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

This data publication contains chemical measurements 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 has a mean slope of ~18° that 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 consists of aqueous total mercury (THg), anion (chloride and sulfate), dissolved organic carbon, and cation (aluminum, calcium, iron, magnesium, manganese, potassium, silicon, sodium, and strontium) concentrations in subsurface runoff water. Daily solute yields in runoff from each hillslope plot were calculated for each solute.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.These data were published on 02/19/2021. On 03/28/2022 minor metadata updates were made, which included updating the citation for a newly published article.

本数据发布包含了2010-2013年间在丘陵森林采伐研究中的化学测量数据。该研究采用前后对照影响设计，在明尼苏达州美国农业部Marcell实验林S7研究流域的丘陵上，于采伐前两年和采伐后两年进行了测量。S7流域北向丘陵的平均坡度为约18°，坡脚处汇入泥炭地。该丘陵被划分为三个处理区块：1）未采伐的对照区，未进行采伐；2）残留生物质留在地面的生物质保留丘陵区；3）残留生物质被采伐的生物质移除丘陵区。在采伐前，森林覆盖层为混合的北方硬木，主要包含糖槭（Acer saccharum）、颤杨（Populus tremuloides）和白桦（Populus balsamifera）。在2011年（采伐前）和2012年（采伐后），在轻春雨事件期间应用了富集的稳定汞同位素作为示踪剂，以评估由于林业实践导致的近期沉积汞迁移性变化。数据包括地下径流水中水合总汞（THg）、阴离子（氯化物和硫酸盐）、溶解有机碳和阳离子（铝、钙、铁、镁、锰、钾、硅、钠和锶）的浓度。每个丘陵地块的径流中每种溶质的日溶质产量都被计算出来。这些数据是作为一项丘陵尺度林业实验的一部分收集的，旨在确定残留生物质移除对丘陵水文和汞迁移的影响。这些数据于2021年2月19日发布。2022年3月28日，对元数据进行了轻微更新，包括更新了一篇新发表文章的引用。