国际苔原实验(ITEX):30年来对苔原生态系统的研究

IF 2.7 3区 地球科学 Q2 ECOLOGY Arctic Science Pub Date : 2022-09-01 DOI:10.1139/as-2022-0041
G. Henry, R. Hollister, K. Klanderud, R. Björk, Anne D. Bjorkman, Cassandra Elphinstone, I. Jónsdóttir, U. Molau, A. Petraglia, S. Oberbauer, C. Rixen, P. Wookey
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引用次数: 7

摘要

国际冻土带实验(ITEX)成立于1990年,是一个由科学家组成的网络,研究冻土带生态系统对全球北极和高山地区环境和实验性气候变化的反应。共同的测量和实验设计方案促进了跨站点结果的综合,以获得气候变化对冻土带影响的生物群落范围的见解。本期特刊介绍了ITEX 30多年来的研究成果。强调了雪况、苔藓植物和草食植物的重要性,并提出了新的方案和研究。极端气候事件的频率和强度的增加对植物繁殖产生了强烈的影响。不同立地间最一致的植物性状响应是植被高度的增加,尤其是灌木。这将影响地表能量平衡、碳和养分动态以及营养水平的相互作用。常见的园林研究表明,冻土带物种对气候变化有适应反应,但这是物种和区域特有的。提出的建议包括在北部社区附近建立站点,以增加与当地知识持有人的相互接触,并建立多因素实验。ITEX的成功是基于研究人员之间的合作,该网络仍然专注于记录和理解环境变化对冻土带生态系统的影响。
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The International Tundra Experiment (ITEX): 30 years of research on tundra ecosystems
The International Tundra Experiment (ITEX) was founded in 1990 as a network of scientists studying responses of tundra ecosystems to ambient and experimental climate change at Arctic and alpine sites across the globe. Common measurement and experimental design protocols have facilitated synthesis of results across sites to gain biome-wide insights of climate change impacts on tundra. This special issue presents results from more than 30 years of ITEX research. The importance of snow regimes, bryophytes, and herbivory are highlighted, with new protocols and studies proposed. The increasing frequency and magnitude of extreme climate events is shown to have strong effects on plant reproduction. The most consistent plant trait response across sites is an increase in vegetation height, especially for shrubs. This will affect surface energy balance, carbon and nutrient dynamics and trophic level interactions. Common garden studies show adaptation responses in tundra species to climate change but they are species and regionally specific. Recommendations are made including establishing sites near northern communities to increase reciprocal engagement with local knowledge holders and establishing multi-factor experiments. The success of ITEX is based on collegial cooperation among researchers and the network remains focused on documenting and understanding impacts of environmental change on tundra ecosystems.
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来源期刊
Arctic Science
Arctic Science Agricultural and Biological Sciences-General Agricultural and Biological Sciences
CiteScore
5.00
自引率
12.10%
发文量
81
期刊介绍: Arctic Science is an interdisciplinary journal that publishes original peer-reviewed research from all areas of natural science and applied science & engineering related to northern Polar Regions. The focus on basic and applied science includes the traditional knowledge and observations of the indigenous peoples of the region as well as cutting-edge developments in biological, chemical, physical and engineering science in all northern environments. Reports on interdisciplinary research are encouraged. Special issues and sections dealing with important issues in northern polar science are also considered.
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