Soil nitrate reducing processes - drivers, mechanisms for spatial variation, and significance for nitrous oxide production.
Soil nitrate reducing processes - drivers, mechanisms for spatial variation, and significance for nitrous oxide production.
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DOI：
10.3389/fmicb.2012.00407
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发表时间：
2012
影响因子：
5.2
通讯作者：
Daniell TJ
中科院分区：
文献类型：
--
作者：
Giles M;Morley N;Baggs EM;Daniell TJ
微生物反硝化和异化硝酸盐还原成铵（DNRA）是土壤中两种重要的硝酸盐还原机制，是造成土壤中硝酸盐流失和产生温室气体氧化亚氮（N2O）的重要原因。已知许多因素控制这些过程，包括O2浓度和水分含量、N、C、pH以及负责这些过程的硝酸盐还原生物的大小和群落结构。有一个越来越多的了解与许多这些控制通量通过土壤系统中的氮循环。然而，硝酸盐还原社区如何与环境变量和这些过程中的产品通量联系起来仍然存在不确定性。环境控制和微生物群落在小的亚厘米土壤区域的高度空间变异性可能被证明是至关重要的，在确定为什么生物和非生物控制之间的联系的理解已被证明是难以捉摸的。这种空间效应作为硝酸盐还原过程的驱动因素常常被忽视。土壤中硝酸盐还原过程的空间异质性的影响的增加的知识将是了解的驱动程序，位置和潜在的N2O生产从土壤中的基础。
The microbial processes of denitrification and dissimilatory nitrate reduction to ammonium (DNRA) are two important nitrate reducing mechanisms in soil, which are responsible for the loss of nitrate () and production of the potent greenhouse gas, nitrous oxide (N2O). A number of factors are known to control these processes, including O2 concentrations and moisture content, N, C, pH, and the size and community structure of nitrate reducing organisms responsible for the processes. There is an increasing understanding associated with many of these controls on flux through the nitrogen cycle in soil systems. However, there remains uncertainty about how the nitrate reducing communities are linked to environmental variables and the flux of products from these processes. The high spatial variability of environmental controls and microbial communities across small sub centimeter areas of soil may prove to be critical in determining why an understanding of the links between biotic and abiotic controls has proved elusive. This spatial effect is often overlooked as a driver of nitrate reducing processes. An increased knowledge of the effects of spatial heterogeneity in soil on nitrate reduction processes will be fundamental in understanding the drivers, location, and potential for N2O production from soils.
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DOI：
10.1098/rstb.2011.0321
发表时间：
2012-05-05
期刊：
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子：
--
作者：
Bakken LR;Bergaust L;Liu B;Frostegård A
通讯作者：
Frostegård A
影响因子：
5.1
作者：
Attard, E.;Poly, F.;Le Roux, X.
通讯作者：
Le Roux, X.
影响因子：
8.4
作者：
Andersen, K;Kjær, T;Revsbech, NP
通讯作者：
Revsbech, NP
影响因子：
11
作者：
Abell, Guy C. J.;Revill, Andrew T.;Robert, Stanley S.
通讯作者：
Robert, Stanley S.
影响因子：
6.5
作者：
Chenu, C;Hassink, J;Bloem, J
通讯作者：
Bloem, J