WIT Press


ENVIRONMENTAL INDICATORS IN FOREST FRAGMENTS FROM URBAN WATERSHEDS

Price

Free (open access)

Paper DOI

10.2495/EID180111

Volume

215

Pages

12

Page Range

121 - 132

Published

2018

Author(s)

REGINA MÁRICIA LONGO, ALESSANDRA LEITE DA SILVA, SUELI DO CARMO BETTINE, ANTONIO CARLOS DEMAMBORO, ADRIANO BRESSANE, FELIPE HASHIMOTO FENGLER, ADMILSON ÍRIO RIBEIRO

Abstract

Accelerated urbanization in Brazil promoted the rapid growth of cities and, in most cases, was not based on adequate land use planning. The result was the intense fragmentation of the landscape, causing the destruction and fragmentation of forest habitats, which were restricted to small and isolated remnants. In this sense, the present study promoted an analysis of the environmental quality of vegetation fragments in the sub-basins of Ribeirão Anhumas, Campinas, São Paulo, Brazil by calculating and interpreting the circularity index (CI), in order to define the format of the fragments, connectivity/isolation and the use and occupation of the environment as well as area and location, in order to promote the diagnosis and identification of priority areas for the implementation of restoration and environmental management actions. It was identified, therefore, that the remaining vegetation of the upper, middle and lower sub-basins is divided between small and medium unconnected fragments of which 56.2% and 24.2% presented an elongated and moderately elongated shape, respectively, and, therefore, high susceptibility to external interference and edge effects. On the other hand, high urbanization evidenced mainly in the high-level limits forest management projects, since the fragments are surrounded by built areas.

Keywords

urbanization, remaining vegetation, environmental indicators