Researcher Database

Shunsuke Utsumi
Field Science Center for Northern Biosphere Forest Research Station Southern Forestry Research and Development Office
Associate Professor

Researcher Profile and Settings

Affiliation

  • Field Science Center for Northern Biosphere Forest Research Station Southern Forestry Research and Development Office

Job Title

  • Associate Professor

Research funding number

  • 10642019

ORCID ID

J-Global ID

Research Interests

  • Biodiversity   Evolutionary ecology   Population genetics   Population ecology   Community ecology   Plant-animal interaction   

Research Areas

  • Life sciences / Forest science
  • Life sciences / Evolutionary biology
  • Life sciences / Ecology and environmental science

Association Memberships

  • SOCIETY OF EVOLUTIONARY STUDIES, JAPAN   THE SOCIETY OF POPULATION ECOLOGY   THE ECOLOGICAL SOCIETY OF JAPAN   

Research Activities

Published Papers

  • Nanoko Meguro, Osamu Kishida, Shunsuke Utsumi, Shigeru Niwa, Susumu Igarashi, Chikara Kozuka, Aiko Naniwa, Takuya Sato
    Ecological Research 35 (3) 482 - 493 0912-3814 2020/05 [Refereed][Not invited]
  • Yuzu Sakata, Shunsuke Utsumi, Timothy P. Craig, Joanne K. Itami, Mito Ikemoto, Takayuki Ohgushi
    Ecology and Evolution 2020/03/02 [Refereed][Not invited]
  • Canadian Journal of Fisheries and Aquatic Sciences 1205-7533 2020/02/03 [Refereed][Not invited]
     
    We studied movement of a native salmonid, white-spotted charr (Salvelinus leucomaenis), in a 1-km tributary in northern Hokkaido, Japan, in May-July 2018. Based on physical mark-recapture of 501 unique individuals and detection by mobile PIT antenna over monthly intervals, a majority of fish (70-80 %) stayed within 60 m of previously released locations, demonstrating what appeared to be restricted movement patterns. However, fixed PIT antenna data showed that as much as 17% of marked individuals emigrated from the study area during the two-month study period. Probability of emigration did not depend on where in the 1-km segment individuals had been released, indicating that emigration likely represented long-distance movement. Once emigrants made a decision to emigrate, they left the tributary within 1-3 median days by moving downstream in a unidirectional manner, based on detections at a total of three antenna arrays deployed throughout the tributary. Our multi-scale analysis provided strong support for co-existence of short- and long-distance movement patterns, and we conclude that movement data at multiple spatial scale complement each other to characterize population-scale movement.
  • Chisato Terada, TaeOh Kwon, Nobuko Kazahari, Osamu Kishida, Shunsuke Utsumi
    Ecological Research 2019/05/24 [Refereed][Not invited]
  • 遺伝子・多様性・循環の科学 生態学の領域融合へ 2019/02/28 [Refereed][Not invited]
  • Yuzu Sakata, Timothy, P. Craig, Joanne K. Itami, Mito Ikemoto, Shunsuke Utsumi, Takayuki Ohgushi
    Evolutionary Ecology Springer Nature America, Inc 2018/10 [Refereed][Not invited]
  • Shinnosuke Kagiya, Masaki Yasugi, Hiroshi Kudoh, Atsushi J. Nagano, Shunsuke Utsumi
    Molecular Ecology 27 (5) 1284 - 1295 1365-294X 2018/03/01 [Refereed][Not invited]
     
    Understanding how genetic variation within a foundation species determines the structure of associated communities and ecosystem processes has been an emerging frontier in ecology. Previous studies in common gardens identified close links between intraspecific variation and multispecies community structure, and these findings are now being evaluated directly in the complex natural ecosystem. In this study, we examined to what extent genomic variation in a foundation tree species explains the structure of associated arthropod communities in the field, comparing with spatial, temporal and environmental factors. In a continuous mixed forest, arthropods were surveyed on 85 mature alders (Alnus hirsuta) in 2 years. Moreover, we estimated Nei's genetic distance among the alders based on 1,077 single nucleotide polymorphisms obtained from restricted-site-associated DNA sequencing of the alders’ genome. In both years, we detected significant correlations between genetic distance and dissimilarity of arthropod communities. A generalized dissimilarity modelling indicated that the genetic distance of alder populations was the most important predictor to explain the variance of arthropod communities. Among arthropod functional groups, carnivores were consistently correlated with genetic distance of the foundation species in both years. Furthermore, the extent of year-to-year changes in arthropod communities was more similar between more genetically closed alder populations. This study demonstrates that the genetic similarity rule would be primarily prominent in community assembly of plant-associated arthropods under temporally and spatially variable environments in the field.
  • Kyoritsu Shuppan Co., Ltd. 2017/06 [Refereed][Not invited]
  • Mito Ikemoto, Takashi Y. Ida, Shunsuke Utsumi, Takayuki Ohgushi
    ECOLOGICAL ENTOMOLOGY 42 (2) 164 - 172 0307-6946 2017/04 [Refereed][Not invited]
     
    1. The flower visitor community consists not only of pollinators but also of non-pollinators, such as florivores, thieves and predators that attack flower visitors. Although there is increasing evidence that early-season foliar herbivory influences pollinator visitation through changes in floral traits, few studies have explored indirect effects of foliar herbivory on community structure of the flower visitors. We examined how early-season foliar herbivory influences the flower visitor community established in late season. 2. We conducted an inoculation experiment using a lacebug (Corythucha marmorata), which is a predominantly herbivorous insect attacking leaves of tall goldenrod (Solidago altissima) in Japan. 3. Flower abundance significantly decreased when damaged by the lacebug. The numbers of pollinators, florivores and thieves were positively correlated with flower abundance, whereas predators were not. In response to flower abundance, florivores decreased on damaged plants. On the other hand, thieves increased on damaged plants, and pollinators and predators did not differ between damaged and undamaged plants. 4. When effects of flower abundance were excluded, foliar herbivory still influenced florivores negatively and thieves positively. This implies that factors besides flower abundance may have affected the numbers of florivores and thieves. 5. Community composition of flower visitors on damaged plants significantly differed from undamaged plants, although overall abundance, taxonomic richness and taxonomic evenness were unaffected by foliar herbivory in the early season. It is important to recognise that only evaluating species diversity and overall abundance may fail to detect the significant consequence of early-season herbivory on the flower visitor community.
  • Yoshino Ando, Shunsuke Utsumi, Takayuki Ohgushi
    FUNCTIONAL ECOLOGY 31 (3) 632 - 641 0269-8463 2017/03 [Refereed][Not invited]
     
    Ecological communities consist of antagonistic and mutualistic interactions that can vary in their strength. Indirect effects act among species within or across trophic levels through multiple pathways in an interaction network. Although there are many studies showing indirect effects in ecological communities, we know little about how indirect effects impact the wider community by linking other direct and indirect interactions. Herbivore-induced indirect effects are ubiquitous and powerful forces in structuring ecological communities. In a plant-associated network, aphids have the potential to connect multiple interactions through ant- and plant-mediated indirect effects on co-occurring and/or temporally separated species. We examined how aphids affect the interaction network on tall goldenrod, Solidago altissima, based on data of arthropod species on it with and without the aphid, Uroleucon nigrotuberculatum, using structural equationmodelling (SEM) analysis. The presence of aphids greatly changed the strength of several species interactions throughout the season. In the early season, aphids had negative indirect effects on leafhoppers and moth caterpillars through ants. On the other hand, aphid-induced leaf regrowth decreased scale insects but increased grasshoppers in the late season, when the aphid was no longer present. Moreover, the aphid-generated interactions increased seed production of tall goldenrods, due to indirect pathways through the leaf regrowth. The aphid thus played a critical role as a network creator in determining the interaction network by generating ant- and plant-mediated indirect effects. In particular, the aphid-induced leaf regrowth contributed to interaction diversity (i.e. total number of positive/negative interactions and link density per each species) by connecting arthropod species in the early and late seasons. We disentangled the complexity of direct and indirect pathways generated by the aphid (i.e. keystone herbivore), which largely determines community structure of associated arthropods and plant reproductive success. Our study combining ant- and plant-mediated indirect interactions mediated by the aphid provides a basis of better understanding of the underlying mechanisms of how the impact of the keystone herbivore can spread through plant-based insect networks via direct and indirect pathways.
  • 北大研究林の強みを活かした教育研究の充実に向けて―平成27年度報告会総合討論―
    中路達郎, 岸田治, 内海俊介, 福澤加里部, 小林真, 伊藤悠也, 間宮春大, 芦谷大太郎, 上浦達哉
    北方森林保全技術 34 43 - 47 2017 [Not refereed][Not invited]
  • Shunsuke Utsumi
    JOURNAL OF ECOLOGY 103 (4) 829 - 839 0022-0477 2015/07 [Not refereed][Not invited]
     
    Genetic variation in individual species can have important ecological consequences, and sometimes, these interactions are mediated through another species. For example, genetic variation in an herbivore could alter plant responses that then influence other plant-associated arthropods. However, few systems have experimentally tested the ecological consequences of genetic variation as mediated through other species, especially within the same trophic community context. I studied how evolution of feeding preference in the willow leaf beetle (Plagiodera versicolora), which occurs under selection in a herbivore community context, feeds back to an arthropod community through plant-mediated indirect interactions. Previous studies show beetle populations locally adapt distinct preferences ranging from the gourmet-type, which feeds exclusively on new leaves of willows, to the no-preference (no-pref) type, which displays non-preferential feeding on leaves of different ages. I conducted field experiments at two sites that mimicked evolutionary changes in the feeding preference of the leaf beetle. I manipulated the composition of leaf beetle feeding types for 6days in spring and then investigated subsequent development of arthropod communities. I found that initial herbivory by a higher proportion of gourmet-type beetles led to lower subsequent abundance of conspecific beetle larvae. In contrast, a higher proportion of gourmet-type beetles resulted in higher abundance of aphids. Aphid-tending ants also increased with the increasing abundance of aphids. As a result, species diversity of arthropod communities decreased with the proportion of gourmet-type beetles in the initial beetle treatment. Community assembly dynamics were significantly influenced by interactive effects between the initial beetle treatment and subsequent colonizer species identities. Thus, beetle genetic variation had long-lasting effects through a temporal chain of indirect interactions likely mediated through induced plant responses and the abundance of aphids.Synthesis. Evolutionary changes in feeding traits within an herbivore species had profound but predictable impact on local arthropod communities. Because the feeding evolution of herbivores nearly always occurs in a community context, plant-mediated feedback loops between the evolution and ecological community of arthropods may be widespread in nature.
  • Teiji Sota, Hideki Kagata, Yoshino Ando, Shunsuke Utsumi, Takashi Osono
    SpringerBriefs in Biology Springer Japan 2014 [Refereed][Not invited]
  • Teiji Sota, Hideki Kagata, Yoshino Ando, Shunsuke Utsumi, Takashi Osono
    Species Diversity and Community Structure Springer Japan 25  2013/08 [Refereed][Not invited]
  • Teiji Sota, Hideki Kagata, Yoshino Ando, Shunsuke Utsumi, Takashi Osono
    Species Diversity and Community Structure Springer Japan 1  2013/08 [Refereed][Not invited]
  • Teiji Sota, Hideki Kagata, Yoshino Ando, Shunsuke Utsumi, Takashi Osono
    Species Diversity and Community Structure Springer Japan 45  2013/08 [Refereed][Not invited]
  • Shunsuke Utsumi
    ECOLOGICAL RESEARCH 28 (3) 359 - 371 0912-3814 2013/05 [Refereed][Invited]
     
    In the 21st century, researchers have attempted a synthesis between community ecology and evolutionary biology. This emerging research area, which aims to synthesize community ecology and evolutionary biology, is evolutionary community ecology. Evolutionary community ecology addresses how intraspecific trait variation in community members is essential for predicting community properties and, how community properties are a key component of the selective forces that determine genetic and phenotypic variation in a community member. In this paper, I review recent findings in evolutionary community ecology in plant-associated arthropods in terrestrial ecosystems. I discuss roles of both genetic variation and phenotypic plasticity as a source of trait variation in plants in shaping plant-associated arthropod communities. Also, I discuss effects of genetic variation in herbivores on plant-associated arthropod communities. Furthermore, I highlight community context evolution in which multiple species interactions and community composition affect trait evolution of a community member. Finally, I argue that future studies should investigate a feedback loop between community and evolutionary dynamics beyond unidirectional studies on effects of evolution on a community or vice versa. This approach will provide major insights into mechanistic principles for making predictions of community ecology.
  • Shunsuke Utsumi, Yoshino Ando, Heikki Roininen, Jun-ichi Takahashi, Takayuki Ohgushi
    Ecology Letters 16 (3) 362 - 370 1461-0248 2013 [Refereed][Not invited]
     
    Several recent studies have emphasised that community composition alters species trait evolution. Here, we demonstrate that differences in composition of local herbivore communities lead to divergent trait evolution of the leaf beetle Plagiodera versicolora through plant-mediated indirect interactions. Our field surveys, genetic analyses and community-manipulation experiments show that herbivore community composition determines the degree of herbivore-induced regrowth of willows (Salicaceae), which in turn, promotes the divergent evolution of feeding preference in the leaf beetle from exclusive preference for new leaves to a lack of preference among leaf-age types. Regrowth intensity depends both on the differential response of willows to different herbivore species and the integration of those herbivore species in the community. Because herbivore-induced regrowth involves phenological changes in new leaf production, leaf beetle populations develop divergent feeding preferences according to local regrowth intensity. Therefore, herbivore community composition shapes the selection regime for leaf beetle evolution through trait-mediated indirect interactions. © 2012 Blackwell Publishing Ltd/CNRS.
  • Yoshino Ando, Shunsuke Utsumi, Takayuki Ohgushi
    ECOLOGICAL ENTOMOLOGY 36 (5) 643 - 653 0307-6946 2011/10 [Refereed][Not invited]
     
    1. The aphid Uroleucon nigrotuberculatum Olive, which is specialised to the tall goldenrod, Solidago altissima L., in its native range, has become a dominant species on the introduced tall goldenrod in Japan. How this exotic aphid influenced arthropod communities on the introduced tall goldenrod in aphid-present (spring) and aphid-absent (autumn) seasons was examined, using an aphid removal experiment. 2. In spring, aphid presence increased ant abundance because aphid honeydew attracted foraging ant workers. A significant negative correlation was found between the numbers of ants and herbivorous insects other than aphids on the aphid-exposed plants, but no significant correlation was detected on the aphid-free plants. Thus, the aphid presence was likely to decrease the abundance of co-occurring herbivorous insects through removal behaviour of the aphid-tending ants. There were no significant differences in plant traits between the aphid-exposed and aphid-free plants. 3. In autumn, the numbers of lateral shoots and leaves, and the leaf nitrogen content were increased in response to the aphid infestation in spring. Because of the improvement of plant traits by aphid feeding, the abundance of leaf chewers increased on aphid-exposed plants. In contrast, the abundance of sap feeders decreased on the aphid-exposed plants. In particular, the dominant scale insect among sap feeders, Parasaissetia nigra Nietner, decreased, followed by a decrease in the abundance of ants attending P. nigra. Thus, aphid feeding may have attenuated the negative impacts of the tending ants on leaf chewers. 4. Aphid presence did not change herbivore species richness but changed the relative density of dominant herbivores, resulting in community-wide effects on co-occurring herbivores through ant-mediated indirect effects, and on temporally separated herbivores through plant-and ant-mediated indirect effects. The aphid also altered predator community composition by increasing and decreasing the relative abundance of aphid-tending ants in the spring and autumn, respectively.
  • Shunsuke Utsumi, Yoshino Ando, Timothy P. Craig, Takayuki Ohgushi
    PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 278 (1721) 3108 - 3115 0962-8452 2011/10 [Refereed][Not invited]
     
    It is critical to incorporate the process of population dynamics into community genetics studies to identify the mechanisms of the linkage between host plant genetics and associated communities. We studied the effects of plant genotypic diversity of tall goldenrod Solidago altissima on the population dynamics of the aphid Uroleucon nigrotuberculatum. We found genotypic variation in plant resistance to the aphid in our experiments. To determine the impact of plant genotypic diversity on aphid population dynamics, we compared aphid densities under conditions of three treatments: single-genotype plots, mixed-genotype plots and mixed-genotype-with-cages plots. In the latter treatment plants were individually caged to prevent natural enemy attack and aphid movement among plants. The synergistic effects of genotypes on population size were demonstrated by the greater aphid population size in the mixed-genotype treatment than expected from additive effects alone. Two non-exclusive hypotheses are proposed to explain this pattern. First, there is a source-sink relationship among plant genotypes: aphids move from plant genotypes where their reproduction is high to genotypes where their reproduction is low. Second, natural enemy mortality is reduced in mixed plots in a matrix of diverse plant genotypes.
  • Shunsuke Utsumi
    POPULATION ECOLOGY 53 (1) 23 - 34 1438-3896 2011/01 [Refereed][Not invited]
     
    It is increasingly recognized that the ecology of communities and evolution of species within communities are interdependent, and researchers have been paying attention to this rapidly emerging field of research, i.e., through studies on eco-evolutionary dynamics. Most of the studies on eco-evolutionary dynamics have been concerned with direct trophic interactions. However, community ecologists have shown that trait-mediated indirect effects play an important role in shaping the structure of natural communities. In particular, in terrestrial plant-insect systems, indirect effects mediated through herbivore-induced plant responses are common and have a great impact on the structure of herbivore communities. This review describes eco-evolutionary dynamics in herbivorous insect communities, and specifically focuses on the key role of herbivore-induced plant responses in eco-evolutionary dynamics. First, I review studies on the evolution of herbivore traits relevant to plant induction and discuss evolution in a community context mediated by induced plant responses. Second, I highlight how intraspecific genetic variation or evolution in herbivore traits can influence herbivore community structure. Finally, I propose the hypothetical model that induced plant responses supports eco-evolutionary feedback in herbivore communities. In this review, I argue that the application of the indirect interaction web approaches into studies on eco-evolutionary will provide profound insights into understanding of mechanisms of the generation and maintenance of biodiversity.
  • Takayuki Ohgushi, Yoshino Ando, Shunsuke Utsumi, Timothy P. Craig
    JOURNAL OF PLANT INTERACTIONS 6 (2-3) 147 - 150 1742-9145 2011 [Refereed][Not invited]
     
    Tall goldenrod, Solidago altissima, was introduced from North America 100 years ago, and it has become widely distributed all over Japan. We have been investigating plant-based indirect interaction webs on the tall goldenrod in Japan and the US. We found that arthropod communities on Japanese goldenrods are organized via plant- and ant-mediated indirect effects caused by the dominant aphid, Uroleucon nigrotuberculatum, which came from the US in the early 1990s. The aphid also generated bottom-up cascading effects on temporally separated communities. Our results highlight the importance of herbivore-induced plant phenotypes in determining the structure of indirect interaction webs. We review our ongoing research that focuses on the effect of plant genotypic variation on the formation of indirect interaction webs. Our findings of the genotypic effects on aphid population dynamics and herbivore community composition provide a more complete understanding of the community consequences of plant genotypic diversity, as well as herbivore-induced plant phenotypes.
  • Timothy P. Craig, Joanne K. Itami, Takayuki Ohgushi, Yoshino Ando, Shunsuke Utsumi
    JOURNAL OF PLANT INTERACTIONS 6 (2-3) 141 - 145 1742-9145 2011 [Refereed][Not invited]
     
    Host-associated differentiation is hypothesized to be one of the primary means by which new species of herbivorous insects evolve. Divergent selection for host plant use following a host shift is a critical assumption of host-associated differentiation. Host shifts are more likely to occur between closely related host species, and the probability of a host shift and of the evolution of reproductive isolation depends on the genetic variation within both the host plant population and the herbivorous insect. We have been studying the evolution of reproductive isolation in populations of Eurosta solidaginis that form galls on Solidago altissima altissima and Solidago altissima gilvocanescens. Each of the Eurosta populations is a host race that is partially but incompletely isolated from the other host races by its adaptation to its host plants. The Solidago sp. populations show high intraspecific variation within and among populations in their resistance to attack by the host races which are adapted to them. There is also evidence that they vary in their susceptibility to host races adapted to other Solidago species. We examine the hypothesis that the intraspecific Solidago variation determines the degree of gene flow among Eurosta populations and that this can create barriers or bridges to gene flow and therefore determine the course of speciation in these insects. The intraspecific host plant variation can influence the interactions with herbivores when it is an invasive species. The restricted range of genetic variation introduced into a new region may be a good or poor match with populations of herbivores that are also introduced into the new area.
  • Shunsuke Utsumi, Yoshino Ando, Takayuki Ohgushi
    JOURNAL OF PLANT INTERACTIONS 6 (2-3) 171 - 172 1742-9145 2011 [Refereed][Not invited]
     
    The questions of how the indirect interactions mediated by herbivore-induced plant responses influence trait evolution of herbivores have been poorly investigated. We previously demonstrated that allopatric populations of the willow leaf beetle, Plagiodera versicolora (Coleoptera: Chrysomelidae) could evolutionarily develop divergent preference, according to locally distinct intensity of induced plant regrowth. Our herbivore removal experiment suggested that the local intensity of herbivore-induced regrowth strongly influenced the geographic variation in the plant regrowth response. Furthermore, attack by another herbivore species could induce willow regrowth, which in turn increased the relative fitness of the beetles with strong preference for new leaves compared with the beetles with weak preference. Therefore, we conclude that the plant-utilizing trait of the leaf beetle can evolve in response to indirect effects of other herbivore species mediated by herbivore-induced plant regrowth.
  • Yoshino Ando, Shunsuke Utsumi, Timothy P. Craig, Joanne Itami, Takayuki Ohgushi
    JOURNAL OF PLANT INTERACTIONS 6 (2-3) 169 - 170 1742-9145 2011 [Refereed][Not invited]
     
    We have tried to understand mechanisms of organizing herbivore communities on introduced tall goldenrod, Solidago altissima. At first, to assess pattern on herbivore communities on S. altissima, we compared community composition, density, and species richness of herbivorous insects on S. altissima and on a related native species Solidago virgaurea at a same habitat in Japan. We found a large difference in community composition on the two plant species. In particular, exotic aphid greatly contributed to the difference in community composition. Next, to examine the aphid impacts on other herbivores, we conducted several experiments in Japan. We found strong impacts of the aphid on co-occurring herbivorous insects through the removal behavior of tending ants and on temporally separated herbivorous insects through changes in foliar quality and production of S. altissima. These two studies suggest that the exotic aphid plays an important role in organizing herbivore communities on S. altissima.
  • Shunsuke Utsumi, Osamu Kishida, Takayuki Ohgushi
    POPULATION ECOLOGY 52 (4) 457 - 459 1438-3896 2010/10 [Refereed][Not invited]
  • Shunsuke Utsumi, Yoshino Ando, Takeshi Miki
    POPULATION ECOLOGY 52 (4) 485 - 497 1438-3896 2010/10 [Refereed][Not invited]
     
    Plants have diverse ways of responding to damage by herbivores, such as changes in allelochemistry, physiology, morphology, growth, and phenology. These responses form the mechanistic basis for trait-mediated indirect interactions (TMIIs) between organisms on the plants. There is a growing appreciation that such TMIIs form complex networks (i.e., indirect interaction webs) in terrestrial plant-associated arthropod communities. Almost all previous studies have had the same framework: examining trait-mediated indirect effects within a single interactive unit consisting of one initiator of herbivore, a host plant as a mediator, and one receiver [trait-mediated indirect interaction unit (TMIU)]. However, this framework is too simple to understand the dynamics of the indirect interaction web. Recent studies suggest that there is a wide variety of interactions among TMIUs within a community, which may largely affect the outcomes of indirect effects in each unit. Here, we review recent advance in studies of trait-mediated indirect effects in plant-associated arthropod communities and explore the mechanisms of linkages among TMIUs. Then, we argue the importance of examining linkages among TMIUs as a new framework for future studies on the indirect interaction web. Finally, we propose the hypothesis that linkages among TMIUs contribute to the maintenance of biodiversity.
  • Yoshino Ando, Shunsuke Utsumi, Takayuki Ohgushi
    ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA 136 (2) 174 - 183 0013-8703 2010/08 [Refereed][Not invited]
     
    We compared community composition, density, and species richness of herbivorous insects on the introduced plant Solidago altissima L. (Asteraceae) and the related native species Solidago virgaurea L. in Japan. We found large differences in community composition on the two Solidago species. Five hemipteran sap feeders were found only on S. altissima. Two of them, the aphid Uroleucon nigrotuberculatum Olive (Hemiptera: Aphididae) and the scale insect Parasaissetia nigra Nietner (Hemiptera: Coccidae), were exotic species, accounting for 62% of the total individuals on S. altissima. These exotic sap feeders mostly determined the difference of community composition on the two plant species. In contrast, the herbivore community on S. virgaurea consisted predominately of five native insects: two lepidopteran leaf chewers and three dipteran leaf miners. Overall species richness did not differ between the plants because the increased species richness of sap feeders was offset by the decreased richness of leaf chewers and leaf miners on S. altissima. The overall density of herbivorous insects was higher on S. altissima than on S. virgaurea, because of the high density of the two exotic sap feeding species on S. altissima. We discuss the importance of analyzing community composition in terms of feeding guilds of insect herbivores for understanding how communities of insect herbivores are organized on introduced plants in novel habitats.
  • Shunsuke Utsumi, Osamu Kishida, Takayuki Ohgushi
    Population Ecology 52 (4) 457 - 459 1438-3896 2010 [Not refereed][Not invited]
  • Shunsuke Utsumi, Takayuki Ohgushi
    OIKOS 118 (12) 1805 - 1815 0030-1299 2009/12 [Refereed][Not invited]
     
    It has been widely accepted that herbivory induces morphological, phenological, and chemical changes in a wide variety of terrestrial plants. There is an increasing appreciation that herbivore-induced plant responses affect the performance and abundance of other arthropods. However, we still have a poor understanding of the effects of induced plant responses on community structures of arthropods. We examined the community-level effects of willow regrowth in response to damage by larvae of swift moth Endoclita excrescence (Lepidoptera: Hepialidae) on herbivorous and predaceous arthropods on three willow species, Salix gilgiana, S. eriocarpa and S. serissaefolia. The leaves of sprouting lateral shoots induced by moth-boring had a low C:N ratio. The overall abundance and species richness of herbivorous insects on the lateral shoots were increased on all three willow species. Densities of specialist chewers and sap-feeders, and leaf miners increased on the newly emerged lateral shoots. In contrast, the densities of generalist chewers and sap-feeders, and gall makers did not increase. Furthermore, ant and spider densities, and the overall abundance and species richness of predaceous arthropods increased on the lateral shoots on S. gilgiana and S. eriocarpa, but not S. serissaefolia. In addition to finding that effects of moth-boring on arthropod abundance and species richness varied among willow species, we also found that moth-boring, willow species, and their interaction differentially affected community composition. Our findings suggest that moth-boring has community-wide impacts on arthropod assemblages across three trophic levels via induced shoot regrowth and increase arthropod species diversity in this three willow species system.
  • Shunsuke Utsumi, Masahiro Nakamura, Takayuki Ohgushi
    JOURNAL OF ANIMAL ECOLOGY 78 (5) 953 - 963 0021-8790 2009/09 [Refereed][Not invited]
     
    P> Herbivory often changes resource quality for herbivorous insects through induced plant responses depending on the intensity of damage. We hypothesized that the willow's response following herbivory affects the entire arthropod community structure on the tree due to changes in plant quality. To examine this hypothesis, we investigated arthropod communities on three willow species, Salix gilgiana, Salix eriocarpa and Salix serissaefolia. In our common garden, cuttings were established in 2003 and experimental treatments were applied in 2005. Damage by a boring caterpillar of a swift moth (Endoclita excrescens) and artificial cutting of 25% stems were applied as partial herbivory within individual trees, and 100% cutting of stems was applied to represent severe herbivory to whole individual trees. These treatments stimulated lateral shoot production depending on damage intensity, resulting in full compensation for biomass loss. Positive relationships were detected between within-tree variation in foliar nitrogen content and overall abundance/species richness of herbivores. Moth boring and 25% cutting increased herbivore abundance and species richness relative to controls. However, we found no significant differences in herbivore abundance and species richness between 100% cut and control trees. Community composition of herbivore species was significantly different between the following three groups: (i) bored and 25% cut; (ii) 100% cut; and (iii) control trees. Changes in community structure of herbivores were likely due to changes in plant quality depending on the intensity of damage. Although total predator abundance and species richness were not significantly different among treatments, community composition of predator species was significantly different among treatments. These results indicate that herbivore-induced willow responses can largely determine the entire arthropod community structure of multitrophic levels due to changes in plant quality. We suggest that heterogeneous resource conditions induced by herbivory within and among plant individuals increase the species diversity of arthropods.
  • Shunsuke Utsumi, Yoshino Ando, Takayuki Ohgushi
    ECOLOGY LETTERS 12 (9) 920 - 929 1461-023X 2009/09 [Refereed][Not invited]
     
    Much attention has been paid to ecology and evolution of damage-induced plant responses. Recently, it has been emphasized that phenotypic plasticity, such as induced plant responses, has the potential to lead to evolutionary changes of interacting partners. Here, we report that induced plant regrowth promotes a locally adaptive feeding preference of a leaf beetle, Plagiodera versicolora. We found that there was among-population variation in the strength of the feeding preference of the leaf beetle for leaf-age types of conspecific host plants. The strength of the preference was positively correlated to leaf production of host plants across populations, and the intensity of induced regrowth was likely to have been responsible for geographic variation in new leaf production. Within one population, we detected a significant additive genetic variance and heritability in the preference for consuming new vs. old leaves. Moreover, the strength of preference was significantly related to egg production depending on the leaf-age types. Thus, allopatric populations can evolutionarily develop different adaptive preference, according to locally distinct patterns of induced host regrowth.
  • Shunsuke Utsumi, Takayuki Ohgushi
    ECOLOGICAL ENTOMOLOGY 33 (2) 250 - 260 0307-6946 2008/04 [Refereed][Not invited]
     
    1. We examined the plant-mediated indirect effects of the stem-boring moth Endoclita excrescens (Lepidoptera: Hepialidae) on the leaf beetle Plagiodera versicolora (Coleoptera: Chrysomelidae) in three willow species, Salix gilgiana, S. eriocarpa, and S. serissaefolia. 2. When the stem-boring moth larvae damaged stems in the previous year, willows were stimulated to produce vigorously growing lateral shoots on these stems. These new lateral shoots were significantly longer and the upper leaves had significantly higher nitrogen and water content than current-year shoots on unbored stems, although the carbon content and leaf dry mass were not different between lateral and current-year shoots. 3. In the field, leaf beetle larvae and adults had significantly greater densities on lateral shoots of bored stems than on current-year shoots of unbored stems. A laboratory experiment showed that female beetles had significantly greater mass and fecundity when fed on leaves of newly-emerged lateral shoots. Thus, the stem-boring moth had a positive effect on the temporally and spatially separated leaf beetle by increasing resource availability by inducing compensatory regrowth. 4. The strength of the indirect effects on the density and performance of the leaf beetle differed among willow species, because there was interspecific variation in host quality and herbivore-induced changes in plant traits. In particular, we suggest that the differences in magnitude of the changes among willow species in shoot length and leaf nitrogen content greatly affected the strength of the plant-regrowth mediated indirect effect, coupled with host-plant preference of the leaf beetle.
  • Shunsuke Utsumi, Takayuki Ohgushi
    POPULATION ECOLOGY 49 (3) 241 - 248 1438-3896 2007/07 [Refereed][Not invited]
     
    To examine plastic willow regrowth response to herbivory, we studied the effect of a boring insect, the swift moth Endoclita excrescens ( Hepialidae: Lepidoptera), which does not remove apical meristems, on shoot growth in three willow species - Salix gilgiana, S. eriocarpa, and S. serissaefolia - by direct observations and experiments in the field. We hypothesized that the stem-boring could initiate new lateral bud activation, and result in secondary shoot regrowth without the removal of the primary apical meristems. There were significantly more lateral shoots on naturally attacked than unattacked stems, and a significant positive correlation between lateral shoot density and the number of swift moth tunnels per tree was observed for all three willow species. Artificial boring, and larval infestation, resulted in an increase in the number of lateral shoots, but did not affect growth of current-year shoots. The length of lateral shoots differed between species, being significantly longer in S. gilgiana than S. eriocarpa and S. serissaefolia. The results of this study show that compensatory regrowth can result even if herbivory does not remove the apical meristem. We argue that this type of plant compensatory response is probably widespread, given that the stem-boring is a common feeding type of insect herbivores.
  • M Nakamura, S Utsumi, T Miki, T Ohgushi
    JOURNAL OF ANIMAL ECOLOGY 74 (4) 683 - 691 0021-8790 2005/07 [Refereed][Not invited]
     
    1. Following the passing of a typhoon over central Japan in late August 2001, a large-scale flood occurred owing to the heavy precipitation. Willow trees on the banks of the Yasu River were badly damaged. In the following year, we examined the effects of the flood on the regrowth response of a willow, Salix eriocarpa (Franch), and its subsequent effects on the densities of a leaf beetle, Plagiodera versicolora (Laicharting), and its predators. 2. We used 10 randomly selected pairs of heavily and lightly damaged trees. Field observations showed that the number of sprouting shoots was significantly greater on heavily damaged trees than on lightly damaged trees. The sprouts continued to grow until August, producing lateral shoots and leaves. 3. The numbers of leaf beetles at all developmental stages (egg, larva, pupa and adult) significantly increased on heavily damaged trees as compared to numbers on lightly damaged trees. Adults of the leaf beetle aggregated predominantly on sprouting shoots throughout the growing season. 4. As a result of the increase in the number of leaf beetles, leaf herbivory on heavily damaged trees was significantly greater than on lightly damaged trees. 5. Two arthropod predators, the larvae of the ladybird Aiolocaria hexaspilota (Hope) and the web-building spider Agelena opulenta (L. Koch), also increased significantly on heavily damaged trees. These findings indicate that the flood caused by the typhoon initiated bottom-up cascading effects from the willow to arthropod predators through herbivorous insects by increased foliage sprouting.

Books etc

MISC

Awards & Honors

  • 2012/03 The Ecological Society of Japan 16th Denzaburo Miyadi Award
     
    受賞者: Shunsuke Utsumi
  • 2011/10 The Society of Population Ecology 5th Population Ecology Young Scientist Award
     
    受賞者: Shunsuke Utsumi

Research Grants & Projects

  • Large-scale empirical tests for (co)evolutionary ecosystem restoration
    Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2019/04 -2024/03 
    Author : 内海 俊介, 門脇 浩明, 吉田 俊也, 小林 真
  • Determinant of primary succession in post-landslide forests and development of afforestation technique by using nitrogen fixing plant
    Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2019/04 -2024/03 
    Author : 小林 真, 内海 俊介, 山田 孝, 吉田 俊也
  • 景観群集ゲノミクス・アプローチによる群集生態-進化動態の統合的解明
    文部科学省:科学研究費補助金(若手研究(A))
    Date (from‐to) : 2016/04 -2020/03 
    Author : 内海 俊介
  • 植物と昆虫の相互作用における進化―生態ダイナミクス
    文部科学省:科学研究費補助金(基盤研究(B))
    Date (from‐to) : 2016/04 -2019 
    Author : 大串 隆之
  • ダムが森林の生物多様性に与える影響:渓畔林樹種の分散経路としての河川機能に着目して
    Water Resources Environment Center:WEC
    Date (from‐to) : 2013/04 -2015/03 
    Author : Shunsuke Utsumi
  • 文部科学省:科学研究費補助金(若手研究(B))
    Date (from‐to) : 2014 -2015 
    Author : 内海 俊介
  • 文部科学省:科学研究費補助金(基盤研究(B))
    Date (from‐to) : 2013 -2015 
    Author : 大串 隆之, 内海 俊介
     
    セイタカアワダチソウ上の昆虫群集の構造を調査した。セイタカアワダチソウヒゲナガアブラムシは季節を通して昆虫群集を大きく規定していた。特にアリと植物の形質の変化を介した間接効果が、アブラムシと共存している春の昆虫だけでなく、アブラムシがいなくなった秋の昆虫の個体数にも影響を与えていた。これにより、アブラムシによる植物を介する間接効果が時間的に棲み分けている春と秋の群集を繋ぐこと、アブラムシがアワダチソウ上の群集ネットワークのキーストン種であることがわかった。アメリカと日本のセイタカアワダチソウを滋賀とミネソタの実験圃場に植え、植食性昆虫群集を比較した。植食性昆虫の密度と種数について、滋賀では日本のアワダチソウの方がアメリカに比べて有意に増加した。一方、アメリカでは逆に日本のアワダチソウの方がアメリカに比べて密度と種数は有意に低下した。この結果は、日本とアメリカの植食性昆虫がそれぞれの地域に生育するアワダチソウの遺伝子型に適応していることを示唆している。アワダチソウグンバイの密度と食害レベルを日本各地の55カ所で調査した。グンバイの密度と食害はグンバイの定着年数が長くなるほど低下する傾向が見られた。また各地域のアワダチソウの倍数性を調べたところ、いずれも6倍体であった。原産地の北米では2、4、6倍体が分布しており、日本に侵入したのが6倍体のみか、6倍体だけが定着に成功した可能性が考えられる。さらに、アワダチソウの分子集団遺伝学的解析に不可欠なマイクロサテライトマーカーを開発した。アワダチソウの北海道への侵入状況、特に道北地域への分布拡大状況を明らかにするため、野外調査を行った。その結果、旭川近郊にアワダチソウ群落が確認され、道北地域の幌加内町や苫前町にもアワダチソウが定着していることがはじめて明らかになった。また、アブラムシもこれらの地域で定着していることが確認された。
  • The Japan Society for the Promotion of Science:Grant-in-Aid for Scientific Research
    Date (from‐to) : 2010/04 -2013/03 
    Author : Shunsuke Utsumi
  • 河川の流水特性が植物の再生長を介して流域の生物多様性に与える影響
    Foundation of River and Watershed Environment Management:The River Fund in charge of theFoundation of River and Watershed Environment Management
    Date (from‐to) : 2009/04 -2010/03 
    Author : Shunsuke Utsumi

Educational Activities

Teaching Experience

  • Advanced Course in Biodiversity Science II
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 環境科学院
    キーワード : 生物多様性、繁殖生態学、進化生態学、適応、生活史、生物間相互作用、被食防衛系、送粉系、植物生態学、昆虫生態学、群集生態学、生態系機能 biodiversity, reproductive ecology, evolutionary ecology, adaptation, life-history, biological interaction, defensive system, pollination system, plant ecology, entomological ecology, community ecology, ecosystem function
  • Fundamental Lecture in Biological Diversity
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 環境科学院
    キーワード : 生物多様性、生態系、生物種、生物群集、海洋、陸域、地球環境変化 biodiversity, ecosystem, species, community, ocean, land, global-change
  • Inter-Graduate School Classes(General Subject):Natural and Applied Sciences
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
    キーワード : 生物多様性、生態系、生物種、生物群集、海洋、陸域、地球環境変化
  • Advanced Course in Forest Sphere Science III (Conservation Biology)
    開講年度 : 2018
    課程区分 : 修士課程
    開講学部 : 環境科学院
    キーワード : 脊椎動物,保全,野外調査,研究発表 Vertebrate Ecology, Conservation, Field Investigation, Presentation
  • Practical Field Work on Wildlife Conservation
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 農学部
    キーワード : 野生動物管理、哺乳類、両生類、昆虫類,捕獲,カメラトラップ
  • Wildlife Management
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 農学部
    キーワード : 野生生物管理,生物多様性,遺伝的多様性,個体群生態学,移入種
  • Forest Influence
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 農学部
    キーワード : 森林、環境保全機能、生物多様性保全、野生生物保全、土地利用、流域保全、森林利用
  • Arts and Science Courses in English 2
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 国際本部
    キーワード : Ecosystem conservation, Sustainable bioproduction, Biodiversity, Material cycling, Harmonizable relation between human and environment
  • Seminar on Forest Influence
    開講年度 : 2018
    課程区分 : 学士課程
    開講学部 : 農学部
    キーワード : 森林の種類と分布、森林空間、環境保全機能、森林保全、資料作成方法、発表方法、ディスカッション

Committee Membership

  • 2019/09 - Today   The Society of Population Ecology   Board member


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.