A study of the relationships between urban park structure and avian communities in the parks of Tainan City
| Autor: | Chia-Tsung Hung, 洪嘉聰 |
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| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 We determine, through circular plot method survey in 19 urban parks in Tainan City, how birds of different species and guilds respond to urban environment. Biodiversity indices (richness, relative abundance, evenness, Shannon-Weiner diversity index, Margalef’s richness index) were also used to characterize the avian community. There are two main categories of environmental factors used in this study: interior environment (including landscape structure, habitat characteristics, and human interference) and the peripheral environment (including urban land use intensity, and vegetation coverage) of the park. Birds of different species may respond to different scales of environmental factors. Therefore, multiple scales of urban land use intensity and vegetation coverage were calculated. However, owing to the relatively small scales investigated in this study, highly colinearity made it hard to distinguish which of the scales do birds respond to most significantly. Satellite image data was used to discriminate the vegetated area surrounding the park. Information of the RED and NIR (near infra-red) spectral bands was drawn out from the remote sensing data to derive the NDVI value (Normalized Difference Vegetation Index, p.22). The number of pixels with NDVI value higher than 0.2 is used as the index of vegetated area surrounding the park. The conclusions of this study is that: (1) among single factors, the park area can best explain the variations between species richness; (2) the building area surrounding the park affects the avian communities significantly, and different bird species or guilds respond differently; (3) when the vegetated area surrounding the park increases, few bird species increases substantially, thus causing the evenness and diversity to decrease; (4) the effect of the vegetation diversity in the park on avian community is not significant. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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