Macrofauna Diversity in a Syntropic Agroforestry System in the Agreste Region of Alagoas

The objective of this research was to evaluate the reflection of a Syntropic Agroforestry System (SAS) in the Agreste Alagoano on the structure of soil macrofauna, since the edaphic fauna becomes an excellent bioindicator and has a peculiar susceptibility to interference in the environment. Macrofauna samples were collected (TSBF method) in three areas: SAS, Forest Fragment (FF) and Secondary Forest (SF). Soil invertebrates > 2 mm in diameter were identified at the level of taxonomic order and stage of development. The ecological parameters were carried out based on density (number of individuals per square meter), richness (number of orders), diversity (Shannon index) and evenness (Pielou index). The predominant macrofauna groups were Hymenoptera (29%), Coleoptera (19%), Haplotaxida (20%) and Isopoda (8%). Although the SAS had the highest density (164 individuals) and richness (I = 2.5) of individuals, the diversity and uniformity indices were higher in the FF area (H = 2.04) and (e = 0.89). Although Agroforestry Systems are a viable alternative for the development of macrofauna, the resources of the SAS were not yet sufficient to sustain a wide variety of organisms, since they were still in the initial stage of development.