{"doi":"10.1111/eff.12425","title":"High intraspecific variability in morphology and diet in tropical stream fish communities","abstract":"<jats:title>Abstract</jats:title><jats:p>Functional diversity of fish communities has been measured according to (a) interspecific variability, assuming that intraspecific variability is negligible, or (b) morphological differences, as good descriptors of complex functions, such as diet. These two assumptions have been scarcely tested on the individual level, especially in species‐rich tropical ecosystems. Here, we adapted intraspecific specialisation (<jats:italic><jats:styled-content style=\"fixed-case\">IS</jats:styled-content>pe</jats:italic>) and intraspecific originality indices (<jats:italic><jats:styled-content style=\"fixed-case\">IO</jats:styled-content>ri</jats:italic>) to assess complementary components of intraspecific variability. Next, we applied these indices to evaluate the intra‐ and interspecific variability of morphological and diet traits in two contrasting Brazilian stream‐dwelling fish assemblages (rainforest and savannah). We also compared correlations between morphology and diet at the individual and species level to test whether accounting for intraspecific variability increases the predictability of diet due to morphological differences. Significant contributions of intraspecific variability to differences between fish were revealed for morphology and diet. Intraspecific variability in the diet was higher than that in morphology in both assemblages. The <jats:italic><jats:styled-content style=\"fixed-case\">IS</jats:styled-content>pe</jats:italic> was positively correlated to <jats:italic><jats:styled-content style=\"fixed-case\">IO</jats:styled-content>ri</jats:italic> in the diet of both ecosystems. The morphological–dietary relationships were significant but weak at both individual and species levels. Our findings highlight the importance of measuring individual variability and accounting for complementary components of the intraspecific variability (<jats:italic><jats:styled-content style=\"fixed-case\">IS</jats:styled-content>pe</jats:italic> and <jats:italic><jats:styled-content style=\"fixed-case\">IO</jats:styled-content>ri</jats:italic>). Importantly, we showed that the variability in morphology does not predict diet variability at both intra‐ and interspecific levels. Thus, high intraspecific variability in morphology and diet challenges the use of functional traits measured at the species level to describe the functional diversity of different fish assemblages.</jats:p>","journal":"Ecology of Freshwater Fish","year":2019,"id":37585,"datarank":0.9172182524944417,"base_score":3.5263605246161616,"endowment":3.5263605246161616,"self_citation_contribution":0.5289540786924243,"citation_network_contribution":0.3882641738020174,"self_endowment_contribution":0.5289540786924243,"citer_contribution":0.3882641738020174,"corpus_percentile":null,"corpus_rank":null,"citation_count":33,"citer_count":22,"citers_with_citation_signal":17,"citers_with_endowment":17,"datacite_reuse_total":2,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":188051,"name":"Sébastien Villéger","orcid":null,"position":1,"is_corresponding":false},{"id":188052,"name":"Carla Ferreira Rezende","orcid":null,"position":2,"is_corresponding":false},{"id":188053,"name":"Rosana Mazzoni","orcid":null,"position":3,"is_corresponding":false},{"id":188050,"name":"Luisa Resende Manna","orcid":"0000-0003-4223-8466","position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":3.5263605246161616,"endowment":3.5263605246161616,"datacite_reuse_total":2,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"18998881","pmcid":null,"openalex_id":"https://openalex.org/W2811459610","authors":[],"funders":[{"funder_name":"Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro","grant_id":"E‐26/202.782/2016","title":null},{"funder_name":"Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro","grant_id":"E‐26/202.783/2016","title":null},{"funder_name":"Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro","grant_id":"E‐26/203.193/2015","title":null},{"funder_name":"Coordenação de Aperfeiçoamento de Pessoal de Nível Superior","grant_id":"BEX 0152/14‐5","title":null},{"funder_name":"Conselho Nacional de Desenvolvimento Científico e Tecnológico","grant_id":"PQ CNPQ 311621/2013‐6","title":null},{"funder_name":"Conselho Nacional de Desenvolvimento Científico e Tecnológico","grant_id":"PQ CNPQ 311627/2015‐3","title":null}],"total_grants":6,"fwci":2.2961,"citation_percentile":0.87502386,"influential_citations":1,"citation_trend":[{"year":2020,"count":2},{"year":2021,"count":6},{"year":2022,"count":4},{"year":2023,"count":8},{"year":2024,"count":4},{"year":2025,"count":8},{"year":2026,"count":1}],"oa_status":"closed","license":"http://onlinelibrary.wiley.com/termsAndConditions#vor","oa_locations":[{"url":"https://onlinelibrary.wiley.com/doi/pdfdirect/10.1111/eff.12425","host_type":"BRONZE"},{"url":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12425","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12425","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/full-xml/10.1111/eff.12425","host_type":"publisher"},{"url":"https://doi.org/10.1111/eff.12425","host_type":"journal"},{"url":"https://hal.umontpellier.fr/hal-01994129","host_type":"repository"}],"fields_of_study":["Fish biology, ecology, and behavior","Fish Ecology and Management Studies","Fish Biology and Ecology Studies","Biology","Environmental Science"],"mesh_terms":[],"keywords":["Intraspecific competition","Interspecific competition","Biology","Ecology","Ecosystem","Morphology (biology)","Zoology"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Life in Land"}],"linked_datasets":[{"doi":"10.6084/m9.figshare.22602586.v1","title":"Additional file 1 of Unraveling the importance of functionally extreme tadpole types to functional diversity: a case study in temperate montane streams","publisher":"figshare","resource_type":"JournalArticle"},{"doi":"10.6084/m9.figshare.22602586","title":"Additional file 1 of Unraveling the importance of functionally extreme tadpole types to functional diversity: a case study in temperate montane 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