摘要
建立基于自然-经济-社会子系统的县域土地生态安全综合评价体系,评价2001—2010年四川省丹棱县的土地生态安全状况,并分析土地生态系统协调度的动态变化,探讨丹棱县在眉山市所处的土地生态安全水平。结果表明,2001—2010年丹棱县土地生态安全状况总体呈好转趋势,但至2010年仍处于敏感级和预警状态,综合生态安全值由0.630 6增长至0.697 2,其中土地经济生态安全值由0.236 6增加至0.327 9,但自然和社会生态安全值分别由0.262 3和0.131 7下降至0.253 9和0.115 3。2001—2010年土地生态系统协调度由0.670 9下降至0.535 6,从2007年起系统处于不协调状态。从2008年起丹棱县土地生态安全水平高于眉山市平均水平。
Using the county-level comprehensive land ecological security assessment system, consisting of three sub-sys- tems, i.e. nature, economy and society, land ecological security of Danling County, Sichuan Province, in 2001 -2010 was evaluated, dynamic changes in coordination degree of the system analyzed, and Danling County compared with all the other counties in Meishan City in land ecological security. Results show that on the whole the land ecological security of Danling was on the way turning better during 2001 -2010, however, in 2010, it was still at a sensitive and alert stage. The comprehensive ecological security value increased from 0. 630 6 to 0. 697 2, and the land economic ecological security value increased from 0. 236 6 to 0. 327 9, while the natural and societal ecological security value dropped from 0. 262 3 and 0. 131 7 to 0. 253 9 and 0. 115 3, respectively, and the coordination degree of the land ecosystem dropped from 0. 670 9 to 0. 535 6 from 2001 to 2010. Beginning from 2007, the land ecosystem of the county fell into the status of in- harmony. And since 2008, Danling has been lingering above the average of Meishan City in land ecological security.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2013年第3期295-300,共6页
Journal of Ecology and Rural Environment
基金
国家自然科学基金(40671117
40771117)
关键词
生态安全
土地生态安全评价
县域
协调度
丹棱县
ecological security
land ecological security assessment
county level
coordination degree
Danling County
