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Titolo:
RANKING CONSERVATION AND TIMBER MANAGEMENT OPTIONS FOR LEADBEATERS POSSUM IN SOUTHEASTERN AUSTRALIA USING POPULATION VIABILITY ANALYSIS
Autore:
LINDENMAYER DB; POSSINGHAM HP;
Indirizzi:
AUSTRALIAN NATL UNIV,CTR RESOURCE & ENVIRONM STUDIES CANBERRA ACT 0200 AUSTRALIA UNIV LONDON IMPERIAL COLL SCI & TECHNOL,CTR POPULAT BIOL ASCOT SL5 7PY BERKS ENGLAND UNIV ADELAIDE,DEPT APPL MATH ADELAIDE SA 5005 AUSTRALIA
Titolo Testata:
Conservation biology
fascicolo: 1, volume: 10, anno: 1996,
pagine: 235 - 251
SICI:
0888-8892(1996)10:1<235:RCATMO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONTANE ASH FORESTS; SOUTH-EAST AUSTRALIA; HOLLOW-BEARING TREES; CENTRAL HIGHLANDS; GYMNOBELIDEUS-LEADBEATERI; ARBOREAL MARSUPIALS; WILDLIFE CORRIDORS; VICTORIA; ABUNDANCE; REQUIREMENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
D.B. Lindenmayer e H.P. Possingham, "RANKING CONSERVATION AND TIMBER MANAGEMENT OPTIONS FOR LEADBEATERS POSSUM IN SOUTHEASTERN AUSTRALIA USING POPULATION VIABILITY ANALYSIS", Conservation biology, 10(1), 1996, pp. 235-251

Abstract

The conservation of the endangered Leadbeater's Possum, Gymnobelideusleadbeateri is one of the most contentious forestry issues in Australia. The challenge is to identify strategies to conserve the species inthe significant portion of its range in the central highlands of Victoria (southeastern Australia) where timber harvesting occurs. We used ALEX, a simulation program for population viability analysis to explore the effectiveness of potential forest management strategies to enhance the Persistence of G. leadbeateti in areas of wood production. Our study focused on the relationship between the risk of metapopulation extinction and (1) the number and spatial arrangement of 50-ha logging areas that could be reserved from timber harvesting and (2) the impacts of postfire salvage logging in reserved areas We modeled complex patch structures within two forest blocks (Murrindindi and Steavenson) that were based on maps of both existing patches of suitable habitat forG. leadbeateri and the location of potential logging areas We recorded high values for the probability of extinction of metapopulations of G. leadbeateri when existing strategies for the conservation of the species within the Murrindindi and Steavenson Forest Blocks were modeledExclusion of salvage logging operations from burned, old-growth forests significantly improved the species' prospects of survival in both the short and long term. Withdrawal of timber harvesting from some proposed logging coupes made a significant, positive long-term contribution to metapopulation persistence. But there will be a delay of at least150 years until areas set aside note maize a significant contributionto metapopulation persistence. This is the time required for existingstands of regrowth to develop old-growth characteristics that are an essential habitat component for G. leadbeateri We examined the effectiveness of different designs for setting aside a total reserved area of300 ha. These ranged from a single 300 ha reserve to 12, 25-ha reserves Populations in smaller reserves were vulnerable to extinction frontdemographic stochasticity and environmental variability. Conversely, a small number of larger reserves were susceptible to destruction in asingle, catastrophic wildfire, highlighting the need for several dispersed reserves. Analyses of the sensitivity of various management options to variations in fire frequency and extent, movement capability and a wide range of other factors indicated that the conservation strategy that gave the best relative outcome for G. leadbeateri was both to set aside several 50 to 100-ha reserves in every forest block and to preclude post-fire salvage logging operations from these areas if they burned in a wildfire.

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Documento generato il 16/07/20 alle ore 18:46:44