A5018474450- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Species Distribution and Climate Change
- Fire effects on ecosystems
- Rangeland and Wildlife Management
- Wildlife Ecology and Conservation
- Genetic diversity and population structure
- Plant Parasitism and Resistance
- Pasture and Agricultural Systems
- Invertebrate Taxonomy and Ecology
- Botany, Ecology, and Taxonomy Studies
- Plant Water Relations and Carbon Dynamics
- Botany and Plant Ecology Studies
- Plant Diversity and Evolution
- Geology and Paleoclimatology Research
- Software System Performance and Reliability
- Forest ecology and management
- Seed Germination and Physiology
- Forest Management and Policy
- Coastal wetland ecosystem dynamics
- Advancements in Photolithography Techniques
- Forest Ecology and Biodiversity Studies
- Ecology and biodiversity studies
- Software Engineering and Design Patterns
- Conservation, Biodiversity, and Resource Management
Department of Biodiversity, Conservation and Attractions
2018-2022
Parks and Wildlife Service
2013-2017
Australian National University
2014
University of Waterloo
2014
Bentley (Canada)
2007-2009
ON Semiconductor (United States)
2007
Murdoch University
1995-2000
Commonwealth Scientific and Industrial Research Organisation
1995-2000
Australian National Herbarium
2000
MaxEnt is a program for modelling species distributions from presence-only records. This paper written ecologists and describes the model statistical perspective, making explicit links between structure of model, decisions required in producing modelled distribution, knowledge about data that might affect those decisions. To begin we discuss characteristics data, highlighting implications distributions. We particularly focus on problems sample bias lack information prevalence. The keystone...
Aim Identifying and protecting refugia is a priority for conservation under projected anthropogenic climate change, because of their demonstrated ability to facilitate the survival biota adverse conditions. Refugia are habitats that components biodiversity retreat to, persist in can potentially expand from changing environmental However, study discussion has often been ad hoc descriptive nature. We therefore: (1) provide habitat-based concept refugia, (2) evaluate methods identification...
Restoring degraded land to combat environmental degradation requires the collection of vast quantities germplasm (seed). Sourcing this material raises questions related provenance selection, seed quality and harvest sustainability. Restoration guidelines strongly recommend using local sources maximize adaptation prevent outbreeding depression, but in highly modified landscapes restricts small remnants where limited, poor is available, harvesting impacts may be high. We review three...
Abstract Aim Investigate the relative abilities of different bioclimatic models and data sets to project species ranges in novel environments utilizing natural experiment biogeography provided by Australian Acacia species. Location Australia, South Africa. Methods We built for cyclops pycnantha using two discriminatory correlative (M ax E nt Boosted Regression Trees) a mechanistic niche model (CLIMEX). fitted training sets: native‐range only (‘restricted’) all available global excluding...
Abstract Aim Seed traits related to recruitment have direct relevance for plant fitness and persistence. Trait variation in time among populations may increase species resilience ultimately reduce the risk of extinction. However, patterns among‐population critical remain poorly known are often disregarded when considering extinction under future climates. Location Global. Methods In this paper we review synthesize current knowledge about physiological morphological recruitment. We outline...
Abstract Aim To quantify the impact of 2019–2020 megafires on Australian plant diversity by assessing burnt area across 26,062 species ranges and effects fire history recovery potential. Further, to exemplify a strategic approach prioritizing affected for actions conservation planning at national scale. Location Australia. Methods We combine data geographic range, extent, response traits assess proportion in both fires past. Results Across Australia, suitable habitat 69% all was (17,197...
With large wildfires becoming more frequent1,2, we must rapidly learn how megafires impact biodiversity to prioritize mitigation and improve policy. A key challenge is discover interactions among fire-regime components, drought land tenure shape wildfire impacts. The globally unprecedented3,4 2019–2020 Australian burnt than 10 million hectares5, prompting major investment in monitoring. Collated data include responses of 2,000 taxa, providing an unparalleled opportunity quantify affect...
Abstract This study investigated the impacts of livestock grazing on native plant species cover, litter soil surface condition, physical and chemical properties, hydrology, near ground microclimate in remnant Eucalyptus salmonophloia F. Muell woodlands. Vegetation surveys were undertaken three woodlands with a history regular little or no grazing. Livestock was associated decline perennial cover an increase exotic annual reduced cryptogam loss microtopography, increased erosion, changes...
Fragmentation of natural vegetation is one the most pervasive changes in terrestrial ecosystems across Earth. Developing a general understanding how fragmentation affects plant and animal populations essential to meet pressing need for guidelines management fragmented systems. Nevertheless, this has take account differences ecosystem types different biogeographic, evolutionary ecological backgrounds against which impacts are played out parts world. Here, we examine on by considering...
Abstract Models that couple habitat suitability with demographic processes offer a potentially improved approach for estimating spatial distributional shifts and extinction risk under climate change. Applying such an to five species of Australian plants contrasting traits, we show that: (i) predicted climate‐driven changes in range area are sensitive the underlying model, regardless whether traits their interaction patch configuration modeled explicitly; (ii) caution should be exercised when...
Abstract Woodlands dominated by Eucalyptus spp. in temperate southeastern and southwestern Australia have been extensively cleared for agriculture are often badly degraded livestock grazing. This has resulted the loss of biodiversity widespread land degradation. The continuing decline these woodlands become a concern conservation biodiversity, there is growing interest among farmers, managers, researchers developing techniques restoring them. Currently few scientific guidelines exist...
Abstract Aim To determine the potential combined effects of climate change and land transformation on modelled geographic ranges Banksia . Location Mediterranean South West Australian Floristic Region (SWAFR). Methods We used species distribution modelling software M axent to relate current environmental conditions occurrence data for 18 species, subsequently made spatial predictions using two simple dispersal scenarios (zero universal), three climate‐severity at 2070, taking impacts...
Abstract Increasing evidence shows that anthropogenic climate change is affecting biodiversity. Reducing or stabilizing greenhouse gas emissions may slow global warming, but past will continue to contribute further unavoidable warming for more than a century. With obvious signs of difficulties in achieving effective mitigation worldwide the short term at least, sound scientific predictions future impacts on biodiversity be required guide conservation planning and adaptation. This especially...
Severe impacts on biodiversity are predicted to arise from climate change. These may not be adequately addressed by conventional approaches conservation. As a result, additional management actions now being considered. However, there is currently limited guidance help decision makers choose which set of (and in what order) most appropriate for species that considered vulnerable. Here, we provide framework the full complement aimed at conserving under change ongoing conservation existing...
Abstract Habitat fragmentation can significantly affect mating and pollen dispersal patterns in plant populations, although the differential effects of various aspects are poorly understood. In this study, we used eight microsatellite loci to investigate effect on system within one large small population remnants Banksia sphaerocarpa var. caesia , a bird‐pollinated shrub southern agricultural region Western Australia. The had much larger neighbourhood size lower selfing rate, maternal pool...
Abstract Aim Granite outcrops are prominent throughout the world and harbour many endemic species. Their topographic complexity range of environments have led to hypothesis that they act as refugia facilitating persistence species through climate change. We evaluate this by investigating phylogeographic patterns in a common granite shrub. Location S outhwest A ustralian F loristic R egion. Methods Chloroplast haplotypes 89 K unzea pulchella individuals from 16 were determined sequences three...
Abstract Mallee‐heath and mallee communities occur in a mosaic across large areas of south‐western Australia, topographically subdued fire‐prone landscapes. Consequently, it could be expected that these would have historically experienced similar fire regimes, respond similarly to variation aspects the regime. We studied response mallee‐heath time since last fire, measuring species density, species–area relationships, diversity indices vegetation structure. Floristic responses accorded with...
Background and Aims Low-altitude mountains constitute important centres of diversity in landscapes with little topographic variation, such as the Southwest Australian Floristic Region (SWAFR). They also provide unique climatic edaphic conditions that may allow them to function refugia. We investigate whether Porongurups (altitude 655 m) SWAFR will a refugium for endemic Ornduffia calthifolia O. marchantii under forecast climate change. Methods used species distribution modelling based on...
Abstract Aim Megafire events generate immediate concern for wildlife and human well‐being, but their broader ecological impacts likely extend beyond individual species single fire events. In the first mechanistic study of effects focussed on ecosystems, we aimed to assess sensitivity exposure ecosystems multiple fire‐related threats, placing in context changing regimes interactions with other threats. Location Southern eastern Australia. Time period 2019–2020. Major studied Australian...
Abstract Pollen dispersal was investigated in six populations of Calothamnus quadrifidus , a bird‐pollinated shrub the fragmented agricultural region southern Western Australia. Paternity analysis using microsatellite loci identified pollen source within for 67% seedlings, and remainder were assumed to have arisen from sources outside populations. Outcrossing variable, ranging 5% 82%, long‐distance observed all with up 43% sourced over distances 5 km. This extensive immigration positively...