Arid
DOI10.1016/j.catena.2011.02.005
Organic carbon enrichment in sediments: Effects of rainfall characteristics under different land uses in a Mediterranean area
Martinez-Mena, M.1; Lopez, J.1; Almagro, M.1; Albaladejo, J.1; Castillo, V.1; Ortiz, R.2; Boix-Fayos, C.1
通讯作者Martinez-Mena, M.
来源期刊CATENA
ISSN0341-8162
出版年2012
卷号94页码:36-42
英文摘要

The results of an experiment to evaluate the effect of rainfall characteristics on organic carbon (OC) losses and on the type of particles mobilised by erosion under natural rainfall and under different land uses (non-disturbed forested area, and a non-irrigated olive cropland) at plot scale are presented. Labile (particulate organic carbon. POC) and stable (mineral associated organic carbon, MOC) carbon pools were measured in soil and sediments. Based on the product of total rainfall and I-30 (mm mmh(-1)), as a measure of rainfall erosivity, events were divided into three classes (from low to high erosivity). A positive correlation between P*I30 and OC concentration (r = 0.54, p < 0.01) and P*I30 and OC enrichment ratios (r = 0.43, p < 0.05) was observed for the forest plot, while no correlation and even a negative trend between both variables were observed in the olive plot. These opposite responses are due to the effect that vegetation cover had on aggregate soil stability and on OC mobilisation and transport through the plot. With high intensity storms the high sediment removal in the olive plot led to subsoil and topsoil becoming mixed reducing the overall nutrient and OC concentration of the eroded sediment. Enrichment ratios of OC (EROC) were higher in the olive than in the forest plot in events of low rainfall erosivity (class 1), which represented almost 50% of the total events occurring in this area, while the differences between plots as regards the total mobilised OC were greater after the high rainfall erosivity events, until up to three times more carbon being mobilised in the olive plot compared with the forest one. POC transport in sediments was higher in the olive plots and was more likely to occur in events of low intensity. MOC was transported in high intensity events: in aggregate form with a greater probability of being sequestered in the sediment (aggregates smaller than 20 mu m) or in particulate form (after the rupture of aggregates) with a greater probability of mineralisation. (C) 2011 Elsevier B.V. All rights reserved.


英文关键词Erosion-induced carbon loss Soil aggregates Organic carbon pools Rainfall erosivity Semi-arid
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000303295100005
WOS关键词SIMULATED RAINFALL ; VARIABLE RAINFALL ; EROSION PROCESSES ; SOIL-EROSION ; CONSERVATION TILLAGE ; NUTRIENT LOSSES ; WATER EROSION ; OVERLAND-FLOW ; RUNOFF ; TRANSPORT
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向Geology ; Agriculture ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/171722
作者单位1.Univ Murcia, CSIC, CEBAS, Soil & Water Conservat Dept, E-30100 Murcia, Spain;
2.Univ Murcia, Dept Agr Chem Geol & Soil Sci, E-30100 Murcia, Spain
推荐引用方式
GB/T 7714
Martinez-Mena, M.,Lopez, J.,Almagro, M.,et al. Organic carbon enrichment in sediments: Effects of rainfall characteristics under different land uses in a Mediterranean area[J],2012,94:36-42.
APA Martinez-Mena, M..,Lopez, J..,Almagro, M..,Albaladejo, J..,Castillo, V..,...&Boix-Fayos, C..(2012).Organic carbon enrichment in sediments: Effects of rainfall characteristics under different land uses in a Mediterranean area.CATENA,94,36-42.
MLA Martinez-Mena, M.,et al."Organic carbon enrichment in sediments: Effects of rainfall characteristics under different land uses in a Mediterranean area".CATENA 94(2012):36-42.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Martinez-Mena, M.]的文章
[Lopez, J.]的文章
[Almagro, M.]的文章
百度学术
百度学术中相似的文章
[Martinez-Mena, M.]的文章
[Lopez, J.]的文章
[Almagro, M.]的文章
必应学术
必应学术中相似的文章
[Martinez-Mena, M.]的文章
[Lopez, J.]的文章
[Almagro, M.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。