Tropical Biology Section
Fagua, José C. , Cabrera, Edersson .
Spatial distribution, Habitat preference, Population Structure, and Conservation Status of Aniba perutilis (Lauraceae) in Andean forests.
Aniba perutilis Hemsley (Lauraceae) is a timber tree widely distributed in Neotropic and is currently listed as vulnerable to extinction due to habitat loss and overexploitation. To evaluate the conservation status of A. perutilis we characterized the spatial distribution, available habitat and population structure. Field sites consisted of the last three large forest fragments (>200h) in the central Andes of Colombia (a principal zone of coffee production); Bremen Forest Reserve (847h), Barbas Canyon (821h) and OtÃºn-Quimbaya National Park (407h). These forest areas were not cut down in the past due to a high topographic gradient which hinders agricultural activities, but also can limits the distribution of A. perutilis. Using geographic information system we divided these areas into 300m2 plots, of these we randomly selected 9 plots in which we established transects between 100m x 10m and 60m x 10m. These transects were perpendicular to the line of the maximal topographic gradient and then divided into 10m x 5m sections (transect lengths are varied due to canyon formation). In each section we quantified the number of individuals and diameter at breast height (DBH), topographic gradient, landscape (valley, hillside and ridge), height above sea level, and solar radiation. Aniba perutilis was predominantly found on mountain ridges and slopes with topographic gradients lower than 30Âº, with no individuals found in valleys. Landscape type greatly influenced the available habitat for A. perutilis inside the forest fragments (Bremen reserve 36%, Barbas canon 27% and OtÃºn-Quimbaya National Park 35%). Additionally we found only individuals with a DBH <10cm and reproductive individuals with a DBH> 55cm; individuals with a DBH between 10 and 55cm were not found in any transects. This may be due to a history of indiscriminate cutting and now these populations are dependent on only a few reproductive individuals.
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1 - Puerto Rico University, Herbarium, Río Piedras Campus, Departamento de Biologia - FB246, POBOX 23360, San Juan, PR 00931-3360, San Juan, Puerto Rico, 00931, Puerto Rico-US
2 - Instituto Humboldt, Geographic information system, CALLE 28A # 15-09, Instituto Humboldt, Bogotá, Cundinamarca, Colombia
Presentation Type: Poster:Posters for Sections
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM