.1016/j.gecco.2021.e01783, 30, 2021.10, [URL].
3. Buntarou Kusumoto, Yasuhiro Kubota, Takayuki Shiono, Fabricio Villalobos, Biogeographical origin effects on exotic plants colonization in the insular flora of Japan, Biological Invasions, 10.1007/s10530-021-02550-3, 2021.05, Understanding the mechanisms of biological invasion is fundamental for biodiversity conservation in the Anthropocene. This study focused on a large-scale colonization pattern of exotic seed plants, which include 1094 species characterized by different geographical origins, into the insular flora of Japan. We investigated a nation-wide pattern of species richness and phylogenetic structure (clustering/over-dispersion) of exotic and its recipient native species (4664 species). We tested the invasion hypotheses associated with environmental filtering, biological resistance of recipient assemblages, human disturbance and biogeographical origins of exotics. The exotics originated from the same (Palearctic and Indo-Malay) and adjacent (Nearctic and Oceanic) biogeographical regions were widely distributed across the country under temperate climate condition, whereas tropical exotic plants from remote regions (Afrotropic, Australasian, and Neotropical) colonized mainly the south-western parts of Japan. Exotic species richness and phylogenetic structure, especially those from the same/adjacent regions, were well explained by climatic, edaphic, and topographic factors, supporting the environmental filtering hypothesis. For all the biogeographical origins, exotic richness was positively associated with native richness, opposing the biological resistance hypothesis. Human disturbance was positively associated with exotic richness, while its relationships with the exotics’ phylogenetic structure varied according to their biogeographical origins. These findings indicate that site’s invasibility was determined by the combination of exotic’s biogeographical origins and abiotic/biotic conditions of its recipient native flora. Our results suggest that global warming may accelerate the northward expansion of tropical exotic plants while future land-use changes can promote biological invasion regardless of exotics’ origins..
4. Yasuhiro Kubota, Takayuki Shiono, Buntarou Kusumoto, Junichi Fujinuma, Multiple drivers of the COVID-19 spread: The roles of climate, international mobility, and region-specific conditions, PLOS ONE, 10.1371/journal.pone.0239385, 15, 9, e0239385-e0239385, 2020.09.
5. Buntarou Kusumoto, Takayuki Shiono, Yasuhiro Kubota, Ethnobotany-informed trait ecology: measuring vulnerability of timber provisioning services across forest biomes in Japan, Biodiversity and Conservation, 10.1007/s10531-020-01974-y, 29, 7, 2297-2310, 2020.06.
6. Werner Ulrich, Buntarou Kusumoto, Simone Fattorini, Yasuhiro Kubota, Factors influencing the precision of species richness estimation in Japanese vascular plants, DIVERSITY AND DISTRIBUTIONS, 10.1111/ddi.13049, 26, 6, 769-778, 2020.06, Aim Estimating species richness from a series of samples is an important and widely debated issue in ecology and biodiversity conservation. Numerous tests of respective richness estimators gave insights into the precision, the limitations and the pitfalls of richness forecasting. However, few benchmark tests used almost complete empiric census data obtained at those spatial scales where richness estimation is most useful for conservation management.Location Japan.Methods We use an extraordinary dataset on the spatial distribution of Japanese plants containing complete information on the occurrence of each Japanese plant species at the 10 x 10 km(2) grid cell level. We link the estimates of four estimators representing different theoretical approaches, Chao2, rarefaction, species-area relationships (SAR) and species abundance distributions (SAD), to environmental data using a fully nested sampling design.Results Chao2 and rarefaction behaved very similar in all tests and significantly underestimated true richness below 40% sampling fraction. SAR and SAD were less precise than Chao2 and rarefaction at higher sampling fraction but also less affected by low sample size. In general, SAD provided robust estimates over the whole range of sampling fraction and 67.4% of estimates ranged within the 10% error level. Higher species spatial turnover increased and high evenness in occurrence decreased the precision of the SAD estimator. Precision of the four estimators was largely unaffected by environmental variability but increased with increasing latitude.Main conclusions Our results strongly indicate that the pattern of Japanese plant species spatial distribution is sufficiently scale invariant for richness estimators to provide precise forecasting results at the country level. The simplest process to generate such a spatial distribution is ecological drift..
7. Moriaki Yasuhara, Chih-Lin Wei, Michal Kucera, Mark J Costello, Derek P Tittensor, Wolfgang Kiessling, Timothy C Bonebrake, Clay R Tabor, Ran Feng, Andrés Baselga, Kerstin Kretschmer, Buntarou Kusumoto, Yasuhiro Kubota, Past and future decline of tropical pelagic biodiversity., Proceedings of the National Academy of Sciences of the United States of America, 10.1073/pnas.1916923117, 117, 23, 12891-12896, 2020.06, A major research question concerning global pelagic biodiversity remains unanswered: when did the apparent tropical biodiversity depression (i.e., bimodality of latitudinal diversity gradient [LDG]) begin? The bimodal LDG may be a consequence of recent ocean warming or of deep-time evolutionary speciation and extinction processes. Using rich fossil datasets of planktonic foraminifers, we show here that a unimodal (or only weakly bimodal) diversity gradient, with a plateau in the tropics, occurred during the last ice age and has since then developed into a bimodal gradient through species distribution shifts driven by postglacial ocean warming. The bimodal LDG likely emerged before the Anthropocene and industrialization, and perhaps ∼15,000 y ago, indicating a strong environmental control of tropical diversity even before the start of anthropogenic warming. However, our model projections suggest that future anthropogenic warming further diminishes tropical pelagic diversity to a level not seen in millions of years..
8. K. Fukaya, B. Kusumoto, T. Shiono, J. Fujinuma, Y. Kubota, Integrating multiple sources of ecological data to unveil macroscale species abundance, Nature Communications, 11, 1695, 2020.04.
9. Towards strengthening plant ex-situ conservation in Japan.
10. Buntarou Kusumoto, Mark J. Costello, Yasuhiro Kubota, Takayuki Shiono, Chi‐Lin Wei, Moriaki Yasuhara, Anne Chao, Global distribution of coral diversity: Biodiversity knowledge gradients related to spatial resolution, Ecological Research, 10.1111/1440-1703.12096, 35, 2, 315-326, 2020.03.
11. Osamu Komori, Shinto Eguchi, Yusuke Saigusa, Buntarou Kusumoto, Yasuhiro Kubota, Sampling bias correction in species distribution models by quasi-linear Poisson point process, Ecological Informatics, 10.1016/j.ecoinf.2019.101015, 55, 2020.01.
12. Protocol for developing local biodiversity strategy and conservation action plan.
13. Effectiveness of Invasive Species Eradication Efforts on Biodiversity Conservation : Spatial Congruence between Conservation Priority Areas and Threat.
14. Y. Kubota, B. Kusumoto, T. Shiono, W. Ulrich, Multiple filters affect tree species assembly in mid-latitude forest communities, Oecologia, 10.1007/s00442-018-4122-6, 187, 1, 245-253, 2018.05, Species assembly patterns of local communities are shaped by the balance between multiple abiotic/biotic filters and dispersal that both select individuals from species pools at the regional scale. Knowledge regarding functional assembly can provide insight into the relative importance of the deterministic and stochastic processes that shape species assembly. We evaluated the hierarchical roles of the α niche and β niches by analyzing the influence of environmental filtering relative to functional traits on geographical patterns of tree species assembly in mid-latitude forests. Using forest plot datasets, we examined the α niche traits (leaf and wood traits) and β niche properties (cold/drought tolerance) of tree species, and tested non-randomness (clustering/over-dispersion) of trait assembly based on null models that assumed two types of species pools related to biogeographical regions. For most plots, species assembly patterns fell within the range of random expectation. However, particularly for cold/drought tolerance-related β niche properties, deviation from randomness was frequently found
non-random clustering was predominant in higher latitudes with harsh climates. Our findings demonstrate that both randomness and non-randomness in trait assembly emerged as a result of the α and β niches, although we suggest the potential role of dispersal processes and/or species equalization through trait similarities in generating the prevalence of randomness. Clustering of β niche traits along latitudinal climatic gradients provides clear evidence of species sorting by filtering particular traits. Our results reveal that multiple filters through functional niches and stochastic processes jointly shape geographical patterns of species assembly across mid-latitude forests..
15. A geometric approach to scaling individual distributions to macroecological patterns.
16. Systematic conservation planning for biodiversity conservation: Basic concepts and outline of analysis procedure
Systematic conservation planning (SCP) provides a decision-support framework for biodiversity conservation for multistakeholder deliberation. The core concept for designing protected area (PA) networks is the CAR principle, which comprises Comprehensiveness, Adequacy, and Representativeness. This is the basis of conservation planning, involving the identification of potential biodiversity patterns within a PA network as sampled areas. Priority areas for implementing conservation targets are identified in a spatially explicit manner, based on site-selection algorithms using biodiversity features and socioeconomic cost layers. Site-selection algorithms have roots in the concept of complementarity, which is related to ecological/evolutionary distinctiveness and the spatial turnover of biodiversity features among sites. Complementarity is a conceptual attribute of siteselection algorithms used to explore the minimum-set problem. Irreplaceability constitutes an index of conservation priority, and it is informative to associate the irreplaceability score with threat/vulnerability levels among sites when using a reactive conservation approach. Spatial prioritization of the Zonation algorithm is a promising tool for defining conservation targets recursively, and enables us to prioritize ranking for minimizing biodiversity loss under socioeconomic constraints. The concept of persistence is an important one for the future development of SCP, which currently assumes static biodiversity patterns. Incorporating macroecological patterns and underlying processes into the CAR principle is critical for maintaining biogeographical potential in conservation planning..
17. A theory for ecological survey methods to map individual distributions.
18. A Theory For Ecological Survey Methods To Map Individual Distributions.
19. Buntarou Kusumoto, Takayuki Shiono, Masashi Konoshima, Atsushi Yoshimoto, Takayuki Tanaka, Yasuhiro Kubota, How well are biodiversity drivers reflected in protected areas? A representativeness assessment of the geohistorical gradients that shaped endemic flora in Japan, Ecological Research, 10.1007/s11284-017-1451-6, 32, 3, 299-311, 2017.04, Protected areas function as a lifeboat that can preserve the origins and maintenance of biodiversity. We assessed the representativeness of biodiversity in existing protected areas in Japan using a distribution dataset and phylogenetic tree for 5565 Japanese vascular plant species. We first examined the overlap of species distribution with the existing protected areas and identified the minimum set representing all plant species. Second, we evaluated the relative importance of environmental variables in explaining the spatial arrangement of protected areas using a random forest model. Finally, we clarified how potential drivers of plant diversity were sufficiently captured within the protected areas network. Although the protected areas captured the majority of species, nearly half of the minimum set areas were selected from outside the existing protected areas. The locations of existing protected areas are mainly associated with geographical and socio-economic factors rather than key biodiversity features (including evolutionary distinctiveness). Moreover, critical biodiversity drivers, which include current climate, paleoclimatic stability, and geographical isolation, were biasedly emulated within the existing protected areas. These findings demonstrate that current conservation planning fails to represent the ecological and evolutionary processes relevant to species sorting, dispersal limitation, and allopatric speciation. In particular, under-representativeness of historically stable habitats that function as evolutionary hotspots or refugia in response to climate changes may pose a threat to the long-term persistence of Japan's endemic biota. This study provides a fundamental basis for developing prioritization measures to retain species assembly processes and in situ diversification along current climatic and geohistorical gradients..
20. Spatially Explicit Approach To Population Abundance Estimation In Field Surveys.
21. Tsunoda, T., Kusumoto, B., Okada, K.-I., Aoshima, Y., Kume, A., The 30th anniversary of Ecological Research: past, present, and future, Ecological Research, 10.1007/s11284-017-1457-0, 32, 4, 451-457, 2017.04, In 2016, Ecological Research (ER) celebrated its 30th anniversary. ER's goal is to be the leading ecological, evolutionary, and biodiversity journal in Asia. This article introduces the development of ER, improvements to its editorial system and their outcomes, and the strategies designed to achieve this goal. ER has already become a leading comprehensive and international publication as shown by statistical evidence and its strong editorial foundation. However, some members of the Ecological Society of Japan (ESJ) retain impressions of an old stereotype about ER. The discrepancy between the current status of the journal and its stereotype may explain why submissions from Japan remain static. A new article category for ER, Biodiversity in Asia, was created to encourage Asian studies. In addition, the Forum category is dedicated to promoting a broad understanding of the ESJ's various activities. To promote open science, the proportion of open access articles in the journal is increasing. The publication of Data papers has been accelerated to improve the public availability of excellent open data sets. ER symposia and seminars provide good opportunities for members to participate. ER financially supports the invitation of scientists internationally to facilitate research exchanges with other countries and consequently promotes the internationalization of the ESJ. The ESJ is open to the world's ecologists, and your participation in developing ER is welcome..
22. Yasuhiro Kubota, Buntarou Kusumoto, Takayuki Shiono, Takayuki Tanaka, Phylogenetic properties of Tertiary relict flora in the east Asian continental islands: imprint of climatic niche conservatism and in situ diversification, Ecography, 10.1111/ecog.02033, 40, 3, 436-447, 2017.03, Understanding biodiversity patterns on islands has long been a central aim in ecology and conservation biology. Island-specific biogeographical processes play substantial roles in the formation of endemic biota. Here, we examined how climate niche conservatism and geohistorical factors are interactively associated with in situ diversification of Tertiary relict flora in the east Asian continental islands. We generated two novel datasets for species distribution and phylogeny that included all of the known vascular plant species in Japan (5575). Then we tested phylogenetic signal of climatic tolerance, in terms of absolute minimum temperature and water balance, and explored environmental predictors of phylogenetic structure (evolutionary derivedness and clustering) of species assemblages. Although phylogenetic signal of climatic tolerance was significant across the phylogeny of most species, the strength of climatic niche conservatism differed among ferns, gymnosperms, angiosperm trees, and angiosperm herbs. For angiosperm trees, cold temperatures acted as environmental filters that generated phylogenetic derivedness/clustering of species assemblages. For fern and angiosperm herb species, however, phylogenetic properties were not associated with climatic harshness. These contrasting patterns among groups reflected climate niche evolution in vascular plants with different growth forms and traits
for example, diversification of angiosperm trees (but not fern and herb) occurred in response to historical climatic cooling. More importantly, geographical constraints contributed to evolutionary radiation that resulted from isolation by distance from the continent or by elevation. Quaternary climate change was also associated with clade-specific radiation in refugial habitats. The degree to which geographical, geological, and palaeoclimatic variables explain the phylogenetic structure underscores the importance of isolation- and habitat-stability-related geohistorical processes in driving in situ diversification despite climatic niche conservatism. We propose that the highly endemic flora of the east Asian islands resulted from the interplay of idiosyncratic regional factors, and ecological and evolutionary processes, such as climate niche assembly and adaptive/nonadaptive radiation..
23. Werner Ulrich, Andres Baselga, Buntarou Kusumoto, Takayuki Shiono, Hanna Tuomisto, Yasuhiro Kubota, The tangled link between β- and γ-diversity: a Narcissus effect weakens statistical inferences in null model analyses of diversity patterns, Global Ecology and Biogeography, 10.1111/geb.12527, 26, 1, 1-5, 2016.09.
24. Development and Evaluation of Teaching Methods of the Biodiversity Science Using the Online Tool “TimeTree: the Timescale of Life”
"TimeTree" provides information about evolutionary time among organisms, i.e. when two species have diverged from a common ancestor, thus allowing us to easily draw a phylogenetic tree of life. Using this online tool, we developed teaching methods to understand the concept of biodiversity on the basis of evolution, and further examined its effect on students' learning. In order to evaluate the effect of active learning using "TimeTree", we conducted a field experiment targeting 47 university students belonging to a general education course. We first examined the students on their knowledge of evolution biology, and then gave the students an assignment using smartphone that investigates divergence times between various species in the zoo. The students looked around the zoo and searched for the divergence times of pairs of 10 animal species, as well as those of 7 primates." TimeTree" was a tractable online tool for the students. Most students could successfully draw a phylogenetic tree among species using the data of the divergence times. Finally, we conducted the same test of their knowledge of evolution biology. By comparing the scores of pre- and post-tests, we found significant effects that improve the understanding of tree thinking, macroevolution, the timescale of evolution, and biogeography. In conclusion, the teaching or training using the online tool "TimeTree" was effective for promoting the understanding of evolution and biodiversity that is regarded as an important unit in the new teaching guidelines of biological education..