Connell Rainforest Plot Network: Tropical Rainforest Understorey Light Environment Data, Davies Creek Plot, Dinden National Park, Queensland, Australia, 2013+

This data package comprises data from a series of hemispherical photographs taken in 2013 and 2015 at the Connell Rainforest Plot which is situated at Davies Creek, Dinden National Park, 25 km south west of Cairns, Queensland. The 1.7 ha plot consists of mapped and tagged trees in all size classes from tiny seedlings to large canopy trees. Rates of recruitment, growth and mortality have been measured at intervals of 1-6 years with records extending back to 1963.

The primary determinant of growth rate in the understorey is light. Gaps created by the death of large canopy trees have been systematically surveyed many times over the decades until 2002, with the boundaries of the gaps being noted on hand drawn maps. These maps have never been digitized, and the originals are held at the University of California. Copies of some later maps are held by Green at La Trobe University. A digital camera with a fish-eye lens was used for the first time in 2013 to measure understorey light environments along the seedling transects. A synopsis of related data packages which have been collected as part of the Connell Rainforest Plot Network’s full program is provided at http://www.ltern.org.au/index.php/ltern-plot-networks/connell-rainforest.

本数据集包含2013年与2015年，在昆士兰州凯恩斯市西南25公里处的戴维斯溪、丁登国家公园内的康奈尔雨林样地（Connell Rainforest Plot）采集的一系列半球摄影照片数据。该样地面积为1.7公顷，涵盖了从细小幼苗到大型冠层树木的所有径级的已测绘并标记的树木个体；样地内的树木更新率、生长速率与死亡率均以1至6年为间隔进行测定，相关监测记录最早可追溯至1963年。
林下植被生长速率的核心影响因子为光照条件。大型冠层树木死亡后形成的林隙，在2002年之前的数十年间已被多次系统调查，林隙边界均标注于手绘地图之上。此类地图从未被数字化，原版存档于加利福尼亚大学；部分后期地图的副本由拉筹伯大学的格林（Green）保管。2013年，研究人员首次使用搭载鱼眼镜头（fish-eye lens）的数码相机，沿幼苗样带测定林下光照环境。作为康奈尔雨林样地网络（Connell Rainforest Plot Network）完整项目的一部分，相关数据集的概要信息可通过以下链接获取：http://www.ltern.org.au/index.php/ltern-plot-networks/connell-rainforest。