基于生态多稳态的山地植被垂直自然带定量识别研究——以新疆博格达山为例  

Quantitative identification of altitudinal natural zones of mountain vegetation based on ecosystem multi-stable states——A case study of Bogda Mountain in Xinjiang

作　　者：万红 郭鹏[3] 骆磊 赵颜创 赵燕 王心源 WAN Hong;GUO Peng;LUO Lei;ZHAO Yanchuang;ZHAO Yan;WANG Xinyuan(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Universityof Chinese Academy of Sciences,Beijing100049,China;Shandong Agricultural University,Tai'an271018,China;International Centre on Space Technologies for Natural and Cultural Heritage under the Auspices of UNESCO,Beijing 100094,China;Henan University of Technology,Zhengzhou450001,China)

机构地区：[1]中国科学院空天信息创新研究院,北京100094 [2]中国科学院大学,北京100049 [3]山东农业大学,泰安271018 [4]UNESCO国际自然与文化遗产空间技术中心,北京100094 [5]河南工业大学,郑州450001

出　　处：《遥感学报》2022年第11期2234-2247,共14页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家重点研发计划(编号:2016YFC0503302)。

摘　　要：山地生态系统的自然特征和服务功能与其自身的垂直自然带分布有着密切的关系,定量识别其分布的海拔范围,能够快速捕捉气候和植被之间的相互作用结果。过渡范围海拔的定量识别往往会受到数据的时空连续性和模型分析能力的限制。本研究将温带荒漠、山地草原、山地针叶林、高山草甸、高山垫状植被作为生态系统稳定状态,利用Landsat-8和SRTM DEM数据,基于稳态转换原理结合势能分析方法,估算垂直自然带相邻两个状态的势能量,识别博格达山北坡垂直自然带的生态过渡区域及分带海拔。研究结果:(1)沿海拔梯度,地表温度LST (Land Surface Temperature)概率密度分布呈现多峰模式,赤池信息准则AIC (Akaike Information Criterion)最小值对应的模式数为2,二者均揭示存在不同的生态系统状态;(2)势能分析识别出沿海拔梯度相邻垂直自然带间的生态过渡区域及分带海拔,温带荒漠带—山地草原带(海拔1062—1093 m,1066 m)、山地草原带—山地针叶林带(海拔1689—1764 m,1707 m)、山地针叶林带—高山草甸带(海拔2690—2744 m,2714 m)、高山草甸带—高山垫状植被带(海拔3251—3263 m,3257 m);(3)通过2018年7月的野外考察数据验证了结果的可靠性,总体RMSE为17.19 m。结果表明基于遥感对地观测数据及生态多稳态原理和势能分析方法为快速准确的提取垂直自然带的生态过渡区域及分带的海拔位置提供了参考依据。The distribution of altitudinal natural zones is closely related to the natural characteristics and service functions of mountain ecosystems.Quantitative identification of its elevation range can efficiently capture the results of the interaction between climate change and vegetation.Digital extraction and extensive analysis in such a critical elevation range is often restricted by the suitability of the experimental model and the spatial-temporal continuity of the data.In this study,temperate deserts,montane steppes,montane coniferous forests,alpine meadows and alpine cushion vegetation were considered as the stable state of the ecosystem.The land surface temperature was derived from the Landsat 8 Thermal Infrared Sensor data using the mono-window algorithm.Latent class analysis was conducted to test whether the remotely sensed indicator exhibited a multi-peak mode and to evaluate the number of states in an actual ecosystem.The potential energy of two adjacent states of the altitudinal natural zone was estimated by the potential energy analysis model,and the ecological transition range and demarcation elevation on the northern slope of Bogda Mountain were identified.The results showed that the frequency distribution of LST was bimodal,indicating the presence of distinct alternative modes.Moreover,the number of system modes changed from 1 to 2,and the AIC rapidly decreased.Both states revealed the existence of different ecosystem states.Second,potential energy analysis was used to identify the ecological transition area and demarcation elevation between adjacent altitudinal natural zones along the elevation gradient,temperate desert-montane steppes(transition range:1062—1093 m,demarcation elevation:1066 m),montane steppes-montane coniferous forests(transition range:1689—1764 m,demarcation elevation:1707 m),montane coniferous forests-alpine meadows(transition range:2690—2744 m,demarcation elevation:2714 m),and alpine meadows-alpine cushion vegetation(transition range:3251—3263 m,demarcation elevation:3257

关 键 词：植被垂直自然带 生态多稳态 关键转变 势能分析 博格达山 

分 类 号：P2[天文地球—测绘科学与技术]