A meta-analysis on the response of microbial biomass, dissolved organic matter, respiration, and N mineralization in mineral soil to fire in forest ecosystems
A meta-analysis on the response of microbial biomass, dissolved organic matter, respiration, and N mineralization in mineral soil to fire in forest ecosystems
复制标题
森林生态系统中矿质土壤微生物量、溶解有机物、呼吸和氮矿化对火灾响应的荟萃分析
DOI：
10.1016/j.foreco.2012.02.006
复制
发表时间：
2012-05-01
影响因子：
3.7
通讯作者：
Wang, Silong
中科院分区：
文献类型：
--
作者：
Wang, Qingkui;Zhong, Micai;Wang, Silong
火灾对森林生态系统中不稳定土壤碳（C）和氮（N）的影响对于理解碳固存和氮循环非常重要，这不仅是因为不稳定土壤碳和氮通常是决定土壤肥力的变量，还因为土壤作为碳源或碳汇的作用在生态系统和区域层面都很重要。在当前的研究中，对有关火灾对矿质土壤中土壤有机碳、总氮、微生物生物量碳和氮、溶解性有机碳和总氮、呼吸作用以及氮矿化影响的文献进行了综述，并报告了对文献数据进行荟萃分析的结果。总体而言，火灾显著增加了土壤总氮、微生物生物量氮、溶解性有机碳和总氮，但降低了土壤有机碳、微生物生物量碳、呼吸作用和氮矿化。在不同火灾类型的显著影响中，野火对土壤有机碳、总氮、微生物生物量碳和氮、溶解性总氮以及土壤呼吸的影响比计划用火更大。此外，土壤有机碳、总氮和氮矿化对野火的响应取决于森林类型和自然区域。在阔叶林和地中海区域发现土壤有机碳、总氮呈正响应，而在针叶林和温带区域呈负响应。野火显著降低了针叶林的氮矿化。火灾对土壤微生物生物量碳和氮、溶解性有机碳以及氮矿化的影响通常随着火灾发生后的时间推移而降低。一般来说，火灾对土壤有机碳、微生物生物量碳以及溶解性总氮和氮矿化的影响随着土壤深度的增加而降低。这些结果表明，火灾增加了碳和氮的有效性并提高了微生物活性，从而降低了碳固存的潜在速率。（C）2012爱思唯尔有限公司。保留所有权利。
The effects of fire on labile soil C and N in forest ecosystems are important for understanding C sequestration and N cycling not only because labile soil C and N are often variables that determine soil fertility but also because the role of soils as a source or sink for C is important on an ecosystem and on the regional level. In the current study, the literature on the effects of fire on soil organic C, total N, microbial biomass C and N, dissolved organic C, and total N, respiration, and N mineralization in mineral soil was reviewed, and the results of a meta-analysis on literature data were reported. Overall, fire significantly increased the soil total N, microbial biomass N. dissolved organic C, and total N, but decreased soil organic C, microbial biomass C, respiration and N mineralization. Among the significant effects of different fire types, wildfire had the higher effects on the soil organic C, total N, microbial biomass C and N, dissolved total N and respiration of soil than prescribed fire. In addition, responses of soil organic C. total N and N mineralization to wildfire depended on forest type and natural zone. Positive responses of soil organic C, total N were found in broadleaved forests and Mediterranean zones, and negative responses in coniferous forests and temperate zones. Wildfire significantly decreased N mineralization in coniferous forests. The effects of fire on soil microbial biomass C and N, dissolved organic C and N mineralization generally decreased with time after the fire. In general, the effects of fire on soil organic C, microbial biomass C, and dissolved total N and N mineralization decreased with increasing soil depth. These results suggest that fire increases C and N availability and increases microbial activity, which consequently decreases the potential rates of C sequestration. (C) 2012 Elsevier B.V. All rights reserved.