Local environmental variables predict fish species richness and composition in sand beaches of a Neotropical River

Local environmental variables predict fish species richness and composition in sand beaches of a Neotropical River | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL River Research and Applications This is a preprint and has not been peer reviewed. Data may be preliminary. 7 May 2025 V1 Latest version Share on Local environmental variables predict fish species richness and composition in sand beaches of a Neotropical River Authors : Ronaldo Souza da Silva , Jean Ortega , Lucas Pires de Oliveira 0000-0003-3784-5149 [email protected] , Vinicius Guerra Batista 0000-0003-1912-1139 , Werther Pereira Ramalho , Fabiano Corrêa , Mariana Costa Fratari , Lisandro Juno Soares Vieira , and Luciano Montag Authors Info & Affiliations https://doi.org/10.22541/au.174659969.99873089/v1 Published River Research and Applications Version of record Peer review timeline 319 views 223 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Local and regional species diversity is influenced by historical factors, resource availability, biotic interactions, the presence of resources, and adequate environmental conditions. This study investigated the influence of local environmental variables such as temperature, depth, turbidity, and dissolved oxygen on fish richness and composition along the beaches of the Acre River in Brazil. The sampling period extended from June to September 2017, encompassing 31 sandy beaches. A comprehensive collection effort yielded 15,627 individuals representing 60 distinct fish species. The PCA indicated that beaches located in the upper part of the river tended to have higher pH, current speed, and shallower depth, while the lower part had greater length, warmer waters, and greater concentration dissolved oxygen. There was a trend towards lower species richness in the upper part and greater richness in intermediate portions of the Acre River. Multiple regression indicated that only water temperature influenced positively the variation in fish species richness as predicted by the energy-environment hypothesis. Also, water temperature, concentration of dissolved oxygen, and depth were essential to determine changes in species composition. Therefore, local environmental variables, especially the water temperature, are important factors in determining the fish richness and variation in species composition on sandy beaches of the Acre River. Supplementary Material File (local environmental variables predict fish species richness and composition.docx) Download 5.25 MB Information & Authors Information Version history V1 Version 1 07 May 2025 Peer review timeline Published River Research and Applications Version of Record 4 Aug 2025 Published Copyright This work is licensed under a Non Exclusive No Reuse License. Collection River Research and Applications Keywords acre river amazon community structure diversity ichthyofauna species composition Authors Affiliations Ronaldo Souza da Silva Secretaria do Estado da Educação do Tocantins View all articles by this author Jean Ortega Agriculture and Food Development Authority View all articles by this author Lucas Pires de Oliveira 0000-0003-3784-5149 [email protected] Universidade Federal do Pará View all articles by this author Vinicius Guerra Batista 0000-0003-1912-1139 Faculdade Una Itumbiara View all articles by this author Werther Pereira Ramalho Instituto Boitatá de Etnobiologia e Conservação da Fauna View all articles by this author Fabiano Corrêa Universidade Estadual do Maranhão View all articles by this author Mariana Costa Fratari Universidade Federal do Acre View all articles by this author Lisandro Juno Soares Vieira Universidade Federal do Acre View all articles by this author Luciano Montag Universidade Federal do Pará View all articles by this author Metrics & Citations Metrics Article Usage 319 views 223 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Ronaldo Souza da Silva, Jean Ortega, Lucas Pires de Oliveira, et al. Local environmental variables predict fish species richness and composition in sand beaches of a Neotropical River. Authorea . 07 May 2025. DOI: https://doi.org/10.22541/au.174659969.99873089/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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