摘要
以三江平原的同江市作为研究区域 ,从数量和景观结构两个方面研究典型湿地保护区的耕地时空变化 ,并对其驱动力进行了分析 ,提出了相应的耕地优化调控策略。结果表明 ,从 195 4~ 2 0 0 0年研究区耕地面积增加了 2 92 2 5 8hm2 ,总面积由原来的 1. 37%增加到 4 9 .5 8% ,景观多样性指数由0 . 4 72 3增加到 0 . 74 36。耕地已经成为该区域的主要土地利用方式 ,湿地面积萎缩导致耕地生态功能下降和生态环境质量下降已成为制约该区粮食安全的最重要因素 ,因此必须保护耕地并对其进行优化调控。
Taking Tongjiang City of Sanjiang Plain as an example,spatial and temporal changes of cultivated land in typical wetland natural reserves were studied quantitatively,with driving forces analyzed and optimal regulation measures were put forward.The results indicated that the area of cultivated land has increased by 299,2258 hm2 from 1954 to 2000,and the proportion increased from 1.37% to 49.58%.Landscape diversity increased from 0.4723 to 0.7436.Cultivated land has become the main land use type in this region.The decrease of wetland area led to the declination of ecological function,which has become the most important factor threatening the grain safety.Cultivated lands should be protected and optimally regulated.
出处
《生态学杂志》
CAS
CSCD
北大核心
2005年第3期291-295,共5页
Chinese Journal of Ecology
基金
中国科学院知识创新工程重要方向资助项目 (KZCX2 SW 3 2 0 1)
关键词
耕地
优化调控
湿地
景观格局
cultivated land,optimal regulation,wetland,landscape pattern