文章基本信息

标题：Sledovanie vplyvu zvýšenej teploty a depozície dusíka na alpínske lúky – výskumná plocha Kráľova hoľa (Nízke Tatry)
其他标题：Monitoring of Effects of Experimental Warming and Increased Nitrogen Deposition on Alpine Meadows – Research Plot Kráľova hoľa (Low Tatra Mts.).
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作者：Andrej Halabuk ; Andrej Bača ; Stanislav David 等
期刊名称：Životné prostredie
印刷版ISSN：0044-4863
电子版ISSN：2585-7800
出版年度：2016
卷号：50
期号：1
页码：44-50
出版社：Institute of Landscape Ecology of the Slovak Academy of Sciences
摘要：We established 24 experimental plots in Kráľova hoľa research site in the Low Tatra Mts. The plots were instrumented by air temperature, soil temperature and soil moisture sensors with data loggers. A complex vegetation analysis was performed including the assessment of species composition abundance, and estimation of aboveground phytomass. We installed 12 open-top chambers (OTC) in order to elevate temperature on experimental plots at the beginning of vegetation season. Continual monitoring of microclimate has preliminarily proved suitability of OTC for increasing of soil and air temperature up to 1–3 °C on average. During the whole season we regularly monitored reaction of alpine grassland ecosystem on changed microclimate and increased nitrogen inputs through the analyses of spectral vegetation indices and littr decomposition rates. The preliminary results indicate that due to high spatial and temporal variability of the simulated effcts on measured indicators, the effcts have not proven to be statistically signifiant and longer-term measurements are still necessary to reveal signifiant trends.
关键词：alpine meadows; litter decomposition; species composition; normalized diffrentiated vegetation index ;NDVI; spectral vegetation indices; aboveground phytomass