Latitudinal Trends in Vegetation Productivity of Permafrost Wetlands in Great Hing’an Mountain Valleys and Its Response to Global Change

摘要：

The permafrost wetlands in the Great Hing’an Mountain valleys are degenerating in response to climatic warming and retreat of permafrost. Changes in vegetation productivity are an important aspect in the studies on permafrost wetlands in response to global change. We investigated the vegetation productivity aboveground in the 12 permafrost wetlands in the Great Hing’an Mountain valleys along a latitudinal gradient. The results indicated a significant latitudinal gradient in herbage productivity, which was determined primarily by temperature. Linear regression demonstrated an 80 g· m.2 increase in herbage productivity with an increase of annual temperature by 1oC. If temperatures increased 24 oC over the next century, herbage productivity would increase 24 times in predominantly continuous permafrost, and 57114％ in island permafrost. Shrub productivity and community productivity had no significant relationships with latitude, but they tended to increase first, and then decrease with the increase of mean precipitation in July.

关键词： productivity climate temperature warming permafrost wetlands

作者: SUN Ju LI Xiuzhen WANG Xianwei Lv Jiujun LI Zongmei

作者单位: Institute of Applied Ecology, Chinese Academy ofSciences, Shenyang 110016, ChinaGraduate University Institute of Applied Ecology, Chinese Academy ofSciences, Shenyang 110016, China Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Graduate Universit

会议类型: 国际会议

会议名称: 2010 2nd IEEE International Conference on Information Management and Engineering(2010年IEEE第二届信息管理与工程国际会议 IEEE ICIME 2010)

会议地点: 成都

会议语种:英文

页码: 1-5

在线出版日期: 2010-04-16（万方平台首次上网日期，不代表论文的发表时间）