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Title: Functional heterogeneity of red-cockaded woodpecker habitat in the Sam Houston National Forest: insights for management
Author: Azevedo, João
Jack, Steven B.
Coulson, Robert N.
Wunneburger, Douglas F.
Keywords: Red-cockaded woodpecker
Functional heterogeneity
Landscape metrics
Sam Houston National Forest
Issue Date: 1997
Publisher: Society of American Foresters
Citation: Azevedo, João; Jack, S.B.; Coulson, R.N.; Wunneburger, D.F. (1997) - Functional heterogeneity of red-cockaded woodpecker habitat in the Sam Houston National Forest: insights for management. In First Biennial North American Forest Ecology Workshop. Raleigh. USA
Abstract: Red-cockaded woodpecker (RCW, Picoides borealis) populations are greatly affected by the fragmentation of forest habitat through the effect on dispersal between active clusters and the other 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 perception of that structure. Rather than assuming that the application of the most common landscape metrics will provide the necessary information, we applied three indices of functional heterogeneity (as opposed to measured heterogeneity) to a GIS coverage of the Raven District of the Sam Houston National Forest using two observable scales. The GIS coverage included information on habitat suitability and RCW cluster distribution and size. The analysis 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 analysis also indicated that many areas currently of high functional importance for the RCW are effectively isolate from on another. This second result has significant implications for dispersal of individuals between areas of high functionality and this also the maintenance of RCW in this forest.
Peer review: yes
Appears in Collections:ARN - Resumos em Proceedings Não Indexados ao ISI/Scopus

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