Alaskan Peatland Experiment: Community structure and productivity data for 2007-2010 IX - Stem Density

This dataset contains stem density counts for each species within sub-collar plots (5 per collar) with the gas flux collars at each plot and site of the Alaskan Peatland Experiment. Stem counts were started at the fen in 2008, while counts started at the bog in 2009. 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.本数据集涵盖阿拉斯加泥炭地试验（Alaskan Peatland Experiment）各站点与样地内搭载气体通量环（gas flux collars）的子环样地（sub-collar plots，每个环对应5个子环样地）中各物种的茎秆密度计数数据。茎秆密度计数工作于2008年在低位泥炭沼泽（fen）启动，2009年在高位泥炭沼泽（bog）启动。低位泥炭沼泽站点自2005年起持续开展水位调控实验，设置对照、降水位与升水位三类处理样地。高位泥炭沼泽的样品采集自三处样地：一处位于低地黑云杉永久冻土高原（permafrost），另外两处为嵌入该高原的塌陷坑（collapse scars）。根据BCEF LTER提供的航空影像资料，两处塌陷坑分别形成于约45年前（旧塌陷坑）与约25年前。本数据集提供的数据可按站点与样地进行排序。