Sven Jonasson

TL;DR: The simulated future climate scenario lead to reduced N turnover, which could act to reduce the potential growth response of plants to elevated atmospheric CO2 concentration, indicating that ecosystem N loss is highly sensitive to changes and variability in amount and timing of precipitation.

TL;DR: A range of tundra plant communities were experimentally perturbed in 1984 by application of NPK-fertilizer to three stable and two frost-heaved sites and by removal of the dominant deciduous shrubs from the three stable tundRA sites.

TL;DR: In this paper, the authors synthesize information on nutrient cycling within, and between, the soil/microbial and the plant compartments of the ecosystems and integrate the cycling of nutrients with the turnover of organic matter and the carbon balance in tundra ecosystems.

TL;DR: In this paper, the authors studied the mineralization and nutrient distribution in plants and microbes in four arctic ecosystems at Abisko, Northern Sweden and Toolik Lake, Alaska, which have been subjected to longterm warming with plastic greenhouses.

TL;DR: In this article, the authors studied the ecosystem exchanges of CO2 and CH4 in a high arctic valley at Zackenberg, NE Greenland and found that the grassland was a significant source of CH4 with a mean efflux of 6.3 mg CH4 and sinks for CO2, with almost -170 mg CO2 m(-2) hr(-1).