Busca avançada
Ano de início
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Subtropical streams harbour higher genus richness and lower abundance of insects compared to boreal streams, but scale matters

Texto completo
Mostrar menos -
Heino, Jani [1] ; Melo, Adriano S. [2] ; Jyrkankallio-Mikkola, Jenny [3] ; Petsch, Danielle Katharine [4] ; Saito, Victor Satoru [5] ; Tolonen, Kimmo T. [1, 6] ; Bini, Luis Mauricio [2] ; Landeiro, Victor Lemes [7] ; Freire Silva, Thiago Sanna [8] ; Pajunen, Virpi [3] ; Soininen, Janne [3] ; Siqueira, Tadeu [9]
Número total de Autores: 12
Afiliação do(s) autor(es):
[1] Finnish Environm Inst, Biodivers Ctr, Oulu - Finland
[2] Univ Fed Goias, ICB, Dept Ecol, Goiania, Go - Brazil
[3] Univ Helsinki, Dept Geosci & Geog, Helsinki - Finland
[4] Univ Fed Goias, Programa Posgrad Ecol & Evolucao, Goiania, Go - Brazil
[5] Univ Fed Sao Carlos, Dept Ciencias Ambientais, Sao Carlos, SP - Brazil
[6] Univ Jyvaskyla, Dept Biol & Environm Sci, Jyvaskyla - Finland
[7] Univ Fed Mato Grosso, IB, Dept Bot & Ecol, Cuiaba, MT - Brazil
[8] Univ Estadual Paulista Unesp, Ecosyst Dynam Observ, Inst Geociencias & Ciencias Exatas, Rio Claro - Brazil
[9] Univ Estadual Paulista UNESP, Inst Biociencias, Dept Ecol, Rio Claro - Brazil
Número total de Afiliações: 9
Tipo de documento: Artigo Científico
Fonte: Journal of Biogeography; v. 45, n. 9, p. 1983-1993, SEP 2018.
Citações Web of Science: 6

Aim: Biological diversity typically varies between climatically different regions, and regions closer to the equator often support higher numbers of taxa than those closer to the poles. However, these trends have been assessed for a few organism groups, and the existing studies have rarely been based on extensive identical surveys in different climatic regions. Location: We conducted standardized surveys of wadeable streams in a boreal (western Finland) and a subtropical (south-eastern Brazil) region, sampling insects identically from 100 streams in each region and measuring the same environmental variables in both regions. Taxon: Aquatic insects. Methods: Comparisons were made at the scales of local stream sites, drainage basins and entire regions. We standardized the spatial extent of the study areas by resampling regional richness based on subsets of sites with similar extents. We examined differences in genus richness and assemblage abundance patterns between the regions using graphical and statistical modelling approaches. Results: We found that while genus accumulation and rank-abundance curves were relatively similar at the regional scale between Finland and Brazil, regional genus richness was higher in the latter but regional abundance much higher in the former region. These regional patterns for richness and abundance were reproduced by basin and local genus richness that were higher in Brazil than in Finland, and assemblage abundance that was much higher in Finland than in Brazil. The magnitude of the difference in genus richness between Brazil and Finland tended to increase from local through basin to regional scales. Main conclusions: Our findings suggest that factors related to evolutionary diversification might explain differences in genus richness between these two climatically different regions, whereas higher nutrient concentrations of stream waters might explain the higher abundance of insects in Finland than in Brazil. (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