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Sammanfattning

To quantify potential nitrogen (N) deposition impacts on peatland carbon (C) uptake, we explored temporal and spatial trends in N deposition and climate impacts on the production of the key peat forming functional group (Sphagnum mosses) across European peatlands for the period 1900-2050. Using a modelling approach we estimated that between 1900 and 1950 N deposition impacts remained limited irrespective of geographical position. Between 1950 and 2000 N deposition depressed production between 0 and 25% relative to 1900, particularly in temperate regions. Future scenarios indicate this trend will continue and become more pronounced with climate warming. At the European scale, the consequences for Sphagnum net C-uptake remained small relative to 1900 due to the low peatland cover in high-N areas. The predicted impacts of likely changes in N deposition on Sphagnum productivity appeared to be less than those of climate. Nevertheless, current critical loads for peatlands are likely to hold under a future climate. (C) 2014 Elsevier Ltd. All rights reserved.

Nyckelord

Air pollution; Carbon balance; Critical load; Ecosystem change; Peat mosses

Publicerad i

Environmental Pollution
2014, volym: 187, sidor: 73–80

SLU författare

Globala målen (SDG)

SDG15 Ekosystem och biologisk mångfald

UKÄ forskningsämne

Miljövetenskap
Ekologi
Botanik

Publikationens identifierare

  • DOI: https://doi.org/10.1016/j.envpol.2013.12.023

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/53298