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Journal of BirdLife Australia
RESEARCH ARTICLE

The influence of ENSO and rainfall on the numbers of breeding pairs in a woodland bird community from south-eastern Australia

R. Marchant A D , S. Guppy B and M. Guppy C
+ Author Affiliations
- Author Affiliations

A Museum Victoria, GPO Box 666, Melbourne, Vic. 3001, Australia.

B 1708 Maulbrooks Road, Moruya, NSW 2537, Australia.

C Division of Evolution, Ecology and Genetics, Research School of Biology, ANU College of Medicine, Biology & Environment, Canberra, ACT 0200, Australia.

D Corresponding author. Email: rmarch@museum.vic.gov.au

Emu 116(3) 254-261 https://doi.org/10.1071/MU15087
Submitted: 31 August 2015  Accepted: 25 December 2015   Published: 18 February 2016

Abstract

Climate and rainfall in southern Australia are strongly influenced by the El Nino–Southern Oscillation (ENSO) phenomenon. If breeding of forest birds is related to rainfall, then ENSO may influence fluctuations in breeding activity. We recorded the numbers of breeding pairs of 17 species over 17 years on a 10 ha forest plot near Moruya, NSW, in order to evaluate the influence of ENSO (as measured by the Southern Oscillation Index, SOI) and rainfall on yearly changes in breeding activity. The mean SOI for the months April–July immediately before the breeding season (August–January) was strongly correlated with the change in number of breeding pairs (D) from year to year: r = 0.82, P < 0.001. D was also strongly correlated with rainfall (August to December) during breeding: r = 0.84, P < 0.001. A positive SOI resulted in >300 mm rainfall during breeding and a positive D value; a negative SOI resulted in <300 mm of rain and a negative D value. SOI was a better predictor because it was less subject to the extreme variation shown by rainfall. This is the first time an association between breeding and SOI has been shown for forest birds in temperate Australia.

Additional keywords: change in numbers of breeding pairs, rainfall during breeding, SOI.


References

Austin, M. P. (1978). Vegetation. In ‘Volume 2, Biophysical Background Studies, Land Use on the South Coast of NSW’ (Ed. R. H.Gunn); pp. 44–66. (CSIRO: Melbourne.)

Bell, H. L. (1985). Seasonal variation and the effects of drought on the abundance of arthropods in savanna woodland on the Northern Tablelands of New South Wales. Australian Journal of Ecology 10, 207–221.
Seasonal variation and the effects of drought on the abundance of arthropods in savanna woodland on the Northern Tablelands of New South Wales.Crossref | GoogleScholarGoogle Scholar |

Bureau of Meteorology (2015). S.O.I. (Southern Oscillation Index) Archives – 1876 to present. Available at http://www.bom.gov.au/climate/current/soihtm1.shtml (Verified 12 August 2015).

Holmes, R. T. (2007). Understanding population change in migratory songbirds: long-term and experimental studies of Neotropical migrants in breeding and wintering areas. The Ibis 149, 2–13.
Understanding population change in migratory songbirds: long-term and experimental studies of Neotropical migrants in breeding and wintering areas.Crossref | GoogleScholarGoogle Scholar |

Lake, P. S. (2011). ‘Drought and Aquatic Ecosystems: Effects and Responses.’ (Wiley-Blackwell: UK)

Legendre, P., and Legendre, L. (1998). ‘Numerical Ecology’. 2nd edn. (Elsevier: Amsterdam.)

MacNally, R., Bennett, A. F., Thomson, J. R., Radford, J. Q., Unmack, G., Horrocks, G., and Vesk, P. A. (2009). Collapse of an avifauna: climate change appears to exacerbate habitat loss and degradation. Diversity & Distributions 15, 720–730.
Collapse of an avifauna: climate change appears to exacerbate habitat loss and degradation.Crossref | GoogleScholarGoogle Scholar |

Marchant, S. (1992). A Bird Observatory at Moruya, NSW 1975–84. Occasional Publication No. 1. Eurobodalla Natural History Society, Moruya.

Nicholls, N. (1991). The El Niño/Southern Oscillation and Australian vegetation. Vegetatio 91, 23–36.
The El Niño/Southern Oscillation and Australian vegetation.Crossref | GoogleScholarGoogle Scholar |

Nott, M. P., Desante, D. F., Siegel, R. B., and Pyle, P. (2002). Influences of the El Nino/Southern Oscillation and the North Atlantic Oscillation on avian productivity in forests of the Pacific Northwest of North America. Global Ecology and Biogeography 11, 333–342.
Influences of the El Nino/Southern Oscillation and the North Atlantic Oscillation on avian productivity in forests of the Pacific Northwest of North America.Crossref | GoogleScholarGoogle Scholar |

Pearce-Higgins, J. W., Eglington, S. M., Martay, B., and Chamberlain, D. E. (2015). Drivers of climate change impacts on bird communities. Journal of Animal Ecology 84, 943–954.
Drivers of climate change impacts on bird communities.Crossref | GoogleScholarGoogle Scholar | 25757576PubMed |

Recher, H. F., and Davis, W. F. (2014). Response of birds to episodic summer rainfall in the Great Western Woodlands, Western Australia. Australian Zoologist 37, 206–224.
Response of birds to episodic summer rainfall in the Great Western Woodlands, Western Australia.Crossref | GoogleScholarGoogle Scholar |

Recher, H. F., Majer, J. D., and Ganesh, S. (1996a). Seasonality of canopy invertebrate communities in eucalypt forests of eastern and western Australia. Australian Journal of Ecology 21, 64–80.
Seasonality of canopy invertebrate communities in eucalypt forests of eastern and western Australia.Crossref | GoogleScholarGoogle Scholar |

Recher, H. F., Majer, J. D., and Ganesh, S. (1996b). Eucalypts, arthropods and birds: on the relation between foliar nutrients and species richness. Forest Ecology and Management 85, 177–195.
Eucalypts, arthropods and birds: on the relation between foliar nutrients and species richness.Crossref | GoogleScholarGoogle Scholar |

Selwood, K. E., Clarke, R. H., Cunningham, S. C., Lada, H., McGeoch, M. A., and MacNally, R. (in press). A bust but no boom: responses of floodplain bird assemblages during and after prolonged drought. Journal of Animal Ecology , .
A bust but no boom: responses of floodplain bird assemblages during and after prolonged drought.Crossref | GoogleScholarGoogle Scholar |

Serventy, D. L., and Whittell, H. M. (1962). ‘Birds of Western Australia’. (Paterson Brokensha: Perth.)

Stenseth, N. C., Ottersen, G., Hurrell, J. W., Mysterud, A., Lima, M., Chan, K., Yoccoz, N. G., and Adlandsvick, B. (2003). Studying climate effects on ecology through the use of climate indices: the North Atlantic Oscillation, El Nino Southern Oscillation and beyond. Proceedings of the Royal Society B: Biological Sciences 270, 2087–2096.
Studying climate effects on ecology through the use of climate indices: the North Atlantic Oscillation, El Nino Southern Oscillation and beyond.Crossref | GoogleScholarGoogle Scholar | 14561270PubMed |

Stevens, H. C., and Watson, D. M. (2013). Reduced rainfall explains avian declines in an unfragmented landscape: incremental steps toward an empty forest? Emu 113, 112–121.
Reduced rainfall explains avian declines in an unfragmented landscape: incremental steps toward an empty forest?Crossref | GoogleScholarGoogle Scholar |

van de Pol, M., Brouwer, L., Brooker, L. C., Brooker, M. G., Colombelli-Negrel, D., Hall, M. L., Langmore, N., Peters, A., Pruett-Jones, S., Russell, E. M., Webster, M. S., and Cockburn, A. (2013). Problems with using large-scale oceanic climate indices to compare climatic sensitivities across populations and species. Ecography 36, 249–255.
Problems with using large-scale oceanic climate indices to compare climatic sensitivities across populations and species.Crossref | GoogleScholarGoogle Scholar |

Woinarski, J. C. Z., and Cullen, J. M. (1984). Distribution of invertebrates on foliage in forests of south-eastern Australia. Australian Journal of Ecology 9, 207–232.
Distribution of invertebrates on foliage in forests of south-eastern Australia.Crossref | GoogleScholarGoogle Scholar |