Photosynthetic rates of leaves from reduced and enhanced precipitation treatments at the Jornada Basin LTER site, 2007-2008

This data package contains photosynthetic rate data for leaves collected from mesquite shrubs and black grama grasses at the Jornada Basin LTER site in 2007-2008. The purpose of this study was to quantify ecophysiological performance of shrubs and grasses in the context of precipitation manipulations. One mesquite and one black grama leaf from each plot (n = 20 plots; 5 PPT treatments X 4 replicate plots/treatment) were measured 5 times beginning July 2007 and ending in August 2008. Plots were subjected to precipitation treatments consisting of +/-80%, +/-50%, and ambient/control. A subset of plots also had a nitrogen addition treatment. Leaves were excised from plants and immediately measured for photosynthetic rate under ideal conditions in a LiCor cuvette. This study has been completed.本数据包收录了2007-2008年于霍罗尼玛盆地长期生态研究（Long-Term Ecological Research, LTER）站点采集的牧豆灌木与黑格兰马草的叶片光合速率数据。本研究旨在量化降水调控场景下灌木与草本植物的生理生态表现。每个样地各选取1片牧豆灌木叶片与1片黑格兰马草叶片开展测量，共计20个样地，包含5种降水（PPT）处理×4个重复样地/处理，测量工作于2007年7月至2008年8月期间共进行5次。样地所受降水调控处理包括±80%、±50%降水梯度以及自然降水对照组；部分样地额外施加了氮添加处理。研究人员从植株上剪下叶片后，即刻在LiCor样品室中于理想环境条件下测定其光合速率。本研究已完成。