Manmade barriers drive temporal and spatial trends of genetic diversity and effective population size in a riverine fish

Manmade barriers drive temporal and spatial trends of genetic diversity and effective population size in a riverine fish | 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 Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 9 January 2025 V1 Latest version Share on Manmade barriers drive temporal and spatial trends of genetic diversity and effective population size in a riverine fish Authors : Megan Osborne 0000-0002-0978-2905 [email protected] , Guilherme Caeiro-Dias 0000-0002-5771-6208 , and Thomas Turner Authors Info & Affiliations https://doi.org/10.22541/au.173640622.26831605/v1 240 views 206 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Man-made structures, and habitat changes they impose, affect how fish are able to move up and downstream, between the channel and floodplain, and from habitats with unfavorable abiotic conditions to those that promote survival and reproductive output. Here we show that unidirectional stream-flow and dams affect patterns of effective population size (Ne) and genetic diversity in Rio Grande silvery minnow; a species with buoyant eggs that drift with river flow. We used archived DNA from 25 annual collections and targeted amplicon sequencing to test several predictions including that Ne and genetic diversity would be reduced upstream and increase in downstream reaches, and that augmentation and upstream stocking would disrupt these patterns. We found that Ne is reduced in the upstream-most reach and that there is a strong correlation between Ne in this reach and range-wide Ne suggesting that processes that act to reduce Ne and genetic diversity upstream, have a disproportionate impact on the population as a whole. In the absence of population augmentation, allelic diversity was reduced upstream and stocking with captive reared fishes in this reach restored diversity while other reach-specific patterns persisted despite augmentation. Up- to downstream trends in diversity and Ne imply that there is no longer sufficient spawning and retention in the natal reach to maintain large Ne and diversity is eroded through genetic drift. Movement of juveniles and adults and ongoing stocking may be insufficient to replenish depleted populations, maintain large Ne and genetic diversity. These results underscore a need for fish passage and habitat restoration promoting egg/larval retention. Supplementary Material File (gtseq_rgsm_me_1_6_25.doc) Download 10.47 MB Information & Authors Information Version history V1 Version 1 09 January 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords conservation genetics contemporary evolution fish inbreeding population genetics - empirical Authors Affiliations Megan Osborne 0000-0002-0978-2905 [email protected] University of New Mexico View all articles by this author Guilherme Caeiro-Dias 0000-0002-5771-6208 University of New Mexico View all articles by this author Thomas Turner The University of New Mexico - Albuquerque View all articles by this author Metrics & Citations Metrics Article Usage 240 views 206 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Megan Osborne, Guilherme Caeiro-Dias, Thomas Turner. Manmade barriers drive temporal and spatial trends of genetic diversity and effective population size in a riverine fish. Authorea . 09 January 2025. DOI: https://doi.org/10.22541/au.173640622.26831605/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 . Format Please select one from the list RIS (ProCite, Reference Manager) EndNote BibTex Medlars RefWorks Direct import Tips for downloading citations document.getElementById('citMgrHelpLink').addEventListener('click', function() { popupHelp(this.href); return false; }); $(".js__slcInclude").on("change", function(e){ if ($(this).val() == 'refworks') $('#direct').prop("checked", false); $('#direct').prop("disabled", ($(this).val() == 'refworks')); }); Cited by Guilherme Caeiro-Dias, Megan J. Osborne, Thomas F. Turner, Time is of the essence: using archived samples in the development of a GT-seq panel to preserve continuity of ongoing genetic monitoring, PeerJ, 14 , (e20726), (2026). https://doi.org/10.7717/peerj.20726 Crossref Loading... 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