Research Data

(Pachycephala griseiceps) - current and future species distribution models


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(Pachycephala griseiceps) - current and future species distribution models
Date Record Created
Date Record Modified
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Date Coverage
1990-01-01 to 2085-12-31
Time Period
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Geospatial Location
  • Continental Australia
  1. Type: brief

    This dataset consists of current and future species distribution models generated using 4 Representative Concentration Pathways (RCPs) carbon emission scenarios, 18 global climate models (GCMs), and 8 time steps between 2015 and 2085, for (Pachycephala griseiceps).

  2. Type: full

    Observation records were filtered from the Atlas of Living Australia's (ALA) database based on ALA's 'assertions', expert-derived range polygons and expert opinion, and those observations inappropriate for modelling were excluded. Only species with >20 unique spatiotemporal records were used for modelling.

    Current climate was sourced as monthly precipitation and temperature minima and maxima from 1975 until 2005 at a 0.05° grid scale from the Australian Water Availability Project (AWAP - (Jones et al 2007, Grant et al 2008).

    Future climate projections were sourced through a collaboration with Drs Rachel Warren and Jeff Price, Tyndall Centre, University of East Anglia, UK. This data is available on Although new GCM runs for RCPs have not been fully completed, several research groups have implemented methods to utilize knowledge gained from SRES predictions to recreate predictions for the new RCPs using AR4 GCMs (e.g., Meinshausen, Smith et al. 2011; Rogelj, Meinshausen et al. 2012). The methods used to generate the GCM predictions for the RCP emission scenarios are defined at and in associated publications (Mitchell and Jones 2005; Warren, de la Nava Santos et al. 2008; Meinshausen, Raper et al. 2011). This data was downscaled to 0.05 degrees (~5km resolution) using a cubic spline of the anomalies; these anomalies were applied to a current climate baseline of 1976 to 2005 – climate of 1990 – generated from aggregating monthly data from Australia Water Availability Project (AWAP; These monthly temperature and precipitation values user used to create 19 standard bioclimatic variables. These bioclimatic variables are listed at All downscaling and bioclimatic variable creation was done using the climates package (VanDerWal, Beaumont et al. 2011) in R (

    Used in the modelling were annual mean temperature, temperature seasonality, max and min monthly temperature, annual precipitation, precipitation seasonality, and precipitation of the wettest and driest quarters for current and all RCP scenarios (RCP3PD, RCP45, RCP6, RCP85) at 8 time steps between 2015 and 2085.

    Species distribution models were run using the presence-only modelling program Maxent (Phillips et al 2006). Maxent uses species presence records to statistically relate species occurrence to environmental variables on the principle of maximum entropy. All default settings were used except for background point allocation. We used a target group background (Phillips & Dudik 2008) to remove any spatial or temporal sampling bias in the modelling exercise.

  3. Type: note

    These species distribution models are displayed on Edgar:

    The dataset is a tarred, zipped file (.tar.gz), approximately 5GB in size and contains 609 ASCII grid files:

    • 1 current distribution map
    • 32 median maps - 8 time step median maps (averaged across all 18 GCMs) for each RCP
    • 576 maps - 8 time step maps for each GCM for each RCP
Related Publications
  1. Maximum entropy modelling of species geographic distributions
Related Websites
  1. Maxent software and further information
  2. Edgar - bird occurrence record data vetting interface
  3. ALA - Species page for (Pachycephala griseiceps)
Related Data
  1. Derived from: >> All future climate layers for Australia
    • ID:
  2. Part of: >> Current and Future Distribution Models for Australian Bird Species
    • ID:
Related Services
  1. Is produced by: >> Edgar: Climate Change Impact on the Distributions of Australian Bird Species
    • ID:
Technical metadata
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  1. Managed by: Dr Jeremy Vanderwal , Centre for Tropical Biodiversity and Climate Change
Primary Contact
Dr Jeremy Vanderwal,
(no information)
  1. Atlas of Living Australia;
Fields of Research
  1. Terrestrial Ecology (060208)
Socio-Economic Objective
  1. Climate Change Models (960303)
  1. geographic information system
  2. spatial data
  3. spatial analysis
  4. climate change
  5. GIS
Research Activity
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Research Themes
Tropical Ecosystems, Conservation and Climate Change
CC BY: Attribution 3.0 AU
License - Other
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Access Rights/Conditions
Open Access. If the data is not available via the provided link, please contact an associated party (preferably the Manager if specified) for access.
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Data Location
Online Locations
  1. griseiceps)/projected-distributions
Stored At
A/Prof Jeremy VanDerWal, Centre for Tropical Biodiversity & Climate Change, James Cook University, Building 145, ATSIP, James Cook University Drive, Townsville, QLD, 4811, Australia
Vanderwal, J. (2013). (Pachycephala griseiceps) - current and future species distribution models. Centre for Tropical Biodiversity & Climate Change, James Cook University. (dataset). griseiceps)/suitability