Increasing sediment accumulation rates in La Fonera ( Palamós ) submarine canyon axis and their relationship with bottom trawling activities

Content Provider	Semantic Scholar
Author	Puig, Pere Martin, Jake Masqué, Pere Palanques, Albert
Copyright Year	2018
Abstract	Previous studies conducted in La Fonera (Palamós) submarine canyon (NW Mediterranean) found that trawling activities along the canyon flanks cause resuspension and transport of sediments toward the canyon axis. Pb chronology supported by Cs dating applied to a sediment core collected at 1750m 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.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://ro.ecu.edu.au/cgi/viewcontent.cgi?article=2126&context=ecuworkspost2013&httpsredir=1&referer=
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article