江苏盐城市海滨土地利用对景观生态风险的影响

江苏盐城市海滨土地利用对景观生态风险的影响
孙贤斌;刘红玉
【期刊名称】《国土资源遥感》
【年(卷),期】2011(000)003
【摘要】With the geo - statistical theoretical model and GIS technology, three periods of landscape data from 1987 to 2007 in Yancheng coastal area were assessed for ecological risk and analyzed for spatial variability. Some conclusions have been reached: ① With the growing intensity of human activities in coastal wetlands, the size of natural wetlands gradually decreased, and the disturbance gradually increased in coastal area. ② The ecological environment of this area was subjected to increased interference of human activity and landscape fragmentation from 1987. The change of landscape structure led to significant differences in risk indexes of landscape ecology in time and space. The landscape ecological risk of Yancheng coastal area tended to expand. ③ The degree of spatial variability increased in these 20 years. In 1997, spatial heterogeneity of random party was the largest, and the space - related degree was the largest in landscape ecological risk. ④ From 1987 to 2007, the scale and direction of spatial heterogeneity ( autocorrelation) of landscape ecological risk in Yancheng coastal area also changed significantly. ⑤ In each period, the variation in EW direction was larger than that in NS direction. In EW direction, the intensity of landscape ecological risk
changed from low to high and then to low again.%为了给江苏盐城海滨区域的生态环境管理提供理论和技术支持,利用地统计学理论模型和GIS技术,对江苏盐城海滨区域3个时期的土地利用和景观数据进行了生态风险评价和空间变异分析.研究结果显示:1987 ～ 2007年,盐城海滨区域和自然保护区内的土地利用结构均发生了显著变化,耕地逐渐增加,自然湿地迅速减少、人工湿地逐渐增加,人类对湿地景观的干扰程度逐渐加剧.自1987年以来,盐城市海滨区域的生态环境受人类活动的干扰增强,景观破碎化程度加剧,景观结构的变化已导致景观生态风险指数发生了显著的时空差异,景观生态风险呈增大的趋势.20a间,盐城市景观生态风险的空间变异程度逐渐增大.1997年随机地域的空间异质性最大,景观生态风险的空间相关程度最大.盐城市海滨区域的景观生态风险的空间异质性(自相关)尺度和方向性也发生显著变化.各时段该区域东西方向上的变异大于南北方向上的变异;在东西方向上,景观生态风险强度呈现由低变高,而后又降低的特点,最高风险强度带位于西部农田与东部光滩沼泽交界的过渡地带.
【总页数】6页(P140-145)
【作者】孙贤斌;刘红玉
【作者单位】皖西学院资源环境与旅游管理系,六安237012;南京师范大学地理科学学院,南京210046;南京师范大学地理科学学院,南京210046
【正文语种】中文
【中图分类】TP79;X826
【相关文献】
1.基于土地利用变化的
三江平原景观生态风险研究 [J], 张彪;刘万波;张俊华
2.海口市海岸带近30年土地利用变化的景观生态风险评价 [J], 陈心怡;谢跟踪;张金萍
3.基于土地利用变化的黄河流域景观格局及生态风险评估 [J], 刘希朝;李效顺;蒋冬梅
4.基于土地利用/覆被变化的景观生态风险演化分析 [J], 张应裕;吕凤涛;麦建开;王园园;王彬
5.云南澜沧江流域土地利用及其变化对景观生态风险的影响 [J], 王娟;崔保山;刘杰;姚华荣;翟红娟
因版权原因，仅展示原文概要，查看原文内容请购买。