THIS IS A TEST: The MARAS dataset, vegetation and soil characteristics of dryland rangelands across Patagonia

THIS IS A TEST: We present the MARAS (Environmental Monitoring of Arid and Semiarid Regions) dataset, which stores vegetation and soil data of 426 rangeland monitoring plots installed throughout Patagonia, a 624.500 km2 area of southern Argentina and Chile. Data for each monitoring plot includes basic climatic and landscape features, photographs, 500 point intercepts for vegetation cover, plant species list and biodiversity indexes, 50-m line-intercept transect for vegetation spatial pattern analysis, land function indexes drawn from 11 measures of soil surface characteristics and laboratory soil analysis (pH, conductivity, organic matter, N and texture). Monitoring plots were installed between 2007 and 2019, and are being reassessed at 5-year intervals (247 have been surveyed twice). The MARAS dataset provides a baseline from which to evaluate the impacts of climate change and changes in land use intensity in Patagonian ecosystems, which collectively constitute one of the world´s largest rangeland areas. This dataset will be of interest to scientists exploring key ecological questions such as biodiversity-ecosystem functioning relationships, plant-soil interactions and climatic controls on ecosystem structure and functioning.

测试示例：本研究发布了MARAS（Environmental Monitoring of Arid and Semiarid Regions，干旱与半干旱区域环境监测）数据集，该数据集收录了布设覆盖巴塔哥尼亚全域的426个牧场监测样地的植被与土壤数据。巴塔哥尼亚地处阿根廷与智利南部，总面积达624500平方公里。每个监测样地的相关数据涵盖基础气候与景观特征、影像资料、用于植被盖度调查的500个点截法（point intercepts）测点、植物物种名录与生物多样性指数、用于植被空间格局分析的50米样线拦截法（line-intercept transect）样带，以及基于11项土壤表面特征指标与实验室土壤分析（pH值、电导率（conductivity）、有机质（organic matter）、氮（N）与土壤质地（texture））得到的土地功能指数。监测样地于2007年至2019年间布设，并以5年为间隔开展重测工作（其中247个样地已完成两次调查）。巴塔哥尼亚是全球规模最大的牧场分布区域之一，MARAS数据集可为评估该区域内气候变化与土地利用强度变化的影响提供基准基线。本数据集对探索以下核心生态学问题的科研人员具有重要参考价值：生物多样性与生态系统功能的关联机制、植物-土壤相互作用，以及气候对生态系统结构与功能的调控规律。