Development of a New Index for Integrating Landscape Patterns with Ecological Processes at Watershed Scale

查看全文 作　　者：CHEN [1]Liding;TIAN [1,2]Huiying;FU [1]Bojie;ZHAO [1,2]Xinfeng

机构地区：[1]State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;[2]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Geographical Science》索引2009年第19卷第1期,共9页

基　　金：Under the auspices of Chinese Academy of Sciences (No. KZCX2-YW-421);National Natural Science Foundation of China (No. 40621061, 30570319) 摘　　要：Understanding the relationship between landscape patterns and ecological processes has been a central yet challenging research theme in landscape ecology. Over the past decades,many landscape metrics have been proposed but few directly incorporated ecological processes. In this paper,we developed a landscape index,namely,location-weighted landscape index(LWLI) to highlight the role of landscape type in ecological processes,such as nutrient losses and soil erosion. Within the framework of the Lorenz curve theory,we develop this index by integrating landscape pattern and point-based measurements at a watershed scale. The index can be used to characterize the contribution of landscape pattern to ecological processes(e.g. nutrient losses) with respect to a specific monitoring point in a watershed. Through a case study on nutrient losses in an agricultural area in northeastern China,we found that nutrient losses tended to be higher for a watershed with a higher LWLI value,and vice versa. It implied that LWLI can be used to evaluate the potential risk of nutrient losses or soil erosion by comparing their values across watersheds. In addition,this index can be extended to characterize ecological processes,such as the effect of landscape pattern on wildlife inhabitation and urban heat island effect. Finally,we discuss several problems that should be paid attention to when applying this index to a heterogeneous landscape site. 关键词：景观模式生态学洛伦茨曲线理论养分流失表面水质量

相关文献

参考文献（34）
引证文献（42）
耦合文献（375）

参考文献(34)

引证文献(42)

耦合文献(375)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Development of a New Index for Integrating Landscape Patterns with Ecological Processes at Watershed Scale

参考文献(34)

引证文献(42)

耦合文献(375)

用户提示