Long-term population dynamics of individually mapped Sonoran Desert winter annuals from the Desert Laboratory, Tucson AZ

Desert annual plants have played an important role as model organisms in the development of understanding of how organisms adapt to variable and unpredictable environments. They have also been used to exemplify ideas about non-equilibrium community dynamics. The goal of this data set is to provide a comprehensive long-term data set on demographic variation and covariation for a guild of desert winter annual plants. Germination, survival fecundity and seed bank dynamics have been assessed on a set of permanent plots since 1982 at the Desert Laboratory in Tucson, Arizona. Data is provided for individual plant including germination date, death date, fecundity, viable seed bank and in some years, Cartesian coordinates within plots. Viable seed densities for replicated soil samples are provided for all species since 1990. A species by year summary of vital rates is also provided.

荒漠一年生植物作为模式生物（model organism），在阐明生物适应多变且不可预测环境的研究进程中发挥了关键作用，同时也被用于阐释非平衡群落动态的相关理论。本数据集旨在为一类荒漠冬季一年生同资源种团（guild）提供一套涵盖长期种群动态变异与协变关系的综合数据集。自1982年起，位于亚利桑那州图森市的荒漠实验室（Desert Laboratory, Tucson, Arizona）已在多块永久样地中对萌发、存活、繁殖力（fecundity）以及种子库动态开展长期监测。本数据集包含单株植物的相关数据，具体包括萌发日期、死亡日期、繁殖力、有效种子库信息；部分年份还记录了单株在样地内的笛卡尔坐标（Cartesian coordinates）。自1990年起，数据集为所有物种提供了重复土壤样品的有效种子密度数据。此外还提供了按物种-年份汇总的生活史关键速率（vital rates）统计表格。