Abstract
The Gouldian Finch (Erythrura gouldiae) has experienced significant decline in population and the extent of its range over the past 40 years, which has generally been attributed to the availability of suitable foraging habitat. Less research, however, has investigated the suitability or availability of breeding habitat of the species. Gouldian Finches are obligate cavity nesters, and a recent study has shown that they select nest-sites non-randomly based on structural characteristics of the cavity. Here we investigated the relative effects of different environmental factors on the spatial distribution of Gouldian Finch nests at two different scales. At the broader, landscape scale (over ∼60km2), the strongest predictor of nesting density at a site was the abundance of suitable nest-sites. At the finer scale (∼1km2), no single factor explained the variation in location of nest-sites. Gouldian Finches require areas of habitat characterised by high densities of suitable nest-sites (tree-cavities). Within these patches, individuals are potentially selecting nest-sites based on the morphometry of cavities rather than landscape features such as topography, vegetation or proximity to water. Our findings should be integrated with studies of feeding and habitat requirements in the non-breeding season, with the aim of constructing holistic and predictive habitat-suitability models for this endangered species.
| Language | English |
|---|---|
| Pages | 304-311 |
| Number of pages | 8 |
| Journal | Emu |
| Volume | 111 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2011 |
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Selection of breeding habitat by the endangered Gouldian Finch (Erythrura gouldiae) at two spatial scales. / Brazill-Boast, James; Dessmann, Josephine K.; Davies, Gareth T O; Pryke, Sarah R.; Griffith, Simon C.
In: Emu, Vol. 111, No. 4, 2011, p. 304-311.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Selection of breeding habitat by the endangered Gouldian Finch (Erythrura gouldiae) at two spatial scales
AU - Brazill-Boast, James
AU - Dessmann, Josephine K.
AU - Davies, Gareth T O
AU - Pryke, Sarah R.
AU - Griffith, Simon C.
PY - 2011
Y1 - 2011
N2 - The Gouldian Finch (Erythrura gouldiae) has experienced significant decline in population and the extent of its range over the past 40 years, which has generally been attributed to the availability of suitable foraging habitat. Less research, however, has investigated the suitability or availability of breeding habitat of the species. Gouldian Finches are obligate cavity nesters, and a recent study has shown that they select nest-sites non-randomly based on structural characteristics of the cavity. Here we investigated the relative effects of different environmental factors on the spatial distribution of Gouldian Finch nests at two different scales. At the broader, landscape scale (over ∼60km2), the strongest predictor of nesting density at a site was the abundance of suitable nest-sites. At the finer scale (∼1km2), no single factor explained the variation in location of nest-sites. Gouldian Finches require areas of habitat characterised by high densities of suitable nest-sites (tree-cavities). Within these patches, individuals are potentially selecting nest-sites based on the morphometry of cavities rather than landscape features such as topography, vegetation or proximity to water. Our findings should be integrated with studies of feeding and habitat requirements in the non-breeding season, with the aim of constructing holistic and predictive habitat-suitability models for this endangered species.
AB - The Gouldian Finch (Erythrura gouldiae) has experienced significant decline in population and the extent of its range over the past 40 years, which has generally been attributed to the availability of suitable foraging habitat. Less research, however, has investigated the suitability or availability of breeding habitat of the species. Gouldian Finches are obligate cavity nesters, and a recent study has shown that they select nest-sites non-randomly based on structural characteristics of the cavity. Here we investigated the relative effects of different environmental factors on the spatial distribution of Gouldian Finch nests at two different scales. At the broader, landscape scale (over ∼60km2), the strongest predictor of nesting density at a site was the abundance of suitable nest-sites. At the finer scale (∼1km2), no single factor explained the variation in location of nest-sites. Gouldian Finches require areas of habitat characterised by high densities of suitable nest-sites (tree-cavities). Within these patches, individuals are potentially selecting nest-sites based on the morphometry of cavities rather than landscape features such as topography, vegetation or proximity to water. Our findings should be integrated with studies of feeding and habitat requirements in the non-breeding season, with the aim of constructing holistic and predictive habitat-suitability models for this endangered species.
UR - http://www.scopus.com/inward/record.url?scp=82955194483&partnerID=8YFLogxK
U2 - 10.1071/MU10064
DO - 10.1071/MU10064
M3 - Article
VL - 111
SP - 304
EP - 311
JO - Emu
T2 - Emu
JF - Emu
SN - 0158-4197
IS - 4
ER -