2000-2010年中国三北地区生态系统时空变化特征
作者:
作者单位:

中国科学院地理科学与资源研究所,中国科学院地理科学与资源研究所,中国科学院地理科学与资源研究所,中国科学院地理科学与资源研究所

作者简介:

通讯作者:

中图分类号:

基金项目:

国家"十二五"科技支撑计划课题(2013BAC03B04);全国生态环境十年(2000-2010年)变化遥感调查与评估项目专题(STSN-14-00)


Spatial and temporal variations in ecosystems in the three northern regions of China, 2000-2010
Author:
Affiliation:

The Institute of Geographic Science and Natural Resources Research,The Institute of Geographic Science and Natural Resources Research,The Institute of Geographic Science and Natural Resources Research,The Institute of Geographic Science and Natural Resources Research

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 文章评论
    摘要:

    基于遥感解译反演、模型模拟估算等方法,以地面调查作为主要验证手段,分析了21世纪前10年我国三北地区生态系统宏观结构、质量及关键服务变化状况及其驱动因素。结果表明:(1)2000-2010年,三北地区林地面积净增加了0.69万km2,草地面积减少了0.13万km2,湿地面积净减少0.21万km2,耕地面积减少了0.87万km2,人工表面增加了0.57万km2,其它类型面积持续减少了496.5km2。(2)近10年,三北地区归一化植被指数(NDVI)、叶面积指数(LAI)、地上植被生产力总体呈现轻微增加趋势,特别是黄土高原丘陵沟壑区,然而植被覆盖度总体呈现微弱减少趋势。(3)近10年,三北地区单位面积土壤风蚀模数下降了27.25%,减少速率为每年1.13t/hm2,由于风蚀力逐年减弱导致防风固沙服务量呈现减弱趋势。三北地区水蚀区近10年土壤水蚀模数总体呈现微弱增加趋势,而黄土高原区和风沙区则呈现降低趋势,生态系统单位面积土壤保持服务量呈现增加趋势,年增速0.28t/hm2,说明土壤保持能力有所提高。(4)三北地区近10年气温变化斜率为0.02℃/a,适度增温、降水量增加有利于植被恢复;东北华北平原农区和黄土高原丘陵沟壑区人类负向扰动指数呈现减少趋势,说明人类活动对这两个区域自然生态系统的扰动有所遏制。

    Abstract:

    This study analyzed the ecosystem macrostructure, quality, and key services and their driving forces in the three northern regions (northeastern, northwestern, and northern) of China, in the first 10 years of the 21st Century. The results showed that (1) during 2000-2010, forestland area increased by 10,300 km2; grassland decreased by 900 km2; wetland area decreased by 33.9 km2; farmland increased by 1900 km2; artificial coverage increased by 12400 km2; and other ecosystems decreased by 23700 km2 in the three northern regions. (2) The normalized difference vegetation index (NDVI), leaf area index (LAI), and aboveground vegetation productivity in these regions increased slightly over the past 10 years, especially in the Loess Hilly Region. However, the vegetation coverage decreased slightly. (3) The soil erosion modulus per unit area decreased by 27.25% in the three northern regions, with an annual reducing rate of 1.13 t/hm2. The amount of sand-fixing services was low because the force of wind erosion decreased annually, suggesting that a reduced force in wind erosion decreases the amount of soil erosion. In soil water erosion zones of the three northern regions, the soil water erosion modulus showed a slight increasing trend in the past 10 years, whereas the modulus in the Loess Plateau and sand areas showed decreasing trends. The amount of ecosystem soil conservation service per unit area showed an increasing trend, with an annual increasing rate of 0.28 t/hm2, indicating improved soil conservation capacity. (4) The temperature increased by 0.02℃/a, and precipitation increased by 3.00 mm/a in the past 10 years in the three northern regions, and the moderate warming and increased precipitation were useful for vegetation recovery. The human disturbance index showed decreasing trends in Loess Plateau and in the agricultural areas of Northeast and North Plain, indicating that the effect of human disturbances on natural ecosystems has been suppressed in these two regions.

    参考文献
    相似文献
    引证文献
引用本文

黄麟,曹巍,巩国丽,赵国松.2000-2010年中国三北地区生态系统时空变化特征.生态学报,2016,36(1):107~117

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数: