Arctic plant biomass and nitrogen by vegetation functional group, northern Alaska, 2017-2019

Climate change is progressing rapidly in the Arctic, leading to changes in plant phenology and in the seasonal patterns of plant properties such as tissue nitrogen (N) content and aboveground biomass. The purpose of this study was to understand the environmental controls on seasonality in tissue N and biomass of Arctic vegetation across the North Slope of Alaska, and how these seasonal patterns vary among Arctic plant functional groups (i.e. shrubs, graminoids, forbs, dwarf shrubs, lichens, bryophytes). We sampled vegetation from 71 points over three years (2017-2019), visiting each point three times (June, July, Sept) during one year. Vegetation biomass and tissue N concentration was determined by vegetation functional group at each location for each time of year. This dataset contains vegetation biomass and tissue nitrogen concentration by vegetation functional group (shrub, graminoid, dwarf shrub, forb, lichen, bryophyte). These data were collected at ~75 locations in northern Alaska three times per growing season. A new set of ~25 points was sampled for three years (2017-2019).

北极地区气候变化正快速演进，进而引发植物物候改变，以及植物组织氮（N）含量、地上生物量等植物性状季节模式的变化。本研究旨在探究阿拉斯加北坡区域北极植被组织氮与生物量季节动态的环境调控机制，同时明晰这些季节模式在不同北极植物功能群（Plant Functional Groups，即灌木、禾草类、非禾本科草本植物、矮灌木、地衣、苔藓植物）间的差异。本研究于2017-2019年的三年间对71个采样点开展植被采样，在对应采样年份的6月、7月、9月对每个采样点进行三次采样。针对每个采样点的各次采样，本研究均按植物功能群测定了植被生物量与组织氮浓度。本数据集包含按植物功能群分类的植被生物量与组织氮浓度数据，涵盖的功能群包括灌木、禾草类、矮灌木、非禾本科草本植物、地衣与苔藓植物。上述数据采集自阿拉斯加北部约75个采样点，每个生长季开展三次采样。其中约25个新增采样点的采样工作于2017-2019年持续开展三年。