Soil and invertebrate chemistry data for a forest clearcutting and residual biomass removal study at the Marcell Experimental Forest

This data publication contains soil and invertebrate chemistry data from a hillslope forest harvesting study that occurred between 2010-2013. The study follows a before-after-control-impact design, with measurements collected two years pre-harvest and two years post-harvest on a hillslope in the S7 research watershed at the USDA Marcell Experimental Forest, Minnesota, USA. The north-facing hillslope in the S7 watershed drains into a peatland at the toe of the slope. The hillslope was divided into three treatment blocks: 1) an Unharvested Control that was not harvested, 2) a Biomass Left hillslope where residual biomass remained on the ground, and 3) a Biomass Removed hillslope where residual biomass was harvested. Prior to harvesting the forest cover was mixed northern hardwoods, predominately comprised of sugar maple (Acer saccharum), quaking aspen (Populus tremuloides) and balsam poplar (Populus balsamifera). During 2011 (pre-harvest) and 2012 (post-harvest) enriched stable mercury isotopes were applied during light spring rain fall events to add a tracer for the assessment of changes in recently deposited mercury mobility due to forestry practices. The data consist of peat total mercury (THg) and methylmercury (MeHg) in organic soils, mercury methylation rate constants, and MeHg in macroinvertebrates of the downgradient peatland collected from 2010 to 2012.These data were collected as part of a hillslope-scale forestry experiment to determine the effects of residual biomass removal on hillslope hydrology and mercury mobilization.

本数据出版物收录了2010至2013年间在坡面森林采伐研究中采集的土壤及无脊椎动物化学数据。该研究遵循“前-后-对照-影响”的设计原则，在明尼苏达州美国农业部马塞实验林S7研究流域的坡面上，于采伐前两年和采伐后两年进行了测量。S7流域北向坡面汇入坡脚处的泥炭地。该坡面被划分为三个处理区块：1）未经采伐的对照区块，2）残留生物质区块，其中地面保留了残余生物质，以及3）生物质去除区块，其中残余生物质被采伐。在采伐前，森林覆盖层由混合的北部硬木组成，主要包含糖槭（Acer saccharum）、颤杨（Populus tremuloides）和树脂杨（Populus balsamifera）。在2011年（采伐前）和2012年（采伐后），在春雨季节，应用了富集稳定汞同位素作为示踪剂，以评估林业实践对近期沉积汞迁移性变化的影响。数据包括泥炭中总汞（THg）和甲基汞（MeHg）在有机土壤中的含量、汞甲基化速率常数，以及从2010年至2012年收集的下游泥炭地大型无脊椎动物中的MeHg。这些数据作为坡面尺度林业实验的一部分进行收集，旨在确定残余生物质去除对坡面水文和汞迁移的影响。