Road-network agglomeration, road density, and protected-area fragmentation

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• 作者：Heidi J. Albers ; Amy W. Ando ; Meidan Bu…
• 关键词：Conservation ; Fragmentation ; Agglomeration ; Land trusts ; Roads ; Protected areas ; Q24 ; R14
• 刊名：Letters in Spatial and Resource Sciences
• 出版年：2012
• 出版时间：October 2012
• 年：2012
• 卷：5
• 期：3
• 页码：137-150
• 全文大小：
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• 作者单位：Heidi J. Albers (1)
  Amy W. Ando (2)
  Meidan Bu (1)
  Michael G. Wing (3)
  
  1. FES/Applied Economics, Oregon State Univ., Richardson 321, College of Forestry, Corvallis, OR, 97331, USA
  2. Dept. of Agricultural and Consumer Economics, Univ. of Illinois, 326 Mumford Hall, 1301 W. Gregory Dr., Urbana, IL, 61801, USA
  3. Dept. of Forest Engineering, Resources, and Management, Oregon State Univ., 204 Peavy Hall, Corvallis, OR, 97331, USA
  
• 刊物类别：Regional/Spatial Science; Agricultural Economics; Geographical Information Systems/Cartography; Land
• 刊物主题：Regional/Spatial Science; Agricultural Economics; Geographical Information Systems/Cartography; Landscape/Regional and Urban Planning; Environmental Economics; Demography;
• 出版者：Springer Berlin Heidelberg
• ISSN：1864-404X

文摘

This paper develops a new measure of the spatial pattern of roads in an area, named the Road Network Agglomeration Index (RNAI), and explores the impact of this dimension of road networks on spatial patterns of conservation networks. RNAI is more spatially descriptive than road density measures used commonly in analyses of conservation patterns, and easier to calculate than some other metrics of road network characteristics. The paper uses both RNAI and road density in a case study, performing regression analyses to explore the drivers of fragmentation of California鈥檚 network of public and private conservation lands. RNAI emerges as a consistently strong indicator of the degree of fragmentation of the reserve network, complementing road density as a measure of features of road networks that affect the pattern of protected areas in a watershed. We also find that private conservation serves more often to increase rather than decrease agglomeration of the reserve network. Keywords Conservation Fragmentation Agglomeration Land trusts Roads Protected areas