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Full-Text Articles in Life Sciences

Mollusc Assemblages Of Soft-Sediments In Subtropical Eastern Australia, Jennifer Marshall Jan 2018

Mollusc Assemblages Of Soft-Sediments In Subtropical Eastern Australia, Jennifer Marshall

Theses

Despite the dominance of soft-sediment habitats in marine ecosystems, their associated assemblages are often poorly understood in comparison to their counterparts in habitats such as reef. Baseline characterisation of habitats and communities is necessary to inform managers of the ecological resources they are charged with conserving. In New South Wales (NSW), Australia, a habitat classification scheme (HCS) is employed based on habitat types and water depth to inform conservation planning which aims to be comprehensive, adequate, and representative. This thesis evaluates the suitability of the HCS for soft-sediment by comparing mollusc assemblages spatially and temporally within two NSW marine parks.


Studies On The Ecology Of The Endangered Camaenid Land Snail Thersites Mitchellae (Cox, 1864), Jonathan Leslie Parkyn Jan 2014

Studies On The Ecology Of The Endangered Camaenid Land Snail Thersites Mitchellae (Cox, 1864), Jonathan Leslie Parkyn

Theses

Many Australian land snail species are assumed to have declined in distribution and abundance, but there are few quantitative data available to assess their conservation status. Thersites mitchellae (Cox, 1864) (Camaenidae) is listed as endangered (category ENC2a) on the IUCN 1997 Red List of Threatened Species. Population parameters such as abundance, probability of survival, and probability of site occupancy were estimated. The methods take detection probability into account and allow for the inclusion of sampling, habitat, and individual animal covariates. These models and techniques offer considerable scope for application to land snail conservation particularly for species at risk of extinction.


The Natural History, Conservation Status And Ecology Of The Eastern Pygmy-Possum (Cercartetus Nanus), Jamie Mark Harris Jan 2010

The Natural History, Conservation Status And Ecology Of The Eastern Pygmy-Possum (Cercartetus Nanus), Jamie Mark Harris

Theses

Many populations of Australian wildlife appear to be diminishing as human activities rapidly encroach on natural areas. Modern conservation efforts seek to provide management solutions, focussing particularly on those species that are officially classed as threatened. However, knowledge of the true status of most species is glaringly incomplete, with fundamental information about distribution and abundance yet to be properly assembled. Hence, there is an increasing need for applied research, particularly on the under-studied species, to assist efforts to conserve wildlife. The eastern pygmy-possum (Cercartetus nanus) provides a good example of a species that requires further study, particularly because it is ...


Dynamics Of Tree Diversity In Undisturbed And Logged Subtropical Rainforest In Australia, R Geoff B. Smith, J Doland Nichols, Jerome K. Vanclay Jan 2005

Dynamics Of Tree Diversity In Undisturbed And Logged Subtropical Rainforest In Australia, R Geoff B. Smith, J Doland Nichols, Jerome K. Vanclay

School of Environment, Science and Engineering Papers

In subtropical rainforest in eastern Australia, changes in the diversity of trees were compared under natural conditions and eight silvicultural regimes over 35 years. In the treated plots basal area remaining after logging ranged from 12 to 58 m2 per ha. In three control plots richness differed little over this period. In the eight treated plots richness per plot generally declined after intervention and then gradually increased to greater than original diversity. After logging there was a reduction in richness per plot and an increase in species richness per stem in all but the lightest selective treatments. The change in ...