Ecosystem Disturbances and Diversity Increase: Implications for Invertebrate Conservation |
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Authors: | Rafael Dias Loyola Sofia-Luiza Brito Rodrigo Lopes Ferreira |
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Institution: | (1) Laboratório de Ecologia e Comportamento de Insetos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Caixa Postal 486/CEP, 30161-970 Belo Horizonte, MG, Brasil;(2) Laboratório de Ecologia do Zooplancton, Universidade Federal de Minas Gerais, Caixa Postal 486/CEP, 30161-970 Belo Horizonte, MG, Brasil |
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Abstract: | The Pantanal is one of the faunistic provinces considered as a priority area for invertebrate conservation. However, it is
one of the areas in Brazil where the local fauna is less assessed, thus needing more scientific information that could allow
political decisions to be made regarding conservation. The continuous pressure for new pasture areas leads to improper habitat
occupation and destruction, like fragmentation of forest areas in the region. Such alterations can cause different impacts
on the local fauna, including the soil arthropods. The main objective of this work was to compare the morphospecies composition,
diversity and density of the soil arthropod fauna between a secondary single species forest (Cambarazal) and a cultivated
pasture with exotic and native grass species, using only pitfall traps as sampling method. We found a great variation on the
vegetal cover among environments. A higher humidity in the forest soil was observed, as well as a greater compaction of the
soil in the cultivated pasture. A total of 3635 individuals were collected, belonging to 214 different morphospecies. 139
morphospecies were collected in the forest (37% exclusive to this environment), while 134 morphospecies were collected in
the cultivated pasture (35% exclusive). The diversity was higher in the forest (H′ = 1.634) than in the cultivated pasture (H′ = 1.253). However, considering the area as a whole (forest and pasture) the global diversity was increased. In this paper
we discuss about the effects of environmental changes on soil arthropod diversity and propose a hypothetical model for invertebrate
management in mosaic ecosystems. |
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Keywords: | Conservation Diversity Ecosystem disturbances Management Neotropics Pantanal Soil Arthropods |
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