Forest management; Moss; Hepatic; Biodiversity; Conservation

Amazonian forests have a predominance of large species, with a wide-ranging canopy and a very closed canopy, reducing the gradient of solar radiation inside them to the ground. Deforestation and degradation of tropical forests have become the focus of contemporary studies, due to their vulnerability in the face of the increasing occupation of territories under different land uses. Forest management as a practice through selective wood extraction is an alternative that aims to carry out the sustainable extraction of wood resources without causing such significant impacts on biodiversity, despite this, this practice highlights the simplification of the forest and the formation of artificial clearings. Clearings are disturbances in forests due to the opening of the canopy, starting a process of local ecological succession with the emergence of pioneer species, especially heliophiles. Natural clearings are formed when trees fall, providing a more stable environment with soil structure, humidity levels and diversity of microhabitats less impacted when compared to artificial clearings resulting from logging, due to more significant changes in the structure of the habitat. , nutrient availability and microclimatic conditions. Among the communities impacted by the removal of vegetation cover are bryophytes, which act as indicators of the conservation status of the natural area, presenting different responses to changes in temperature and humidity. Certain species of bryophytes are called sun specialists, showing preferences for open areas such as unprotected soil, exposed rocks, as well as branches and trunks at the forest edge or in clearings. Therefore, this study is fundamental to understanding the impacts of selective logging on bryophyte communities in clearings, whether the structure (size, shape and openness of the canopy) of these clearings influences the richness and composition of this community, as well as whether the bryophyte community in the gaps are a subset of the natural forest areas or are distinct communities from each other. For this, the study will be conducted in a total of 40 plots, 10 plots in natural clearings and 10 in Terra Firme forest, located in the Ferreira Penna Scientific Station area and 10 plots in artificial clearings and 10 in Terra Firme forest, located in the concession area for logging. To date, collections have been carried out in 20 plots, 10 in unchanged forests and 10 in natural clearings, where a total of 1,070 samples were collected, 244 of which have already been identified, obtaining a total of 78 species, including mosses (28) and hepatic (50). The most representative family in terms of both the number of genera and the number of species was the Lejeuneaceae family with 22 genera and 44 species, followed by the Calymperaceae family with 3 genera and 9 species. Furthermore, the total occurrence of 616 specimens was identified, divided between areas of natural clearing (19) and intact forest (597). Therefore, the study can contribute to greater understanding of the impacts of selective logging in forest ecosystems, highlighting the importance that the bryophyte community can present as responses to the effects caused by this practice.