<b>Effect of selective logging on floristic and structural composition in a forest fragment from Amazon Biome

Abstract

ABSTRACT. This study was conducted in one region of a Seasonal Semideciduous Forest located in Tapurah (Mato Grosso State, Brazil) with the aim of studying its floristic and structural composition. The fixed area method was applied to 10 × 250 m clusters, allocating and measuring five clusters with five subunits of 500 m² each. Species with a diameter at breast height greater than or equal to 10 cm were considered, and the sample sufficiency of the floristic survey was verified by a species accumulation curve. The similarities between the sample subunits were calculated by the Jaccard Similarity Index, and the species diversity with the Shannon Diversity Index and Pielou Evenness Index. The horizontal vegetation structure was characterized by density, frequency, dominance and the values of ecological importance, and diametric distribution were assessed by the Spiegel procedure. The families Vochysiaceae, Fabaceae and Sapindaceae were highly represented, and Qualea paraensis, Aspidosperma discolor and Matayba arborescens were the most important species. A high diversity and low ecological dominance were found, and the diametric structure of the trees presented a negative exponential distribution. In general, the structure, floristic composition and richness of vegetation correspond to a forest with stable and autoregenerative community after selective logging.

A taxonomic account of Myrcia (Myrtaceae) at the sites of the Biological Dynamics of Forest Fragments Project, Amazonas, Brazil

“…Myrcia is an important group of plants in the Amazon forest (Cardoso et al 2017), frequently reported in floristic surveys (Ferreira 1997;Godoy et al 1999;Rocha et al 2017), occasionally as a relevant structural component (Kunz et al 2008). Even so, few studies have explored local richness of this genus in Amazonian habitats: notable examples are the monographs of Myrtaceae from Peru (McVaugh 1958), the Guayana Highland (McVaugh 1969), the Ducke Reserve, in Brazil (Souza et al 1999), and the Venezuelan Guayana (Holst et al 2003).…”

Forest Fragment Grouping Analysis Under Selective Logging in Amazonian Biome

“…And the consequences are serious, fragmentation affects the organization of natural communities, reduces biodiversity, increases the risk of extinction of wild animals and compromises the ecological services provided by the forest. Furthermore, the mere presence of these fragments does not guarantee their maintenance (ROCHA et al, 2017).…”

A taxonomic account of Myrcia (Myrtaceae) at the sites of the Biological Dynamics of Forest Fragments Project, Amazonas, Brazil

“…Myrcia is an important group of plants in the Amazon forest (Cardoso et al 2017), frequently reported in floristic surveys (Ferreira 1997;Godoy et al 1999;Rocha et al 2017), occasionally as a relevant structural component (Kunz et al 2008). Even so, few studies have explored local richness of this genus in Amazonian habitats: notable examples are the monographs of Myrtaceae from Peru (McVaugh 1958), the Guayana Highland (McVaugh 1969), the Ducke Reserve, in Brazil (Souza et al 1999), and the Venezuelan Guayana (Holst et al 2003).…”