Abstract

TOLEDO V., Gabriel; MORAES R., Mónica; SAAVEDRA, Francisco  and  ISIDORI, Fosca. Population structure of the Saó palm (Trithrinax schizophylla) in Paurito (Santa Cruz). Ecología en Bolivia [online]. 2018, vol.53, n.2, pp.83-95. ISSN 1605-2528.

Palm trees are floristic elements of great importance in forest ecosystems of Bolivia due to their high diversity and their economic importance for human communities. Trithrinax schizophylla (saó palm) is one of the most important cultural and economic species for the department of Santa Cruz. In the present study, the density and population structure of this palm tree was evaluated in the Palmera de Saó Municipal Protected Area (APPS) located in the Paurito canton. To evaluate the density and population structure we established ten temporary plots of 30 x 20 m distributed randomly in the study site, where all the individuals were recorded according to their age category (seedling, juvenile, sub-adult and adult). In general, the pattern of the population structure of the species corresponds to the classic inverted “J” pattern (type I curve) with 41% of seedlings and 29% of adults. Additionally, significant differences were found in the density of individuals between age categories. However, at the plot level, other trends were evidenced: model II and III, which suggest threats to the regeneration levels of the saó palm. The curve of the population structure reflects that T. schizophylla is being affected by 50% in the age group of seedlings that is the most vulnerable, due to the intensity of use by saoceros and floods in the area. Therefore, the results of this study can contribute to updating the management plan of the protected area and make use of this species under criteria of conservation and good management.

Keywords : Useful palm tree of Bolivia; Seedling; Regeneration.

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