Comparative analysis of two vegetation types and its ecotone, Miranda - MS
DOI:
https://doi.org/10.5433/1679-0367.2011v32n2p213Keywords:
Brazilian pantanal, Diversity, Floristic survey, Paratudal, Riparian vegetation, Similarity.Abstract
The Pantanal consists of different vegetation types, including the Paratudal, a monodominat floodable savanna, and Riparian vegetation. This study aimed to analyze diversity and similarity in samples of these two vegetations, and its ecotone. The study was developed in the region of Passo do Lontra, at the Miranda river margins. Five plots 10 x 10m, were allocated in each area, where all individuals above 1m height were counted and identified. Nine hundred and thirteen individuals were registered, distributed in 70 taxa, of which 60 were identified in species level. The Shannon diversity index (H’) was 2.715 with Pielou Eveness (J’) of 0.806 in Paratudal, 3.010 and 0.835 in Riparian vegetation, and 2.739 and 0.797 in ecotone, respectively. These results show highest diversity in the Riparian vegetation, as expected, since the Paratudal’s ambient conditions are more restrictive. The floristic similarity between the Paratudal and the Riparian vegetation, according to the Sorensen index, was of 0.2, what distinguishboth environments. Therefore, this study evidences the distinction among Riparian vegetation and Paratudal, as well the existence of an intermediary values with ecotone.
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