Consulta: creatorFacets:"Poitevin, Pierre"
Registros recuperados: 8
Data/hora: 18/06/2024 09:27:33

Suivi des espèces envahissantes marines à Saint-Pierre et Miquelon. Année 2013
Provedor de dados: 5
Autores: Sellier, Marion; Poitevin, Pierre; Goraguer, Herle; Faure, Jean-marie; Goulletquer, Philippe.
This work, conducted in 2013 , is a first monitoring of marine invasive species in Saint-Pierre and Miquelon archipelago. In global changing context on coastal ecosystems , accentuated by direct or indirect effects of human activities, it became essential to implement a survey on marine invasive species on Saint-Pierre and Miquelon shoreline. Fukui traps and tunicates collectors implemented on different stations as well as the timely completion of observational dives , have established the following conclusions : several non native species were detected within the local marine ecosystem. This species , such as Carcinus maenas , Ciona intestinalis , Botryllus schlosseri , Caprella mutica , etc. ... threaten some local marine ecosystems and some local...
Tipo: Text
Palavras-chave: Espèces marines invasives; Saint-Pierre et Miquelon; Aquaculture; Écosystème; Marine invasive species; Saint-Pierre and Miquelon; Aquaculture; Ecosystem.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00175/28635/27118.pdf

Does trace element composition of bivalve shells record utra-high frequency environmental variations?
Provedor de dados: 5
Autores: Poitevin, Pierre; Chauvaud, Laurent; Pecheyran, Christophe; Lazure, Pascal; Jolivet, Aurélie; Thebault, Julien.
Saint-Pierre and Miquelon (SPM) is a small archipelago where instrumental measures based on water column velocity and temperature profiles compiled comprehensive evidence for strong near-diurnal (25.8h) current and bottom temperature oscillations (up to 11.5 °C) which is possibly the largest ever observed — at any frequency — on a stratified mid-latitude continental shelf. The main objective of our study was to identify if Placopecten magellanicus can record on its shell these high frequency environmental variations. To this end, we have tried to identify proxies for water temperature and food availability through development of a new ultra-high resolution LA-ICPMS analyses method capable of resolving shell surface elemental composition with a 10 μm...
Tipo: Text
Palavras-chave: Ultra-high resolution LA-ICPMS; Placopecten magellanicus; Shell chemistry; Trace elements; Environmental change; Bivalve; Environmental proxies; North Atlantic; Saint-Pierre and Miquelon; Coastal trapped wave.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72400/71345.pdf

Dynamique de renouvellement des masses d'eaux du Grand Etang de Saint Pierre et Miquelon : rapport préliminaire
Provedor de dados: 5
Autores: Le Moine, Olivier; Geairon, Philippe; Goraguer, Herle; Poitevin, Pierre; Robert, Stephane; Goulletquer, Philippe.
In 2013, the project ‘Assessment of the renewable rate of the seawater masses in the Miquelon ‘Grand Etang’ ‘ focused essentially on (1) building a data set originating from all partners (e.g., DTAM, IGN), (2) preliminary sampling of current patterns so as to facilitate the 2014 field sampling strategy. Besides this approach, a census of aerial pictures dated from 1950, 1990 and 2005 were studied to assess the temporal trends of this geographic sector. The field work to be carried out in 2014 are: 1) Bathymetry: data acquisition in the ‘Grand Etang’ in the area presently used for mussel long lines culture to obtain a comprehensive data set, transversal profiles at the strait level at the near vicinity of the current pattern measuring station. 2) Current...
Tipo: Text
Palavras-chave: Courantométrie; Bathymétrie; Saint Pierre &amp; Miquelon; Current meters; Bathymetry; Saint Pierre &amp; Miquelon.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00175/28581/26975.pdf

Assessment of Ba/Ca in Arctica islandica shells as a proxy for phytoplankton dynamics in the Northwestern Atlantic Ocean
Provedor de dados: 5
Autores: Doré, Justine; Chaillou, Gwénaelle; Poitevin, Pierre; Lazure, Pascal; Poirier, André; Chauvaud, Laurent; Archambault, Philippe; Thébault, Julien.
Despite its major role as a global climate regulator, little is known about the recent evolution of the North Atlantic Ocean, especially prior to the fifties, principally because of the lack of long-term instrumental data. Moreover, the North Atlantic Ocean is undergoing rapid changes at the physical scale leading to modifications at the biological scale increasing interest to monitor the environment. The phytoplankton is the base of the ocean life and its perturbation can lead to further changes in the food chain. Recording its dynamics implies to observe both its spatial and temporal variations. This study brings forward the use of the Ba/Ca ratio from shells of the long-living bivalve Arctica islandica collected in the Northwestern Atlantic Ocean near...
Tipo: Text
Palavras-chave: A. islandica; Ba/Ca; Master chronology; Cross-dating; Chlorophyll a; Northwestern Atlantic.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71881/70576.pdf

Ligament, hinge, and shell cross-sections of the Atlantic surfclam (Spisula solidissima): Promising marine environmental archives in NE North America
Provedor de dados: 5
Autores: Poitevin, Pierre; Thebault, Julien; Schoene, Bernd R.; Jolivet, Aurelie; Lazure, Pascal; Chauvaud, Laurent.
The Atlantic surfclam (Spisula solidissima) is a commercially important species in North American waters, undergoing biological and ecological shifts. These are attributed, in part, to environmental modifications in its habitat and driven by climate change. Investigation of shell growth patterns, trace elements, and isotopic compositions require an examination of growth lines and increments preserved in biogenic carbonates. However, growth pattern analysis of S. solidissima is challenging due to multiple disturbance lines caused by environmental stress, erosion in umbonal shell regions, and constraints related to sample size and preparation techniques. The present study proposes an alternative method for describing chronology. First, we analyzed growth...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00444/55597/57229.pdf

Suivi des espèces envahissantes marines à Saint Pierre et Miquelon. Année 2014
Provedor de dados: 5
Autores: Sellier, Marion; Poitevin, Pierre; Goraguer, Herle; Faure, Jean-marie; Goulletquer, Philippe.
Initiated in 2013, the present work carried out in 2014 extends the monitoring network focusing on marine invasive exotic species in Saint-Pierre and Miquelon archipelago. In a global context of coastal ecosystems’ changes, accentuated by direct or indirect effects of human activities, it became essential to implement a monitoring survey and to track the expansion of marine invasive species along Saint-Pierre and Miquelon shoreline. Fukui traps and tunicates collectors deployed on different stations as well as the timely completion of observational dives, have provided the following conclusions: several invasive species were again reported within the local marine ecosystem. Those species, i.e., Carcinus maenas, Caprella mutica, Ciona intestinalis,...
Tipo: Text
Palavras-chave: Marine Invasive species; Saint-Pierre and Miquelon; Aquaculture; Ecosystem; Espèces marines invasives; Saint-Pierre et Miquelon; Aquaculure; Ecosystème.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00312/42303/41635.pdf

Growth Response of Arctica Islandica to North Atlantic Oceanographic Conditions Since 1850
Provedor de dados: 5
Autores: Poitevin, Pierre; Thébault, Julien; Siebert, Valentin; Donnet, Sébastien; Archambault, Philippe; Doré, Justine; Chauvaud, Laurent; Lazure, Pascal.
The Northwest Atlantic is a key region with an essential role in global climate regulation, redistributing heat and influencing the carbon cycle. However, little is known about its evolution before 1950, mainly because of the lack of long-term instrumental measurements. The hard parts of long-lived marine biota hold the potential to extend instrumentally derived observation by several decades or centuries and enhance our understanding of global climate processes. Here, we investigate the effects of local, regional, and large-scale climate variability on the marine bivalve, Arctica islandica (Linnaeus, 1767) from Saint-Pierre and Miquelon (SPM). This archipelago lies at the boundary zone between the cold Labrador Current in the north and the warm Gulf...
Tipo: Text
Palavras-chave: Arctica islandica; Paleoecology; North Atlantic; Sub polar gyre; Labrador current; Bivalve; Sclerochronology; Climate change.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62050/66198.pdf

Haliotis tuberculata   , a generalist marine herbivore that prefers a mixed diet, but with consistent individual foraging activity
Provedor de dados: 5
Autores: Roussel, Sabine; Poitevin, Pierre; Day, Robert; Le Grand, Fabienne; Stiger‐pouvreau, Valérie; Leblanc, Catherine; Huchette, Sylvain.
While population foraging behaviour of herbivores has been extensively studied, individual choice is still poorly understood. Very few studies have focused on the individual consistency of foraging behaviour in marine herbivores. Because marine ectotherms are strongly influenced by their environment and because a mixed diet is appropriate for herbivores, we hypothesized that Haliotis tuberculata, a large marine gastropod, would not exhibit significant individual consistency in foraging activity and would display generalist food choices. To test these hypotheses, the behaviour of 120 abalone was studied using a choice test of eight macroalgal species over 3 weeks, with video recording 24 hr a day. In addition, primary components, secondary metabolites and...
Tipo: Text
Palavras-chave: Food choice; Foraging activity; Individual consistency; Intraclass correlation; Marine herbivore; Mollusc; Proportion similarity index.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00613/72465/71613.pdf