Nitrogen leaching is enhanced after a winter warm spell but mainly controlled by vegetation composition in temperate zone mesocosms
Nitrogen leaching is enhanced after a winter warm spell but mainly controlled by vegetation composition in temperate zone mesocosms
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冬季暖期后氮淋溶增强，但主要受温带中生态系统植被组成控制
DOI：
10.1007/s11104-015-2587-1
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发表时间：
2015
期刊：
影响因子：
4.9
通讯作者：
Jentsch A
中科院分区：
文献类型：
--
作者：
Kreyling J;Schürings J;Malyshev A;Vogt L;Werner;Jentsch A
背景与目的氮从自然生态系统中流失造成了严重的环境问题。极端事件，如冬季暖期，可能通过破坏生物地球化学循环而加剧氮的淋失，并将随着预计的气候变化而变得更加频繁。方法利用溶渗仪在140个成熟的中生态系统中7种不同植被覆盖的2个具有不同冬季气候的试验点对12天冬季暖期的氮淋溶响应进行了研究。结果在冬末早春49 d的观测期内，平均N浸出率为3.4±0.4 mg N m−2d−1。冬季暖期导致氮淋失比暖期增加82%（最高可达18 mg N l−1）。较强的淋溶发生在较冷的地方，这可以解释为植物变得光合活跃，随后的霜冻损害了它们的地上组织，因为雪和/或去硬化失去了隔热，导致氮吸收减少。不同植被组成之间的氮淋溶差异达600 %，草地类型几乎没有淋溶，灌木类型淋溶程度最高，甚至超过裸地对照。结论冬季暖期影响温带生态系统的生物地球化学，植物生长性能和植被组成控制氮淋失量。
Background and aimsLeaching of nitrogen (N) from natural ecosystems poses serious environmental problems. Extreme events such as winter warm spells could exacerbate N leaching by disrupting biogeochemical cycles and will become more frequent with the projected climate change.MethodsWe used lysimeters to investigate N leaching in response to a 12-day winter warm spell at two field sites with contrasting winter climate and in seven different vegetation covers in 140 well established mesocosms.ResultsMean rates of N leaching reached 3.4 ± 0.4 mg N m−2d−1over the 49 days of observations in late winter/ early spring. The winter warm spell resulted in an 82 % increase of N leaching after the warm spell (up to 18 mg N l−1). Stronger leaching occurred at the colder site which can be explained by plants becoming photosynthetically active with subsequent frost damaging their above-ground tissue due to missing insulation by snow and/or dehardening, resulting in reduced N uptake. N leaching differed by >600 % among contrasting vegetation composition with almost no leaching from grassland types and strongest leaching from shrubland types that even surpassed leaching from bare ground controls.ConclusionsWinter warm spells can affect the biogeochemistry of temperate ecosystems with plant performance and vegetation composition controlling the amount of N leaching.
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影响因子：
1.1
作者：
Kreyling, Juergen;Henry, Hugh A. L.
通讯作者：
Henry, Hugh A. L.
冬季变暖脉冲对温带石南地和草原群落的植物性能产生不同的影响
影响因子：
2
作者：
Schürings J;Jentsch A;Kreyling J
通讯作者：
Kreyling J
“美国中西部北部农业强度梯度的长期硝酸盐损失”的勘误表 [Agric.Ecosyst.149 (2012) 10-19]
DOI：
10.1016/j.agee.2014.06.023
发表时间：
2014
期刊：
Agriculture, Ecosystems & Environment
影响因子：
--
作者：
S. Syswerda;B. Basso;S. Hamilton;J. B. Tausig;G. Robertson
通讯作者：
G. Robertson
大量沉积和渗透测量表明的矿物元素沉积和冠层浸出的趋势
影响因子：
11.4
作者：
E. Matzner;T. Zuber;C. Alewell;G. Lischeid;K. Moritz
通讯作者：
K. Moritz
影响因子：
6.3
作者：
de Wit, H. A.;Hindar, A.;Hole, L.
通讯作者：
Hole, L.