Plant phenology and performance in the International Tundra Experiment plots at Barrow and Atqasuk, Alaska, 2018

These files contain data representing the periodic plant measures of all species within each plot in a text tab delimited format. The data presented are phenological development (date of leaf bud burst, inflorescence emergence, flower bud, flower opening, flower withering, seed development, seed dispersal, and senescence), seasonal growth (length of leaf, and length of inflorescence), seasonal flowering (number of inflorescences in flower within a plot), occurrence of events (yes or no for leaf, inflorescence, bud, flower, and seed), and annual growth and reproductive effort (number of leaves, diameter of rosette, number of branches, maximum leaf length, number of inflorescences, maximum inflorescence length, number of buds, number of flowers, and number of seeds) collected weekly or yearly for all plant species during the summers of 1994-2018 for 48 plots (24 experiment open-top chamber plots and 24 control plots) at four sites (Atqasuk Wet Meadow, Atqasuk Dry Heath, Barrow Wet Meadow, and Barrow Dry Heath).本数据集以制表符分隔的文本格式存储，涵盖所有样地内各植物物种的周期性观测数据。所收录的观测指标包括： 1. 物候发育：叶芽萌发期、花序抽出期、现蕾期、开花期、花枯萎期、种子发育期、种子扩散期与衰老期； 2. 季节生长性状：叶长与花序长度； 3. 季节开花情况：样地内开花花序总数； 4. 事件发生记录：叶片、花序、芽、花及种子的发生与否（是/否）； 5. 年生长与繁殖投入：叶片数、莲座直径、分枝数、最大叶长、花序数、最大花序长、芽数、花数及种子数。 上述数据于1994至2018年夏季，每周或每年采集一次，覆盖4个研究站点的48个样地，其中24个为开放式顶部箱实验样地，剩余24个为对照样地；4个站点分别为阿特萨苏克湿草甸（Atqasuk Wet Meadow）、阿特萨苏克干石楠荒原（Atqasuk Dry Heath）、巴罗湿草甸（Barrow Wet Meadow）与巴罗干石楠荒原（Barrow Dry Heath）。