湖南山丘区景观生态系统退化特征初探

湖南山地丘陵面积约占全省土地总面积的２／３，是省域最重要的景观生态系统类型。自然状态下，湖南山丘区景观生态系统中景观组分性质优良，景观要素组合协调，景观生态过程稳定，景观功能较强。然而，在长期的人类活动影响之下，湖南山丘区景观生态系统显现出明显的退化特征，具有表现为景观要素组合关系改变、景观组分性质劣化、景观生态过程逆转、景观生态系统抗性降低。

Study on Degradation Characteristics of Landscape Ecosystem in Mountainous and Hilly Area in Hunan Province

The vast mountainous and hilly area, which covers two thirds of total area, is the most important landscape ecosystem type in Hunan province. On natural condition, landscape components keep the fine quality, landscape element combination keeps harmony, ecological processes of landscape are stable, and landscape functions are strong, in landscape ecosystem in mountainous and hilly area in Hunan province. Hower, under the influence of human activities in the long period, landscape ecosystem produces significant degradation characteristics in mountainous and hilly area, which include the alteration of landscape element combination relation, the degradation of landscape component quality, the reversion of the ecological processes of landscape, and the reduction of resistance in landscape ecosystem.