Plant community composition in the Arctic System Science Program (ARCSS) grid at Utqiaġvik and Atqasuk, Alaska

Arctic ecosystems are changing in response to arctic warming, which is proceeding more than twice as fast as the global average. The International Tundra Experiment (ITEX) was established in the early 1990s to understand the effects of warming and environmental variability on tundra vegetation properties and ecosystem function. The ITEX program has been extremely valuable for detection of changes in tundra plant and ecosystem responses to experimental warming and to background climate change across sites that span the major ecosystems of the Arctic. These files contain data representing the plant community composition and structure of Arctic System Science Program (ARCSS) grid plots at Utqiaġvik (formerly Barrow) and Atqasuk in a text comma delimited format. The 2010, 2013, 2016, and 2019 data were collected on all plots that were not under water: 98 plots at Utqiaġvik and 88 plots at Atqasuk. The 2012, 2014, 2015, 2017, and 2018 data were only collected on a subset of 30 plots at Utqiaġvik and 30 plots at Atqasuk, and the 2021 data were only collected on a subset of 30 plots at Utqiaġvik.北极生态系统正随北极变暖发生改变，而北极变暖的速率是全球平均水平的两倍有余。国际冻原实验计划（International Tundra Experiment, ITEX）于20世纪90年代初启动，旨在阐明增温与环境变异对冻原植被特征及生态系统功能的影响。该项目在覆盖北极主要生态系统的多类样点中，精准检测了冻原植物与生态系统对实验增温和背景气候变化的响应，具有极高的科研价值。本数据集以逗号分隔文本格式存储，涵盖北极系统科学计划（Arctic System Science Program, ARCSS）在乌特恰维克（Utqiaġvik，原名为巴罗）与阿特萨苏克（Atqasuk）两地的网格样地的植物群落组成与结构相关数据。其中，2010、2013、2016及2019年的数据采集自所有非水淹样地：乌特恰维克98个样地，阿特萨苏克88个样地。2012、2014、2015、2017及2018年的数据仅采集自乌特恰维克与阿特萨苏克各30个样地的子集，2021年的数据则仅采集自乌特恰维克的30个样地子集。