globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2018.04.042
Scopus记录号: 2-s2.0-85046136586
论文题名:
Bulk deposition of base cationic nutrients in China's forests: Annual rates and spatial characteristics
作者: Du E; , de Vries W; , McNulty S; , Fenn M; E
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 184
起始页码: 121
结束页码: 128
语种: 英语
英文关键词: Acid deposition ; Base cation ; Bulk deposition ; Forest ecosystem ; Nutrient cycling
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: Base cations, such as potassium (K+), calcium (Ca2+) and magnesium (Mg2+), are essential nutrients for plant growth and their atmospheric inputs can buffer the effect of acid deposition by nitrogen (N) and sulphur (S) compounds. However, the spatial variation in atmospheric deposition of these base cationic nutrients is less understood compared with N and S deposition. By synthesizing bulk deposition data for K+, Ca2+ and Mg2+, we assessed their annual rates and spatial characteristics at 34 forested sites across China. Our synthesis showed relatively high levels of bulk deposition of base cationic nutrients in China's forests, being an order of magnitude higher than in the USA and Europe. On average, K+, Ca2+ and Mg2+ accounted for 13%, 72% and 15% of the bulk deposition of base cationic nutrients, respectively. Surprisingly, base cation deposition was lower at sites near semi-arid regions compared with sites in eastern and southern China, which were far from semi-arid regions. Moreover, elevated base cation deposition was associated with urban hotspots, exhibiting a significant power-law increase with closer distance to the nearest large cities. We estimated that on average base cationic nutrients neutralized a significant proportion (76%) of the potential acid load due to acid deposition. Our findings suggest that in China there is considerable anthropogenic alteration of the regional cycling of base cationic nutrients, which plays an important role in counteracting the risk of soil acidification and base cation depletion in forest ecosystems, especially in the southern regions. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82831
Appears in Collections:气候变化事实与影响

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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing, China; School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing, China; Environmental Systems Analysis Group, Wageningen University, PO Box 47, Wageningen, AA, Netherlands; Alterra, Wageningen University and Research Center, PO Box 47, Wageningen, AA, Netherlands; Southern Research Station, USDA Forest Service, Raleigh, NC, United States; Pacific Southwest Research Station, USDA Forest Service, Riverside, CA, United States

Recommended Citation:
Du E,, de Vries W,, McNulty S,et al. Bulk deposition of base cationic nutrients in China's forests: Annual rates and spatial characteristics[J]. Atmospheric Environment,2018-01-01,184
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