Shoreline bank construction modifies benthic–pelagic coupling of food webs |
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| Authors: | Hideyuki Doi Kwang-Hyeon Chang Takamitsu Ando Hiroyuki Imai Shin-ichi Nakano |
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| Institution: | 1. LAFWEDY, Faculty of Agriculture, Ehime University, 3-5-7, Tarumi, Matsuyama 790-8566, Ehime, Japan;2. Institute for Chemistry and Biology of the Marine Environment, Carl-von-Ossietzky University Oldenburg, Schleusenstrasse 1, 26382 Wilhelmshaven, Germany;3. Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan;4. Center for Ecological Research, Kyoto University, 509-3, 2-chome, Hirano, Otsu, Shiga 520-2113, Japan;1. National Research Nuclear University (MEPhI), 31 Kashirskoe Shosse, Moscow 115409, Russian Federation;2. Troitsk Institute for Innovations and Fusion Research, Troitsk 142190, Russian Federation;1. Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan;2. Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan;3. Department of Infectious Diseases, Kanazawa Medical University, Ishikawa, Japan;1. Center for Genetic Engineering and Biotechnology, P.O. Box 6162, Havana 10600, Cuba;2. Tobacco Research Institute, Carretera de Tumbadero 8, P.O. Box 6063, San Antonio de los Baños, Havana, Cuba;3. Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003, Japan;4. Gene Research Center, Shinshu University, Ueda 386-8567, Japan;5. Department of Biology, University of Fribourg, Fribourg, Switzerland;1. Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;2. Department of Neurology, Kyoto University, Kyoto 606-8501, Japan;3. Department of System Neuroscience, Sapporo Medical University, Hokkaido 060-8556, Japan;4. Takeda General Hospital, Kyoto 601-1495, Japan;5. Research Institute of Systems Control, Institute for Advanced Research and Education, Saga University, Saga 840-0047, Japan |
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| Abstract: | Management of the food web is important in maintaining ecosystem functions; however, the studies to assess anthropogenic impact on food web structures are very limited. Recently, shoreline development is considered to impact the littoral zone of lakes through loss of littoral habitats. Shoreline engineering would consequently modify the food web structure and coupling between benthic and pelagic habitats. Thus, we investigated whether lakeshore modification would change benthic–pelagic coupling by largemouth bass in 15 ponds, which differed in the proportion of concrete bank modification. We performed isotope mixing models to estimate benthic contribution to the fish species and tested the relationships with environmental factors including proportion of bank modification by general linear models. These results showed that the benthic contribution to largemouth bass was strongly related to the proportion of anthropogenic shoreline modification, while for bluegill sunfish, the benthic contribution was not changed with anthropogenic shoreline modification. Therefore, anthropogenic modification of shoreline strongly modified the food webs in ponds through the littoral habitat modification. The results suggested that we should pay attention to the anthropogenic impact on food web structures to maintain ecosystems. |
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