Seasonal variation in natural populations of Drosophila spp. (Diptera) in two woodlands in the State of São Paulo, Brazil

Iheringia. Série Zoologia

Felipe Rafael Torres¹  Lilian Madi-ravazzi¹ 

[1],Universidade Estadual Paulista Instituto de Biociências, Letras e Ciências Exatas Departamento de BiologiaSão José do Rio Preto SP ,Brasil

关键词: Brazil;    abiotic factors;    seasonality;    Drosophila;    biodiversity;    Brasil;    fatores abióticos;    sazonalidade;    Drosophila;    biodiversidade;   

DOI  :  10.1590/S0073-47212006000400008

来源: SciELO

【 摘 要 】

The composition and the seasonality of the natural populations of Drosophila species in relation to the climatic variables temperature and rainfall were analyzed from September 1998 through October 1999 by monthly collections, in two woodlands in the Northwest of the State of São Paulo, Brazil. The diversity dominance component curves were inclined, reflecting low diversity and high dominance of few species. Among the 25 species recorded, Drosophila sturtevanti Duda, 1927 was the most frequent and abundant. On the opposite to data in literature, D. paranaensis Barros, 1950 abundance and frequency were greater than those from D. mercatorum Patterson & Wheeler, 1942. A positive correlation between abundance and rainfall was observed for D. nebulosa Sturtevant, 1916. These data are indicative of changes in the populations structure due to new adaptive strategies arised in response to environmental modifications.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License