River red gum restoration thinning trial tree growth dataset

Data used in publication "Restoration thinning accelerates small tree growth but slows large tree growth in a multi-age flood-dependent forest". Data were collected in river red gum forests in Murray Valley National Park, Australia, between 2015 and 2021. Data include diameter at breast height (diameter.mm) for 1980 trees measured to the nearest mm approximately annually (time elapsed between survey dates in decimal years, years.elapsed). For multi-stemmed trees, diameter.mm was calculated by taking square root of the sum of each diameter squared. Data also include information about long-term water availability (site.quality) and short-term water availability (mean annual river flow through the upstream Yarrawonga weir, meanflo). Two-thirds of sites were subject to restoration thinning treatments and the data include the count of trees per hectare prior to thinning (initdensity) and the proportion of initial trees per hectare that were removed by thinning (pthin). Further details are available in the manuscript.

本数据集用于发表论文《洪水依赖型多龄级森林中恢复性疏伐可促进小径木生长却抑制大径木生长》（原英文标题："Restoration thinning accelerates small tree growth but slows large tree growth in a multi-age flood-dependent forest"）。数据集采集于2015年至2021年间澳大利亚墨累谷国家公园的河岸红桉（river red gum）林。数据集包含1980株树木的胸径（diameter at breast height）数据，以diameter.mm为字段名，测量精度精确至1毫米，调查频次约为每年1次，同时记录了各次调查间隔的时长（以years.elapsed为字段名，单位为十进制年份）。对于多茎干树木，其diameter.mm值通过计算各茎干直径的平方和并开平方得到。数据集还包含长期水分可利用性数据（以site.quality为字段名），以及短期水分可利用性数据，后者为雅若旺加堰（Yarrawonga weir）上游的年均径流量（以meanflo为字段名）。三分之二的样地接受了恢复性疏伐处理，数据集同时包含疏伐前的单位公顷株数（以initdensity为字段名）以及疏伐移除的初始单位公顷株数占比（以pthin为字段名）。更多详细信息可参阅该论文原稿。