Demographic Structure of Natural Regeneration of Palm Trees in Forest Fragments in the Eastern Amazon
DOI:
https://doi.org/10.6008/CBPC2179-6858.2018.006.0005Keywords:
Remaining primary forest, Secondary forest, Attalea genus, Astrocaryum aculeatum, Stages of developmentAbstract
The objective of this work was to compare the structure of palm tree natural regeneration in the communities of Agrovila Araipá and São Tomé in Aveiro (PA). The inline transection method was performed, being four transections: two in each community and distributed in two different ecosystems: one in remnant primary forest ecosystems and another in secondary forest ecosystem. All non-reproductive individuals in the plot were registered and classified into six stages of life, but only the first four stages were included in the study. Each transection measured 300m long and 10m wide within each fragment. In the primary forest, 390 individuals were distributed in two species (Astrocaryum aculeatum Meyer and Attalea maripa (Aublet) Martius) and 226 individuals distributed in three (Attalea sp., Astrocaryum aculeatum Meyer and Attalea maripa (Aublet) Martius) species in the secondary forest. The structure analysis revealed a high occurrence of A. maripa individuals in the early stages of development, probably due to the absence and / or inefficiency of the dispersers of this species. The species A. aculeatum showed no difference in its occurrence in both types of forests (primary and secondary). However, in the secondary forest, Attalea sp. was considered relevant in the area, occurring exclusively in this vegetation; This is possibly because the primary forest is fragmented, surrounded by pasture and cropland, causing an imbalance in A. maripa recruitment. A high yield of fruit is likely to be a characteristic of the species and, consequently, a larger number of individuals in the early stages life.
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