Macrophytes shape trophic niche variation among generalist fishes
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...
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| creator | Vejříková, Ivana Eloranta, Antti P Vejřík, Lukáš Šmejkal, Marek Čech, Martin Sajdlová, Zuzana Frouzová, Jaroslava Kiljunen, Mikko Peterka, Jiří |
| description | 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 (δ15N) and carbon (δ13C) 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, and hence the overall food-web structures in lake ecosystems. |
| doi_str_mv | 10.1371/journal.pone.0177114 |
| format | Article |
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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 (δ15N) and carbon (δ13C) 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, and hence the overall food-web structures in lake ecosystems.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0177114</identifier><identifier>PMID: 28486550</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Abundance ; Animals ; Aquatic ecosystems ; Aquatic plants ; Biodiversity ; Biological effects ; Biology and Life Sciences ; Carbon 13 ; Complexity ; Earth Sciences ; Ecology and Environmental Sciences ; Ecosystem ; Ecosystems ; Environmental aspects ; Fish ; Fishes ; Food Chain ; Food chains ; Food resources ; Food webs ; Habitats ; Herbivory ; Hypotheses ; Lakes ; Littoral environments ; Littoral zone ; Macrophytes ; Medicine and Health Sciences ; Niches ; Nitrogen Isotopes - analysis ; Ontogeny ; Plants ; Predation ; Prey ; Shelters ; Succession ; Trophic levels ; Vegetation ; Zooplankton</subject><ispartof>PloS one, 2017-05, Vol.12 (5), p.e0177114-e0177114</ispartof><rights>COPYRIGHT 2017 Public Library of Science</rights><rights>2017 Vejříková et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2017 Vejříková et al 2017 Vejříková et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c692t-1765220be48ee0a19a0cd57363f85da5333bded810084bbc0bc382679186457a3</citedby><cites>FETCH-LOGICAL-c692t-1765220be48ee0a19a0cd57363f85da5333bded810084bbc0bc382679186457a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5423621/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5423621/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,2100,2926,23865,27923,27924,53790,53792,79371,79372</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28486550$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Lötters, Stefan</contributor><creatorcontrib>Vejříková, Ivana</creatorcontrib><creatorcontrib>Eloranta, Antti P</creatorcontrib><creatorcontrib>Vejřík, Lukáš</creatorcontrib><creatorcontrib>Šmejkal, Marek</creatorcontrib><creatorcontrib>Čech, Martin</creatorcontrib><creatorcontrib>Sajdlová, Zuzana</creatorcontrib><creatorcontrib>Frouzová, Jaroslava</creatorcontrib><creatorcontrib>Kiljunen, Mikko</creatorcontrib><creatorcontrib>Peterka, Jiří</creatorcontrib><title>Macrophytes shape trophic niche variation among generalist fishes</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>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. 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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. 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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, and hence the overall food-web structures in lake ecosystems.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>28486550</pmid><doi>10.1371/journal.pone.0177114</doi><tpages>e0177114</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 1932-6203 |
| ispartof | PloS one, 2017-05, Vol.12 (5), p.e0177114-e0177114 |
| issn | 1932-6203 1932-6203 |
| language | eng |
| recordid | cdi_plos_journals_1896839050 |
| source | MEDLINE; DOAJ Directory of Open Access Journals; Public Library of Science (PLoS); EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Abundance Animals Aquatic ecosystems Aquatic plants Biodiversity Biological effects Biology and Life Sciences Carbon 13 Complexity Earth Sciences Ecology and Environmental Sciences Ecosystem Ecosystems Environmental aspects Fish Fishes Food Chain Food chains Food resources Food webs Habitats Herbivory Hypotheses Lakes Littoral environments Littoral zone Macrophytes Medicine and Health Sciences Niches Nitrogen Isotopes - analysis Ontogeny Plants Predation Prey Shelters Succession Trophic levels Vegetation Zooplankton |
| title | Macrophytes shape trophic niche variation among generalist fishes |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-11T14%3A37%3A23IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Macrophytes%20shape%20trophic%20niche%20variation%20among%20generalist%20fishes&rft.jtitle=PloS%20one&rft.au=Vej%C5%99%C3%ADkov%C3%A1,%20Ivana&rft.date=2017-05-09&rft.volume=12&rft.issue=5&rft.spage=e0177114&rft.epage=e0177114&rft.pages=e0177114-e0177114&rft.issn=1932-6203&rft.eissn=1932-6203&rft_id=info:doi/10.1371/journal.pone.0177114&rft_dat=%3Cgale_plos_%3EA491343638%3C/gale_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1896839050&rft_id=info:pmid/28486550&rft_galeid=A491343638&rft_doaj_id=oai_doaj_org_article_1ed0de037c7b45089a2b6a94aaff1db8&rfr_iscdi=true |