Natural regeneration dynamics of a population of Eschweilera ovata in a selectively exploited upland forest in Pará state
DOI:
https://doi.org/10.6008/CBPC2674-6441.2021.002.0003Keywords:
Eschweilera ovata, Monitoring, Dynamics, Forest explorationAbstract
The present study aimed at evaluating the population dynamics of natural regeneration for Eschweilera ovata (Cambess.) Mart. ex Miers, after selective logging in Estação Experimental da Embrapa Amazônia Oriental (Embrapa’s Eastern Amazonia Experimental Station), in Moju, Pará. 9 (nine) gaps were selected, and 12 (twelve) plots of 2x2m were installed in each gap, starting at the edge of the gap and going towards the forest: north-, south-, east- and westbound, where all individuals standing ≥ 10 cm and with DBH < 5 cm were measured. Natural regeneration, ingression and mortality rates were analyzed in relation to distance (edge, 20m and 40m), direction (N, S, E, W) and monitoring period. Data were analyzed using Biostat 5.0 software (Kruskall-Wallis analysis). There were no significant differences for the analyzed items, but low natural regeneration, ingression and mortality rates were observed in the first evaluation period (1998-2001), implying that gap opening did not stimulate natural regeneration. The 2001-2007 period was marked by high ingression rates, stimulated by the closing of the canopy, and the last period was characterized by high mortality, which may be related mainly to intraspecific competition. Positive regeneration rate (RR) was observed only at the edge of the gap, influenced by high ingression, and northbound. The species exhibited the typical behavior of tolerant species, and distinct in relation to chosen items (distance, direction and monitoring period), indicating that items that have not been assessed may have strongly influenced the behavior of E. ovata.
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