Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen

• Published in: Polish Polar Research
• Main Authors: Elster, J. (Josef), Kvíderová, J. (Jana), Hájek, T. (Tomáš), Láska, K., Šimek, M. (Miloslav)
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2012
• Subjects: global climate change; Nostoc; OTC; Climate change; Svalbard; Tundra; Spitsbergen
• Online Access: https://doi.org/10.2478/v10183-012-0021-4; http://hdl.handle.net/11104/0218678

In order to simulate the warming effects on Arctic tundra, three open-top chambers (OTC) and three control cage-like structures (CCSs) with soil temperature and soil volumetric water content probes were installed in a wet hummock measow in Svalbard in 2009. Prolonged vegetative season was observed in OTCs, however the temperature at hummock base was increased only by 0.3 °C in OTCs compared to CCSs. Photochemical activity and nitrogenase activity of Nostoc colonies did not differ significantly between OTCs and CCSs.