Back to Search
Start Over
Temporal and spatial variability of breeding in Australian birds and the potential implications of climate change
- Source :
- Emu - Austral Ornithology. 111:283-291
- Publication Year :
- 2011
- Publisher :
- Informa UK Limited, 2011.
-
Abstract
- Climate change has profound implications for biodiversity worldwide. To understand its effects on Australia’s avifauna, we need to evaluate the effects of annual climatic variability and geographical climate gradients. Here, we use national datasets to examine variation in breeding of 16 species of common and widespread Australian landbirds, in relation to four variables: altitude, latitude, year and the Southern Oscillation Index. Analysis of >30 years of nesting records confirmed that breeding was generally later in colder altitudes and latitudes (geographic variation), but was not consistently related to year or the Southern Oscillation Index (temporal variation). However, power to detect expected temporal effects was low. The timing of breeding became significantly earlier with year only in south-eastern Australia. In contrast, an index of breeding activity (the proportion of atlas records for a species for which breeding was reported) increased with increasing winter values of the Southern Oscillation Index (generally wetter conditions) for all 16 species across Australia. This suggests that annual fluctuations in rainfall can have dramatic and immediate effects on breeding, even for largely sedentary, seasonally breeding species. If, as expected, climate change creates drier conditions over much of Australia, we predict a marked negative effect on bird breeding.
- Subjects :
- 0106 biological sciences
Ecology
Biodiversity
Climate change
Biology
010603 evolutionary biology
01 natural sciences
010605 ornithology
Latitude
Altitude
Animal Science and Zoology
Spatial variability
Conservation biology
Ornithology
Southern Hemisphere
Ecology, Evolution, Behavior and Systematics
Nature and Landscape Conservation
Subjects
Details
- ISSN :
- 14485540 and 01584197
- Volume :
- 111
- Database :
- OpenAIRE
- Journal :
- Emu - Austral Ornithology
- Accession number :
- edsair.doi...........a74ac45284d5d98fd5893805b432307d