基于土地利用变化的农牧交错带典型流域生态风险评价——以洋河为例
徐兰
1,
2
, 罗维
2,
*
, 周宝同
1
Landscape Ecological Risk Assessment of Farming-Pastoral Ecozone Based on Land Use Change—A Case Study of the Yanghe Watershed, China
XU Lan
1,
2
, LUO Wei
2
, ZHOU Bao-tong
1
1990—2008年生态风险值及其空间分布
Ecological risk value and its spatial distribution from 1990 to 2008