Variation in intraspecific demography drives localised concordance but species-wide discordance in responses to Plio-Pleistocene climatic changeSean Buckley, Chris Brauer, Peter Unmack, Michael Hammer & Luciano Beheregaray
Understanding how species biology may facilitate resilience to climate change remains a critical factor in detecting and protecting species at risk of extinction. Many studies have focused on the role of particular ecological traits in driving species responses, but less so on demographic history and levels of standing genetic variation. We used environmental and genomic datasets to reconstruct the phylogeographic histories of two ecologically similar and largely co-distributed freshwater fishes to assess the degree of...
Sex-specific splicing of Z- and W-borne nr5a1 alleles suggests sex determination is controlled by chromosome conformationXiuwen Zhang, Susan Wagner, Clare Holleley, Janine Deakin, Kazumi Matsubara, Ira Deveson, Deni O'Meally, Hardip Patel, Tariq Ezaz, Zhao Li, Chexu Wang, Melanie Edwards, Jennifer Marshall Graves & Arthur Georges
Pogona vitticeps has female heterogamety (ZZ/ZW) but the master sex determining gene is unknown, as is the case for all reptiles. We show that nr5a1, a gene that is essential in mammalian sex determination, has alleles on the Z and W chromosomes (Z-nr5a1 and W-nr5a1), which are both expressed and can recombine. Three transcript isoforms of Z-nr5a1 were detected in gonads of adult ZZ males, two of which encode a functional protein. However, ZW females...
Niche partitioning overrides interspecific competition to determine plant species distributions along a nutrient gradientElizabeth Wandrag, Jane Catford & Richard Duncan
Changes in some combination of niche availability, niche overlap and the strength of interspecific interactions are thought to drive changes in plant composition along resource gradients. However, because these processes are difficult to measure in the field, their relative importance in driving compositional change in plant communities remains unclear. In an Australian temperate grassland, we added seeds of three native and three exotic grasses to 1,875 experimental plots in a way that allowed us to...
Data from: Leaf litter breakdown along an elevational gradient in Australian alpine streamsLloyd Werry, Mirco Bundschuh, Simon Mitrovic, Richard Lim & Ben Kefford
These data were generated to investigate the rate of leaf litter breakdown and how temperature and other factors such as microbial and and invertebrate activities were influenced over elevational and temporal gradients. Breakdown of allochthonous organic matter is a central step in nutrient cycling in stream ecosystems. There is concern that increased temperatures from climate change will alter the breakdown rate of organic matter with important consequences for ecosystem functioning of alpine streams. Dried leaves...
Detection of Khapra Beetle environmental DNA using portable technologies in Australian biosecurityAlejandro Trujillo-González, Alejandro Trujillo-González, David Thuo, Uday Divi, Kate Sparks, Thomas Wallenius & Dianne Gleeson
Khapra beetle, Trogoderma granarium Everts, 1898, is a serious pest of stored grain products globally. Environmental DNA (eDNA)-based methods offer sensitive detection tools used to inform biosecurity officers on the presence of high-risk pests. This study tested laboratory and portable molecular technologies to detect khapra beetle environmental DNA extracted from dust samples collected during biosecurity responses (Tuggeranong and Fyshwick) to khapra beetle incursions in Australia. Airborne and floor dust samples were collected opportunistically using handheld...
Data from: Optimising the hatching success of artificially incubated eggs for use in a conservation program for the western saw-shelled turtle (Myuchelys bellii)Louise Streeting, Deborah Bower, Martin Dillon, Phil Spark, Michael Gough, Adam Skidmore, Paul McDonald, Hannah Delaney, Adrienne Burns, Sandy Watson, Duminda Dissanayake, Arthur Georges & Donald McKnight
Artificial incubation of eggs and the release of hatchlings into the wild is a common conservation intervention designed to augment threatened turtle populations. We investigate a range of incubation temperatures to establish an optimal temperature for maximum hatching success of western saw-shelled turtle (Myuchelys bellii) eggs. We report on the influence of incubation temperature on incubation duration and hatching success and describe two experimental incubation methods which, for the same incubation temperature, resulted in 77%...
Experimental habitat fragmentation disrupts host-parasite interaction over decades via life-cycle bottlenecksMatthew Bitters, Matthew Bitters, Jacqui Meyers, Julian Resasco, Stephen Sarre, Kika Tuff & Kendi Davies
Habitat loss and fragmentation are likely to seriously impact parasites, a less studied but critical component of ecosystems, yet we lack long-term experimental evidence. Parasites structure communities, increase connectivity in food webs, and account for a large proportion of an ecosystem’s total biomass. Food web models predict that parasites with multiple obligate hosts are at greater risk of extinction because the local extinction, or reduction in abundance, of any host will result in a life-cycle...
University of Canberra7
La Trobe University2
Australian National University1
Garvan Institute of Medical Research1
University of Koblenz and Landau1
King's College London1
University of New England1
University of Colorado Boulder1
Department of Agriculture, Water and the Environment1