Robson Creek Rainforest, Five Photopoint Image Collection

High quality digital site reference images are captured for the core 1 hectare vegetation plot of the site on an annual basis to provide context for researchers to understand the general layout and vegetation of the study site, and as a visual reference to monitor any changes over time. Photopoints will be taken annually using the five point photopoint method. The set of images for each year usually consists of twenty images: four images taken at each corner of the plot facing each of the four cardinal points, and four images taken from the center of the plot facing each corner.

The 25 hectare site was established in 2009 and lies on the Atherton Tablelands in the wet tropical rainforests of Australia at 680-740 m elevation. It is situated in Danbulla National Park within the Wet Tropics World Heritage Area. The forest is classified as Regional Ecosystem (RE) 7.3.36a, complex mesophyll vine forest (Queensland Government 2006). The climate is seasonal with approximately 60% of rain falling between January and March and the landform is moderately inclined with a low relief. There are 208 species in the site, and average canopy height is 28 m, ranging from 23 to 44 m. All stems ≥ 10 cm diameter are measured, tagged and mapped. For additional site information, see https://www.tern.org.au/tern-observatory/tern-ecosystem-processes/robson-creek-rainforest-supersite/.

Other bioimages collected at the site include digital hemispherical photography, phenocam images taken from fixed under and overstorey cameras and ancillary images of fauna and flora.

本数据集每年针对样地的核心1公顷植被样地采集高质量实地参考影像，旨在为研究人员提供研究样地的整体布局与植被概况背景，并作为可视化参考以监测随时间推移发生的变化。每年将采用五点摄影点法（five point photopoint method）采集影像，每年度的影像集通常包含20张：在样地的四个角点各拍摄4张分别朝向四个方位基点的影像，另从样地中心拍摄朝向每个角点的4张影像。

该25公顷样地于2009年设立，坐落于澳大利亚湿润热带雨林区的阿瑟顿台地（Atherton Tablelands），海拔680-740米。样地位于世界自然遗产“湿润热带”范围内的丹布拉国家公园（Danbulla National Park）内。该森林被归类为区域生态系统（Regional Ecosystem，RE）7.3.36a，即复杂叶层藤本林（昆士兰州政府，2006年）。气候具有季节性特征，约60%的降雨集中于1月至3月；地形为缓倾斜低起伏地貌。样地内共记录有208个物种，平均冠层高度为28米，范围介于23至44米之间。所有直径≥10厘米的茎干均会被测量、标记并绘制位置图。如需获取更多样地信息，请访问：https://www.tern.org.au/tern-observatory/tern-ecosystem-processes/robson-creek-rainforest-supersite/。

本样地采集的其他生物影像还包括数字半球摄影影像、由固定于林下层与林上层的相机拍摄的物候相机（phenocam）影像，以及动植物的辅助影像。