Seasonal dynamics of a drosophilid (Diptera) assemblage and its potencial as bioindicator in open environments

Iheringia. Série Zoologia

Luís Bizzo²  Marco S Gottschalk¹  Daniela C. De Toni¹  Paulo R. P Hofmann¹ 

[1],Universidade de São Paulo Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto Programa de Pós-Graduação em EntomologiaRibeirão Preto SP ,Brazil

关键词: Drosophila;    seasonality;    bioindicators;    restinga;    Brazil;    Drosophila;    sazonalidade;    bioindicadores;    restinga;    Brasil;   

DOI  :  10.1590/S0073-47212010000300001

来源: SciELO

【 摘 要 】

Drosophila Fallen, 1823 (Diptera, Drosophilidae) is for long a well-established model organism for genetics and evolutionary research. The ecology of these flies, however, has only recently been better studied. Recent papers show that Drosophila assemblies can be used as bioindicators of forested environment degradation. In this work the bioindicator potential of drosophilids was evaluated in a naturally opened environment, a coastal strand-forest (restinga). Data from nine consecutive seasonal collections revealed strong temporal fluctuation pattern of the majority of Drosophila species groups. Drosophila willistoni group was more abundant at autumns, whereas D. cardini and D. tripunctata groups were, respectively, expressive at winters and springs, and D. repleta group at both seasons. The exotic species D. simulans Sturtevant, 1919 (from D. melanogaster group) and Zaprionus indianus Gupta, 1970 were most abundant at summers. Overall, the assemblage structure did not show the same characteristics of forested or urban environments, but was similar to the forests at winters and to cities at summers. This raises the question that this locality may already been under urbanization impact. Also, this can be interpreted as an easily invaded site for exotic species, what might lead to biotic homogenization and therefore can put in check the usage of drosophilid assemblages as bioindicators at open environments.

【 授权许可】

CC BY   
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