Different response of vegetation to permafrost change in semi-arid and semi-humid regions in Qinghai–Tibetan Plateau
Different response of vegetation to permafrost change in semi-arid and semi-humid regions in Qinghai–Tibetan Plateau
复制标题
DOI：
10.1007/s12665-011-1405-1
复制
发表时间：
2012-06
影响因子：
2.8
通讯作者：
Wang Zengru;Yang Guojing;Y. Shuhua;Wu Zhen;Guan Jianyue;Heng Xiaobo;Ye Baisheng
中科院分区：
文献类型：
--
作者：
Wang Zengru;Yang Guojing;Y. Shuhua;Wu Zhen;Guan Jianyue;Heng Xiaobo;Ye Baisheng
研究了青藏高原半干旱半湿润地区多年冻土活动层深度对地上植被的影响。测量了活动多年冻土的深度，记录了地上植被。分析了半干旱半湿润地区多年冻土深度与地上植被对应关系的差异。在半干旱和半湿润地区，植被覆盖和生物量与多年冻土深度都有很好的相关性，但半干旱地区的相关系数大于半湿润地区。随着冻土深度的增加，两个地区的植被覆盖度和生物量都有所下降。在半干旱地区，物种丰富度和多样性随着冻土深度的增加而降低。在半湿润地区，随着冻土深度的增加，它们先增加后减少。由于气候变暖，多年冻土深度增加，青藏高原上的植被可能会不同程度地退化。这一影响在半干旱地区尤为显著。
The effects of the depth of the active layer of permafrost on aboveground vegetation in semi-arid and semi-humid regions of the Qinghai–Tibetan Plateau were studied. The depth of active permafrost was measured and aboveground vegetation recorded. Differences in correspondence between permafrost depth and aboveground vegetation in semi-arid and semi-humid regions were analyzed. Vegetation cover and biomass were well correlated with permafrost depth in both semi-arid and semi-humid regions, but the correlation coefficient in the semi-arid region was larger than in the semi-humid region. With the increase in permafrost depth, vegetation cover and biomass decreased in both regions. Species richness and diversity decreased with increasing depth of permafrost in the semi-arid region. In the semi-humid region, these at first increased and then decreased as permafrost depth increased. It seems likely that vegetation on the Qinghai–Tibetan Plateau will degenerate to different degrees due to permafrost depth increasing as a result of climatic warming. The influence would be especially remarkable in the semi-arid region.