De Schrijver An, Verheyen Kris, Mertens Jan, Staelens Jeroen, Wuyts Karen, Muys Bart
Laboratory of Forestry, Ghent University, Geraardsbergse Steenweg 267, 9090 Gontrode, Belgium.
Nature. 2008 Feb 14;451(7180):E1; discussion E3-4. doi: 10.1038/nature06578.
Magnani et al. found that net carbon (C) sequestration of temperate and boreal forests is clearly driven by nitrogen (N) deposition. From the positive relationship between average net ecosystem production (NEP) and wet N deposition, the authors further conclude that "no signs of N saturation were apparent" in the studied forests and that this is "casting doubts on the risk of widespread ecosystem nitrogen saturation". Nitrogen additions can clearly alter net ecosystem production, but net ecosystem production cannot be used as an indicator of N saturation.
马尼亚尼等人发现，温带和北方森林的净碳固存明显受到氮沉降的驱动。基于平均净生态系统生产力（NEP）与湿氮沉降之间的正相关关系，作者进一步得出结论，在所研究的森林中“没有明显的氮饱和迹象”，并且这“使人对广泛的生态系统氮饱和风险产生怀疑”。添加氮显然可以改变净生态系统生产力，但净生态系统生产力不能用作氮饱和的指标。
