Publications by authors named "M Morgan-Richards"

Anthropogenic planetary heating is disrupting global alpine systems, but our ability to empirically measure and predict responses in alpine species distributions is impaired by a lack of comprehensive data and technical limitations. We conducted a comprehensive, semi-quantitative review of empirical studies on contemporary range shifts in alpine insects driven by climate heating, drawing attention to methodological issues and potential biotic and abiotic factors influencing variation in responses. We highlight case studies showing how range dynamics may affect standing genetic variation and adaptive potential, and discuss how data integration frameworks can improve forecasts.

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The Australian brushtail possum (Trichosurus vulpecula) is adapted to a wide range of food plants across its range and is exposed to numerous physiological challenges. Populations that are resistant to the plant toxin sodium fluoroacetate are of particular interest as this compound has been used since the 1940s for vertebrate pest management around the world. Candidate gene identification is an important first step in understanding how spatial populations have responded to local selection resulting in local physiological divergence.

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The Anostostomatidae of Aotearoa New Zealand are well-characterized at the genus and species level, but the higher-level systematics of the family as a whole remain poorly resolved. We tested the hypothesis that the New Zealand anaostostomatid fauna consists of a single monophyletic group consistent with a single common ancestor. For phylogenetic analysis, we sampled the genera in Aotearoa New Zealand as well as representatives of the family from Australia and New Caledonia.

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Article Synopsis
  • Standard metabolic rates (SMR) in ectotherms indicate their energy expenditure for self-maintenance, providing insight into their life-history strategies; a study was conducted on 15 orthopteran species in New Zealand to assess this variation.
  • The research involved measuring SMR using closed-system respirometry at two temperatures, revealing significant differences in metabolic rates among species, and showing that larger body mass correlates with higher oxygen consumption.
  • Contrary to the metabolic cold adaptation (MCA) hypothesis predicting higher SMR in cold-adapted species, the study found lower SMR in insects from higher latitudes and elevations, contributing valuable physiological data for understanding species responses to climate change in New Zealand.
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Article Synopsis
  • Researchers sequenced and analyzed the genomes and transcriptomes of two New Zealand snail species, Potamopyrgus estuarinus and Potamopyrgus kaitunuparaoa, to understand their evolutionary context as relatives of the freshwater snail Potamopyrgus antipodarum.
  • Both species share a similar set of genes related to meiosis and sperm functions, indicating obligate sexual reproduction and laying the groundwork for studying P. antipodarum's unique biological traits, including its sexual and asexual lineages.
  • Though P. kaitunuparaoa appears to be the closest relative to P. antipodarum, significant gene flow through introgression occurs between the two species; however, the mitochondrial genome acts as a
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