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Jun

13

2007
 
 

Soaking up the C



Anthropogenic nitrogen can help forests absorb anthropogenic carbon

hope that we're growing out of trouble?The amount of carbon locked up by temperate and boreal forests is strongly influenced by how much nitrogen is available, according to a study published this week in Nature. Federico Magnani, a forestry scientist at the University of Bologna, Italy, and a large group of international collaborators, conducted a carefully controlled analysis of fine-scale data on nitrogen flux and forest growth time-series across Western Europe and North America. After accounting for factors such as wildfire, disease outbreaks, harvesting and other types of disturbance, nitrogen availability emerged as the major influence on forest growth. As anthropogenic nitrogen sources sky rocket, their fertilizing effect on high latitude forests is taking the edge off the worst excesses of our carbon addiction. We should be grateful for small mercies. Source: Magnani F, Mencuccini M, Borghetti M, Berbigier P, Berninger F, Delzon S, Grelle A, Hari P, Jarvis PG, Kolari P, Kowalski AS, Lankreijer H, Law BE, Lindroth A, Loustau D, Manca G, Moncrieff JB, Rayment M, Tedeschi V, Valentini R & Grace J (2007) The human footprint in the carbon cycle of temperate and boreal forests. Nature DOI: 10.1038/nature05847

Related story in Conservation magazine: That Sinking Feeling

Image © Nick Atkinson

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