Microclimate variability of Antarctic terrestrial ecosystems manipulated by open top chambers: Comparison of selected austral summer seasons within a decade

IF 0.5 Q4 ECOLOGY
M. Barták, K. Láska, J. Hájek, P. Váczi
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引用次数: 2

Abstract

Open top chambers (OTCs) were established in the northern part of the James Ross Island, Antarctic Peninsula, as a part of long-term program in January 2007. They were installed in two typical locations differing in vegetation cover. First group was set in a seashore ecosystem dominated by moss carpet supplemented with few lichen species. The other group was located on the top of a volcanic mesa (350 m a.s.l.) with irregular cover of lichens Usnea antarctica and Umbilicaria decussata. Temperature regimes inside and outside OTCs were continuously measured and related to year-round reference meteorological data. For majority of OTC installations, temperature increase caused by OTC was apparent in the period of September-March. Detailed analysis of chamber effect on the increase in air, surface, vegetation, and ground temperatures was done for late austral summer seasons of 2007 and 2008, and 10 years later, the seasons of 2017 and 2018. The OTC-induced temperature increase was more pronounced for mesa than seashore plot. For both locations, OTC-induced increase in temperature was highest for warm days with full sunshine and limited wind speed. On stormy days with overcast sky and high wind speed, the shift in temperature was smaller. Consequences of a long-term manipulation of Antarctic terrestrial ecosystems by OTCs for moss and lichen ecophysiology are discussed.
开顶室控制下南极陆地生态系统的小气候变率:十年来选定的南方夏季的比较
2007年1月,作为长期项目的一部分,在南极半岛詹姆斯罗斯岛北部建立了开放式顶舱(OTCs)。它们被安装在两个典型的不同植被覆盖的地点。第一组被设置在以苔藓地毯为主的海滨生态系统中,并辅以少量地衣物种。另一组位于火山台地的顶部(海拔350米),上面覆盖着不规则的南极地衣和脐草。连续测量场外otc内外的温度状况,并与全年参考气象数据相关联。对于大多数OTC装置,OTC引起的温度升高在9月至3月期间明显。详细分析了2007年和2008年南方夏末季节以及10年后的2017年和2018年季节的室内效应对空气、地表、植被和地面温度升高的影响。otc诱导的温度升高在台地比滨海地更为明显。在这两个地点,在日照充足、风速有限的温暖天气,otc引起的温度升高最高。在阴天、风速大的暴风雨天气,气温变化较小。讨论了otc长期操纵南极陆地生态系统对苔藓和地衣生态生理的影响。
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来源期刊
Czech Polar Reports
Czech Polar Reports Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
CiteScore
1.30
自引率
10.00%
发文量
22
期刊介绍: Czech Polar Reports is an international, multidisciplinary, peer-reviewed journal. It is issued 2 times a year. The journal is dedicated to provide original research papers for sciences related to the polar regions and other planets with polar analogues. Czech Polar Reports covers the disciplines listed below. polar paleontology, geology, geochemistry, geomorphology, glaciology, climatology, hydrology, pedology, biochemistry, ecology, environmental science, microbiology, plant and animal biology including marine biology.
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