Estrutura diamétrica da comunidade e das principais populações arbóreas de um remanescente de Floresta Atlântica Submontana (Silva Jardim-RJ, Brasil)

Carvalho, Fabrício Alvim; Nascimento, Marcelo Trindade

doi:10.1590/s0100-67622009000200014

Cited by 32 publications

(25 citation statements)

References 14 publications

(12 reference statements)

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“…The evaluation of the diameter distribution at the community level has been shown to be an important tool for understanding vertical structure in forests. On the other hand, it may be insufficient to assess the condition of the tree component, and therefore analyses at the population level are needed (Martins 1991, Felfili 1997, Paula et al 2004, Carvalho & Nascimento 2009). Kurtz & Araú jo (2000) postulated that equilibrated populations have nearly balanced diameter distributions, tending to produce an inverted-J curve, which is typical of species with abundant regeneration and a stable population structure.…”

Section: Discussionmentioning

confidence: 99%

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

et al. 2015

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The State of Rio de Janeiro still holds unknown portions of the Atlantic Forest, which represent gaps in the knowledge of this ecosystem. Paracambi and neighbor municipal districts comprise a vast stretch of virtually unknown forest that makes up part of the Serra do Mar biodiversity corridor. The following study describes the tree community structure in a stretch of the ombrophilous Atlantic Forest, in the Parque Natural Municipal do Curió (Curio MNP), Paracambi, Rio de Janeiro, which serves as the basis to evaluate species diversity and conservation status. The altitudes in the area ranges from 100 to 690 m and the climate varies from mild subtropical to tropical hot and humid. Forty plots (10x10m) were randomly placed along the area, where all the stems equal to or greater than five centimeters (5 cm) diameter at breast high from ground level were measured. A total of 749 individuals, pertaining to 128 genera and 210 species were recorded, eight of which are listed as threatened of extinction in the Brazilian flora. The Shannon-Weaver diversity index (H′) was 4.7 nat.ind.-1 and the species with greater importance value was Pseudopiptadenia contorta (1.6460 m2; 18 individuals) while the most common species wereSenefeldera vertcilata (48) and Actinostemon verticilatus (47 individuals). Despite the sample area being a little smaller than that commonly adopted in tropical studies, data pointed to a richness hitherto not registered in any other study for the State of Rio de Janeiro, no matter the inclusion criteria used, and also confirmed by the two estimator indices used, which have revealed very similar results. The vertical forest structure, the values associated to the successional stage of the species and other aspects of community structure indicate that the Curio MNP encompasses forest stretches in advanced stages of ecological succession. Besides its key location for the connectivity of forest fragments in the region, the results emphasize the ecological importance of this forest remnant and the need for its conservation.

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Section: Discussionmentioning

confidence: 99%

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

et al. 2015

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“…The Liocourt q-ratio pointed to high maintenance rates for diameter classes, especially for the smaller diameters. This is a recurring pattern for native populations of tropical forests (Carvalho and Nascimento 2009). The q values below the mean are not indicative, in this case, of maintenance problems in higher classes, since the larger individuals in such groups were the first to establish in the area.…”

Section: Discussionmentioning

confidence: 88%

Ecologia e controle da invasão de Pinus elliottii no campo cerrado

Abreu¹

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“…Although the FSM has a history of human disturbance, no timber extraction or other type of human activities has taken place there in the last 60 years. Nevertheless, this lack of large individuals may be due to mortality of older, larger individuals after intense disturbance or by timber extraction, as observed in remnants of Amazon rain forest (Laurance et al 2000) and submontane Atlantic Forest (Carvalho & Nascimento 2009). Therefore, the exclusion of individuals of the canopy could favor an increase in the number of small individuals, suggesting that there was a change in the successional processes and in the current structural conformation in this forest fragment.…”

Section: Discussionmentioning

confidence: 99%

Structure and floristic diversity of remnant semideciduous forest under varying levels of disturbance

2014

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The perturbation of Neotropical forests generates large disturbances in biological communities. The species that suffer least from the resulting habitat fragmentation are the pioneers, because they possess greater ability to inhabit disturbed environments. Therefore, it is expected that species diversity will be greater in areas subjected to intermediate disturbance, such as the opening of gaps, because a large number of pioneer species will develop and coexist with species of more advanced successional stages. This study aimed to compare two forest remnants that differed in size and disturbance intensity, in order to determine the effects of disturbances on species diversity and the size ratios of individual trees. This was accomplished with comparative analyses of diversity, richness and diameter ratios obtained for 10 plots at two semideciduous forest sites. We recorded a total of 85 species, of which 70 were in the private nature reserve Fazenda Santa Maria, 58 were in Iguaçu National Park, and 43 were at both sites. Diversity was greater in the more disturbed remaining forest, because this area showed higher species richness, which is in accordance with some premises of the intermediate disturbance theory. There was also an increase in the number of pioneer individuals, and the less disturbed area showed individuals with larger diameters, which is likely attribu table to the removal of large individuals from the more disturbed area during the anthropogenic process of forest modification.

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Estrutura diamétrica da comunidade e das principais populações arbóreas de um remanescente de Floresta Atlântica Submontana (Silva Jardim-RJ, Brasil)

Cited by 32 publications

References 14 publications

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

Diversity, community structure and conservation status of an Atlantic Forest fragment in Rio de Janeiro State, Brazil

Ecologia e controle da invasão de Pinus elliottii no campo cerrado

Structure and floristic diversity of remnant semideciduous forest under varying levels of disturbance

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