首页关于本刊影响因子及获奖投稿须知订阅及广告专辑与专题学术会议绿色发表通道优秀论文 
卢慧婷,黄琼中,朱捷缘,郑天晨,严岩,吴钢.拉萨河流域生态系统类型和质量变化及其对生态系统服务的影响.生态学报,2018,38(24):8911~8918 本文二维码信息
二维码(扫一下试试看!)
拉萨河流域生态系统类型和质量变化及其对生态系统服务的影响
Ecosystem type and quality changes in Lhasa River Basin and their effects on ecosystem services
投稿时间:2018-06-03  修订日期:2018-09-28
DOI: 10.5846/stxb201806031238
关键词生态系统服务  生态系统质量  InVEST模型  NDVI  青藏高原
Key Wordsecosystem services  ecosystem quality  InVEST model  NDVI  Qinghai-Tibet Plateau
基金项目国家重点研发计划项目(2016YFC0502102);西藏自治区科技计划项目(Z2016C01G01/08)
作者单位E-mail
卢慧婷 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049 
 
黄琼中 西藏自治区环境监测中心站, 拉萨 850000  
朱捷缘 中国科学院大学资源与环境学院, 北京 100049
中国科学院城市环境研究所, 城市环境与健康重点实验室, 厦门 361021 
 
郑天晨 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049 
 
严岩 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085 yyan@rcees.ac.cn 
吴钢 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085  
摘要点击次数 77
全文下载次数 63
摘要:
在气候变化和人类活动干扰驱动下,地表生态系统的类型和质量都在发生复杂的变化,进而对生态系统服务和人类福祉产生深远影响。青藏高原的生态重要性和生态敏感性显著,其生态系统和生态服务的变化对区域和我国的生态安全具有重要的影响和指示意义。为了揭示拉萨河流域近年来的生态系统变化导致的生态系统服务变化,尤其是生态系统质量变化及其对生态系统服务的影响,选择NDVI作为生态系统质量变化的指示因子,通过对InVEST模型中与植被相关的各参数进行计算和修正,结合生态系统类型变化,评估了1990-2015年间拉萨河流域土壤保持、水源涵养和固碳三项生态系统服务的变化,进而分析了生态系统类型和质量变化对其的影响。研究结果表明,1990-2015年拉萨河流域生态系统类型变化整体相对较小,但是人工表面和湿地面积变化速率较快;1990-2000年生态系统质量整体有显著上升,2000年以后略有下降,其中2000-2015年草甸和草原NDVI分别下降了7.48%和5.44%,呈现明显退化趋势;1990-2015年拉萨河流域土壤保持和固碳服务分别增加了3.98%和9.12%,而水源涵养服务降低了23.05%,各项生态系统服务变化主要发生在1990-2000年;总体来看,生态系统类型变化引起的生态系统服务变化相对较小,而生态系统质量变化对流域生态系统服务的影响显著,尤其是1990-2000年间;但2000年以后生态系统类型变化对生态系统服务变化的贡献有所加大。
Abstract:
Due to the impact of climate change and human activities, both the type and quality of ecosystems are changing in complex ways. As a result, ecosystem services and human well-being are profoundly affected. Nevertheless, how the ecosystem quality change affects ecosystem services is often neglected in previous studies. Compared with the dominant and obvious change in ecosystem types (or land cover types), the change of ecosystem quality is more subtle and continuous. However, the ecosystem quality change usually involves a much wider range, and may cause greater influence to the ecosystem resilience, function and services. Since Qinghai-Tibet Plateau is of great ecological importance and one of the most sensitive areas to climate change, it is desired to study the ongoing changes of the ecosystem and its services. Located at the south-east part of the Tibetan Plateau, Lhasa River Basin is the center of Tibet Autonomous Region in terms of economy, agriculture and demography. To reveal the recent ecosystem changes and the consequent service changes of Lhasa River Basin, especially the change in the ecosystem quality and its effects, we selected the growing season (from June to October) NDVI as the indicating factor of ecosystem quality to adjust the parameters of the InVEST model, and then assessed three ecosystem services (soil retention, seasonal water yield and carbon storage) from 1990 to 2015. The effects of the ecosystem type change and ecosystem quality change on ecosystem services, as well as their relative contributions, were then analyzed. The main conclusions are as follows:(1) from 1990 to 2015, the overall ecosystem type change was insignificant, and the change mainly occurred during the last 5 years. However, the area of artificial surfaces and wetland increased sharply by 82.65% and 32.40%, respectively. (2) The growing season NDVI of all vegetation types increased significantly between 1990 and 2000, and then slightly decreased afterwards. The growing season NDVI of meadow and grassland decreased by 7.48% and 5.44% respectively from 2000 to 2015, indicating an obvious degradation trend. (3) Overall, from 1990 to 2015, the ecosystem service changes caused by ecosystem type change were relatively small, while the ecosystem quality change had rather remarkable effects on the ecosystem services. From 1990 to 2000, the soil retention and carbon storage increased by 4.63% and 12.05% respectively, and the baseflow decreased by 22.14%; the contributions of ecosystem quality to these changes were 100.22%, 99.99% and -99.78% respectively. From 2000 to 2015, the soil retention, baseflow and carbon storage decreased by 0.62%, 1.17% and 2.62%, respectively; the contributions of ecosystem quality to these changes were -89.28%, 40.21% and -126.12% respectively; the contributions of land cover change were -10.94%、-140.26% and 27.44% respectively, indicating that the land cover change began to have greater effect on the ecosystem services after 2000.
HTML 查看全文   查看/发表评论  下载PDF阅读器

您是本站第 76628894 位访问者

Copyright © 2005-2019   京ICP备06018880号
地址:北京海淀区双清路18号
  邮编:100085    电话:010-62941099
  E-mail : shengtaixuebao@rcees.ac.cn
本系统由北京勤云科技发展有限公司提供技术支持