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Macrophytes shape trophic niche variation among generalist fishes
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SYSNO ASEP 0479890 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Macrophytes shape trophic niche variation among generalist fishes Author(s) Vejříková, Ivana (BC-A) RID, ORCID
Eloranta, A. P. (NO)
Vejřík, Lukáš (BC-A) RID, ORCID
Šmejkal, Marek (BC-A) RID, ORCID
Čech, Martin (BC-A) RID, ORCID
Sajdlová, Zuzana (BC-A) RID, ORCID
Frouzová, Jaroslava (BC-A) RID, ORCID
Kiljunen, M. (FI)
Peterka, Jiří (BC-A) RID, ORCIDNumber of authors 9 Article number e0177114 Source Title PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 12, č. 5 (2017)Number of pages 13 s. Language eng - English Country US - United States Keywords roach Rutilus rutilus ; perch Perca fluviatilis ; Scardinius erythrophthalmus ; stable-isotopes Subject RIV EH - Ecology, Behaviour OECD category Ecology R&D Projects EE2.3.20.0204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 7F14316 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015075 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support BC-A - RVO:60077344 UT WOS 000401314000046 EID SCOPUS 85019017646 DOI 10.1371/journal.pone.0177114 Annotation Generalist species commonly have a fundamental role in ecosystems as they can integrate spatially distinct habitats and food-web compartments, as well as control the composition, abundance and behavior of organisms at different trophic levels. Generalist populations typically consist of specialized individuals, but the potential for and hence degree of individual niche variation can be largely determined by habitat complexity. We compared individual niche variation within three generalist fishes between two comparable lakes in the Czech Republic differing in macrophyte cover, i.e. macrophyte-rich Milada and macrophyte-poor Most. We tested the hypothesis that large individual niche variation among generalist fishes is facilitated by the presence of macrophytes,which provides niches and predation shelter for fish and their prey items. Based on results from stable nitrogen (delta N-15) and carbon (delta C-13) isotopic mixing models, perch (Perca fluviatilis L.) and rudd (Scardinius erythrophthalmus (L.)) showed larger individual variation (i.e., variance) in trophic position in Milada as compared to Most, whereas no significant between-lake differences were observed for roach (Rutilus rutilus (L.)). Contrary to our hypothesis, all the three species showed significantly lower individual variation in the relative reliance on littoral food resources in Milada than in Most. Rudd relied significantly more whereas perch and roach relied less on littoral food resources in Milada than in Most, likely due to prevalent herbivory by rudd and prevalent zooplanktivory by perch and roach in the macrophyte-rich Milada as compared to macrophyte-poor Most. Our study demonstrates how the succession of macrophyte vegetation, via its effects on the physical and biological complexity of the littoral zone and on the availability of small prey fish and zooplankton, can strongly influence individual niche variation among generalist fishes with different ontogenetic trajectories. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2018
Number of the records: 1