To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Combined climate factors … - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Combined climate factors alleviate changes in gross soil nitrogen dynamics in heathlands

Journal article
Authors Anna-Karin Björsne
Tobias Rütting
P. Ambus
Published in Biogeochemistry
Volume 120
Issue 1-3
Pages 191-201
ISSN 0168-2563
Publication year 2014
Published at Department of Earth Sciences
Pages 191-201
Language en
Keywords N-15 tracing, Climate change, Elevated CO2, Warming, Summer drought, Nitrogen cycle, ATMOSPHERIC CARBON-DIOXIDE, ELEVATED CO2, SUMMER DROUGHT, TERRESTRIAL, ECOSYSTEMS, TEMPERATE HEATHLAND, PROCESS RESPONSES, GRASSLAND SOIL, N, DYNAMICS, N-15, MODELS, Environmental Sciences, Geosciences, Multidisciplinary
Subject categories Earth and Related Environmental Sciences


The ongoing climate change affects biogeochemical cycling in terrestrial ecosystems, but the magnitude and direction of this impact is yet unclear. To shed further light on the climate change impact, we investigated alterations in the soil nitrogen (N) cycling in a Danish heathland after 5 years of exposure to three climate change factors, i.e. warming, elevated CO2 (eCO(2)) and summer drought, applied both in isolation and in combination. By conducting laboratory N-15 tracing experiments we show that warming increased both gross N mineralization and nitrification rates. In contrast, gross nitrification was decreased by eCO(2), an effect that was more pronounced when eCO(2) was combined with warming and drought. Moreover, there was an interactive effect between the warming and CO2 treatment, especially for N mineralization: rates increased at warming alone but decreased at warming combined with eCO(2). In the full treatment combination, simulating the predicted climate for the year 2075, gross N transformations were only moderately affected compared to control, suggesting a minor alteration of the N cycle due to climate change. Overall, our study confirms the importance of multifactorial field experiments for a better understanding of N cycling in a changing climate, which is a prerequisite for more reliable model predictions of ecosystems responses to climate change.

Page Manager: Webmaster|Last update: 9/11/2012

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?