Arid
DOI10.1371/journal.pone.0211325
Coupled influence of precipitation and vegetation on millennial-scale erosion rates derived from Be-10
Mishra, Ashish Kumar1,2; Placzek, Christa1,2; Jones, Rhondda3
通讯作者Mishra, Ashish Kumar
来源期刊PLOS ONE
ISSN1932-6203
出版年2019
卷号14期号:1
英文摘要Water is one of the main agent of erosion in many environmental settings, but erosion rates derived from beryllium-10 (Be-10) suggests that a relationship between precipitation and erosion rate is statistically non-significant on a global scale. This might be because of the strong influence of other variables on erosion rate. In this global Be-10 compilation, we examine if mean annual precipitation has a statistically significant secondary control on erosion rate. Our secondary variable assessment suggests a significant secondary influence of precipitation on erosion rate. This is the first time that the influence of precipitation on Be-10-derived erosion rate is recognized on global scale. In fact, in areas where slope is <200m/km (similar to 11 degrees), precipitation influences erosion rate as much as mean basin slope, which has been recognized as the most important variable in previous Be-10 compilations. In areas where elevation is <1000m and slope is <11 degrees, the correlation between precipitation and erosion rate improves considerably. These results also suggest that erosion rate responds to change in mean annual precipitation nonlinearly and in three regimes: 1) it increases with an increase in precipitation until similar to 1000 mm/yr; 2) erosion rate stabilizes at similar to 1000 mm/yr and decreases slightly with increased precipitation until similar to 2200 mm/yr; and 3) it increases again with further increases in precipitation. This complex relationship between erosion rate and mean annual precipitation is best explained by the interrelationship between mean annual precipitation and vegetation. Increased vegetation, particularly the presence of trees, is widely recognized to lower erosion rate. Our results suggest that tree cover of 40% or more reduces erosion rate enough to outweigh the direct erosive effects of increased rainfall. Thus, precipitation emerges as a stronger secondary control on erosion rate in hyper-arid areas, as well as in hyper-wet areas. In contrast, the regime between similar to 1000 and similar to 2200 mm/yr is dominated by opposing relationships where higher rainfall acts to increase erosion rate, but more water also increases vegetation/tree cover, which slows erosion. These results suggest that when interpreting the sedimentological record, high sediment fluxes are expected to occur when forests transition to grasslands/savannahs; however, aridification of grasslands or savannahs into deserts will result in lower sediment fluxes. This study also implies that anthropogenic deforestation, particularly in regions with high rainfall, can greatly increase erosion.
类型Article
语种英语
国家Australia
开放获取类型Green Published, gold, Green Accepted
收录类别SCI-E
WOS记录号WOS:000457037500149
WOS关键词WEAK CLIMATIC CONTROL ; SITU-PRODUCED BE-10 ; DENUDATION RATES ; SOIL-EROSION ; COSMOGENIC NUCLIDES ; SEDIMENT TRANSPORT ; PLATEAU UPLIFT ; SOUTHERN ASIA ; ROCK UPLIFT ; HALF-LIFE
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/218077
作者单位1.James Cook Univ, Geosci, Coll Sci & Engn, Townsville, Qld, Australia;
2.James Cook Univ, Ctr Trop Environm & Sustainabil Sci TESS, Townsville, Qld, Australia;
3.James Cook Univ, StatsHelp Serv, Grad Res Sch, Townsville, Qld, Australia
推荐引用方式
GB/T 7714
Mishra, Ashish Kumar,Placzek, Christa,Jones, Rhondda. Coupled influence of precipitation and vegetation on millennial-scale erosion rates derived from Be-10[J],2019,14(1).
APA Mishra, Ashish Kumar,Placzek, Christa,&Jones, Rhondda.(2019).Coupled influence of precipitation and vegetation on millennial-scale erosion rates derived from Be-10.PLOS ONE,14(1).
MLA Mishra, Ashish Kumar,et al."Coupled influence of precipitation and vegetation on millennial-scale erosion rates derived from Be-10".PLOS ONE 14.1(2019).
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
[Mishra, Ashish Kumar]的文章
[Placzek, Christa]的文章
[Jones, Rhondda]的文章
百度学术
百度学术中相似的文章
[Mishra, Ashish Kumar]的文章
[Placzek, Christa]的文章
[Jones, Rhondda]的文章
必应学术
必应学术中相似的文章
[Mishra, Ashish Kumar]的文章
[Placzek, Christa]的文章
[Jones, Rhondda]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。