Publications by authors named "Stewart L Macdonald"

Australia's 2019-2020 mega-fires were exacerbated by drought, anthropogenic climate change and existing land-use management. Here, using a combination of remotely sensed data and species distribution models, we found these fires burnt ~97,000 km of vegetation across southern and eastern Australia, which is considered habitat for 832 species of native vertebrate fauna. Seventy taxa had a substantial proportion (>30%) of habitat impacted; 21 of these were already listed as threatened with extinction.

View Article and Find Full Text PDF
Article Synopsis
  • A new species of rock-dwelling gecko named Gehyra electrum sp. nov. has been identified in the Einasleigh Uplands of north Queensland, Australia.
  • This species is characterized by its medium size (46-50 mm), unique color pattern with orange-brown to pinkish-orange background, and distinct physical traits, including subdigital lamellae and a wedge-shaped mental scale.
  • Gehyra electrum is a rock specialist found exclusively in granite outcrops of the Mt Surprise area, contributing to the increasing diversity of endemic reptiles in the region.
View Article and Find Full Text PDF

The impact of climate change may be felt most keenly by tropical ectotherms. In these taxa, it is argued, thermal specialization means a given shift in temperature will have a larger effect on fitness. For species with limited dispersal ability, the impact of climate change depends on the capacity for their climate-relevant traits to shift.

View Article and Find Full Text PDF

Understanding the climatic drivers of local adaptation is vital. Such knowledge is not only of theoretical interest but is critical to inform management actions under climate change, such as assisted translocation and targeted gene flow. Unfortunately, there are a vast number of potential trait-environment combinations, and simple relationships between trait and environment are ambiguous: representing either plastic or evolved variation.

View Article and Find Full Text PDF