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Species-specific use of allochthonous resources by ground beetles (Carabidae) at a river-land interface

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Title: Species-specific use of allochthonous resources by ground beetles (Carabidae) at a river-land interface
Authors: Terui, Akira Browse this author
Akasaka, Takumi Browse this author
Uemura, Fumihiko Browse this author
Negishi, Junjiro N. Browse this author →KAKEN DB
Nakamura, Futoshi Browse this author →KAKEN DB
Keywords: Food web
Cross-system interaction
Ground beetle
Stable isotope
Issue Date: Jan-2017
Publisher: Springer
Journal Title: Ecological research
Volume: 32
Issue: 1
Start Page: 27
End Page: 35
Publisher DOI: 10.1007/s11284-016-1413-4
Abstract: A variety of organisms mediate river-terrestrial linkages through spatial subsidies. However, most empirical studies have classified organisms rather broadly (e.g., by functional group or taxonomic family) and have dismissed species-level linkages at the interface of ecosystems. Here, we show how allochthonous resource use varies among taxonomically similar species of ground beetles (family Carabidae) across seasons (June-September). We investigated seasonal shifts in the distribution of five beetle species and their dietary responses to spatial subsidies (emerging aquatic insects) in a Japanese braided river. Despite their taxonomic closeness, the ground beetles showed species-specific responses to spatial subsidies, and beetle distribution patterns tended to coincide with their diets. Overall, 1-56% of ground beetle diets were derived from aquatic prey. One genus (Bembidion spp.) mainly consumed aquatic prey, while three species fed primarily on terrestrial prey across all seasons. However, one species (Lithochlaenius noguchii) showed shifts in its diet from aquatic to terrestrial prey according to subsidy availability. The observed variation in allochthonous resource use was likely related to species-specific foraging modes, physiological tolerance to dry conditions, and interspecific competition. Our findings suggest that considering species-specific interactions is necessary to fully understand cross-system interactions and recipient food-web dynamics.
Rights: The final publication is available at
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 照井 慧

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