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Beta diversity of stream insects differs between boreal and subtropical regions, but land use does not generally cause biotic homogenization

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Autor(es):
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Petsch, Danielle K. [1] ; Saito, Victor S. [2] ; Landeiro, Victor L. [3] ; Silva, Thiago S. F. [4] ; Bini, Luis M. [5] ; Heino, Jani [6] ; Soininen, Janne [7] ; Tolonen, Kimmo T. [6] ; Jyrkankallio-Mikkola, Jenny [7] ; Pajunen, Virpi [7] ; Siqueira, Tadeu [8] ; Melo, Adriano S. [5]
Número total de Autores: 12
Afiliação do(s) autor(es):
[1] Univ Fed Goias, Inst Ciencias Biol, Programa Posgrad Ecol & Evolucao, Ave Esperanca S-N, Terreo Bloco ICB5, Campus Samamb, BR-74690900 Goiania, Go - Brazil
[2] Univ Fed Sao Carlos, Dept Ciencias Ambientais, Rodovia Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Fed Mato Grosso, Inst Biociencias, Dept Bot & Ecol, BR-78060900 Cuiaba, MG - Brazil
[4] Univ Stirling, Fac Nat Sci, Biol & Environm Sci, Stirling FK9 4LA - Scotland
[5] Univ Fed Goias, Inst Ciencias Biol, Dept Ecol, Ave Esperanca S-N, BR-74690900 Goiania, Go - Brazil
[6] Univ Oulu, Finnish Environm Inst, Oulu Off, Freshwater Ctr, POB 413, FI-90014 Oulu - Finland
[7] Univ Helsinki, Dept Geosci & Geog, POB 4, Yliopistonkatu 3, Helsinki 00014 - Finland
[8] Univ Estadual Paulista, Inst Biociencias, UNESP, Ave 24-A 1515 Rio Claro, BR-13506900 Sao Paulo - Brazil
Número total de Afiliações: 8
Tipo de documento: Artigo Científico
Fonte: FRESHWATER SCIENCE; v. 40, n. 1 MAR 2021.
Citações Web of Science: 0
Resumo

Previous studies have found mixed results regarding the relationship between beta diversity and latitude. In addition, by influencing local environmental heterogeneity, land use may modify spatial taxonomic and functional variability among communities causing biotic differentiation or homogenization. We tested 1) whether taxonomic and functional beta diversities among streams within watersheds differ between subtropical and boreal regions and 2) whether land use is related to taxonomic and functional beta diversities in both regions. We sampled aquatic insects in 100 subtropical (Brazil) and 100 boreal (Finland) streams across a wide gradient of land use, including agriculture and exotic planted, secondary, and native forests. We calculated beta diversity at the watershed scale (among 5 streams in each watershed). We found higher taxonomic beta diversity among subtropical than among boreal streams, whereas functional beta diversity was similar between the 2 regions. Total land use was positively correlated with taxonomic and functional beta diversity among subtropical streams, while local environmental heterogeneity was positively correlated with beta diversity among boreal streams. We suggest that different types and intensities of land use may increase among-stream heterogeneity, promoting distinct insect assemblage compositions among streams. Our findings also suggest that beta diversity patterns and their underlying determinants are highly context dependent. (AU)

Processo FAPESP: 13/50424-1 - Scaling biodiversity in tropical and boreal streams: implications for diversity mapping and environmental assessment (ScaleBio)
Beneficiário:Tadeu de Siqueira Barros
Linha de fomento: Auxílio à Pesquisa - Regular