Genetic effects of habitat contraction on Lumholtz's tree-kangaroo (Dendrolagus lumholtzi) in the Australian Wet Tropics

Lumholtz's tree-kangaroo (Dendrolaguslumholtzi) is one of two species oftree-kangaroo resident in the tropicalrainforests of north-eastern Australia. Thespecies is confined to the Wet Tropics region,with its distribution centred on the AthertonTablelands. While D. lumholtzi wasexposed to period...

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Veröffentlicht in:Conservation genetics 2002-01, Vol.3 (1), p.59
Hauptverfasser: Bowyer, Jocelyn C, Newell, Graeme R, Eldridge, Mark Db
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description Lumholtz's tree-kangaroo (Dendrolaguslumholtzi) is one of two species oftree-kangaroo resident in the tropicalrainforests of north-eastern Australia. Thespecies is confined to the Wet Tropics region,with its distribution centred on the AthertonTablelands. While D. lumholtzi wasexposed to periodic large-scale climaticfluctuations during the Quaternary that haveeffectively acted as natural fragmentationevents, the species is currently under pressurefrom anthropogenic disturbance and habitatfragmentation. This study aimed to assess thelevel of genetic diversity in D.lumholtzi by examining hypervariablemicrosatellite loci and the control region ofmitochondrial DNA (mtDNA) in 21 individualsfrom a single 20 ha forest fragment, and from afurther 24 animals collected throughout theAtherton Tablelands. Results suggest that D. lumholtzi has relatively low levels ofgenetic diversity which is uniformlydistributed throughout the Atherton Tablelands;a pattern congruent with data from many othervertebrates endemic to the Australian WetTropics. It is suggested that Pleistoceneclimatic fluctuations, which resulted inlarge-scale rainforest contractions, haveimposed an ancient population bottleneck on theancestral D. lumholtzi population. Theapparent over-riding influence of thesenatural, historical effects on the geneticstructure of D. lumholtzi populations,will complicate attempts to assess the geneticimpact of current anthropogenic habitat lossand fragmentation.[PUBLICATION ABSTRACT]
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subjects Anthropogenic factors
Genetic diversity
Genetic effects
Habitat loss
Quaternary
Rainforests
Tropical environments
title Genetic effects of habitat contraction on Lumholtz's tree-kangaroo (Dendrolagus lumholtzi) in the Australian Wet Tropics
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