In:
PLOS ONE, Public Library of Science (PLoS), Vol. 17, No. 9 ( 2022-9-22), p. e0273765-
Abstract:
Estuarine fish assemblages are often sensitive to environmental conditions, because fluctuation in physico-chemical conditions at different spatial and seasonal scales can directly influence species distributions. In this way, we conducted a field survey to investigate the role of estuarine gradient (environmental heterogeneity) in fish α and β diversity. The study was carried out in three zones in Mamanguape River estuary according to salinity and geomorphology features during an atypical climatic event in 2015. In total, 18,084 specimens of 125 species were captured. Additive partitioning of diversity analysis detected a higher proportion of beta diversity among estuarine zones during the rainy (β 3 = 58.6%) and dry season (β 3 = 40.94%) and were higher than expected by chance (Prop exp 〉 obs 〈 0.001). Decomposing β-diversity analysis showed that total β-diversity (β sor ) results were more dominated by species turnover (β sim ) than nestedness (β nes ) in both seasons. Forward selection procedure and db-RDA identified salinity, coarse sand and chlorophyll- a as the main environmental variables influencing β sor and site distance from estuary mouth and split as the main landscape variables. Variation partitioning analysis revealed more contribution to the pure fraction of environmental variables to fish species turnover, however, both pure fraction of environmental and landscape variables significantly contributed to β sim . Our study highlighted the importance to environmental heterogeneity and connectivity to promote fish diversity across the Mamanguape River estuary. Thus, future conservation policies should focus on maintaining these two components to guarantee its nursery ground role to estuarine fish assemblages.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0273765
DOI:
10.1371/journal.pone.0273765.g001
DOI:
10.1371/journal.pone.0273765.g002
DOI:
10.1371/journal.pone.0273765.g003
DOI:
10.1371/journal.pone.0273765.g004
DOI:
10.1371/journal.pone.0273765.g005
DOI:
10.1371/journal.pone.0273765.t001
DOI:
10.1371/journal.pone.0273765.t002
DOI:
10.1371/journal.pone.0273765.t003
DOI:
10.1371/journal.pone.0273765.s001
DOI:
10.1371/journal.pone.0273765.s002
DOI:
10.1371/journal.pone.0273765.s003
DOI:
10.1371/journal.pone.0273765.r001
DOI:
10.1371/journal.pone.0273765.r002
DOI:
10.1371/journal.pone.0273765.r003
DOI:
10.1371/journal.pone.0273765.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2022
detail.hit.zdb_id:
2267670-3
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