Marcos Vinicius Bastos Garcia

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Sex and recombination are central processes in life generating genetic diversity. Organisms that rely on asexual propagation risk extinction due to the loss of genetic diversity and the inability to adapt to changing environmental conditions. The fungus-growing ant species Mycocepurus smithii was thought to be obligately asexual because only parthenogenetic(More)
The impact of termites on nutrient cycling and tropical soil formation depends on their feeding habits and related material transformation. The identification of food sources, however, is difficult, because they are variable and changed by termite activity and nest construction. Here, we related the sources and alteration of organic matter in nests from(More)
Guarana (Paullinia cupana var. sorbilis (Mart.) Ducke, Sapindaceae family) is an important and traditional crop of significant economic and social importance in the Amazon region. It is a Brazilian native plant, cultivated by large-and small-scale producers (Embrapa 2005). Its fruits are dehiscent capsules that contain one or three dark brown seeds, with(More)
In this natural history note we describe and illustrate the specialized predatory behavior of the ponerine ant Thaumatomyrmex paludis from the Brazilian Amazon. This study of T. paludis implies that specialized predation on polyxenid millipedes is widespread in the genus Thaumatomyrmex. The observation that one T. paludis forager only partly depilated its(More)
Parathion-methyl is an organophosphorous insecticide that is widely used in agricultural production sites in the Amazon. The use of this pesticide might pose a potential risk for the biodiversity and abundance of fish and invertebrate species inhabiting aquatic ecosystems adjacent to the agricultural fields. Due to a lack of toxicity data for Amazonian(More)
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