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.本数据集源自论文《恢复性疏伐加速多龄洪水依赖型森林中小乔木生长并抑制大乔木生长》（Restoration thinning accelerates small tree growth but slows large tree growth in a multi-age flood-dependent forest）。数据采集于2015年至2021年间澳大利亚墨累谷国家公园的河岸红桉林内。数据集包含1980株乔木的胸径（diameter at breast height，字段名为diameter.mm）数据，约每年开展一次测量，测量精度精确至1毫米；两次调查的时间间隔以十进制年份记录（years.elapsed，即两次调查日期之间的时间跨度）。对于多茎干乔木，其胸径通过各茎干直径平方和的平方根计算得出。数据集还涵盖两类水分可利用性相关指标：一是长期水分可利用性（立地质量，site.quality），二是短期水分可利用性——上游亚拉旺加堰年均过坝径流量（meanflo）。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每公顷林木初始株数（initdensity）以及疏伐移除的初始株数占比（pthin）。更多详细信息可参阅该论文手稿。