Effects of topographic attributes on landscape pattern metrics based on redundancy ordination gradient analysis

文献类型： 外文期刊

第一作者： Zhang, Zhiming

作者： Zhang, Zhiming;Ou, Xiaokun;Xu, Qian;Yu, Qiaochu;Zinda, John Aloysius;Yang, Zijiang;Yin, Mei

作者机构：

关键词： Planimetric landscape metrics;Surface landscape metrics;Anthropogenic categories;Natural categories;Topographic effects

期刊名称：LANDSCAPE AND ECOLOGICAL ENGINEERING （ 影响因子：1.813； 五年影响因子：1.611 ）

ISSN： 1860-1871

年卷期： 2018 年 14 卷 1 期

页码：

收录情况： SCI

摘要： In mountainous areas, the landscape spatial pattern is affected by topography and human activities. To better understand topographic influences on the vegetation structure in the landscape mosaic and interpret the ecological implications of spatial patterns, the relationships between topographic features and landscape pattern indices (LPIs) should be addressed. The objective of this study is to address the effects of topography on LPIs (both planimetric and surface LPIs) by integrating spatial analysis and gradient analysis. To fulfill these objectives, two different mountain research sites located in the Lancang River watershed were chosen, both planimetric and surface landscape metrics were used to quantify natural category (NC) and anthropogenic category (AC) patterns, and the redundancy ordination gradient method was used to address the relationship between LPIs (planimetric and surface metrics) of NC and AC patterns and topographic attributes. The results suggest that topographic attributes play a prominent role in structuring the landscape mosaic. Elevation is a key factor for NC and AC patch patterns in the study area. The results indicate that the fragmentation and isolation of NC patterns increase as elevation decreases. In contrast, the fragmentation and isolation of AC patterns decrease as elevation decreases.

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