IMHE OpenIR  > 数字山地与遥感应用中心
区域生态系统多样性遥感监测与评估—以重庆市为例
Alternative TitleRemote sensing monitoring and evaluation of regional ecosystem diversity: a case study of Chongqing City
Language中文
刘倩楠
Thesis Advisor李爱农
2016
Degree Grantor中国科学院大学
Place of Conferral北京
Degree Name博士
Degree Discipline自然地理学
Keyword区域生态系统多样性 重庆 遥感 Bp神经网络
Other Abstract

生态系统多样性保护问题受到到国际社会广泛的关注。重庆市地形复杂、气候多样且地质特殊,是我国景观类型丰富,生物多样性和生态系统丰富的地区之一,已成为众多学者关注的区域。基于此,本文基于RS和GIS技术、景观生态学和生物多样性的理论和方法,以重庆市2000、2005和2010年3期Landsat TM影像为主要数据,并辅DEM和野外调查等非遥感信息,基于多步骤分类方法完成LUCC定量提取,并运用土地利用时空演变模型定量分析LUCC数量和质量及其变化,从时空角度揭示本区域10年来LUCC内空间内涵、生态过程和驱动机制。在此基础上,基于“压力-状态-响应”模型,从生态系统多样性的现状、威胁和响应出发,从大尺度构建生态系统多样性评估指标体系,基于多步骤分类方法完成生态系统多样性的综合评价。研究结果表明:1、收集研究区域遥感图像(Landsat TM)、植被指数(NDVI)、地形和地质地貌数据等相关信息,根据研究区域特点构建土地分类系统,基于多源空间数据库建立研究区域地物类型解译标志,结合野外实地考察数据采用基于多步骤分类方法对2000年、2005年和2010年三期数据进行分类,2000年、2005年和2010年分类精度达到88.33%、86.35%、88.58%,kappa系数分别为0.8565、0.8374、0.8517。2、2000-2010年间,生态系统类型面积减少为耕地生态系统、草地生态系统和未利用地;面积增加的生态系统为森林生态系统、水域生态系统和人工表面。其中耕地生态系统的变化最大,未利用地生态系统的变化最小,10年内减少的面积分别为754.7km2和2.64km2,水域生态系统的面积增加的最大,为1005.42km2,主要源于三峡大坝工程的修建。3、基于地形梯度的土地利用研究表明:林地和草地分布趋势相似,高程400m~800m区域是其优势分布区,之后分布面积随着海拔升高而减少,未利用地和人工表面的分布趋势相似,主要集中分布于海拔小于400m区域,耕地集中分布于高程小于800m区域。森林和草地生态系统的坡度梯度分布趋势相似,都在于陡坡区域的分布面积最大;人工表面生态系统在缓坡上的分布面积最大;人工表面和未利用地生态系统在半阴坡区域分布最为广泛,耕地和林地生态系统的分布趋势相同,都集中分布于半阳坡和半阴坡。4、2000-2010年期间重庆市整体生态多样性格局变化较小,各等级生态多样性区域相对位置变化不大。基本呈现为:东北部及中部的东北-西南走向的狭长地带生态系统多样性极为丰富,西北部和北方部分区域生态多样性单一。到2010年,生态多样性单一化得到控制,趋势有所逆转。从2000年至2005年再到2010年研究区域生态多样性优越程度呈先减后增趋势发展。5、10年间,生态多样性极为丰富的区域主要分布在城口县、巫溪县、巫山县、奉节县以、石柱土家族自治县、武隆县和南川区等地域境,且面积递增;生态多样性简单和一般的区域面积呈现递减趋势,分别发生于合川县以及垫江县境内和酉阳土家族苗族自治县境内。旨在促进区域生态系统多样性的保护和监测提供技术支持,防止区域土地利用时空演变而导致物种生境恶化、生物多样性损失和生态系统多样性的损坏,以期为该区域的生态环境规划和可持续发展提供基础数据和理论依据。

;

The international community is concerned with the protection of diverse ecosystems. Chongqing possesses a complicated terrain, varied climate, and unique geology. It is one of the regions in China with rich landscape types, biodiversity, and various ecosystems, which attracted the attention of numerous researchers. Based on RS and GIS technologies’ theory and method on landscape ecology and biodiversity, this paper accomplished quantitative extracts of LUCC through multi-steps classification method using Landsat TM images (main data) and non-remote auxiliary sensing information (e.g., DEM and field survey data) of Chongqing in 2000, 2005, and 2010. Based on how lands are used over time, changes in quantity and quality of LUCC were analyzed, disclosing internal space meaning, ecological process, and driving mechanism of local LUCC in the past 10 years. A detailed catalogue of ecosystem diversity was established based on the pressure-state-response model, with details on status, threats, and response. Ecosystem diversity was evaluated comprehensively through the multi-steps classification method to provide technical support for protection and monitoring of regional ecosystem diversity and for prevention of species habitat worsening, biodiversity loss, and ecosystem diversity damages caused by changes in land usage. Research results are as follows:1. Remote sensing images (Landsat TM), vegetation index (NDI), and terrain and geological data of the study area were collected to establish a land classification system according to local characteristics. Interpretation signs were made in the study area with feature types based on multisource spatial database. Data in 2000, 2005, and 2010 were classified through the multi-steps classification method by combining field survey data. The data classification accuracies for 2000, 2005, and 2010 reached 88.33%, 86.35%, and 88.58%, in that order, and the kappa coefficients were 0.8565, 0.8374, and 0.8517, respectively. 2. From 2000 to 2010, areas of cultivated land, grassland, and unused land ecosystems decreased, whereas areas of forest, aquatic, and artificial surface ecosystems increased. Areas of cultivated land ecosystem have changed the most, decreasing by 754.7 km2 in the past 10 years. The unused land ecosystem has changed the least, decreasing by only 2.64 km2. Areas of the aquatic ecosystem have increased the most, reaching 1005.42 km2. These changes are caused by the Three Gorges Dam construction.3. According to research on land utilization based on terrain gradient, forest land and grassland have similar distribution pattern, mainly in regions from 400 m to 800 m altitude. Their distribution areas decrease in a higher altitude. Unused and artificial lands distribute similarly, mainly concentrating in regions reaching 400 m altitude. Cultivated lands distribute up to 800 m altitude. Forest and grassland ecosystems present similar distribution trend of a gradient slope and have the largest distribution areas in steep areas. Artificial surface ecosystem has the largest distribution area on gentle slope areas. Artificial surface and unused land ecosystems concentrate in half-shaded slope areas, whereas cultivated land and forest ecosystems concentrate in half-sunny and half-shaded slopes.4. The overall biodiversity pattern in Chongqing changed slightly from 2000 to 2010, as shown by the small changes in relative regional positions of ecological diversities at all levels. Specifically, Northeast and northeastward-southwestward corridors in Central China have rich ecosystem diversities, whereas Northwest and North China have simple ecological diversity. The simplification of ecological diversity was controlled in 2010. Ecological diversity in Chongqing decreased from 2000 to 2005, and then increased from 2005 to 2010.5. From 2000 to 2010, regions with rich biological diversity are mainly the counties of Chengkou, Wuxi, Wushan, Fengjie, Shizhu Tujia Autonomous, Wulong, and Nanchuan. The area of rich biological diversity expanded yearly. Meanwhile, the area of simple ecosystem diversity and ordinary regions decreased, mainly in the counties of Hechuan, Dianjiang, and Yongyang Miao.This paper provided basic and theoretical data for ecological–environmental planning and sustainable development in local areas.

Document Type学位论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18970
Collection数字山地与遥感应用中心
Affiliation中国科学院成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
刘倩楠. 区域生态系统多样性遥感监测与评估—以重庆市为例[D]. 北京. 中国科学院大学,2016.
Files in This Item:
File Name/Size DocType Version Access License
区域生态系统多样性遥感监测与评估—以重庆(8737KB)学位论文 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[刘倩楠]'s Articles
Baidu academic
Similar articles in Baidu academic
[刘倩楠]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[刘倩楠]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 区域生态系统多样性遥感监测与评估—以重庆市为例.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.