Total Annual Aboveground Net Primary Productivity across grassland-shrubland ecotones at 3 sites in the Jornada Basin, 2006-ongoing

The objective of this ongoing study is to investigate how pulses of precipitation translate into pulses of plant aboveground net primary productivity (NPP) across grassland to shrubland ecotones in the northern Chihuahuan Desert. This dataset consists of annual aboveground net primary productivity estimates in three habitat vegetation zones (grassland, ecotone, and shrubland) at three grassland-to-shrubland ecotone sites in the Jornada Basin, Dona Ana County, New Mexico, USA. The annual ANPP estimates are derived from plant cover measurements (see methods). Due to its growth form, Yucca elata (YUEL) has been found to produce large errors in interyear biomass estimates. This data package contains annual ANPP estimates both with and without YUEL, but the authors strongly recommend using the non-YUEL estimates for most purposes. Data collection is ongoing with new observations in spring and fall of each year; data from both annual sampling times are required to estimate annual ANPP.本项正在开展的研究旨在探究奇瓦瓦沙漠北部草地-灌丛交错带中，降水脉冲如何转化为植物地上净初级生产力（aboveground net primary productivity, NPP）的脉冲。本数据集涵盖美国新墨西哥州多纳安娜县霍拉达盆地（Jornada Basin）内3处草地-灌丛交错带样点的3类生境植被带（草地、交错带、灌丛）的年度地上净初级生产力估算值。年度地上净初级生产力（aboveground net primary productivity, ANPP）估算值源自植物盖度测量（详见研究方法）。由于丝兰（Yucca elata, YUEL）的生长形态特性，其在年度间生物量估算中会引入显著误差。本数据包包含纳入YUEL与剔除YUEL的两类年度ANPP估算值，但作者强烈建议在多数研究场景下使用剔除YUEL的估算结果。数据采集工作仍在持续推进，每年春季与秋季均会开展新的观测；需结合两次年度采样的数据方可估算年度ANPP。