Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior Agrária >
Ambiente e Recursos Naturais >
ARN - Artigos em Revistas Indexados ao ISI >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/1241

Title: Functional heterogeneity of forest landscapes and the distribution and abundance of the red-cockaded woodpecker
Authors: Azevedo, João
Jack, Steven B.
Coulson, Robert N.
Wunneburger, Douglas F.
Keywords: Dispersal movements
Forest management
Functional heterogeneity
GIS
RCW-Red-cockaded woodpecker
Spatially explicit analysis
Issue Date: 2000
Publisher: Elsevier
Citation: Azevedo, João; Jack, Steven B.; Coulson, Robert N.; Wunneburger, Douglas F. (2000) - Functional heterogeneity of forest landscapes and the distribution and abundance of the red-cockaded woodpecker. Forest Ecology and Management. ISSN 0378-1127. 127:1-3, p. 271-283
Abstract: Red-cockaded woodpecker (RCW, Picoides borealis) populations are greatly affected by the fragmentation of forest habitat through its effect on the dispersal of individuals between active clusters and other areas of the suitable habitat. In order to assess the suitability of a given landscape structure for the maintenance and expansion of RCW populations, land managers need an index that correlates with the bird's awareness of that structure. Rather than assuming that common landscape metrics provide the necessary information, we applied an index of functional heterogeneity to a GIS coverage for the western portion of the Sam Houston National Forest (SHNF) in east Texas, using two observation scales. In contrast to measured heterogeneity, functional heterogeneity incorporates the RCW response to forest structure. The GIS coverage included information on habitat suitability and RCW cluster distribution and size. The analyses indicated that the presence of cavity trees is the most important factor for RCW population maintenance and that fragmentation of the foraging habitat has much less impact. The analyses also indicated that many areas that are currently of high functional importance for the RCW are effectively isolated from one another. This second result has signi®cant implications for the dispersal of individuals between areas of high functionality and thus also the maintenance of the RCW in this forest. The functional heterogeneity analyses can also be used to examine the trade offs involved in managing the multiple wildlife species simultaneously and for examining the effects of various harvesting regimes through time.
URI: http://hdl.handle.net/10198/1241
ISSN: 0378-1127
Appears in Collections:ARN - Artigos em Revistas Indexados ao ISI

Files in This Item:

File Description SizeFormat
363.pdf730.33 kBAdobe PDFView/Open
Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 


  © Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE