Changes in algal communities in different habitats and environmental variables during an atypical drought period in a marginal lake to a river

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dc.contributor.authorFerragut, Carla
dc.contributor.authorCasartelli, Mayara Ribeiro
dc.contributor.authordos Santos, Thiago Rodrigues
dc.contributor.authorHenry, Raoul [UNESP]
dc.contributor.institutionInstituto de Pesquisas Ambientais
dc.contributor.institutionUniversidade Federal do Amazonas
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T16:06:28Z
dc.date.available2023-07-29T16:06:28Z
dc.date.issued2023-04-01
dc.description.abstractClimate change is changing the duration and intensity of dry and rainy periods, influencing the dynamics of algal communities in freshwater ecosystems. We evaluated the phytoplankton, metaphyton, epipelon, and epiphyton chlorophyll-a in a shallow marginal lake during a prolonged drought with a loss of river–lake connectivity in an artificial wetland system. We relate algal chlorophyll-a changes in different habitats to environmental conditions during the gradual lake volume reduction. Water and algal community samplings were performed monthly in pelagic, sublittoral, and eulittoral zones during a severe drought due to low rainfall in the summer. We used the chlorophyll-a concentration as a proxy for algal biomass. Differences in nutrient concentrations, water transparency, and depth were determined for two limnological phases. TP and light were significant predictors of algal chlorophyll-a. Lake volume continuously decreased and lost connectivity with the river. The drought increased the trophy, evidencing the tenuous threshold between mesotrophy and eutrophy in a subtropical lake. On a temporal scale, we observed the loss of chlorophyll-a in phytoplankton and epiphyton. The chlorophyll-a concentration fluctuated in the epipelon and increased in phytoplankton-metaphyton, especially in the eulittoral. The results showed a close connection between the pelagic and littoral zones. The phenomena that affect the morphometric variables, such as changes in the precipitation regime, can change trophic state lakes and algal community dynamics in marginal lakes. Our findings suggest that mesotrophic marginal lakes can become eutrophic due to the loss of river–lake connectivity, favoring high phytoplankton-metaphyton growth in wetland systems.en
dc.description.affiliationNúcleo de Biodiversidade e Conservação Instituto de Pesquisas Ambientais, SP
dc.description.affiliationUniversidade Federal do Amazonas, Amazônia
dc.description.affiliationDepartamento de Zoologia Instituto de Biociências Universidade Estadual Paulista, SP
dc.description.affiliationUnespDepartamento de Zoologia Instituto de Biociências Universidade Estadual Paulista, SP
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2009/52253-4
dc.description.sponsorshipIdFAPESP: 2013/03130-2
dc.format.extent213-227
dc.identifierhttp://dx.doi.org/10.1007/s11273-023-09912-9
dc.identifier.citationWetlands Ecology and Management, v. 31, n. 2, p. 213-227, 2023.
dc.identifier.doi10.1007/s11273-023-09912-9
dc.identifier.issn1572-9834
dc.identifier.issn0923-4861
dc.identifier.scopus2-s2.0-85148636826
dc.identifier.urihttp://hdl.handle.net/11449/249684
dc.language.isoeng
dc.relation.ispartofWetlands Ecology and Management
dc.sourceScopus
dc.subjectChlorophyll-a
dc.subjectEpipelon
dc.subjectEpiphyton
dc.subjectLittoral and pelagic zones
dc.subjectMetaphyton
dc.subjectOxbow lake
dc.subjectPhytoplankton
dc.titleChanges in algal communities in different habitats and environmental variables during an atypical drought period in a marginal lake to a riveren
dc.typeArtigo
unesp.author.orcid0000-0002-4313-1436[1]

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