SPRUCE Epiphytic Lichen Annual Biomass Growth in Experimental Plots, 2013-2016.

This data set provides annual biomass growth rates of epiphytic lichen transplants in the SPRUCE experimental plots at the S1 Bog of the Marcell Experimental Forest in northern Minnesota, 40 km north of Grand Rapids. Epiphytic lichens (Evernia mesomorpha, a boreal forest indicator species) were collected at S1 Bog outside the experimental enclosures and mounted on Picea mariana branches inside the 10 experimental enclosures and the 2 ambient plots without enclosures using transplant techniques. Lichen transplants were weighed annually, in August of 2013-2016, to measure biomass growth rates as a function of experimental temperature and CO2 treatments.

本数据集提供了明尼苏达州北部大急流城以北40公里处的马塞尔实验林（Marcell Experimental Forest）S1泥炭沼泽SPRUCE实验样地中，附生地衣（epiphytic lichen）移植体的年生物量增长率数据。实验所用附生地衣为寒温带森林指示物种中凹扁枝衣（Evernia mesomorpha），采集自S1泥炭沼泽的实验围控区外；随后通过移植技术将其挂载于10个实验围控样地与2个无围控的环境对照样地内的黑云杉（Picea mariana）枝条上。研究于2013至2016年每年8月对移植地衣进行称重，以测定其生物量增长率，该指标作为实验性温度与二氧化碳处理的响应变量。