5 year-long monitoring of Barkley Canyon cold-seeps with the internet operated deep-sea crawler "Wally"
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/99945
Tipus de documentComunicació de congrés
Data publicació2016
EditorSARTI
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
Despite the technological advances of the last decades (e.g. ROVs, AUVs, cabled
observatories), our knowledge of most deep-sea environments is still strongly
limited by spatio-temporal sampling and observational capabilities. The novel
Internet Operated Deep-Sea Crawler technology can provide high-frequency,
multi-sensor data, during long-term deployments, 24/7 communication with
researchers and broader spatial coverage (i.e. mobile platform) than fixed
instrument installations. The crawler “Wally” is deployed at the Barkley Canyon
methane hydrates site (NE Pacific, Canada; ~890 m depth) and connected to the
Ocean Networks Canada NEPTUNE cabled observatory network (ONC; www.
oceannetworks.ca). Here we present the environmental and biological datasets
obtained from Wally instruments and cameras, during the first deployment phase
(September 2010 to January 2015), as well as new features and preliminary
results obtained since it was re-deployed (May 2016 – present). In addition to data
provided by the standard payload of the crawler (i.e. ADCP, CTD, methane sensor,
turbidity sensor and fluorometer), the hydrates community was video-monitored at
different frequencies and timespans. Photomosaics were generated at two distinct
locations, in order to map chemosynthetic bacterial mats and vesicomyid clam
colonies covering the ~2-3 m high hydrate mounds, and document their temporal
dynamics. The crawler followed the development of a deep-sea shell taphonomic
experiment aiming to quantify biogenic carbon fluxes at the hydrates environment.
The composition and diel activity patterns of the hydrates megafaunal community
were studied with the use of linear video-transects conducted from February 2013 to
April 2014. Since the summer of 2016, video-frames recorded at different locations
of the site are analyzed for a biodiversity study and photomosaicing of the hydrate
mounds continues, with 3D modelling of the mound structures also available as a
new feature of the crawler deployed in May 2016. All data are archived in real-time
and can be accessed online on the Ocean Networks Canada database. As deep-sea
crawler technology and similar mobile, benthic platform technologies progress
towards full operational autonomy, they will provide an even greater capacity for
future monitoring and understanding of dynamic, extreme environments such as
methane hydrate fields.
Localització
CitacióChatzievangelou, Damianos [et al.]. 5 year-long monitoring of Barkley Canyon cold-seeps with the internet operated deep-sea crawler "Wally". A: 7th International Workshop on Marine Technology : MARTECH 2016. "Instrumentation viewpoint". Vilanova i la Geltrú: SARTI, 2016, p. 60.
Dipòsit legalB-32814-2006
ISSN1886-4864
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
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ID25.pdf | Abstract | 1,842Mb | Visualitza/Obre |