CO2 response (ACi) gas exchange by leaf age, Vcmax and Jmax parameters, Feb2017

This data package contains the CO2 response (ACi curves) gas exchange of sunlit canopy leaves of the species Guatteria dumetorum (GUATDU), Miconia borealis (MICOBO), Terminalia amazonia (TERMAM) and Vochysia ferruginea (VOCHFE) in February 2017. Sampled trees were located within the NGEE Tropics site at Bosque Protector San Lorenzo (PA-SLZ) in Panama. Carbon Dioxide (CO2) response measured on young, mature and old leaves collected before dawn on 3 days. Fitted Vc,max and Jmax photosynthetic parameters were derived from measured data. Within the attached zip file are three Excel files with metadata and a single data file "2017_SLZ_ACi_Vcmax," also in Excel format. A detailed description of data collection protocol is available in word document and PDF formats, and a visualization of the workflow is available as Powerpoint and PDF files. Microsoft Excel, Word, and Powerpoint software will be required. This data was collected as part of the 2017 Brookhaven National Laboratory (BNL) and Smithsonian Tropical Research Institute (STRI) leaf traits by age campaign. Additional datasets from this campaign include further sample details, leaf water potential, leaf spectra, diurnal gas exchange, sap flow, leaf mass area (LMA) and leaf chemistry data. This dataset was originally published on the NGEE Tropics Archive and is being mirrored on ESS-DIVE for long-term archival Acknowledgement: This research was supported as part of NGEE-Tropics, funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research under contract no. DE-SC0012704.

本数据包包含2017年2月采集的4个物种——灌丛圭巴栗（Guatteria dumetorum，GUATDU）、北腺棯（Miconia borealis，MICOBO）、亚马孙榄仁（Terminalia amazonia，TERMAM）以及锈色毒鼠子（Vochysia ferruginea，VOCHFE）的阳生冠层叶片CO₂响应（ACi曲线）气体交换数据。采样树木分布于巴拿马圣洛伦佐保护林（Bosque Protector San Lorenzo，PA-SLZ）内的NGEE Tropics研究站点。本次测定于3个日期的黎明前开展，采集对象为幼叶、成熟叶与老叶，并测定了其CO₂响应参数。基于实测数据拟合得到了最大羧化速率（Vc,max）与最大电子传递速率（Jmax）等光合参数。附带的压缩包内包含3份搭载元数据的Excel文件，以及1份同样为Excel格式、名为"2017_SLZ_ACi_Vcmax"的单一数据文件。数据采集规程的详细说明可通过Word文档与PDF格式获取，工作流程可视化文件则可通过Powerpoint与PDF格式获取。需使用Microsoft Excel、Word及Powerpoint软件方可查看相关内容。本数据集为2017年布鲁克海文国家实验室（Brookhaven National Laboratory，BNL）与史密森尼热带研究所（Smithsonian Tropical Research Institute，STRI）联合开展的「按叶龄划分叶片性状」研究项目的一部分采集所得。该项目的其他数据集还包含更多样本细节、叶片水势、叶片光谱、日变化气体交换、树干液流、叶面积干重比（Leaf Mass Area，LMA）以及叶片化学组分数据。本数据集最初发布于NGEE Tropics档案库，现由ESS-DIVE进行镜像归档以实现长期保存。致谢：本研究作为NGEE-Tropics项目的一部分得到资助，该项目由美国能源部科学办公室生物与环境研究局根据合同号DE-SC0012704提供支持。