Efeitos do manejo florestal sustentável sobre a assembleia de tachyporinae (coleoptera insecta) em uma floresta de terra firme na Amazônia brasileira

Abstract

Tropical forests provide important environmental services, yet they are impacted by numerous human actions that cause habitat loss and change the structure of the forest, such as fires, deforestation, illegal mining and logging. In this sense, practices such as forest management, which combine productivity and sustainability, are alternatives for development in the intertropical region. Despite using techniques that seek to reduce damage to the environment, forest management is not exempt from producing disturbances and damage to the ecological integrity of forest environments. The impact of this activity on the fauna is still an object of study for many researchers. Given the above, the objective of this work was to evaluate the effects of time elapsed after logging on the Tachyporinae assemblage in a terra firme forest in the Brazilian Amazon. A total of 240 traps were used, distributed in 11 areas with different years of exploitation (time elapsed after exploitation between 1 and 15 years) and in an unexplored control area. To capture the insects, flight interception traps were used with baits made from swine feces (90%) and human feces (10%). The individuals of the subfamily Tachyporinae were sorted, separated, counted and mounted on entomological pins, the specimens were separated according to external morphological characteristics and grouped into morphospecies. A total of 1441 individuals of the subfamily Tachyporinae were captured, distributed in 17 morphospecies. The number of individuals per area ranged from 39 (3 years after logging) to 247 (4 years after logging) and the number of morphospecies ranged from 4 (6 years after logging) to 9 (7, 4 and 2 years after logging). exploration). Forest management activities impacted the Tachyporinae assemblage. These effects were noticeable in the first year after logging, where the structure of the assemblage was different in relation to areas logged longer. The study showed that the Tachyporinae assemblage, considering the change in its structure over the years after logging, shows up as a group of fauna that can be used as an indicator in monitoring altered areas.