globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13430
论文题名:
A meta-analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems
作者: Zhou M.; Butterbach-Bahl K.; Vereecken H.; Brüggemann N.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:3
起始页码: 1338
结束页码: 1352
语种: 英语
英文关键词: costal ecosystem ; denitrification ; dissimilatory nitrate reduction to ammonium (DNRA) ; nitrogen cycle ; salinity intrusion ; sea-level rise ; soil salinization
英文摘要: Salinity intrusion caused by land subsidence resulting from increasing groundwater abstraction, decreasing river sediment loads and increasing sea level because of climate change has caused widespread soil salinization in coastal ecosystems. Soil salinization may greatly alter nitrogen (N) cycling in coastal ecosystems. However, a comprehensive understanding of the effects of soil salinization on ecosystem N pools, cycling processes and fluxes is not available for coastal ecosystems. Therefore, we compiled data from 551 observations from 21 peer-reviewed papers and conducted a meta-analysis of experimental soil salinization effects on 19 variables related to N pools, cycling processes and fluxes in coastal ecosystems. Our results showed that the effects of soil salinization varied across different ecosystem types and salinity levels. Soil salinization increased plant N content (18%), soil NH4 + (12%) and soil total N (210%), although it decreased soil NO3 − (2%) and soil microbial biomass N (74%). Increasing soil salinity stimulated soil N2O fluxes as well as hydrological NH4 + and NO2 − fluxes more than threefold, although it decreased the hydrological dissolved organic nitrogen (DON) flux (59%). Soil salinization also increased the net N mineralization by 70%, although salinization effects were not observed on the net nitrification, denitrification and dissimilatory nitrate reduction to ammonium in this meta-analysis. Overall, this meta-analysis improves our understanding of the responses of ecosystem N cycling to soil salinization, identifies knowledge gaps and highlights the urgent need for studies on the effects of soil salinization on coastal agro-ecosystem and microbial N immobilization. Additional increases in knowledge are critical for designing sustainable adaptation measures to the predicted intrusion of salinity intrusion so that the productivity of coastal agro-ecosystems can be maintained or improved and the N losses and pollution of the natural environment can be minimized. © 2016 John Wiley & Sons Ltd
资助项目: We thank the anonymous reviewers for their very constructive comments on previous versions of this manuscript. This study was supported by the German BMBF project ‘DeltAdapt’ (Sustainable adaptation of coastal agro-ecosystems to increased salinity intrusion, grant no. 031A287C), the National Natural Science Foundation of China (grant no. 41573079) and the Opening Fund of the State Key Laboratory of Environmental Geochemistry (SKLEG2016909).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61032
Appears in Collections:影响、适应和脆弱性

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作者单位: Institute of Bio- and Geosciences-Agrosphere (IBG-3), Forschungszentrum Jülich GmbH, Jülich, Germany; Institute of Meteorology and Climate Research – Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany; International Livestock Research Institute (ILRI), Old Naivasha Road, Nairobi, Kenya

Recommended Citation:
Zhou M.,Butterbach-Bahl K.,Vereecken H.,et al. A meta-analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems[J]. Global Change Biology,2017-01-01,23(3)
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