Use of a weighing lysimeter system to assess the effects of trampling on evapotranspiration of montane plant communities
Use of a weighing lysimeter system to assess the effects of trampling on evapotranspiration of montane plant communities
复制标题
使用称重蒸渗仪系统评估践踏对山地植物群落蒸散量的影响
作者：
D. Scott;N. Bayfield;A. Cernusca;D. Elston
目的是研究践踏对结构和物种组成不同的植被中水分损失和分配的影响。一种新设计的称量蒸渗仪在温室试验中用于比较完整和被践踏的植被块的蒸散量。蒸渗仪系统仅在几个小时后就能检测到不同处理之间的差异。记录了六个群落的蒸散量，这六个群落代表了苏格兰凯恩戈姆山脉发现的隐花维管植物群落。在48h以上，三种群落(Agrostis/Festuca草地、马蹄莲湿生群落和地衣健康群落)的植被块的累积蒸散量最大，地衣健康最小。践踏逐渐破坏了所有社区的植被结构，增加了街区的失水率。那个G..。
The aim was to investigate the impacts of trampling on water loss and partitioning in vegetation with contrasting structure and species composition. A new design of weighing lysimeter was used in glasshouse experiments to compare evapotranspiration from intact and trampled blocks of vegetation. The lysimeter system was able to detect differences between treatments after only a few hours. Evapotranspiration was recorded for six communities, representative of cryptogam - vascular plant communities found in the Cairngorm Mountains of Scotland. Vegetation blocks of Racomitrium and Vaccinium/Hylocomium heath communities had the greatest cumulative evapotranspiration and lichen heath the least over 48 h. Blocks from three of the communities (Agrostis/Festuca grassland, Calluna wet heath, and lichen heath) were used in a trampling experiment with five levels of damage. Trampling progressively destroyed the structure of the vegetation of all communities and increased the rates of water loss from the blocks. The g...