Características ecológicas e implicações para a conservação da Reserva Florestal do Morro Grande

Abstract

In the last five years, the Morro Grande Forest Reserve (MGFR) has been systematically surveyed for different taxonomic groups. More than 13.000 individuals from 673 species of trees, nonvolant small mammals, birds, reptiles, anurans and orb-weaver spiders were sampled. The comparative analysis of the results reveals consistent biodiversity patterns which concern four central issues: i) the MGFR is situated in an ecotone location with the influence from the ombrophilous and mesophilous forests and also from the interior savanna region; ii) all taxonomic groups presented significant differences in species composition and/or richness when medium to old secondary forests (80 to 90 years of regeneration) were compared with old-growth forests (or "mature" forests), where only selective logging were observed; this should contribute to a high gamma diversity, given that the MGFR is a complex mosaic of vegetation in different successional stages; iii) partly due to the two first factors, the MGFR presents a consistent pattern of high species diversity when compared with other areas from the Atlantic Forest region; iv) due to its location in a high human density matrix, the MGFR is being submitted to strong disturbances, mostly related with hunting, vegetation exploitation, and alien species invasion. The conservation of this unique biota will depend on the establishment of a management plan that can take advantage of the proximity from the city of São Paulo, specially for projects of education, tourism and scientific research, and that could control the problems of exotic species, hunting, vegetation exploitation and inappropriate use of the MGFR surrounding.

A Vegetação Secundária Em Um Fragmento Florestal Urbano: Influência De Exóticas Invasoras Na Comunidade Vegetal

“…Portanto, Pittosporum undulatum afeta o desenvolvimento de outras espécies, seja pelo seu adensamento, seja por inibir a germinação de outras, ou por diminuir a disponibilidade de polinizadores para as espécies nativas. O tronco não abriga plantas epífitas, diminuindo a diversidade destas no ambiente invadido (Goodland e Healey, 1997 (Metzger et al, 2008), e em fragmentos florestais em Embu (Franco et al, 2007).…”

Estádio sucessional e fatores geográficos como determinantes da similaridade florística entre comunidades florestais no Planalto Atlântico, Estado de São Paulo, Brasil

“…De fato, na região de Ibiúna vem sendo observada não apenas uma alta riqueza florística, mas também um padrão de elevada riqueza para diferentes grupos de animais, como pequenos mamíferos, anfíbios e aranhas (Metzger et al 2006b), o que faz com que essa região seja especialmente valiosa para conservação.…”

New records of Rhagomys rufescens (Rodentia: Sigmodontinae) in the Atlantic forest of Brazil

“…One of the individuals was captured near the city of Ibiúna in a fragment of closed forest in the Reserva Florestal do Morro Grande, where two other specimens of R. rufescens have been registered . Method of capture, elevations and detailed description of the relief can be obtained in Metzger et al (2006) and Pardini and Umetsu (2006). The other records are two individuals collected with pitfalls traps of 60 litres in a continuous forest adjacent to the Parque Estadual de Intervales, in Ribeirão Grande.…”