17 Works

Assessing the benefits and risks of translocations in depauperate species: a theoretical framework with an empirical validation

Elise Furlan, Bernd Gruber, Catherine Attard, Robert Wager, Adam Kerezsy, Leanne Faulks, Luciano Beheregaray & Peter Unmack
1. Conservation translocations are becoming more common to assist in the management of threatened native species. While many translocation programs focus on maximizing survival in newly established populations, consideration is also required for the persistence of source populations. 2. Here, we present and test a theoretical framework that assesses the translocation trade-off between increasing a species probability of survival and decreasing a species’ overall genetic diversity. We anticipate that i) the genetic diversity of translocated...

Globally, plant-soil feedbacks are weak predictors of plant abundance

Kurt Reinhart, Jonathan Bauer, Sarah McCarthy-Neumann, Andrew MacDougall, José Hierro, Mariana Chiuffo, Scott Mangan, Johannes Heinze, Joana Bergmann, Jasmin Joshi, Richard Duncan, Jeff Diaz, Paul Kardol, Gemma Rutten, Markus Fischer, Wim Van Der Putten, T. Bezemer & John Klironomos
Plant-soil feedbacks (PSFs) have been shown to strongly affect plant performance under controlled conditions, and PSFs are thought to have far reaching consequences for plant population dynamics and the structuring of plant communities. However, thus far the relationship between PSF and plant species abundance in the field is not consistent. Here, we synthesize PSF experiments from tropical forests to semiarid grasslands, and test for a positive relationship between plant abundance in the field and PSFs...

Data from: Historical demography and climate driven distributional changes in a widespread Neotropical freshwater species with high economic importance

Manolo Perez, Ezequiel Oliveira, Luiz Bertollo, Carla Gestich, Petr Rab, Tariq Ezaz, Fernando Souza, Patrik Viana, Eliana Feldberg, Edivaldo Herculano Correa De Oliveira & Marcelo Cioffi
The Neotropical region exhibits the greatest worldwide diversity and the diversification history of several clades is related to the puzzling geomorphologic and climatic history of this region. The freshwater Amazon ecoregion contains the main hydrographic basins of the Neotropical region that are highly dendritic and ecologically diverse. It contains a rich and endemic fish fauna, including one of its most iconic and economically important representatives, the bony-tongue Arapaima gigas (Teleostei, Osteoglossiformes). Here, we evaluated the...

Data from: The genetic architecture of maternal effects across ontogeny in the red deer

Julie Gauzere, Craig A. Walling, Josephine M. Pemberton, Loeske E. B. Kruuk, Sean Morris & Alison Morris
Maternal effects, either environmental or genetic in origin, are an underappreciated source of phenotypic variance in natural populations. Maternal genetic effects have the potential to constrain or enhance the evolution of offspring traits depending on their magnitude and their genetic correlation with direct genetic effects. We estimated the maternal effect variance and its genetic component for twelve traits expressed over the life-history in a pedigreed population of wild red deer (morphology, survival/longevity, breeding success). We...

Data from: Phylogeography of the Cran’s bully Gobiomorphus basalis (Gobiiformes: Eleotridae) and an analysis of species boundaries within the New Zealand radiation of Gobiomorphus

James Shelley, Bruno David, Christine Thacker, Andy Hicks, Matt Jarvis & Peter Unmack
New Zealand has a complex recent history of climatic and tectonic change that has left variable signatures in the geographic distribution and genetic structure of the region’s flora and fauna. To identify concordant patterns, a broad range of taxa must be examined and compared. In New Zealand’s North Island, a consensus is forming as to the dominant biogeographic barriers in the region although obligate freshwater taxa have not been considered in this framework. We use...

Phylogenomics of monitor lizards and the role of competition in dictating body size disparity

Ian Brennan, Alan R. Lemmon, Emily Moriarty Lemmon, Daniel M. Portik, Valter Weijola, Luke Welton, Stephen C. Donnellan & J. Scott Keogh
Organismal interactions drive the accumulation of diversity by influencing species ranges, morphology, and behavior. Interactions vary from agonistic to cooperative and should result in predictable patterns in trait and range evolution. However, despite a conceptual understanding of these processes, they have been difficult to model, particularly on macroevolutionary timescales and across broad geographic spaces. Here we investigate the influence of biotic interactions on trait evolution and community assembly in monitor lizards (Varanus). Monitors are an...

High elevation increases the risk of Y chromosome loss in Alpine skink populations with sex reversal

Arthur Georges, Duminda Dissanayake, Clare Holleley & Janine Deakin
The view genotypic sex determination (GSD) and environmental sex determination (ESD) are mutually exclusive states has been contradicted by the discovery that chromosomal sex and environmental influences can co-exist within the same species, hinting at a continuum of intermediate states. Systems where genes and the environment interact to determine sex present the opportunity for sex reversal to occur, where the phenotypic sex is the opposite of that predicted by their sex chromosome complement. The skink...

Data from: Identifying error and accurately interpreting eDNA metabarcoding results: a case study to detect vertebrates at arid zone waterholes

Elise M. Furlan, Jenny Davis & Richard P. Duncan
Environmental DNA (eDNA) metabarcoding surveys enable rapid, non-invasive identification of taxa from trace samples with wide-ranging applications from characterising local biodiversity to identifying food-web interactions. However, the technique is prone to error from two major sources: i) contamination through foreign DNA entering the workflow, and ii) misidentification of DNA within the workflow. Both types of error have the potential to obscure true taxon presence or to increase taxonomic richness by incorrectly identifying taxa as present...

Resource pulses influence the spatio-temporal dynamics of a large carnivore population

Femke Broekhuis, Nicholas Elliot, Kosiom Keiwua, Kelvin Koinet, David Macdonald, Niels Mogensen, David Thuo & Arjun Gopalaswamy
Resource availability is a key component in animal ecology, yet the manner in which carnivore populations respond to spatial and temporal fluctuations of resources remains unclear. We take a population-level approach to determine how resource pulses, in this case a temporary hyper-abundance of prey, influence the densities and space-use of cheetahs Acinonyx jubatus. The Maasai Mara in Kenya experiences an annual migration of > 1.4 million wildebeest Connochaetes taurinus and large numbers of zebras Equus...

Latitudinal variation in climate-associated genes imperils range-edge populations

Steve Smith, Chris Brauer, Minami Sasaki, Peter Unmack, Gilles Guillot, Martin Laporte, Louis Bernatchez & Luciano Beheregaray
The ecological impacts of increasing global temperatures are evident in most ecosystems on Earth, but our understanding of how climatic variation influences natural selection and adaptive resilience across latitudes is still largely unknown. Latitudinal gradients allow testing general ecosystem-level theories relevant to climatic adaptation. We assessed differences in adaptive diversity of populations along a latitudinal region spanning highly variable temperate to subtropical climates. We generated and integrated large-scale information from environmental mapping, phenotypic variation and...

Data from: Snakeskin gourami (Trichopodus pectoralis) exhibits XX/XY sex determination and putative young Y chromosome shares sex chromosomal linkage homologies with those of amniotes

Thitipong Panthum Panthum, Nacarats Laopichienpong, Ekaphan Kraichak, Worapong Singchat, Dung Ho My Nguyen, Nattakan Ariyaphong, Syed Farhan Ahmad, Narongrit Muangmai, Surin Peyachoknagul, Tariq Ezaz & Kornsorn Srikulnath
Snakeskin gourami (Trichopodus pectoralis) is one of the most common air-breathing freshwater fish of the Indochina peninsula. It has a high meat yield and is one of the top five aquaculture freshwater fish in Thailand. However, it takes 2–3 years for adults to reach sexual maturity. Snakeskin gourami is not externally sexually dimorphic and its sex determination remains unknown, complicating many aspects of broodstock management including sex manipulation. Understanding the sex determination system will contribute...

Climate change, sex reversal, and lability of sex determining systems

Lisa Schwanz, Arthur Georges, Clare Holleley & Stephen Sarre
Sex reversal at high temperatures during embryonic development (e.g. ZZ females) provides the opportunity for new genotypic crosses (e.g. ZZ male x ZZ female). This raises the alarming possibility that climatic warming could lead to the loss of an entire chromosome – one member of the sex chromosome pair (the Y or W) – and the transition of populations to environmental sex determination (ESD). Here we examine the evolutionary dynamics of sex-determining systems exposed to...

Genome-wide SNP analysis of Siamese cobra (Naja kaouthia) reveals the molecular basis of transitions between Z and W sex chromosomes and supports the presence of an ancestral super-sex chromosome in amniotes

Nararat Laopichienpong, Ekaphan Kraichak, Worapong Singchat, Siwapech Sillapaprayoon, Narongrit Muangmai, Sunutcha Suntrarachun, Sudarath Baicharoen, Surin Peyachoknagul, Lawan Chanhome, Tariq Ezaz & Kornsorn Srikulnath
Elucidation of the process of sex chromosome differentiation is necessary to understand the dynamics of evolutionary mechanisms in organisms. The Siamese cobra (Naja kaouthia) exhibits ZZ/ZW heteromorphic sex chromosomes. The W sex chromosome contains a large number of repeats and shares several amniote sex chromosomal linkages. In conjunction with recent advances in high-throughput sequencing, Diversity Arrays Technology (DArTseq™) provides an effective approach to identify sex-specific loci that are epoch-making, to understand the dynamics of molecular...

Pleistocene divergence in the absence of gene flow among populations of a viviparous reptile with intraspecific variation in sex determination

Peta Hill, Erik Wapstra, Tariq Ezaz & Christopher Burridge
Polymorphisms can lead to speciation if there is differential mating success among conspecifics divergent for a trait. Polymorphism for sex determining system might be particularly expected to isolate gene pools, given strong selection for the production of viable males and females and the low success of heterogametic hybrids when sex chromosomes differ (Haldane’s rule). We investigated this question using a rare example of a species exhibiting polymorphism for sex determination: the viviparous snow skink Carinascincus...

Spatial, climate and ploidy factors drive genomic diversity and resilience in the widespread grass Themeda triandra

Collin Ahrens, Elizabeth A. James, Adam D. Miller, Ferguson Scott, Nicola C. Aitken, Ashley W. Jones, Patricia Lu‐Irving, Justin O. Borevitz, David J. Cantrill & Paul D. Rymer
This data set was used to assess the climate resilience of Themeda triandra, a foundational species and the most widespread plant in Australia, by assessing the relative contributions of spatial, environmental, and ploidy factors to contemporary genomic variation. Reduced-representation genome sequencing on 472 samples from 52 locations was used to test how the distribution of genomic variation, including ploidy polymorphism, supports adaptation to hotter and drier climates.

Evolving thermal thresholds explain the distribution of temperature sex reversal in an Australian dragon lizard

Meghan Castelli, Arthur Georges, Caitlin Cherryh, Dan Rosauer, Stephen Sarre, Isabella Contador-Kelsall & Clare Holleley
Aim: Species with temperature-dependent sex determination (TSD) are particularly vulnerable to climate change because a resultant skew in population sex ratio can have severe demographic consequences and increase vulnerability to local extinction. The Australian central bearded dragon (Pogona vitticeps) has a thermosensitive ZZ male/ZW female system of genetic sex determination (GSD). High incubation temperatures cause reversal of the ZZ genotype to a viable female phenotype. Nest temperatures in the wild are predicted to vary on...

Data from: Plotting for change: an analytic framework to aid decisions on which lineages are candidate species in phylogenomic species discovery

Arthur Georges, Peter Unmack, Mark Adams, Michael Hammer, Jerald Johnson, Bernd Gruber, André Gilles & Matthew Young
A recent study argued that coalescent-based models of species delimitation mostly delineate population structure not species, and called for the validation of candidate species using biological information additional to the genetic information, such as phenotypic or ecological data. Here we introduce a framework to interrogate genomic datasets and coalescent-based species trees for the presence of candidate species in situations where additional biological data are unavailable, unobtainable, or uninformative. For de novo genomic studies of species...

Registration Year

  • 2020
    17

Resource Types

  • Dataset
    17

Affiliations

  • University of Canberra
    17
  • Commonwealth Scientific and Industrial Research Organisation
    3
  • University of Adelaide
    2
  • Australian National University
    2
  • Flinders University
    2
  • Kasetsart University
    2
  • Arkansas State University
    1
  • Queen Saovabha Memorial Institute
    1
  • University of Wollongong
    1
  • Federal University of São Carlos
    1