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Modelling the inter-relationships between habitat patchiness, dispersal capability and metapopulationpersistence of the endangered species, Leadbeater's possum, . . . (1996)
| Citations: | 7 - 0 self |
BibTeX
@MISC{Lindenmayer96modellingthe,
author = {D. Lindenmayer and H Possingham},
title = {Modelling the inter-relationships between habitat patchiness, dispersal capability and metapopulationpersistence of the endangered species, Leadbeater's possum, . . .},
year = {1996}
}
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Abstract
A computer simulation model was used to derive estimates of the probability of extinction of populations of the endangered species, Leadbeater's Possum leadbeuteri), inhabiting ensembles of habitat patches within two wood production forest blocks in central Victoria, south-eastern Australia. Data on the habitat patches were extracted from forest inventory information that had been captured in the database of a Geographic Information System Our analyses focussed on a range of issues associated with the size, number and spatial configu- ration of patches of potentially suitable habitat that occur within the Ada and Steavenson Forest Blocks. The sensitivity of extinction risks in these two areas to variations in the movement capability of G. leadbeateri was also examined. Our analyses highlighted major differences in the likelihood of persistence of populations of G. leadbeuteri between the Ada and Steavenson Forest Blocks. These were attributed to differences in the spatial distribution and size of remnant old growth habitat patches as well as the impacts of wildfires. In addition, simulation modelling revealed a different relative contribution of various individual patches, and ensembles of patches, to persistence in the two study areas. In those scenarios for the Ada Forest Block in which the impacts of wildfires were not modelled, our analyses indicated that a few relatively large, linked patches were crucial for the per- sistence of the species and their loss elevated estimates of the probability of extinction to almost 100%.A different outcome was recorded from simulations of the Steavenson Forest Block which, in comparison with the Ada Forest Block, is characterized by larger and more numerous areas of well connected patches of old growth forest and where we incl...
Keyphrases
dispersal capability habitat patchiness steavenson forest block habitat patch ada forest block major difference study area simulation modelling different relative contribution remnant old growth habitat patch wood production forest block south-eastern australia extinction risk numerous area per sistence possum leadbeuteri suitable habitat computer simulation model inventory information movement capability old growth forest various individual patch different outcome spatial distribution central victoria geographic information system spatial configu ration
