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Provedor de dados:  Acta Botanica
País:  Brazil
Título:  Toward a better understanding of the subtropical Atlantic Forest in the state of Santa Catarina, Brazil: tree sampling accuracy, species richness and frequency of rare species
Autores:  Rezende,Vanessa Leite
Eisenlohr,Pedro V.
Gasper,André Luís de
Vibrans,Alexander Christian
Oliveira-Filho,Ary Teixeira de
Data:  2014-09-01
Ano:  2014
Palavras-chave:  Chao 2
First-order jackknife
Rare species
Semideciduous forest
Resumo:  Accurate knowledge of floristic composition is crucial when planning and designing research projects and public policies. In this study, our goal was to assess tree sampling accuracy and to identify sites with higher concentrations of rare tree species, as well as those with the highest tree species richness, in the state of Santa Catarina, Brazil. We determined sampling accuracy using the first-order jackknife and Chao 2 estimators, calculated the number of rare species (singletons and doubletons) and applied sampled-based rarefaction. We found that sample accuracy (estimated vs. observed values) was over 90% for the state as a whole, the best estimates having been obtained for the areas of rain forest (first-order jackknife: 91%; Chao 2: 95%). Of the tree species identified, 16.6% were considered rare in the state and only 4% were found in all forest types. Among the various forest types, semideciduous forests showed the highest proportions of rare tree species. Tree species richness was highest in the rain forests and lowest in the dwarf cloud forests. Our results make an important contribution to the conservation of tree species within one of the "hottest" biodiversity hotspots in the world.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Botânica do Brasil
Relação:  10.1590/0102-33062014abb3146
Formato:  text/html
Fonte:  Acta Botanica Brasilica v.28 n.3 2014
Direitos:  info:eu-repo/semantics/openAccess

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