【摘要】 栖息地作为河流水生态系统的重要组成部分,可为生物组分提供生存及繁衍所需的物理、化学及生物条件。良好的栖息地组成及结构是构成河流水生态系统生态完整性和生态健康的必要条件,栖息地质量综合评估可识别河流外部胁迫因子、河流生态完整性水平及健康状况,为河流生态恢复提供科学依据。文章以海河流域典型水系——大清河水系、天津水系和滦河水系为例,对流域尺度下河流栖息地质量进行了评价。结果表明,大清河水系、天津水系和滦河水系河流栖息地质量指数优化值分别为4.934、2.648、7.591,大清河水系河流栖息地质量一般、天津水系河流栖息地质量较差,滦河水系河流栖息地质量较好。更多还原

【Abstract】 As an important component of river ecosystem,river physical habitat provides required physical,chemical and biological conditions to aquatic organisms for survival and reproduction. At the same time,well river physical habitat composition and structure are the necessary conditions constituting the well ecological integrity level as well as ecological health condition of the river ecosystem. Basic information can be acquired by comprehensive river physical habitat quality assessment for river ecosystem restoration,and it can provide a scientific basis to determine the ecological integrity level,degradation extent and identify the external stress of the river ecosystem. The river habitat quality of three typical river systems namely Daqing River system,Tianjin river system and Luan River system were selected as a case study for habitat assessment,and results indicated that the regressive value of river habitat quality index of Daqing River system,Tianjin river system and Luan River system are 4.934,2.648 and 7.591 respectively. Therefore,the corresponding river habitat quality of the three river system are poor and good respectively.更多还原