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Environmental and Anthropogenic Impacts on Avifaunal Assemblages in an Urban Parkland, 1976 to 2007.

Ormond SE, Whatmough R, Hudson IL, Daniels CB - Animals (Basel) (2014)

Bottom Line: Resident parkland birds demonstrated significant declines in abundance.Native and introduced species also exhibited long-term declines in species richness and abundance throughout the 32-year period.Cycles of varying time periods indicated fluctuations in avian biodiversity demonstrating the need for future monitoring and statistical analyses on bird communities in the Adelaide City parklands.

View Article: PubMed Central - PubMed

Affiliation: School of Natural and Built Environments, University of South Australia, Mawson Lakes Campus, P.O. Box 2471, Adelaide, SA 5000, Australia. sara.ormond@sa.gov.au.

ABSTRACT
Urban environments are unique, rapidly changing habitats in which almost half of the world's human population resides. The effects of urbanisation, such as habitat (vegetation) removal, pollution and modification of natural areas, commonly cause biodiversity loss. Long-term ecological monitoring of urban environments is vital to determine the composition and long-term trends of faunal communities. This paper provides a detailed view of long-term changes in avifaunal assemblages of the Adelaide City parklands and discusses the anthropogenic and environmental factors that contributed to the changes between 1976 and 2007. The Adelaide City parklands (ACP) comprise 760 ha of land surrounding Adelaide's central business district. Naturalist Robert Whatmough completed a 32-year survey of the ACP to determine the structure of the urban bird community residing there. Annual species richness and the abundance of birds in March and September months were analysed. Linear regression analysis was applied to species richness and abundance data of each assemblage. Resident parkland birds demonstrated significant declines in abundance. Native and introduced species also exhibited long-term declines in species richness and abundance throughout the 32-year period. Cycles of varying time periods indicated fluctuations in avian biodiversity demonstrating the need for future monitoring and statistical analyses on bird communities in the Adelaide City parklands.

No MeSH data available.


Related in: MedlinePlus

Total Species Richness in March and September months (combined).
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animals-04-00119-f002: Total Species Richness in March and September months (combined).

Mentions: The avian assemblage declined over the 32 year period and, especially declined in years 2005 to 2007 (Figure 2). The measure of species richness was used as a diversity index in order to outline the long-term changes in species richness of Adelaide parkland birds. In the Adelaide City parklands from the years 1976 to 2007 the diversity of avifaunal species richness fluctuated from 45 species to 78 species (Figure 2). The mean species richness of birds was 68 (±1.209) species. 1978 saw the highest species richness with 78 species present in the parklands (Figure 2). The lowest measure of species richness was recorded in 2004 revealing only 45 recorded species. Linear regression analysis indicated a highly significant, negative relationship between species richness and the 32-year study period (R2 = 0.439, Sig. ≤ 0.001). Overall the species richness of birds recorded in the Adelaide City parklands shared a highly significant, strong, negative relationship with the 32-year time period.


Environmental and Anthropogenic Impacts on Avifaunal Assemblages in an Urban Parkland, 1976 to 2007.

Ormond SE, Whatmough R, Hudson IL, Daniels CB - Animals (Basel) (2014)

Total Species Richness in March and September months (combined).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4494304&req=5

animals-04-00119-f002: Total Species Richness in March and September months (combined).
Mentions: The avian assemblage declined over the 32 year period and, especially declined in years 2005 to 2007 (Figure 2). The measure of species richness was used as a diversity index in order to outline the long-term changes in species richness of Adelaide parkland birds. In the Adelaide City parklands from the years 1976 to 2007 the diversity of avifaunal species richness fluctuated from 45 species to 78 species (Figure 2). The mean species richness of birds was 68 (±1.209) species. 1978 saw the highest species richness with 78 species present in the parklands (Figure 2). The lowest measure of species richness was recorded in 2004 revealing only 45 recorded species. Linear regression analysis indicated a highly significant, negative relationship between species richness and the 32-year study period (R2 = 0.439, Sig. ≤ 0.001). Overall the species richness of birds recorded in the Adelaide City parklands shared a highly significant, strong, negative relationship with the 32-year time period.

Bottom Line: Resident parkland birds demonstrated significant declines in abundance.Native and introduced species also exhibited long-term declines in species richness and abundance throughout the 32-year period.Cycles of varying time periods indicated fluctuations in avian biodiversity demonstrating the need for future monitoring and statistical analyses on bird communities in the Adelaide City parklands.

View Article: PubMed Central - PubMed

Affiliation: School of Natural and Built Environments, University of South Australia, Mawson Lakes Campus, P.O. Box 2471, Adelaide, SA 5000, Australia. sara.ormond@sa.gov.au.

ABSTRACT
Urban environments are unique, rapidly changing habitats in which almost half of the world's human population resides. The effects of urbanisation, such as habitat (vegetation) removal, pollution and modification of natural areas, commonly cause biodiversity loss. Long-term ecological monitoring of urban environments is vital to determine the composition and long-term trends of faunal communities. This paper provides a detailed view of long-term changes in avifaunal assemblages of the Adelaide City parklands and discusses the anthropogenic and environmental factors that contributed to the changes between 1976 and 2007. The Adelaide City parklands (ACP) comprise 760 ha of land surrounding Adelaide's central business district. Naturalist Robert Whatmough completed a 32-year survey of the ACP to determine the structure of the urban bird community residing there. Annual species richness and the abundance of birds in March and September months were analysed. Linear regression analysis was applied to species richness and abundance data of each assemblage. Resident parkland birds demonstrated significant declines in abundance. Native and introduced species also exhibited long-term declines in species richness and abundance throughout the 32-year period. Cycles of varying time periods indicated fluctuations in avian biodiversity demonstrating the need for future monitoring and statistical analyses on bird communities in the Adelaide City parklands.

No MeSH data available.


Related in: MedlinePlus