11
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Floristic composition, diversity and structure of the "cerrado" sensu stricto on rocky soils in northern Goiás and southern Tocantins, Brazil Translated title: Composição florística, diversidade e estrutura do cerrado sensu stricto sobre solos rochosos no Norte de Goiás e Sul de Tocantins

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The "cerrado" sensu stricto is a savanna woodland physiognomy which occupies most of central Brazil, with the degree of canopy cover varying from 10% to 60% at a site with trees reaching up to seven meters high. It occurs mostly on deep and well-drained soils but can also be found on shallower ones. The diversity and structure of the "cerrado" sensu stricto on shallow and rocky Cambisols and Litosols were studied here. Sixteen 20 x 50 m² plots were sampled in a random design over patches of this vegetation in northern Goiás State and southern Tocantins. All stems from 5 cm diameter at 30 cm from the ground level were measured. Vouchers were collected and deposited at the IBGE herbarium. A total of 87 species in 65 genera and 33 families were found. Diversity index was 2.87 nats ind-1, density was 836 stems ha-1 with a basal area of 8.4374 m² ha-1. Sørensen's index indicated higher similarities between plots at the same site indicating a geographical gradient influencing the floristic composition of the "cerrado" sensu stricto on rocky soils. Czekanowski's index confirmed this trend. TWINSPAN classification final groups were defined by preferential species of more fertile soils, in opposition to those typical of dystrophic soils and to common species to gallery forests occurring on sloping terrains with gullies.

          Translated abstract

          O cerrado sensu stricto é uma savana que ocupa grande parte do Brasil Central, apresentando cobertura lenhosa de 10% a 60% onde árvores alcançam até sete metros de altura. Ocorre principalmente em solos bem drenados e profundos mas é também encontrado em solos mais rasos. A diversidade e a fitossociologia do cerrado sensu stricto em Cambissolos e Litossolos rochosos foram aqui estudadas. Dezesseis parcelas de 20 x 50 m² foram amostradas aleatoriamente sobre manchas dessa vegetação no Norte de Goiás e Sul de Tocantins. Os troncos com diâmetros a partir de 5 cm a 30 cm do nível do solo foram medidos. As coletas foram depositadas no herbário do IBGE. Um total de 87 espécies em 65 gêneros e 33 famílias foram encontrados. O índice de diversidade de Shannon foi de 2,87 nats ind-1, a densidade foi de 836 troncos ha-1 e a área basal foi de 8,4374 m² ha-1. O índice de Sørensen indicou similaridades mais elevadas entre parcelas no mesmo local, sugerindo a existência de um gradiente geográfico influenciando a composição florística do cerrado sensu stricto sobre solos rochosos. O índice de Czekanowski confirmou esta tendência. Os agrupamentos finais da classificação por TWINSPAN foram definidos por espécies preferenciais de solos mais férteis, em oposição à espécies típicas de solos distróficos e à espécies comuns com matas de galeria, que ocorreram nas grotas.

          Related collections

          Most cited references39

          • Record: found
          • Abstract: not found
          • Article: not found

          The evolution and classification of flowering plants

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Diversity, structure and dynamics of a gallery forest in central Brazil

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Delimitation of the cerrado concept

                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rbb
                Brazilian Journal of Botany
                Braz. J. Bot.
                Sociedade Botânica de São Paulo (São Paulo )
                1806-9959
                September 2007
                : 30
                : 3
                : 375-385
                Affiliations
                [1 ] Universidade de Brasília Brazil
                Article
                S0100-84042007000300004
                10.1590/S0100-84042007000300004
                cd063d3c-11cc-4cf2-978a-331a2001f4ba

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-8404&lng=en
                Categories
                PLANT SCIENCES

                Plant science & Botany
                diversity,rock outcrops,savanna,woody vegetation,afloramento de rochas,cerrado,diversidade,savana,vegetação lenhosa

                Comments

                Comment on this article