Alaskan Peatland Experiment: Community structure and productivity data for 2007-2010 VIII - VGA

This dataset contains calculated vascular green area (VGA) by species within each gas flux collar in each plot at both the bog and fen sites of the Alaskan Peatland Experiment. VGA calculations are present at the fen site from 2008-2010, while calculations at the bog include 2009-2010. Within the fen site a water table manipulation has been ongiong since 2005, with control, lowered and raised water table treatment plots. Samples at the bog were collected in a plot established within the lowland black spruce permafrost plateau (permafrost), and two plots established within collapse scars embedded within the plateau. One collapse scar formed ~ 45 years ago (old collapse) and the other formed ~ 25 years ago based upon aerial photography provided by the BCEF LTER. The data provided in this data set can be sorted by site and plot.

本数据集包含阿拉斯加泥炭地实验（Alaskan Peatland Experiment）的高位泥炭沼泽（bog）与低位泥炭沼泽（fen）两类样地中，各试验样方内每个气体通量环（gas flux collar）按物种统计的维管植物绿色面积（vascular green area, VGA）计算值。其中低位泥炭沼泽样地的VGA计算数据覆盖2008至2010年，高位泥炭沼泽样地的计算数据仅包含2009至2010年。低位泥炭沼泽样地自2005年起便持续开展地下水位调控实验，设置了对照、地下水位降低与地下水位升高三种处理样方。高位泥炭沼泽样地的采样设置于三处样方：一处位于低地黑云杉永久冻土高原（永久冻土），另外两处位于该高原内嵌的热融塌陷坑中。根据BCEF长期生态研究网络（BCEF LTER）提供的航空影像，其中一处塌陷坑形成于约45年前（老塌陷坑），另一处形成于约25年前。本数据集提供的数据可按样地与样方进行分类筛选。