Structure and floristic composition of a lower montane evergreen forest in Palanda, Zamora Chinchipe, Ecuador.

Abstract:

The knowledge of the structure and floristic composition of the forest is important to plan the management and conservation. In Palanda Parish, Palanda Canton, province of Zamora Chinchipe, a remnant of lower montane evergreen forest was investigated, with the objective of determining the structure and floristic composition of the forest. Temporary plots of 20 m× 20 m (400 m 2) were installed where trees larger than 5 cm D 1, 30 m were registered. In nested form, three subplots of 5 m× 5 m (25 m 2) were delimited for shrubs and five subplots of 1 m× 1 m (1 m 2) for herbs; the shrubby and herbaceous individuals were recorded. Plots of 10× 10 m (100 m 2) nested in the floristic sampling plots were established to evaluate natural regeneration. These parameters were calculated: absolute density (D), relative density (RD), relative frequency (RF), relative dominance (RDm) and importance value index (IVI). Structural profiles were developed using a 10× 50 m transect. There were 100 species recorded, 59 are trees, 24 shrubs and 17 herbs. The most diverse families of the arboreal stratum are Rubiaceae, Lauraceae, Clusiaceae and Euphorbiaceae; of the shrubby stratum: Piperaceae, Solanaceae and Poaceae; and of the herbaceous: Dryopteridaceae, Polypodiaceae and Araceae. The ecologically important species of the arboreal stratum are Alsophila cuspidata and Nectandra lineatifolia; of the shrubby stratum: Chamaedorea linearis and Philodendron sp., and from the herbaceous stratum: Elaphoglossum latifolium and Peperomia blanda. The species with greater regeneration are Nectandra lineatifolia, Ceroxylon amazonicum, Hedyosmum …

Año de publicación:

2018

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