Open top chamber experiment carbon dioxide (CO2) elevation experiment at the Central Plains Experimental Range, Nunn, Colorado, USA

Datasets related to the Shortgrass Steppe Long-Term Ecological Research project and background information (proposals, reports, photographs, etc.) on the SGS-LTER project are contained in a comprehensive collection within the Repository (http://hdl.handle.net/10217/100254). The data tables and associated metadata documents, which are generated in Ecological Metadata Language, may be available through other repositories serving the ecological research community and represent components of the larger SGS-LTER project collection. The Open Top Chamber Experiment Carbon Dioxide (CO₂) Elevation Experiment was conducted in collaboration with partners at the USDA, Agricultural Research Service. Six open-top chambers were installed on the shortgrass steppe in north-eastern Colorado, USA from late March until mid-April from 1997 to 2001 to evaluate how this grassland will be affected by rising atmospheric CO₂. Three chambers were maintained at current CO₂ concentration (ambient treatment), three at twice ambient CO₂, or approximately 720 µmol mol-1 (elevated treatment), and three non-chambered plots served as controls. Each growing season, variables related to soil water, plant physiology, biomass production and community dynamics were measured.

本完整数据集合集收录了与短草草原长期生态研究（Shortgrass Steppe Long-Term Ecological Research，简称SGS-LTER）项目相关的全部数据集，以及该项目的各类背景资料（含研究提案、项目报告、实拍影像等），所有内容均存储于该学术仓储库（http://hdl.handle.net/10217/100254）中。以生态元数据语言（Ecological Metadata Language）格式生成的数据表及配套元数据文档，可通过面向生态研究社群的其他学术仓储库获取，且均属于SGS-LTER项目完整数据集合集的组成部分。本研究与美国农业部（United States Department of Agriculture，简称USDA）农业研究局的合作方共同开展了开顶箱二氧化碳（CO₂）富集实验。1997年至2001年的每年3月末至4月中旬，研究团队在美国科罗拉多州东北部的短草草原区域架设6台开顶箱，旨在探究大气CO₂浓度升高对该草原生态系统的影响。其中3台开顶箱维持当前大气CO₂背景浓度（背景处理组），另外3台维持两倍于背景浓度的CO₂环境，浓度约为720 µmol mol⁻¹（高浓度处理组），另设3块未安装开顶箱的样地作为空白对照。每个生长季，研究人员均会对土壤水分、植物生理特性、生物量生产以及群落动态等相关变量进行测定。

搜集汇总

背景与挑战

背景概述

该数据集源自1997年至2001年在美国科罗拉多州Central Plains Experimental Range进行的开放顶室二氧化碳（CO2）升高实验，是Shortgrass Steppe长期生态研究（SGS-LTER）项目的一部分。实验通过设置环境CO2、升高CO2和无室对照处理，旨在评估大气CO2升高对短草草原生态系统的影响，测量变量包括土壤水分、植物生理、生物量生产和群落动态等。