Data/hora: 02/06/2024 13:10:01

Provedor de dados: | 103
País: | Brazil
Título: | Temporal variations of Collembola (Arthropoda: Hexapoda) in the semiarid Caatinga in northeastern Brazil
Autores: | Ferreira,Aila Soares; Bellini,Bruno Cavalcante; Vasconcellos,Alexandre.
Data: | 2013-12-01
Ano: | 2013
Palavras-chave: | Abundance; Climatic variables; Edaphic fauna; Seasonality; Species richness.
Resumo: | The richness and abundance of Collembola species can be influenced by many biotic and abiotic factors, mainly humidity. The semiarid region of Brazil is dominated by Caatinga dryland vegetation which experiences distinct seasonal alterations of its physiognomy linked to regional rainfall regimes. The present study evaluated the environmental factors affecting populations of Collembola in an area of Caatinga vegetation in Northeastern Brazil during a 12-months period. Specimens were collected by active searching in ten 20 x 20 m plots, with a sampling effort of 1 hour/person/plot. A total of 1231 specimens were collected, comprising 15 morphospecies, 12 genera, and nine families. Both species richness and individual abundances demonstrated oscillations during the year, with the highest values occurring during the rainy season; rainfall was the principal predictive variable for the observed temporal oscillations. Minimum temperatures and precipitation influenced the structural composition of the Collembola. Populations of Collembola demonstrated clustered distribution during the year. The direct and indirect effects of precipitation on the quality of microhabitats and resource availability were apparently responsible for the numerical and compositional alterations of the Collembola fauna observed in the Caatinga site.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000600008
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-46702013005000009
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.30 n.6 2013
Fonte: | info:eu-repo/semantics/openAccess