摘要
生境适宜性评价是物种保护和生境管理与规划的基础。近几十年来,云南境内野生亚洲象数量剧增,外扩迁移事件频发,而新迁入区域生境适宜状况因物种出现点数据缺乏而难以评价,掣肘迁移亚洲象保护与风险防范应急。以亚洲象新近迁入的元江-李仙江流域为案例区,采用荟萃分析统计亚洲象生境评价因子,结合相关性分析和方差膨胀因子独立性检验,筛选出生境评价因子;基于开源遥感数据产品量化生境因子,综合主成分分析和层次分析计算生境评价因子权重,采用生境适宜性指数(Habitat Suitability Index, HSI)模型评价元江-李仙江流域亚洲象生境适宜性,并分析其景观格局。结果表明:(1)元江-李仙江流域亚洲象生境适宜性空间格局主要表现为由下游至上游呈递减趋势,最适生境主要分布于流域下游段,而流域上游段适宜生境少;(2)元江流域生境适宜性低于李仙江流域,且其生境斑块连接度更低、破碎化更严重;(3)2021年“北移象群”北迁沿程生境适宜性由西南向东北呈下降趋势。基于亚洲象生境适宜性评价结果,科学引导野生亚洲象迁入适宜生境区,以规避人象冲突,保障外迁亚洲象群及其活动区居民生命财产安全,服务于区域生物多样性保护与乡村振兴。
Habitat suitability evaluation is a basis for species conservation, habitat management and planning. Over the past decades, the number of wild Asian elephants in Yunnan Province of China has increased sharply, and elephants′ emigration from their original habitats frequently occurred. However, habitat quality in the newly inhabited areas is often poorly known due to lack of records in presence of Asian elephants, which hinders Asian elephant protection and risk prevention. The rapid development of remote sensing big data mapping technology provides new data sources for habitat suitability evaluation studies, and offers the possibility of identifying suitable habitats for species on a large regional scale more accurately and finely. In this study, a remote sensing big data-driven habitat suitability evaluation system for Asian elephants is constructed. We selected the Yuanjiang-Lixianjiang River Basin newly immigrated by Asian elephants as a case area, used meta-analysis to search for environmental factors related to Asian elephants habitat evaluation, and screened out habitat suitability evaluation factors by combining correlation analysis with variance inflation factor test. Subsequently, all habitat suitability evaluation factors were quantified based on open-source remote sensing data products and their weights were calculated using principal component analysis and analytic hierarchy process. Finally, we used a Habitat Suitability Index(HSI) model to determine the habitat suitability of Asian elephants in the study area and analyzed landscape patterns of habitats of Asian elephants. The results show that(1) the habitat suitability of Asian elephants in the Yuanjiang-Lixian River Basin decreased gradually upstream. The optimal habitat mainly occurred in the downstream basin, with a small distribution in the midstream basin and almost no distribution in the upstream basin.(2) The Yuanjiang River Basin was less suitable for Asian elephants than the Lixian River Basin because it had less connected and more fragm
作者
张鑫
尹文萍
谢菲
樊辉
陈飞
ZHANG Xin;YIN Wenping;XIE Fei;FAN Hui;CHEN Fei(Institute of International Rivers and Eco-Security,Yunnan University,Kunming 650091,China;Yunnan Key Laboratory of International Rivers and Transboundary Eco-security,Yunnan University,Kunming 650091,China;Asian Elephant Research Center of State Forestry and Grassland Administration,Kunming 650216,China;Kunming Institute of Survey and Design State Forestry and Grassland Administration,Kunming 650216,China)
出处
《生态学报》
CAS
CSCD
北大核心
2022年第12期5067-5078,共12页
Acta Ecologica Sinica
基金
第二次青藏高原综合科学考察研究(2019QZKK0402)
国家自然科学基金项目(41971239,41461017)。
关键词
生境适宜性指数
荟萃分析
遥感大数据
亚洲象
元江-李仙江流域
habitat suitability index
meta-analysis
remote sensing big data
Asian elephant
Yuanjiang-Lixianjiang River Basin
