Banco de sementes do solo em um fragmento de floresta estacional semidecidual ribeirinha no município de Dourados, MS como subsídio à restauração florestal

Abstract

The seed bank has important ecological role in supplying new individuals to plant communities . The composition of the seed bank allows inferences about the development , targeting the successional plant communities and regeneration of the site. The conduct of natural regeneration through seed bank has been used as a restoration technique , which can provide important information about the seed density , floristic composition and also indicate the potential for regeneration of an area to be recovered. In this context , the present study aimed to characterize the composition of the seed bank of a riverside semideciduous Forest Experimental Farm of the Federal University of Grande Gold . Two samplings , one in summer and one in winter and, in each time samples were collected at 50 points systematically distributed 20 x 20 cm , 5 cm depth were performed . The samples were kept in an incubator at the Federal University of Grande Gold with 50% shading for five months , after which the assessment was conducted . In collecting the winter period 29 species belonging to 27 genera and 13 families were identified , while in summer , 24 species were identified in 23 genera and 13 families , totaling 53 species in 26 plant families in both seasons . The Shannon diversity index Winner ( H ' ) in summer was 2.24 and evenness of 0.67 , for winter the winner Shannon diversity index ( H ' ) was 2.73 and evenness of 0 , 81 . Despite the predominance of herbaceous species in the two periods, in the summer there was an increase of tree species such as Trema micrantha ( L. ) Blume and Cecropia pachystachya Trécul.