Foliar phenology in the transition from dry season to rainy season in the dry forest at the Laipuna Nature Reserve, Loja, Ecuador
Keywords:
leaf phenology , hemispherical photographs, LAI, variance analysis, vegetation, dry forestAbstract
The research arises from the needdocument the phenologicalbehavior of dry forest species in the transition from dry season until the completion of the rainy season in the Laipuna Natural Reserve. Three plots of 0,36 ha each were subdivided in nine subplots of 0.04 ha, different altitudinal floors (1082 meters high, average and low 710 m 855 m). The photograph was taken with a digital camera with wide angle lens, this was located in the center of each subplot, which records chronologically the phenological phases in the transition from dry to rainy season. Hemispheric photographs were analyzed simultaneously for nine sampling points per plot with CAN-EYE software, which allowed determination of percentage of vegetation and Leaf Area Index (LAI). In the lowland plots and similar media, while for the upper zone are the major values that were justified by their functional diversity, with foliar renewal of 57,50% of vegetation and 1,10LAI. In the high plot there are no differences between the two seasons, but for the medium and low plots the highest values found in the dry season are determined. The use of hemispheric photographs is a promising method to determine foliar phenology with a low percentage of error. However, it is susceptible to the influence of climatic factors, such as solar radiation and the presence of rainfallMetrics
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