Climate change impacts on Arctic soil and lake microbiomes

气候变化对北极土壤和湖泊微生物组的影响

• 批准号: 317948706
• 负责人: Professor Dr. Ulf Karsten
• 金额: --
• 依托单位: Eidgenössische Forschungsanstalt WSL - Wald-Schnee-Landschaft
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/317948706?language=en
• 关键词: Climate; change; impacts; Arctic; soil

Nowhere is climate change more visible than in the Arctic. CLIMARCTIC is aimed at studying the effect of climate change on the diversity and functional attributes of the High Arctic terrestrial microbiome and its role in ecosystem processes (N, P and C cycling) in soils and lakes. This information is needed to better predict the potential role these ecosystems play in the global climate system under future global change. We will combine in situ and laboratory measurements and experiments with a space for time substitution approach by studying the biodiversity and functioning of microbes along environmental gradients (temperature and moisture) in soils and lakes in Svalbard and Northern Norway. We will use next generation amplicon sequencing and meta-omics approaches with a particular focus on genes involved in carbon cycling (photosynthesis, respiration, CH4 production), and N and P cycling, desiccation, and protection against light stress. Paleolimnological reconstructions of lake sediment cores will provide a longer-term perspective (past 200 years) on the rate and amplitude of changes in the food web structure, biodiversity and C, N and P concentrations and their retention in the catchment. These data will be used to predict ecosystem functioning under future climate changes based on a combined soil and lake nutrient budget-ecosystem model. The results of our study will be communicated to a variety of stakeholders including the media, national conservation bodies and international science policy initiatives such as the Arctic Council and the IPCC.

北极是气候变化最明显的地方。CLIMARCTIC旨在研究气候变化对高北极陆地微生物群落多样性和功能属性的影响及其在土壤和湖泊生态系统过程（N、P和C循环）中的作用。需要这些信息来更好地预测这些生态系统在未来全球变化下在全球气候系统中发挥的潜在作用。我们将结合现场和实验室测量和实验，采用空间代替时间的方法，研究斯瓦尔巴群岛和挪威北部土壤和湖泊中沿环境梯度（温度和湿度）的微生物的生物多样性和功能。我们将使用下一代扩增子测序和元组学方法，特别关注与碳循环（光合作用，呼吸作用，CH4产生），氮和磷循环，干燥和对光胁迫保护有关的基因。湖泊沉积物岩心的古湖泊学重建将提供一个更长期的视角（过去200年），了解食物网结构、生物多样性和碳、氮、磷浓度及其在流域中的保留的变化速率和幅度。这些数据将用于基于土壤和湖泊营养收支-生态系统组合模型预测未来气候变化下的生态系统功能。我们的研究结果将传达给各种利益相关者，包括媒体，国家保护机构和国际科学政策倡议，如北极理事会和政府间气候变化专门委员会。