Abstract
A successful restoration of riparian forests can recover the diversity of several groups of soil invertebrates. However, few studies have considered the recovery of the entire community of soil macrofauna and the relative effect in taxonomical and functional diversity. We evaluated how taxonomical diversity, in terms of abundance and richness, relates to trophic diversity in four patches of riparian forests that had been artificially recovered, and compared them to the reference site in Volta Grande Reservoir, Brazil. No relationship was found between taxonomic diversity and trophic diversity, suggesting functional redundancy among taxonomic groups. Nevertheless, we observed that the taxonomic group with more species presented higher trophic diversity than the rest, indicating low functional redundancy within this group. The abundance and the taxonomic and functional richness of the four restored sites was similar to the reference site. The forest recovery was efficient in recovering invertebrate soil community since the taxonomic and trophic composition recorded in our study were similar to the composition of natural areas. We emphasize the importance of studying edaphic fauna as a community in order to comprehend how it reacts to forest restoration.
Highlights
Over the last two decades, forest restoration focused on re-establishing vegetation with the expectation that the structural attributes needed by animal species will develop, allowing recolonization by native wildlife communities and restoration of the ecological functions that they provide (Kollmann et al 2016)
If we want to infer whether forest ecosystems are really being restored by active restoration, we need to evaluate whether vegetation structure recovery is able to imply in the reestablishment of the ecological functions in the edaphic community (Kollmann et al 2016)
We evaluated the hypothesis that diversity of the soil invertebrates is related to trophic diversity and that restoration, after 10 years, will recover the community in riparian ecosystems
Summary
The study was carried in the region of the Volta Grande Reservoir, in the states of Minas Gerais and São Paulo (20°01’54′′ S - 48°13’17′ W), Brazil (Figure 1). Specialists identified some exemplars, especially for Hymenoptera, Diptera, Coleoptera and Araneae because these groups have more species in our samples. For data analysis, were considered the most abundant groups and with well-known taxonomy, including 16 taxa: Blattodea, Coleoptera, Dermaptera, Diptera, Hemiptera, Hymenoptera, Lepidoptera, Orthoptera, Araneae, Opiliones, Pseudoscorpiones, Scorpiones, Chilopoda, Diplopoda, Mesogastropoda and Pulmonata. These taxa were chosen because they were in our samples. Nicho trófico de los grupos de macrofauna de suelo, muestreado en las áreas restauradas del Embalse Volta Grande, Brasil
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