Land-use and flow intermittence influence biodiversitystability relationships across spatial scales: implications for an uncertain future

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dc.contributor.advisorGianuca, Andros Tarouco
dc.contributor.advisorLatteshttp://lattes.cnpq.br/9747367811959611pt_BR
dc.contributor.authorCavalcanti, Victor Rocha Di
dc.contributor.authorLatteshttp://lattes.cnpq.br/6966167809491459pt_BR
dc.contributor.referees1Saito, Victor Satoru
dc.contributor.referees2Silva, Adriano Caliman Ferreira da
dc.date.accessioned2024-08-08T00:16:52Z
dc.date.available2024-08-08T00:16:52Z
dc.date.issued2024-02-26
dc.description.resumoGlobal change and associated increasing anthropogenic pressures on Earth are impacting biodiversity locally, regionally and globally, with negative consequences on the stability of ecosystems. However, the majority of studies on biodiversity-stability relationships have been conducted locally. Only recently it has been proposed that such relationships could become decoupled across spatial scales. Spatial decoupling happens when many local communities are unstable, but they vary asynchronously in space, leading to regional stabilization. Spatial decoupling can thus result in misleading interpretation of local scale stability patterns when the goal is to design regional management strategies. Focusing on multiple metacommunities of French rivers experiencing contrasting levels of flow intermittence, we investigate (i) whether and how land-use influences macroinvertebrate diversity and stability across multiple spatial scales and (ii) whether connectivity loss due to increasing intermittence enhances the relative stabilizing force of spatial asynchrony over local stability, resulting in higher spatial decoupling of diversity-stability relationships. We found that urbanization and agriculture negatively influenced local species diversity and the spatial asynchrony of populations and communities, indirectly reducing the stability of metacommunities through different pathways. However, the significance and strength of those pathways changed depending on the intermittence level and organism group analyzed. Specifically, the diversity of aerial organisms responded strongly to urbanization, whereas the diversity of aquatic species did not. In addition, the relative contribution of spatial asynchrony to regional stability was higher for metacommunities of intermittent than perennial rivers, implying the need to conserve multiple sites to attain regional stability in those systems. Considering that climate change is increasing flow intermittence across river networks, our results suggest that managers need to focus on the spatial dynamics of metacommunities more than on local-scale processes to monitor, restore and conserve freshwater biodiversity.pt_BR
dc.description.sponsorshipFundação Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESpt_BR
dc.identifier.citationCAVALCANTI, Victor Rocha Di. Land-use and flow intermittence influence biodiversitystability relationships across spatial scales: implications for an uncertain future. Orientador: Dr. Andros Tarouco Gianuca. 2024. 72f. Dissertação (Mestrado em Ecologia) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2024.pt_BR
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/59046
dc.languagept_BRpt_BR
dc.publisherUniversidade Federal do Rio Grande do Nortept_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.initialsUFRNpt_BR
dc.publisher.programPROGRAMA DE PÓS-GRADUAÇÃO EM ECOLOGIApt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectBiodiversidadept_BR
dc.subjectEstabilidade regionalpt_BR
dc.subjectIntermitência de fluxopt_BR
dc.subject.cnpqCNPQ::CIENCIAS BIOLOGICAS::ECOLOGIApt_BR
dc.titleLand-use and flow intermittence influence biodiversitystability relationships across spatial scales: implications for an uncertain futurept_BR
dc.typemasterThesispt_BR

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