Leaf Area in the Clearcut Site at Harvard Forest 2010-2012

This dataset contributed to an estimate of leaf area by species at the Prospect Hill clearcut regeneration site, used in a publication to attribute measured changes in gross primary productivity over time to either changes in species composition and associated traits versus changes in total leaf area. The file reports data on leaf area by species from destructive harvest in select plots. It also reports leaf area and leaf weight from destructive harvest of the foliage of select individual species to characterize the vertical distribution of foliage for those species. Corresponding measurements of total plant area recorded with a LAI-2000 before and after harvest of this foliage is reported as well, useful for inferring the leaf versus stem/branch portions of light interception as needed for improved estimates of LAI with the light-interception method. Lastly, below we report the result of an August 2012 site-level survey of plant area index measured with the LAI-2000 and converted to leaf area index.

本数据集用于估算普罗斯佩克特山（Prospect Hill）皆伐更新样地内各物种的叶面积，相关研究成果已发表于学术论文，旨在将随时间推移测得的总初级生产力变化，归因于物种组成与相关性状的变化，或是总叶面积的变化。本数据集文件包含了基于选定样地破坏性采伐获取的各物种叶面积数据。同时，数据集还收录了针对选定单一物种的植被冠层开展破坏性采伐后得到的叶面积与叶重量数据，用于表征这些物种的植被冠层垂直分布特征。此外，本数据集还记录了在该植被冠层采伐前后，使用LAI-2000冠层分析仪测得的植株总面积数据；这些数据可用于区分冠层截光中的叶片与茎/枝占比，从而借助截光法更精准地估算叶面积指数（LAI）。最后，本数据集还收录了2012年8月在样地尺度开展的冠层面积指数实测结果（采用LAI-2000冠层分析仪测得），并将其转换为叶面积指数。