Consulta: subjectFacets:"Deep-sea observatory"
Registros recuperados: 6
Data/hora: 26/07/2024 22:51:41

Annual and seasonal dynamics of deep-sea megafaunal epibenthic communities in Barkley Canyon (British Columbia, Canada): a response to climatology, surface productivity and benthic boundary layer variation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chauvet, Pauline; Metaxas, Anna; Hay, Alex E.; Matabos, Marjolaine.
Understanding the impact of the environment on temporal trends in the composition and abundance of deep-sea species is essential for forecasting evolution of the community in the context of climate change. The recent development of deep-sea observatories enables multidisciplinary studies of long duration and high temporal resolution. We used a platform at the Ocean Networks Canada NEPTUNE Observatory located in the axis of Barkley Canyon between June 2012 and January 2015 to: (1) characterize the megabenthic community and the environmental conditions in the canyon; (2) investigate temporal patterns in the faunal community; and (3) determine the influence of environmental conditions on the observed patterns. The megafaunal epibenthic community, which...
Tipo: Text
Palavras-chave: Deep-sea observatory; Inter-annual variation; Seasonal variation; Deep-sea canyon; Zoobenthos; Oxygen minimum zone; Canada; British Columbia; Barkley Canyon.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00436/54715/56152.pdf

Astronomical and atmospheric impacts on deep-sea hydrothermal vent invertebrates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lelievre, Yann; Legendre, Pierre; Matabos, Marjolaine; Mihaly, Steve; Lee, Raymond W.; Sarradin, Pierre-marie; Arango, Claudia P.; Sarrazin, Jozee.
Ocean tides and winter surface storms are among the main factors driving the dynamics and spatial structure of marine coastal species, but the understanding of their impact on deep-sea and hydrothermal vent communities is still limited. Multidisciplinary deep-sea observatories offer an essential tool to study behavioural rhythms and interactions between hydrothermal community dynamics and environmental fluctuations. Here, we investigated whether species associated with a Ridgeia piscesae tubeworm vent assemblage respond to local ocean dynamics. By tracking variations in vent macrofaunal abundance at different temporal scales, we provide the first evidence that tides and winter surface storms influence the distribution patterns of mobile and non-symbiotic...
Tipo: Text
Palavras-chave: Deep-sea observatory; Hydrothermal vents; Macrofaunal abundance; Surface storms; Ocean tides; Time-series analysis.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00380/49122/49554.pdf

Behavioural study of two Hydrothermal crustacean decapods: Mirocaris fortunata and Segonzacia mesatlantica, from the lucky strike vent field (mid-Atlantic ridge)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Matabos, Marjolaine; Cuvelier, D.; Brouard, J.; Shillito, B.; Ravaux, J.; Zbinden, M.; Barthelemy, D.; Sarradin, Pierre-marie; Sarrazin, Jozee.
Identifying the factors driving community dynamics in hydrothermal vent communities, and in particular biological interactions, is challenged by our ability to make direct observations and the difficulty to conduct experiments in those remote ecosystems. As a result, we have very limited knowledge on species’ behaviour and interactions in these communities and how they in turn influence community dynamics. Interactions such as competition or predation significantly affect community structure in vent communities, and video time-series have successfully been used to gain insights in biological interactions and species behaviour, including responses to short-term changes in temperature or feeding strategies. In this study, we combined in situ and ex situ...
Tipo: Text
Palavras-chave: Abyss Box; Biological interactions; Deep-sea observatory; Eiffel Tower edifice; Feeding behaviour; Experimental research; Video imagery; Time series; Lucky Strike; Mid-Atlantic Ridge; 37 degrees 17 ' N; 32 degrees 16.3 ' W.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00266/37714/35732.pdf

High-resolution dynamics of a deep-sea Hydrothermal mussel assemblage monitored by the EMSO-Açores MoMAR observatory
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Sarrazin, Jozee; Cuvelier, Daphne; Peton, Loic; Legendre, P.; Sarradin, Pierre-marie.
Although the spatial distribution of hydrothermal vent assemblages in relation to environmental conditions has been assessed in several studies, there is little documented data on the temporal variation of the fauna and corresponding abiotic factors in a vent community. Here, we present one of the longest integrated (faunal and environmental data) time series ever obtained in a hydrothermal ecosystem. The data were acquired using the TEMPO ecological module that was deployed between 2006 and 2008 on the Mid-Atlantic Ridge, providing the first insights into the day-to-day variations in a Bathymodiolus azoricus mussel assemblage from the Lucky Strike vent field for the 48 days during which the video camera operated. The time-series yielded additional...
Tipo: Text
Palavras-chave: Hydrothermal vents; Faunal dynamics; Mid-Atlantic Ridge; Deep-sea observatory; Bathymodiolus azoricus mussel assemblages; Sulphide edifices; Environmental conditions.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00189/30023/28508.pdf

Interannual Variation in the Population Dynamics of Juveniles of the Deep-Sea Crab Chionoecetes tanneri
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chauvet, Pauline; Metaxas, Anna; Matabos, Marjolaine.
Understanding the population dynamics of commercially fished deep-sea species, on seasonal to inter-annual scales, is of great importance in areas where fishing pressure is high. The remoteness of the deep-sea environment constitutes a challenge for monitoring these populations. The few studies that have investigated population structure of deep-sea species, have used trawls, a destructive approach for benthic ecosystems. The development of deep-sea observatories offers a continuous long-term presence on the seafloor. Using imagery from the Ocean Network Canada deep-sea observatory, video footage was acquired on a daily basis and analyzed to describe the population dynamics of the deep-sea crab Chionoecetes tanneri located in depths of 900–1000 m in...
Tipo: Text
Palavras-chave: Marine imagery; Deep-sea observatory; Ocean Network Canada; Oxygen minimum zone; Tanner crab; Reproduction; Temporal trends; British Columbia.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00481/59314/62069.pdf

Long-Term In Situ Survey of Reactive Iron Concentrations at the EMSO-Azores Observatory
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Laes-huon, Agathe; Cathalot, Cecile; Legrand, Julien; Tanguy, Virginie; Sarradin, Pierre-marie.
A study of the temporal dynamics of iron concentrations and temperature on a faunal assemblage at the Lucky Strike vent was performed using the Tempo ecological module at the EMSO-Azores deep-sea observatory. The CHEMINI in situ analyzer was implemented on this structure to determine reactive iron concentrations in unfiltered seawater samples along with a temperature probe. Stability tests were performed on the CHEMINI analyzer before deployment (optical module, hyperbaric tests, and deep-sea calibration) for long-term in situ analysis of reactive iron (six months, 2013–2014) at the Tour Eiffel active edifice. Recorded daily, the in situ standard (25 \mu mol.L {}^{-1} ) showed excellent reproducibility (1.07%, n=522 ), confirming satisfactory analytical...
Tipo: Text
Palavras-chave: Deep-sea observatory; Hydrothermal vent; In situ chemical analyzer; Iron; Monitoring the Mid-Atlantic Ridge (MoMAR).
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00342/45275/46432.pdf