IPEV Home

French Polar Institute Literature Database

Home |  Show All |  Simple Search |  Advanced Search
Quick Search:
71–80 of 220 records found matching your query (RSS | history):
Select All    Deselect All << 1 2 3 4 5 6 7 8 9 10 >> [11–20]
List View
 | 
Citations
 | 
Details
   print
  Records Links
Author Mazé C., Tixier P., Boulinier T., Gamble A., Guinet C., Robin J.-p. Et J. Labonne doi  openurl
  Title La transformation vers la soutenabilité, de la théorie à la pratique : la ZATA, un modèle d'étude et d'action pertinent et efficace. Le cas des pêcheries et de la conservation des oiseaux et mammifères marins Type Peer-reviewed symposium
  Year 2020 Publication 5ème colloque des zones ateliers-cnrs 2000-2020, 20 ans de recherche du réseau des zones ateliers. blois, france, 4-5 novembre 2020. oral. actes du colloque. Abbreviated Journal  
  Volume Issue (up) Pages  
  Keywords  
  Abstract L'horizon de transformation vers la soutenabilité fondée sur le concept de résilience en écologie est décrit de manière normative dans la littérature en sciences de l'environnement ou mis en valeur à partir de cas d'étude isolés. S'ils constituent d'importantes « semences pour un bon Anthropocène » ces exemples restent encore trop rares, alors que la transformation devrait d'être entreprise à plus grande échelle et à vitesse rapide. Cette transformation nécessite urgemment d'être mise en pratique de manière plus systématique et étayée à partir de cas d'action-recherche efficaces. Pour ce faire, ceux-ci doivent être conçus et mis en œuvre grâce à de nouvelles configurations, représentations et pratiques des relations entre chercheurs et autres acteurs du territoire, publics comme privés. Autrement dit, la transformation implique un changement de gouvernance, pour aller vers une gestion adaptative des territoires, des ressources naturelles et des sociétés qui en dépendent. Elle doit faire une plus grande place aux interactions entre humains et non-humains, redéfinir en profondeur le rapport homme / nature et passer par un rééquilibrage des pouvoirs entre groupes d'acteurs et institutions, dans le processus de décision en matière de gestion environnementale. Les sciences sociales et en particulier l'anthropologie des relations homme / milieu, la sociologie politique des sciences, la sociologie politique et l'économie écologique doivent être mobilisées à cette fin, en étroite interaction avec l'écologie. Les zones-ateliers fournissent à ce titre des cas privilégiés, permettant d'opérer ce changement de paradigme, en donnant une plus grande place à l'action collective, à l'hybridation des savoirs et à l'articulation équilibrée entre intérêts divergents. Elles permettent d'identifier les paramètres déterminants pour générer de manière efficace la transformation. La ZATA, zone atelier Antarctique et Terres Australes, malgré une pression anthropique directe limitée, offre un cadre de travail privilégié pour identifier les paramètres nécessaires à la mise en œuvre d'une gouvernance propice à une gestion adaptative permettant d'augmenter la résilience des SES. La pression du changement global y est très forte, tout comme les interactions entre les diverses catégories d'acteurs et d'institutions historiquement situées. La présence des scientifiques y est très installée et mêlée à des enjeux politiques, économiques et géostratégiques auxquels contribuent la conservation de la biodiversité. A partir de deux modèles d'étude (pêcheries à Kerguelen et interactions avec la mégafaune marine/ conservation des oiseaux marins, pathogènes et dératisation à Amsterdam) faisant intervenir des chercheurs, des décideurs, des gestionnaires et les acteurs économiques dans le processus de décision multi-échelles (e.g. État français / CCAMLAR-RCTA) en termes de gestion environnementale, nous présenterons une méthode de modélisation des socio-écosystèmes en systèmes dynamiques. Les modèles produits permettent d'envisager leurs trajectoires de résilience en fonction des choix de gestion et peuvent ainsi servir d'outil d'aide à la décision et d'instrument inédit en matière de construction des mesures de gestion adaptative. Cette communication, élaborée au fil des interactions avec les gestionnaires, alliera ainsi réflexion théorique et retours sur des cas concrets pouvant permettre une montée en généralité utile pour aller vers une gouvernance des SES effective et efficace en termes de résilience et de soutenabilité.  
  Programme 119  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8096  
Permanent link to this record
 
 
Author A. Wargnier openurl 
  Title Characterising the time profiles of relativistic solar energetic particle events observed by neutron monitors Type Master 1
  Year 2020 Publication Internship report, M1, Univ. Paris Sciences-Lettres Abbreviated Journal  
  Volume Issue (up) Pages  
  Keywords  
  Abstract This Report Presents The Result Of The Measurement Of Characteristic Times For Relativistic Solar Energetic Par- Ticle Events Observed By Neutron Monitors. The Typical Profile Of A Solar Event Observed By Neutrons Monitors Is A Fast Rise And A Slow Decay. But These Times Differ Between Events (From A Few Minutes To Several Hours) And Quantifying Them Is Interesting. In Fact, Studying These Characteristic Times Allows Us To Better Understand Solar High Energy Events. For This, We Used The Neutron Monitor Database (Nmdb) [1] And Python To Compute The Rise Time And The Decay Time. We Observed That There Is A Linear Relationship Between Rise Time And Decay Time Of These Solar Events.there Are Some Possible Interpretations For These Characteristic Times. These Times May Be Related To The Dura- Tion Of Particle Acceleration Or The Propagation Of The Particles In The Interplanetary Medium. We Looked Then For A Link Between The Measurement Of Neutron Monitors At The Earth And The Solar Activity: In X-rays, And The Microwave Domain. Furthermore, We Studied The Fluctuations Of The Interplanetary Magnetic Field. However, All These Attempts Were Unsuccessful To Find A Relation With The Rise Time Measured By Neutron Monitors. But Ejection Speeds Of Coronal Mass Ejections And Rise Time Solar Events Detected By Neutron Monitors May Be Linked.  
  Programme 227  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8097  
Permanent link to this record
 
 
Author Haberle, V. openurl 
  Title Automatic Characterisation of Magnetic Indices with Artificial Intelligence Type Master 2
  Year 2020 Publication Irap, Toulouse Abbreviated Journal  
  Volume Issue (up) Pages  
  Keywords  
  Abstract  
  Programme 139  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8098  
Permanent link to this record
 
 
Author Panhelleux Léa &Amp; Lochin Pierre openurl 
  Title Télédétection appliquée au suivi des dynamiques de la végétation des îles Kerguelen Type Master 2
  Year 2020 Publication Projet professionnel, master 2 Telenvi Université Rennes 2 Abbreviated Journal  
  Volume Issue (up) Pages  
  Keywords  
  Abstract  
  Programme 136  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8100  
Permanent link to this record
 
 
Author Marina Renedo, Paco Bustamante, Yves Cherel, Zoyne Pedrero, Emmanuel Tessier, David Amouroux doi  openurl
  Title A “seabird-eye” on mercury stable isotopes and cycling in the Southern Ocean Type Journal
  Year 2020 Publication Science of The Total Environment Abbreviated Journal  
  Volume 742 Issue (up) Pages 140499  
  Keywords Biogeochemistry Latitude Methylmercury Penguins Skuas  
  Abstract Since mercury (Hg) biogeochemistry in the Southern Ocean is minimally documented, we investigated Hg stable isotopes in the blood of seabirds breeding at different latitudes in the Antarctic, Subantarctic and Subtropical zones. Hg isotopic composition was determined in adult penguins (5 species) and skua chicks (2 species) from Adélie Land (66°39′S, Antarctic) to Crozet (46°25′S, Subantarctic) and Amsterdam Island (37°47′S, Subtropical). Mass-dependent (MDF, δ202Hg) and mass-independent (MIF, Δ199Hg) Hg isotopic values separated populations geographically. Antarctic seabirds exhibited lower δ202Hg values (−0.02 to 0.79 ‰, min-max) than Subantarctic (0.88 to 2.12 ‰) and Subtropical (1.44 to 2.37 ‰) seabirds. In contrast, Δ199Hg values varied slightly from Antarctic (1.31 to 1.73 ‰) to Subtropical (1.69 to 2.04 ‰) waters. The extent of methylmercury (MeHg) photodemethylation extrapolated from Δ199Hg values was not significantly different between locations, implying that most of the bioaccumulated MeHg was of mesopelagic origin. The larger increase of MDF between the three latitudes co-varies with MeHg concentrations. This supports an increasing effect of specific biogenic Hg pathways from Antarctic to Subtropical waters, such as Hg biological transformations and accumulations. This “biogenic effect” among different productive southern oceanic regions can also be related to different mixed layer depth dynamics and biological productivity turnover that specifically influence the vertical transport between the mesopelagic and the photic zones. This study shows the first Hg isotopic data of the Southern Ocean at large scale and reveals how regional Southern Ocean dynamics and productivity control marine MeHg biogeochemistry and the exposure of seabirds to Hg contamination.  
  Programme 109  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0048-9697 ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8081  
Permanent link to this record
 
 
Author Sittler, B., Lang, J., Gilg, O., Aebischer, A. openurl 
  Title Snowy owls in Greenland on the brink? Insights from 32 years of long-term monitoring on Traill Island Type Peer-reviewed symposium
  Year 2020 Publication 5th international snowy owl working group. ISOWG, 9-13 march 2020, Pasvik, Norway Abbreviated Journal  
  Volume Issue (up) Pages  
  Keywords  
  Abstract  
  Programme 1036  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8466  
Permanent link to this record
 
 
Author Launay M openurl 
  Title Analyse de placettes de recrutement pour le suivi des communautés marines benthiques côtières aux Iles Kerguelen (Terres australes françaises) Type Master 2
  Year 2020 Publication Master 2 Systématique, Evolution et Paléontologie, Sorbonne Université / Muséum national d'Histoire naturelle de Paris / Observatoire des Sciences de l'Univers THETA / Université de Bourgogne Abbreviated Journal  
  Volume Issue (up) Pages 36 pp  
  Keywords  
  Abstract  
  Programme 1044  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8066  
Permanent link to this record
 
 
Author Calas A openurl 
  Title Image analysis of settlement plates for monitoring marine benthic communities of the Kerguelen Islands Type Master 2
  Year 2020 Publication Master 2 IMBRSea (International Master of Science in Marine Biological Resources), Université de Gand / Université de Bourgogne Abbreviated Journal  
  Volume Issue (up) Pages 35 pp  
  Keywords  
  Abstract  
  Programme 1044  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8068  
Permanent link to this record
 
 
Author Yves Cherel, Evgeny V. Romanov, Pavanee Annasawmy, Delphine Thibault, Frédéric Ménard doi  isbn
openurl 
  Title Micronektonic fish species over three seamounts in the southwestern Indian Ocean Type Journal
  Year 2020 Publication Deep Sea Research Part II: Topical Studies in Oceanography Abbreviated Journal  
  Volume 176 Issue (up) Pages 104777  
  Keywords Lanternfish Tropical waters  
  Abstract Taxonomic composition, abundance and biological features of micronektonic fish were investigated using pelagic trawls conducted near and over the summits of three seamounts located in the western Indian Ocean (La Pérouse, MAD-Ridge and Walters Shoal). Mesopelagic fish from three families accounted for 80% by number of the total catch (5714 specimens, 121 taxa), namely myctophids (59%), gonostomatids (12%) and sternoptychids (9%). Whereas the gonostomatid Sigmops elongatus was the most abundant species around La Pérouse seamount, myctophids were the most diverse and dominant group by number in all three studied areas. Most myctophids were high-oceanic species, which included the numerically dominant Benthosema suborbitale, Ceratoscopelus warmingii, Diaphus perspicillatus, Hygophum hygomii, and Lobianchia dofleini. The few remaining myctophids (Diaphus suborbitalis being the most abundant) were pseudoceanic fish, highlighting the association with landmasses. The study adds one myctophid species new to the Indian Ocean (Diaphus bertelseni), and a second record in the literature of the recently described sternoptychid Argyripnus hulleyi.  
  Programme 109  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0967-0645 ISBN 0967-0645 Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8073  
Permanent link to this record
 
 
Author Lisa C. Matthes, C. J. Mundy, S. L.-Girard, M. Babin, G. Verin, J. K. Ehn doi  isbn
openurl 
  Title Spatial Heterogeneity as a Key Variable Influencing Spring-Summer Progression in UVR and PAR Transmission Through Arctic Sea Ice Type Journal
  Year 2020 Publication Frontiers in Marine Science Abbreviated Journal  
  Volume 7 Issue (up) Pages 183  
  Keywords  
  Abstract The transmission of ultraviolet (UVR) and photosynthetically available radiation (PAR) through sea ice is a key factor controlling under-ice phytoplankton growth in seasonally ice-covered waters. The increase toward sufficient light levels for positive net photosynthesis occurs concurrently with the sea ice melt progression in late spring when ice surface conditions shift from a relatively homogeneous high-albedo snow cover to a less reflective mosaic of bare ice and melt ponds. Here, we present a detailed dataset on the spatial and temporal progression of transmitted UVR and PAR in relation to changing quantities of snow, sea ice and melt ponds. Data were collected with a remotely operated vehicle (ROV) during the GreenEdge landfast sea ice campaign in June–July 2016 in southwestern Baffin Bay. Over the course of melt progression, there was a 10-fold increase in spatially averaged UVR and PAR transmission through the sea ice cover, reaching a maximum transmission of 31% for PAR, 7% for UVB, and 26% for UVA radiation. The depth under the sea ice experiencing spatial variability in light levels due to the influence of surface heterogeneity in snow, white ice and melt pond distributions increased from 7 ± 4 to 20 ± 6 m over our study. Phytoplankton drifting in under-ice surface waters were thus exposed to variations in PAR availability of up to 43%, highlighting the importance to account for spatial heterogeneity in light transmission through melting sea ice. Consequently, we demonstrate that spatial averages of PAR transmission provided more representative light availability estimates to explain under-ice bloom progression relative to single point irradiance measurements during the sea ice melt season. Encouragingly, the strong dichotomy between white ice and melt pond PAR transmittance and surface albedo permitted a very good estimate of spatially averaged light transmission from drone imagery of the surface and point transmittance measurements beneath different ice surface types.  
  Programme 1164  
  Campaign  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2296-7745 ISBN 2296-7745 Medium  
  Area Expedition Conference  
  Notes Approved yes  
  Call Number Serial 8114  
Permanent link to this record
Select All    Deselect All << 1 2 3 4 5 6 7 8 9 10 >> [11–20]
List View
 | 
Citations
 | 
Details
   print
toggle visibility Cite Options
Home Show Record  |  Help