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The likely impact of elevated [CO2], nitrogen deposition, increased temperature and management on carbon sequestration in temperate and boreal forest ecosystems: a literature review

Forskningsöversiktsartikel
Författare R. Hyvonen
G. I. Agren
S. Linder
T. Persson
M. F. Cotrufo
A. Ekblad
M. Freeman
A. Grelle
I. A. Janssens
P. G. Jarvis
S. Kellomaki
A. Lindroth
D. Loustau
T. Lundmark
R. J. Norby
R. Oren
K. Pilegaard
M. G. Ryan
B. D. Sigurdsson
M. Stromgren
M. van Oijen
Göran Wallin
Publicerad i New Phytologist
Volym 173
Nummer/häfte 3
Sidor 463-480
ISSN 0028-646X
Publiceringsår 2007
Publicerad vid Institutionen för växt- och miljövetenskaper
Sidor 463-480
Språk en
Länkar <Go to ISI>://000243478900005
Ämnesord carbon balance, carbon dioxide (CO2), climate change, fertilization, global warming, SOIL ORGANIC-MATTER, LEAF-LITTER DECOMPOSITION, GROSS PRIMARY PRODUCTION, NET PRIMARY PRODUCTION, FOREST, FINE-ROOT PRODUCTION, ATMOSPHERIC CO2
Ämneskategorier Botanik, Terrestrisk ekologi, Växtproduktion, Markvetenskap

Sammanfattning

Temperate and boreal forest ecosystems contain a large part of the carbon stored on land, in the form of both biomass and soil organic matter. Increasing atmospheric [CO2], increasing temperature, elevated nitrogen deposition and intensified management will change this C store. Well documented single-factor responses of net primary production are: higher photosynthetic rate (the main [CO2] response); increasing length of growing season (the main temperature response); and higher leaf-area index (the main N deposition and partly [CO2] response). Soil organic matter will increase with increasing litter input, although priming may decrease the soil C stock initially, but litter quality effects should be minimal (response to [CO2], N deposition, and temperature); will decrease because of increasing temperature; and will increase because of retardation of decomposition with N deposition, although the rate of decomposition of high-quality litter can be increased and that of low-quality litter decreased. Single-factor responses can be misleading because of interactions between factors, in particular those between N and other factors, and indirect effects such as increased N availability from temperature-induced decomposition. In the long term the strength of feedbacks, for example the increasing demand for N from increased growth, will dominate over short-term responses to single factors. However, management has considerable potential for controlling the C store.

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