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RESEARCH ARTICLE
Contents Vol 33(7)

Comparison of foraging behaviour of small, urban-sensitive insectivores in continuous woodland and woodland remnants in a suburban landscape

P. Hodgson A , K. French A C and R. E. Major B
+ Author Affiliations
- Author Affiliations

A School of Biological Sciences, University of Wollongong, Wollongong, NSW 2522, Australia.

B Australian Museum, 6 College Street, Sydney, NSW 2010, Australia.

C Corresponding author. Email: kris@uow.edu.au

Wildlife Research 33(7) 591-603 https://doi.org/10.1071/WR05017
Submitted: 14 February 2005  Accepted: 13 September 2006   Published: 15 November 2006

Abstract

Small patches of remnant vegetation are often considered to have low conservation value. In urban landscapes their value may potentially be higher than in other landscapes because they can be the only representatives of original native vegetation. Despite this potential, many small insectivorous birds that rely on native vegetation demonstrate sensitivities within urban landscapes through reduced numbers or total absence. One reason for this sensitivity may be that remnants are of suboptimal quality, which may be reflected in behavioural changes. Using five insectivorous species that were present (in low numbers) in remnants surrounded by high-density housing, foraging behaviour was examined in relation to vegetation. The proportion of time birds spent on different foraging substrates and plant species was compared with that of conspecifics in continuous vegetation. Canopy and shrub foragers showed minimal behavioural changes. Ground foragers in remnants tended to forage at lower heights than those in continuous vegetation; however, these changes did not appear to reflect a negative effect. These changes were partially explained by structural differences between vegetation in remnants and continuous sites. The number of times a bird attacked prey items was significantly higher in continuous habitat for only two species. Overall, the foraging behaviour of small insectivorous birds in remnants surrounded by high-density housing was not adversely affected by urbanisation and it appears that remnants have potential value as habitat and foraging sources in an urban landscape. Despite this, small insectivores are still sensitive to urbanisation, suggesting that other factors, probably in the matrix, are important.


Acknowledgments

We thank Greg Gowing for invaluable database advice. Logistical field assistance from environmental staff of Wyong Shire Council, especially David Tierney, is much appreciated. This research, financially supported by an APAI grant through the University of Wollongong, the Australian Museum and Wyong Shire Council, forms part of a Ph.D. program for PH.


References

Allen, A. P. , and O’Connor, R. J. (2000). Interactive effects of land use and other factors on regional bird distributions. Journal of Biogeography 27, 889–900.
| Crossref | GoogleScholarGoogle Scholar | Anon.  (2000). State of the environment Wyong shire council 1999/2000 Council report, Wyong Shire Council, Wyong, NSW.

Beissinger, S. R. , and Osborne, D. R. (1982). Effects of urbanization on avian community organization. Condor 84, 75–83.
Bell H. L. (1985). The social organization and foraging behaviour of three syntopic thornbills Acanthiza spp. In ‘Birds of Eucalypt Forests and Woodlands: ecOlogy, Conservation, Management’. (Eds A. Keast, H. F. Recher, H. A. Ford and D. A. Saunders.) pp. 151–163. (Surrey Beatty: Sydney.)

Bell, H. L. , and Ford, H. A. (1990). The influence of food shortage on interspecific niche overlap and foraging behaviour of three species of Australian warblers (Acanthizidae). Studies in Avian Biology 13, 381–388.
Cameron E. (1985). Habitat usages and foraging behaviour of three fantails (Rhipidura: Pachycephalidae). In ‘Birds of Eucalypt Forests and Woodlands: Ecology, Conservation, Management’. (Eds A. Keast, H. F. Recher, H. A. Ford and D. A. Saunders.) pp. 177–179. (Surrey Beatty: Sydney.)

Catterall C. P., Green R. J., and Jones D. N. (1991). Habitat use by birds across a forest suburb interface in Brisbane: implications for corridors. In ‘Nature Conservation 2: The Role of Corridors’. (Eds D. A. Saunders and R. J. Hobbs.) pp. 247–258. (Surrrey Beatty: Sydney.)

Catterall, C. P. , Kingston, M. B. , Park, K. , and Sewell, S. (1998). Deforestation, urbanisation and seasonality: interacting effects on a regional bird assemblage. Biological Conservation 84, 65–81.
| Crossref | GoogleScholarGoogle Scholar | Clarke K. R., and Gorley R. N. (2000). ‘PRIMER v5: User Manual/Tutorial.’ (PRIMER-E Ltd.: Plymouth.)

Clarke K. R., and Warwick R. M. (1994). ‘Changes in Marine Communities: an Approach to Statistical Analysis and Interpretation.’ (Natural Environment Research Council: Bournemouth, UK.)

Clergeau, P. , Savard, J.-P. L. , Mennechez, G. , and Falardeau, G. (1998). Bird abundance and diversity along an urban–rural gradient: a comparison study between two cities on different continents. Condor 100, 413–425.
Forman R. T. T. (1999). Horizontal processes, roads, suburbs, societal objectives and landscape ecology. In ‘Landscape Ecological Analysis: Issues and Applications’. (Eds J. M. Klopatek and R. H. Gardner.) pp. 35–53. (Springer Verlag: New York.)

Forstmeier, W. , and Weiss, I. (2004). Adaptive plasticity in nest-site selection in response to changing predation risk. Oikos 104, 487–499.
| Crossref | GoogleScholarGoogle Scholar | Grabham C., and Klomp N. (2001). The inluence of remnant trees retained within native hardwood plantations on the diversity and abundance of birds. Department of Natural Resources and Environment, Wangaratta, Vic.

Green, R. J. (1984). Native and exotic birds in a suburban habitat. Australian Wildlife Research 11, 181–190.
| Crossref | GoogleScholarGoogle Scholar | Marchant S. (1985). Breeding of the eastern yellow robin Eopsaltria australis. In ‘Birds of Eucalypt Forests and Woodlands: Ecology, Conservation, Management’. (Eds A. Keast, H. F. Recher, H. A. Ford and D. A. Saunders.) pp. 231–240. (Surrey Beatty: Sydney.)

Marzluff, J. M. , and Ewing, K. (2001). Restoration of fragmented landscapes for the conservation of birds: a general framework and specific recommendations for urbanizing landscapes. Restoration Ecology 9, 280–292.
| Crossref | GoogleScholarGoogle Scholar | NPWS (2000). Vegetation survey, classification and mapping. Lower Hunter and Central Coast region. Unpublished report by the NSW National Parks and Wildlife Service for the Lower Hunter and Central Coast Regional Environmental Management Strategy.

Parsons, H. , French, K. , and Major, R. E. (2003). The influence of remnant bushland on the composition of suburban bird assemblages in Australia. Landscape and Urban Planning 66, 43–56.
| Crossref | GoogleScholarGoogle Scholar | Recher H. F., and Holmes R. T. (1985). Foraging ecology and seasonal patterns of abundance in a forest avifauna. In ‘Birds of Eucalypt Forests and Woodlands: Ecology, Conservation, Management’. (Eds A. Keast, H. F. Recher, H. A. Ford and D. A. Saunders.) pp. 79–96. (Surrey Beatty: Sydney.)

Recher, H. F. , and Majer, J. D. (1994). On the selection of tree species by Acanthizidae in open-forest Sydney, New South Wales. Emu 94, 239–245.
Stephens D. W., and Krebs J. R. (1986). ‘Foraging Theory.’ (Princeton University Press: Princeton, NJ.)

Tilghman, N. G. (1987). Characteristics of urban woodlands affecting breeding bird diversity and abundance. Landscape and Urban Planning 14, 481–495.
| Crossref | GoogleScholarGoogle Scholar |

Walters, J. R. , Ford, H. A. , and Cooper, C. B. (1999). The ecological basis of sensitivity of brown treecreepers to habitat fragmentation: a preliminary assessment. Biological Conservation 90, 13–20.
| 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.
| Crossref | GoogleScholarGoogle Scholar |

Wood, K. A. (1995). Temporal and spatial variations in density of landbirds at an urban bushland reserve. Corella 19, 7–11.


Wood, K. A. (1996). Bird assemblages in a small public reserve and adjacent residential area at Wollongong, New South Wales. Wildlife Research 23, 605–620.
| Crossref | GoogleScholarGoogle Scholar |

Zalewski, A. (1994). A comparative study of breeding birds populations and associated landscape character, Torun, Poland. Landscape and Urban Planning 29, 31–41.
| Crossref | GoogleScholarGoogle Scholar |

Zanette, L. (2000). Fragment size and the demography of an area-sensitive songbird. Journal of Animal Ecology 69, 458–470.
| Crossref | GoogleScholarGoogle Scholar |

Zanette, L. , Doyle, P. , and Tremont, S. M. (2000). Food shortage in small fragments: evidence from an area-sensitive passerine. Ecology 81, 1654–1666.
| Crossref | GoogleScholarGoogle Scholar |