DOI: 10.1002/2015GL065052
论文题名: Increasing sediment accumulation rates in la Fonera (Palamõs) submarine canyon axis and their relationship with bottom trawling activities
作者: Puig P. ; Martín J. ; Masqué P. ; Palanques A.
刊名: Geophysical Research Letters
ISSN: 0094-8545
EISSN: 1944-8276
出版年: 2015
卷: 42, 期: 19 起始页码: 8106
结束页码: 8113
语种: 英语
英文关键词: anthropogenic impacts
; bottom trawling
; continental margins
; sediment accumulation rates
; submarine canyon
Scopus关键词: Budget control
; Fisheries
; Lead
; Submarines
; Anthropogenic impacts
; Bottom trawling
; Continental margin
; Sediment accumulation
; Submarine canyon
; Sediments
; accumulation rate
; anthropogenic effect
; bottom trawling
; cesium isotope
; continental margin
; depocenter
; geoaccumulation
; lead isotope
; resuspension
; sediment core
; sediment transport
; submarine canyon
; Mediterranean Sea
; Mediterranean Sea (Northwest)
; Palamos Canyon
英文摘要: Previous studies conducted in La Fonera (Palamõs) submarine canyon (NW Mediterranean) found that trawling activities along the canyon flanks cause resuspension and transport of sediments toward the canyon axis. 210Pb chronology supported by 137Cs dating applied to a sediment core collected at 1750 m in 2002 suggested a doubling of the sediment accumulation rate since the 1970s, coincident with the rapid industrialization of the local trawling fleet. The same canyon area has been revisited a decade later, and new data are consistent with a sedimentary regime shift during the 1970s and also suggest that the accumulation rate during the last decade could be greater than expected, approaching ~2.4 cm yr-1 (compared to ~0.25 cm yr-1 pre-1970s). These results support the hypothesis that commercial bottom trawling can substantially affect sediment dynamics and budgets on continental margins, eventually initiating the formation of anthropogenic depocenters in submarine canyon environments. Key Points Sediment accumulation rates on continental margins can be altered by trawling activities Submarine canyons can host anthropogenic sedimentary depocenters along their axes © 2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84947034214&doi=10.1002%2f2015GL065052&partnerID=40&md5=f23787898c575af11e5623116b3d6336
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8161
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Institut de Ciències Del Mar (CSIC), Barcelona, Spain
Recommended Citation:
Puig P.,Martín J.,Masqué P.,et al. Increasing sediment accumulation rates in la Fonera (Palamõs) submarine canyon axis and their relationship with bottom trawling activities[J]. Geophysical Research Letters,2015-01-01,42(19).