摘要
生境适宜性是区域生态环境状态的重要判据之一,开展生境适宜性评价可有效揭示区域生境质量,可为山区气候变化研究和聚落可持续发展规划提供基础数据支撑。借助ArcGIS软件平台,基于ASTERGDEM数据,已有研究成果和实地勘察数据,研发岷江上游流域生境要素数据集。数据结果表明:①岷江上游流域整体生境适宜性较低,适宜、次适宜生境面积分别为4,431.80 km^2、6,171.12 km^2,仅研究区总面积的47.35%。②岷江上游生境适宜性的空间分异特征显著:适宜及次适宜性生境主要分布于干旱河谷谷肩上部,植被类型以常绿落叶阔叶混交林、针阔叶混交林为主,生态修复将比较容易取得良好效果;生境适宜性较低的地区主要分布于高海拔区,植被类型多为低矮的高山灌丛和草甸;在干旱谷地,生境等级以较不适宜、不适宜为主,植被类型多为干旱河谷小叶灌丛,生态修复难度大。该数据集存储为.tif格式,压缩后数据量为4.57 MB。
Habitat suitability is one of the most important criteria for assessing the status of regional eco-environments.The assessment of the suitability of plant habitats can reveal the quality of regional habitats,and provide basic data to support climate change research and sustainable development plans for settlement in mountainous areas.Using the Arc GIS software and based on ASTER GDEM data,and in situ field survey data,the Habitat Assessment Dataset cover the Upper Reaches of Min River of China was developed.The data products indicate:(1)Suitable and sub-suitable habitats habitat area covers 4,431.80 km^2 and 6,171.12 km^2,respectively,accounting for 47.35%of the whole area.The results indicated that the plant habitat in the Upper Reaches of the Min River was poor and that ecological restoration was both urgent and difficult.(2)Significant spatial differentiation characteristics of habitat suitability were discovered in URMR.Suitable and sub-suitable habitats were mainly distributed in the upper parts of the V-shaped valley in the arid valley,where the vegetation types were mainly evergreen trees,deciduous broad-leaved mixed forests and coniferous broad-leaved mixed forests.In these areas,habitat restoration would be easier and would have better results.Unsuitable habitat was mainly distributed in high altitude areas,where the vegetation types were mostly alpine shrubs and meadows.In the bottom of the arid valley,the levels of habitat suitability were assessed as being unsuitable and most unsuitable;here,the vegetation types were mainly arid shrubs and ecological restoration was difficult.The dataset is archived in.tif data format with a data size of 4.57 MB.
作者
郭亚琳
王青
闫卫坡
周琴
石敏球
Guo,Y.L.;Wang,Q.;Yan,W.P.;Zhou,Q.;Shi,M.Q.(School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《全球变化数据学报（中英文）》
2017年第4期431-436,431-436,共12页
Journal of Global Change Data & Discovery
基金
国家自然科学基金(41071115)
中华人民共和国科学技术部(2011BAK12B04-02)
关键词
生境
适宜性
空间格局
岷江上游
habitat
suitability
spatial pattern
the Upper Reaches of the Min River
