Dinâmica da interação abelha-planta: Efeito da sazonalidade nas redes ecológicas

Abstract

Studies of interactions between bees and plants from the perspective of ecological networks has brought new findings about patterns of interactions, both within the networks as a whole and the species that compose it. However, little is known about the temporal dynamics of this type of interaction. In this study, the aim was to determine whether the seasonal variation directly influences the topology of bee-plant interaction networks, generating significant differences in the values of calculated metrics. For analysis, we used a bank bees and plants of data collected in a transition Savannah-Amazon region in the state of Tocantins, Brazil, in the wet season (February / 2000 and March / 2000) and dry (July / 2000 and August / 2000). In the first chapter, the effect of seasonality on metrics within the network was analyzed, namely specialization in the network level (H2'), connectance (C) and nestedeness (WNODF). In the second chapter, this effect was analyzed at the level of populations, through the interaction of strength, specialization (d ') and centrality (Gc). In the last chapter, we selected the most abundant species for amplitude analysis (H'), evenness (J') and overlap of trophic niches. Despite being evidenced differences in the composition of the interactions and plant community between the dry and rainy seasons, those of calculated metric values showed no significant differences between seasons. With these results, it was concluded that the community has a general pattern of interactions that does not change between the dry and rainy seasons. Probably there is a replacement of the functional role of the species along these scales, as well as being associated with high presence of social and generalist species in the community.