Using food network unfolding to evaluate food–web complexity in terms of biodiversity: theory and applications

Yoshikazu Kato, Michio Kondoh, Naoto F. Ishikawa, Hiroyuki Togashi, Yukihiro Kohmatsu, Mayumi Yoshimura, Chikage Yoshimizu, Takashi F. Haraguchi, Yutaka Osada, Nobuhito Ohte, Naoko Tokuchi, Noboru Okuda, Takeshi Miki, Ichiro Tayasu

研究成果: Letter

3 引用 (Scopus)

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Food–web complexity often hinders disentangling functionally relevant aspects of food–web structure and its relationships to biodiversity. Here, we present a theoretical framework to evaluate food–web complexity in terms of biodiversity. Food network unfolding is a theoretical method to transform a complex food web into a linear food chain based on ecosystem processes. Based on this method, we can define three biodiversity indices, horizontal diversity (DH), vertical diversity (DV) and range diversity (DR), which are associated with the species diversity within each trophic level, diversity of trophic levels, and diversity in resource use, respectively. These indices are related to Shannon's diversity index (H′), where H′ = DH + DV − DR. Application of the framework to three riverine macroinvertebrate communities revealed that D indices, calculated from biomass and stable isotope features, captured well the anthropogenic, seasonal, or other within-site changes in food–web structures that could not be captured with H′ alone.

元の言語English
ページ(範囲)1065-1074
ページ数10
ジャーナルEcology Letters
21
発行部数7
DOI
出版物ステータスPublished - 2018 7

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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    Kato, Y., Kondoh, M., Ishikawa, N. F., Togashi, H., Kohmatsu, Y., Yoshimura, M., Yoshimizu, C., Haraguchi, T. F., Osada, Y., Ohte, N., Tokuchi, N., Okuda, N., Miki, T., & Tayasu, I. (2018). Using food network unfolding to evaluate food–web complexity in terms of biodiversity: theory and applications. Ecology Letters, 21(7), 1065-1074. https://doi.org/10.1111/ele.12973