The vegetation requirements of Superb Fairy-wrens (Malurus cyaneus) in non-urban edge and urbanised habitats
Holly Parsons A C , Kristine French A and Richard E. Major BA Institute for Conservation Biology and Law, School of Biological Sciences, University of Wollongong, Northfields Ave, Wollongong, NSW 2520, Australia.
B Terrestrial Ecology, Australian Museum, 6 College St, Sydney, NSW 2010, Australia.
C Corresponding author. Email: hmp04@uow.edu.au
Emu 108(4) 283-291 https://doi.org/10.1071/MU07060
Submitted: 11 October 2007 Accepted: 13 August 2008 Published: 23 October 2008
Abstract
Urbanisation has created an environment with a broad spectrum of habitats of differing quality for birds. Understanding habitat characteristics is necessary for effective conservation of species in urban environments. We investigated the vegetation requirements of a small, shrub-nesting, Australian bird, the Superb Fairy-wren (Malurus cyaneus), and the relative quality of urban habitats in the Illawarra region of New South Wales. Vegetation was assessed in three different habitats: suburban sites within Superb Fairy-wren territories (n = 20 sites), suburban sites where Fairy-wrens were absent (n = 20), and rural–woodland edge in which Fairy-wrens were present (n = 17). This third habitat represents a habitat assumed to be the best possible habitat for this species within the landscape. We analysed structure and floristics of the vegetation. The three habitats were significantly different from each other both in vegetation structure and floristic composition. While there was some variability in habitat selection in suburban areas, Superb Fairy-wrens were largely restricted to areas that have a dense layer of native shrubs surrounding grassy areas. They were absent from suburban sites where there were either few shrubs in total or sites with exotic shrubs, regardless of abundance. It was predicted that non-suburban habitats (habitat located on the rural–remnant edge) would be of a higher quality than suburban habitats (habitat within residential housing) owing to a prevalence of native vegetation. However, these sites were dominated by a single exotic species, Lantana (Lantana camara). Despite this plant replacing native vegetation, it was an important habitat feature. Either this plant or native shrubs must be available for this species to colonise a site.
Bass, D. A. (1995). The contribution of introduced fruits to the winter diet of Pied Currawongs in Armidale, NSW. Corella 19, 127–132.
Case, T. J. (1996). Global patterns in the establishment and distribution of exotic birds. Biological Conservation 78, 69–96.
| Crossref | GoogleScholarGoogle Scholar |
Catterall, C. P. , Green, R. J. , and Jones, D. N. (1989). Occurrences of birds in relation to plants in a subtropical city. Australian Wildlife Research 16, 289–305.
| Crossref | GoogleScholarGoogle Scholar |
Chan, K. , and Augusteyn, J. D. (2003). Relationship between bird-unit size and territory quality in three species of fairy-wrens (Malurus sp.) with overlapping territories. Ecological Research 18, 73–80.
| Crossref | GoogleScholarGoogle Scholar |
Clergeau, P. , Croci, S. , Jokimäki, J. , Kaisanlahti-Jokimäki, M. , and Dinetti, M. (2006). Avifauna homogenisation by urbanisation: analysis at different European latitudes. Biological Conservation 127, 336–344.
| Crossref | GoogleScholarGoogle Scholar |
Green, D. M. , and Baker, M. G. (2002). Urbanization impacts on habitat and bird communities in a Sonoran desert ecosystem. Landscape and Urban Planning 968, 1–15.
Hohtola, E. (1978). Differential changes in bird community structure with urbanisation: a study in central Finland. Ornis Scandinavica 9, 94–100.
| Crossref | GoogleScholarGoogle Scholar |
Sandström, U. G. , Angelstam, P. , and Mikusinski, G. (2006). Ecological diversity of birds in relation to the structure of urban green space. Landscape and Urban Planning 77, 39–53.
| Crossref | GoogleScholarGoogle Scholar |
van Horne, B. (1983). Density as a misleading indicator of habitat quality. Journal of Wildlife Management 47, 893–901.
| Crossref | GoogleScholarGoogle Scholar |
Walcott, C. F. (1974). Changes in bird life in Cambridge, Massachusetts from 1860 to 1964. Auk 91, 151–160.
With, K. A. , Gardner, R. H. , and Turner, M. G. (1997). Landscape connectivity and population distributions in heterogeneous environments. Oikos 78, 151–169.
| Crossref | GoogleScholarGoogle Scholar |