A study of habitat fragmentation in Southeastern Brazil using remote sensing and geographic information systems (GIS)

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dc.contributor.authorJorge, LAB
dc.contributor.authorGarcia, G. J.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:23:57Z
dc.date.available2014-05-20T15:23:57Z
dc.date.issued1997-10-22
dc.description.abstractThe purpose of this work was to study fragmentation of forest formations (mesophytic forest, riparian woodland and savannah vegetation (cerrado)) in a 15,774-ha study area located in the Municipal District of Botucatu in Southeastern Brazil (São Paulo State). A land use and land cover map was made from a color composition of a Landsat-5 thematic mapper (TM) image. The edge effect caused by habitat fragmentation was assessed by overlaying, on a geographic information system (GIS), the land use and land cover data with the spectral ratio. The degree of habitat fragmentation was analyzed by deriving: 1. mean patch area and perimeter; 2. patch number and density; 3. perimeter-area ratio, fractal dimension (D), and shape diversity index (SI); and 4. distance between patches and dispersion index (R). In addition, the following relationships were modeled: 1. distribution of natural vegetation patch sizes; 2. perimeter-area relationship and the number and area of natural vegetation patches; 3. edge effect caused by habitat fragmentation, the values of R indicated that savannah patches (R = 0.86) were aggregated while patches of natural vegetation as a whole (R = 1.02) were randomly dispersed in the landscape. There was a high frequency of small patches in the landscape whereas large patches were rare. In the perimeter-area relationship, there was no sign of scale distinction in the patch shapes, In the patch number-landscape area relationship, D, though apparently scale-dependent, tends to be constant as area increases. This phenomenon was correlated with the tendency to reach a constant density as the working scale was increased, on the edge effect analysis, the edge-center distance was properly estimated by a model in which the edge-center distance was considered a function of the to;al patch area and the SI. (C) 1997 Elsevier B.V. B.V.en
dc.description.affiliationUNIV ESTADUAL PAULISTA,IGCE,CEAPLA,BR-13500230 RIO CLARO,SP,BRAZIL
dc.description.affiliationUnespUNIV ESTADUAL PAULISTA,IGCE,CEAPLA,BR-13500230 RIO CLARO,SP,BRAZIL
dc.format.extent35-47
dc.identifierhttp://dx.doi.org/10.1016/S0378-1127(97)00072-8
dc.identifier.citationForest Ecology and Management. Amsterdam: Elsevier B.V., v. 98, n. 1, p. 35-47, 1997.
dc.identifier.doi10.1016/S0378-1127(97)00072-8
dc.identifier.issn0378-1127
dc.identifier.urihttp://hdl.handle.net/11449/34625
dc.identifier.wosWOS:A1997YE09400003
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofForest Ecology and Management
dc.relation.ispartofjcr3.169
dc.relation.ispartofsjr1,625
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectlandscape ecologypt
dc.subjectfragmentation of natural forest formationspt
dc.subjectedge effectpt
dc.subjectfractalspt
dc.subjectfractal dimensionpt
dc.subjectfractal modelspt
dc.subjectremote sensingpt
dc.subjectgeographic information systempt
dc.subjectvegetation indicespt
dc.titleA study of habitat fragmentation in Southeastern Brazil using remote sensing and geographic information systems (GIS)en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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Rio Claro - CEAPLA - Centro de Análise e Planejamento Ambiental