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Influence of Landscape Spatial Patterns and Land Use Planning on Grassland Bird Habitat Occupancy in Chester County, Pennsylvania
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Influence of Landscape Spatial Patterns and Land Use Planning on Grassland Bird Habitat Occupancy in Chester County, Pennsylvania. |
| 개인저자 | Warner, M. Zoe. |
| 단체저자명 | University of Pennsylvania. City and Regional Planning. |
| 발행사항 | [S.l.]: University of Pennsylvania., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 224 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-03B. Dissertation Abstract International |
| ISBN | 9781085618465 |
| 학위논문주기 | Thesis (Ph.D.)--University of Pennsylvania, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
Advisor: Daniels, Thomas L. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Throughout their range, North American grassland birds as a group have shown steeper and more widespread population declines than any other avian guild. Grassland bird decline corresponds to habitat loss, landscape fragmentation, agricultural intensification, and changes in land management. In areas where farmland is being converted, the presence or absence of grassland birds can be used to assess the availability of habitat across the landscape. Chester County in southeastern Pennsylvania has historically had an agricultural economic base, but since the 1980s, steady population growth and economic diversification have reduced the amount of available agricultural land in the county. In the last decade, efforts have been underway to slow land conversion and conserve working landscapes. Because Chester County has maintained its working landscapes despite development pressures, the county provides an opportunity to examine the effects of land use change and agricultural preservation on grassland bird occurrence. This dissertation uses fixed-radius point counts of six focal bird species on agricultural land in Chester County to evaluate the influence of landscape spatial patterns and land use planning outcomes on grassland bird habitat occupancy. Separate habitat models are generated for the focal guild and individual species to predict habitat occupancy within a 750 square kilometer area in Chester County's agricultural belt. A landscape diagnosis of spatial patterns quantified by landscape metrics computed for discrete landcover types is developed to assess current landscape spatial patterns and proposed land use initiatives in the county as they relate to grassland bird conservation. The model outcomes and the landscape analysis indicate the grass-cropland network within the study area could provide suitable habitat for grassland birds. The study area has a relatively high level of spatial integrity for a county that has undergone rapid development and a core mixed agricultural area remains. These factors have important implications for the persistence of agricultural land uses and habitat availability for grassland birds. |
| 일반주제명 | Urban planning. Conservation biology. Wildlife conservation. |
| 언어 | 영어 |
| 바로가기 | 
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