River red gum restoration thinning trial tree growth dataset

Data used in publication "<i>Restoration thinning accelerates small tree growth but slows large tree growth in a multi-age flood-dependent forest"</i>. 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.

本数据集支撑发表于论文《修复疏伐在多龄级洪水依赖型森林中促进小径木生长却抑制大径木生长》的研究。数据采集于2015年至2021年间澳大利亚墨瑞谷国家公园内的河岸红桉（river red gum）林分。数据集包含1980株树木的胸径（diameter.mm，单位：毫米）数据，测量精度为1毫米；两次调查的间隔时长以十进制年份记录（years.elapsed），调查频率约为每年一次。对于多茎干树木，其diameter.mm值通过各茎干直径平方和的平方根计算得到。数据集还涵盖两项水分可利用性相关指标：长期水分可利用性（site.quality，立地质量）以及短期水分可利用性指标（meanflo，即上游亚拉旺加堰的年均径流量）。三分之二的样地接受了修复疏伐处理，数据中包含疏伐前每公顷林木初始密度（initdensity）以及疏伐移除的初始每公顷林木占比（pthin）。更多详细信息可参阅该研究论文。