The spatial distribution and emission of nitrous oxide (N2O) in a large eutrophic lake in eastern China: anthropogenic effects.
The spatial distribution and emission of nitrous oxide (N2O) in a large eutrophic lake in eastern China: anthropogenic effects.
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DOI：
10.1016/j.scitotenv.2008.10.037
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发表时间：
2009-05
期刊：
影响因子：
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通讯作者：
Shi-lu Wang;Congqiang Liu;K. Yeager;G. Wan;Jun Yu Li;F. Tao;Yingchun Lu;Fa-min Liu;C. Fan-C.-F
中科院分区：
文献类型：
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作者：
Shi-lu Wang;Congqiang Liu;K. Yeager;G. Wan;Jun Yu Li;F. Tao;Yingchun Lu;Fa-min Liu;C. Fan-C.-F
中国的N2O排放在全球范围内具有重要意义，但在许多淡水环境中进行的直接观测相对较少，而淡水环境最有可能是N2O产生的重要场所。本文对中国东部生态非均质富营养化太湖及其周边河流的N2O饱和度进行了研究。并与太湖流域其他景观的N2O排放量进行了比较。研究发现，人为增加的无机氮输入仅在湖泊重度富营养化部分对N2O饱和度的空间分布起有限的主要控制作用，总体而言，高氮输入并没有像预期的那样显著提高湖泊N2O的生产和排放。相比之下，严重富营养化的河网是当地N2O收支的重要组成部分，当与湖泊N2O排放一起考虑时，构成了太湖流域N2O总排放量的主要部分（10-50%，具体取决于季节）。
The emission of N2O from China is globally significant, but relatively few direct observations have been made in many of the fresh water environments most likely to be important sites of N2O production. In this paper, N2O saturations were examined in the ecologically heterogeneous, eutrophied, Lake Taihu, as well as in surrounding rivers in eastern China. The emissions of N2O were estimated and compared with those from other landscapes within the Lake Taihu drainage basin. We found that anthropogenically-enhanced inorganic N inputs act as a limited primary control on the spatial distribution of N2O saturations in heavily eutrophied parts of the lake only and that overall, lake N2O production and emission are not raised as significantly as expected due to high N inputs. In comparison, the heavily eutrophied river network is an important fraction of the local N2O budget, and when considered together with emissions of N2O from the lake, constitute a major (10–50% depending on season) fraction of total N2O emissions from the Lake Taihu drainage basin.