Aspectos estruturais da comunidade arbórea em remanescentes de floresta estacional decidual, em Corumbá, MS, Brasil

Abstract

-(Structural features of the arboreal community in remnants of dry forest in corumbá, MS, Brazil). the structure of the arboreal community of two types of dry forest was compared in an altitudinal gradient of lowland (FedtB) and submontane (FedSM) dry forests, in corumbá, MS, Midwest Brazil. tree species with circumference at breast height ≥ 15 cm were sampled, using the point centered quarter method. in the FedtB 80 points were demarcated, and in FedSM 78 points were distributed in the following altitudes: 180 m (18 points), 220, 260 and 300 m (20 points each). in FedtB 34 species were sampled; Calycophyllum multiflorum Griseb., Ceiba pubiflora (a. St.-hil.) k. Schum. and Anadenanthera colubrina (Vell.) Brenan have the highest Vi values. in FedSM, 33 species were sampled, and Anandenanthera colubrina, Ceiba pubiflora and Acosmium cardenasii h. S. irwin & arroyo were the most important. the distribution pattern of the species varied along the altitudinal gradient. in both forests Shannon's diversity and equitability indexes were 2.9 and 0.8, respectively, and the most representative families were Fabaceae (8 species) and Rubiaceae (4 species). the studied forests have low density of individuals in relation to other studies, except for the track at 300 m. About 22.46% of the individuals of arboreal community had basal ramifications and were in the initial phases of succession. the canopy varied from 6 to 12 m, and emergent individuals of up to 18 m. these remnants represent a source of biodiversity for the Pantanal, being an important part of the natural forest corridors of the region. Parte da dissertação de mestrado da primeira autora, Programa de

Phylogeny and biogeography ofCeibaMill. (Malvaceae, Bombacoideae)

“…Ceiba species such as C. pubiflora are often widespread (Fig. 2) and abundant (Lima et al 2010). Taken together, this evidence suggests that the non-monophyly of Ceiba species found in SDTF such as C. pubiflora may be a reflection of large effective population sizes and hence a longer time to coalescence (Naciri andLinder 2015, Pennington andLavin 2016), rather than due to hybridisation or ITS paralogy.…”

Impacts of artificial reservoirs on floristic diversity and plant functional traits in dry forests after 15 years

“…Anemochoric dispersal is favored in dry environments (Lima et al, 2010), because the dry diaspores can be easily carried, however, high moisture may wet the seeds, increase their weight, and make them more difficult to be carried (Talora and Morellato, 2000;Spina et al, 2001). Leaf deciduousness also facilitates wind dispersal, because less foliage means less barriers to wind (Spina et al, 2001).…”

Composição E Distribuição De Espécies Arbóreas Em Gradiente Altitudinal, Morraria Do Urucum, Brasil

“…A floresta do morro São Domingos pode sofrer influência de outras formações próximas, como as florestas decíduas e cerradões (topo da morraria), onde ocorre maior riqueza de Bignoniaceae (Santos-Diniz & Souza 2011, Salis et al 2006. No cerradão (a 700m) o destaque das famílias como Fabaceae, Vochysiaceae e Rubiaceae corrobora com resultados obtidos em estudos de outras partes do Brasil (Costa & Araújo 2001, Salis et al 2006, Souza et al 2008, 2010, Camilotti et al 2011, Araújo et al 2011, Silva & Felfili 2012. A variação na importância das famílias pode estar correlacionada às distintas altitudes (Oliveira-Filho & Fontes 2000), como observado no Urucum.…”