Events hidden in winter warming: Effects of recurrent soil freeze-thaw cycles on ecosystem functions in the temperate zone

冬季变暖隐藏的事件：土壤反复冻融循环对温带生态系统功能的影响

• 批准号: 134511992
• 负责人: Professorin Dr. Anke Jentsch
• 金额: --
• 依托单位: Lehrstuhl für Störungsökologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/134511992?language=en
• 关键词: Events; hidden; winter; warming; Effects

Ongoing global warming is expected to increase the recurrence of soil freeze-thaw cycles (FTC) in cool-temperate regions due to decreases in snow cover and increased variability of air temperature in winter. FTC currently occur in more than half of the northern hemisphere, therefore it is important to explore the ecological implications of their altered regimes due to climate change. Knowledge of FTC effects on plant communities is scarce, although plants may be the decisive factor in controlling ecosystem functions such as nutrient retention. Evidence suggests that FTC alter plant productivity, carbon allocation and competition between. Shifts in frequency and timing of FTC are capable of altering ecosystem stability and ecosystem services, vegetation composition and species distributions. Nutrient cycling is altered via physical disruption and changes in microbial activity, leading to nutrient leaching and trace gas loss. These processes indirectly affect human interests (e.g. productivity, water quality, greenhouse gas emissions). We want to analyze effects of intensified FTC in winter for the biomass production of grassland and heath in a field experiment, thereby also exploring processes behind effects of FTC on plants addressing N-nutrition, photosynthetic activity, root injury, and biotic interactions such as plant competition and root mycorrhization.

持续的全球变暖预计将增加土壤冻融循环（FTC）在冷温带地区，由于积雪减少和冬季气温的变化增加。FTC目前发生在北方的一半以上，因此，重要的是要探讨其改变的制度，由于气候变化的生态影响。尽管植物可能是控制生态系统功能（如养分保持）的决定性因素，但有关FTC对植物群落影响的知识很少。有证据表明，FTC改变植物生产力，碳分配和之间的竞争。FTC频率和时间的变化能够改变生态系统的稳定性和生态系统服务，植被组成和物种分布。养分循环通过物理破坏和微生物活性的变化而改变，导致养分沥滤和微量气体损失。这些过程间接影响到人类的利益（例如生产力、水质、温室气体排放）。我们要分析的影响，加强FTC在冬季的草地和健康的生物量生产的田间试验，从而也探索背后的过程FTC对植物的影响解决氮营养，光合活性，根损伤，和生物相互作用，如植物竞争和根菌根化。

项目成果

Recurrent winter warming pulses enhance nitrogen cycling and soil biotic activity in temperate heathland and grassland mesocosms

周期性的冬季变暖脉冲增强了温带石南地和草原中生态系统的氮循环和土壤生物活性

• DOI: 10.5194/bgd-11-7797-2014
• 发表时间: 2014
• 期刊: Biogeosciences Discussions
• 作者: Schürings J;Jentsch A;Hammerl V;Lenz K;Kreyling J
• 通讯作者: Kreyling J

Nitrogen leaching is enhanced after a winter warm spell but mainly controlled by vegetation composition in temperate zone mesocosms

冬季暖期后氮淋溶增强，但主要受温带中生态系统植被组成控制

• DOI: 10.1007/s11104-015-2587-1
• 发表时间: 2015
• 期刊: Plant and Soil
• 影响因子: 4.9
• 作者: Kreyling J;Schürings J;Malyshev A;Vogt L;Werner;Jentsch A
• 通讯作者: Jentsch A

Winter warming pulses differently affect plant performance in temperate heathland and grassland communities

冬季变暖脉冲对温带石南地和草原群落的植物性能产生不同的影响

• DOI: 10.1007/s11284-014-1174-x
• 发表时间: 2014
• 期刊: Ecological Research
• 影响因子: 2
• 作者: Schürings J;Jentsch A;Kreyling J
• 通讯作者: Kreyling J

Absence of soil frost affects plant-soil interactions in temperate grasslands

• DOI: 10.1007/s11104-013-1724-y
• 发表时间: 2013-04
• 期刊: Plant and Soil
• 影响因子: 4.9
• 作者: Jan Schuerings;C. Beierkuhnlein;Kerstin Grant;A. Jentsch;Andrey V Malyshev;J. Peñuelas;J. Sardans;J. Kreyling