Banca de DEFESA: ANILDO FERREIRA MACHADO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANILDO FERREIRA MACHADO
DATA : 24/02/2022
HORA: 14:00
LOCAL: Remoto
TÍTULO:

COMMUNITY OF DUMP ROLLERS (COLEOPTERA: SCARABAEIDAE: SCARABAEINAE) IN SOYBEAN CROPS IN THE AMAZON, CERRADO AND AMAZON-CERRADO TRANSITION IN MATO GROSSO, CENTRAL-WEST BRAZIL

PALAVRAS-CHAVES:

Agricultural landscapes, Community structure, Diversity patterns

PÁGINAS: 61
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

Habitat loss from the expansion of agriculture is cited as one of the main threats to biodiversity. Agricultural landscapes are increasingly common, however, in these areas the processes and mechanisms related to the persistence of biological communities are still poorly understood. Thus, the prediction of how these communities respond to certain factors can be the basis for planning the conservation of remnants of native habitats and management practices in agricultural systems that are less aggressive. Insects in general are diverse, abundant and participate in important ecological processes for the maintenance of the ecosystem and services for humans. Therefore, they are good organisms for this type of studies. Among insects, beetles of the subfamily Scarabaeinae, “dung beetles”, (Coleoptera: Scarabaeidae) are indicators of changes in animal and plant communities and in ecosystem functioning, as, among other things, they are sensitive to physical and ecological changes in the habitat. The state of Mato Grosso, Midwest region of Brazil, is one of the largest producers and exporters of soybean (Glycine max L.), in which its cultivated area advances over the native vegetation in the Amazon, Cerrado and Ecotone (Amazon-Cerrado Transition). In view of this, dung beetles were collected with pitfall traps in 75 remnants of native vegetation, maintained in Legal Reserve areas, and in 99 adjacent soybean crops. First, we assess the impacts of converting native habitats into crops, identify which species are able to persist in these environments and which factors (amount of habitat, amount of pasture, time of land use as a crop and time since last grazing) influence this community; crops maintain a community distinct from that found in native environments; Pastures fields and the amount of habitats were good predictors of richness and similarity of composition, however, neither one of the variables studied has an influence on the abundance of dung beetles. Then, we analyze which factors (richness of native environment, NDVI, amount of habitat, amount of pasture and time of anthropic land use) affect the dissimilarity (beta diversity) of species composition; NVDI was the variable that most influenced the change in composition between communities and that there is a marginal effect of species richness in native environments. Therefore, our results suggest that the presence of more conserved native vegetation remnants (Legal Reserves) is important for maintaining the diversity of dung beetles in soybean growing environments, which, consequently, will favor the maintenance of functions ecological and services ecosystems.

MEMBROS DA BANCA:
Presidente - 80970002 - DIONEI JOSE DA SILVA
Interno - 136121002 - ALESSANDRA REGINA BUTNARIU
Interno - 101366004 - MONICA JOSENE BARBOSA PEREIRA
Externo à Instituição - RENATO PORTELA SALOMÃO - INPA