Species and weather influence on Chrysomelidae populations / Levantamento das espécies e influência de variáveis climáticas sobre populações de Chrysomelidae

AUTOR(ES)

Dinarte Gonçalves

DATA DE PUBLICAÇÃO

2008

RESUMO

Chrysomelidae is one of the most important families in the Coleoptera order. Currently, it is estimated that from 35,000 to 50,000 chrysomelid species are known. They are known as leaf beetles which may be important forest regulation factors. The aim of this research was to identify Chrysomelidae taxa at the Estação de Pesquisa, Treinamento e Educação Ambiental Mata do Paraiso (EPTEAMP) in Viçosa, Minas Gerais State, Brazil, and to study relationships between temperature, relative humidity and rainfall on the species richness and leaf beetles number, and to identify population dynamics related to the rainy and dry periods. A traditional light trap was weekly used for insects collecting during January 1981 to November 2007. All 610 collected chrysomelid beetles were used for taxa determinations. They are represented by 113 species, 62 genus, seven tribes and three subfamilies. Thirty-four genus and thirty-six species are new records for Minas Gerais State; thirty-six genus and forty-two species are new records for Viçosa Region. Species number was higher than other studies carried out for the same subfamilies. EPTEAMP is a Semi-deciduous Seasonal Forest fragment of the Atlantic Rain Forest, then it deserves attention because these news records increase information about the geographic distribution of registered taxa. Relative humidity did not affect species number neither chrysomelid adults, but rain amount and temperature level affected the population dynamics. Outbreaks of species or beetles were found in the rainy periods, but not in dry periods. We concluded that weather, rain and temperature affect species and leaf beetles number in the EPTEAMP; rainy and dry periods affected the population dynamics, whereas the largest percentage of species was found in the rainy period.

ASSUNTO(S)

protecao florestal chrysomelidae leaf beetles diversity besouro-desfolhador chrysomelidae diversidade

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