Benthic trophic networks of the southern North Sea: contrasting soft-sediment communities share high food web similarity
| Autor: | Benoit Lebreton, Hendrik Pehlke, Thomas Brey, Jan Steger, Jennifer Dannheim |
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| Přispěvatelé: | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Carl Von Ossietzky Universität Oldenburg, LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Trophic links Food web structure Amphiura filiformis community Aquatic Science 010603 evolutionary biology 01 natural sciences 14. Life underwater Contrasting sediments Amphiura filiformis Ecology Evolution Behavior and Systematics ComputingMilieux_MISCELLANEOUS Trophic level Isotope analysis Stable isotopes Ecology biology Consumer 010604 marine biology & hydrobiology Detritivore Bathyporeia−Tellina community biology.organism_classification Food web Benthic zone Guild [SDE]Environmental Sciences |
| Zdroj: | Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2019, 628, pp.17-36. ⟨10.3354/meps13069⟩ |
| ISSN: | 0171-8630 1616-1599 |
| Popis: | We examined whether taxonomically distinct benthic communities from contrasting sediments in the German Bight (southern North Sea) also differ in their trophic structure. As a case study, we compared the Amphiura filiformis community (AFC) of silty sands and the Bathyporeia− Tellina community (BTC) of fine sands using a combination of stable isotope analysis and data on trophic interactions. Differences between the food webs were evident in the feeding guild compo� sition of important primary consumers: deposit and interface feeders are the most diverse primary consumer guilds in the AFC, whereas suspension and interface feeders play a major role in the BTC, reflecting differences in physical properties and food availability at the sediment−water interface. While all primary consumer guilds had the same trophic level (TL) in the AFC, deposit feeders of the BTC occupied a trophic position intermediate between other primary and higher� order consumer guilds, likely explained by partially incomplete knowledge of their trophic eco - logy and selective feeding, including the ingestion of meiofauna. Most food web properties, how�ever, were similar between the AFC and BTC: they mainly depend on pelagic primary production, reach TL 4 and are characterized by a prevalence of generalist higher-order consumers. Further� more, both trophic networks had similar linkage densities and high directed connectance, the lat�ter feature suggesting considerable food web robustness. Our findings suggest that although com�munities in the German Bight differ in some aspects of their trophic structure, they share a similar food web topology, indicating a comparable degree of resilience towards natural and anthro�pogenic disturbances. |
| Databáze: | OpenAIRE |
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