Abstract
This study evaluated changes in the structure for remnant Mixed Ombrophilous Forest recovering from logging, which ceased over 40 years ago. Regarding the dynamics of the floristic composition of natural regeneration, 18 species remained (23.38% of the total) and 27 new species entered (35.06% of the total). The greatest increases were observed for Allophylus edulis, Myrsine umbellata, and Miconia cinerascens. When analyzing the dynamics of regeneration in ecological groups, it was observed that pioneer species had a similar value in both surveys (29.4% and 29.6%); secondary species decreased from 56.6% to 52.8%, and late-successional species increased from 0.2% to 6.0%. Therefore, the forest fragment studied is in a healing phase after disturbance, characterized by the increased regeneration of pioneer species as a result of sufficient light entering the interior of the forest.
Highlights
Mixed Ombrophilous Forest (MOF), known as Araucaria forest, is one of the main forest types of southern Brazil (Higuchi et al, 2012a)
This study evaluated the changes that occurred from 2012 to 2016 in the structure of the natural regeneration of a remnant of Mixed Ombrophilous Forest that has remained without intervention for more than 40 years, in the state of Santa Catarina, Brazil
The species richness found in this study was similar to that found by Aguiar et al (2017) in an MOF experiment in Lages, SC, Brazil, and by Santos et al (2015) in a fragment with the same forest typology in Lages, SC, Brazil
Summary
Mixed Ombrophilous Forest (MOF), known as Araucaria forest, is one of the main forest types of southern Brazil (Higuchi et al, 2012a). A greater understanding of the plant succession process in areas with different disturbance histories is essential, as it can generate data that detect the need to facilitate natural regeneration actions, as well as forest management incentives that facilitate recovery of other similar areas (Larsen et al, 2019) These studies can support the conservation and recovery plans of forest ecosystems by enabling the identification of limiting environmental factors and inferring the future dynamics of forests (Aguiar et al, 2017; Dalla Rosa et al, 2016). This study evaluated the changes that occurred from 2012 to 2016 in the structure of the natural regeneration of a remnant of Mixed Ombrophilous Forest that has remained without intervention for more than 40 years, in the state of Santa Catarina, Brazil
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