Records |
Author |
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Title |
Phylogenomic Resolution of Sea Spider Diversification through Integration of Multiple Data Classes |
Type |
Journal |
Year |
2021 |
Publication |
Molecular Biology and Evolution |
Abbreviated Journal |
|
Volume |
38 |
Issue |
2 |
Pages |
686-701 |
Keywords |
|
Abstract |
Despite significant advances in invertebrate phylogenomics over the past decade, the higher-level phylogeny of Pycnogonida (sea spiders) remains elusive. Due to the inaccessibility of some small-bodied lineages, few phylogenetic studies have sampled all sea spider families. Previous efforts based on a handful of genes have yielded unstable tree topologies. Here, we inferred the relationships of 89 sea spider species using targeted capture of the mitochondrial genome, 56 conserved exons, 101 ultraconserved elements, and 3 nuclear ribosomal genes. We inferred molecular divergence times by integrating morphological data for fossil species to calibrate 15 nodes in the arthropod tree of life. This integration of data classes resolved the basal topology of sea spiders with high support. The enigmatic family Austrodecidae was resolved as the sister group to the remaining Pycnogonida and the small-bodied family Rhynchothoracidae as the sister group of the robust-bodied family Pycnogonidae. Molecular divergence time estimation recovered a basal divergence of crown group sea spiders in the Ordovician. Comparison of diversification dynamics with other marine invertebrate taxa that originated in the Paleozoic suggests that sea spiders and some crustacean groups exhibit resilience to mass extinction episodes, relative to mollusk and echinoderm lineages. |
Programme |
1124 |
Campaign |
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Place of Publication |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1537-1719 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8246 |
Permanent link to this record |
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Author |
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Title |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
Type |
Journal |
Year |
2021 |
Publication |
Applied Sciences |
Abbreviated Journal |
|
Volume |
11 |
Issue |
9 |
Pages |
3830 |
Keywords |
Beyond EPICA drilling Estisol ice cores |
Abstract |
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Programme |
1202 |
Campaign |
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Address |
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Place of Publication |
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Editor |
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Series Editor |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8247 |
Permanent link to this record |
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Author |
Noor Johnson, Matthew L Druckenmiller, Finn Danielsen, Peter L Pulsifer |
Title |
The Use of Digital Platforms for Community-Based Monitoring |
Type |
Journal |
Year |
2021 |
Publication |
BioScience |
Abbreviated Journal |
|
Volume |
71 |
Issue |
5 |
Pages |
452-466 |
Keywords |
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Abstract |
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Programme |
1090,1206 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0006-3568 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8248 |
Permanent link to this record |
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Author |
Hajo Eicken, Finn Danielsen, Josephine-Mary Sam, Maryann Fidel, Noor Johnson, Michael K Poulsen, Olivia A Lee, Katie V Spellman, Lisbeth Iversen, Peter Pulsifer, Martin Enghoff |
Title |
Connecting Top-Down and Bottom-Up Approaches in Environmental Observing |
Type |
Journal |
Year |
2021 |
Publication |
BioScience |
Abbreviated Journal |
|
Volume |
71 |
Issue |
5 |
Pages |
467-483 |
Keywords |
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Abstract |
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Programme |
1090,1206 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0006-3568 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8249 |
Permanent link to this record |
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Author |
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Title |
Marine snow morphology illuminates the evolution of phytoplankton blooms and determines their subsequent vertical export |
Type |
Journal |
Year |
2021 |
Publication |
Nature Communications |
Abbreviated Journal |
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Volume |
12 |
Issue |
1 |
Pages |
2816 |
Keywords |
Carbon cycle Marine biology |
Abstract |
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Programme |
1164 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2041-1723 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8250 |
Permanent link to this record |
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Author |
Natasha Roy, James Woollett, Najat Bhiry, Isabel Lemus-Lauzon, Ann Delwaide, Dominique Marguerie |
Title |
Anthropogenic and climate impacts on subarctic forests in the Nain region, Nunatsiavut: Dendroecological and historical approaches |
Type |
Journal |
Year |
2021 |
Publication |
|
Abbreviated Journal |
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Volume |
28 |
Issue |
3-4 |
Pages |
361-376 |
Keywords |
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Abstract |
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Programme |
1080 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1195-6860 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8251 |
Permanent link to this record |
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Author |
M. Legrand, R. Weller, S. Preunkert, B. Jourdain |
Title |
Ammonium in Antarctic Aerosol: Marine Biological Activity Versus Long-Range Transport of Biomass Burning |
Type |
Journal |
Year |
2021 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
|
Volume |
48 |
Issue |
11 |
Pages |
e2021GL092826 |
Keywords |
aerosol black carbon ammonium Antarctic biomass burning et marine biota oxalate potassium |
Abstract |
Year-round records of the ionic composition of Antarctic aerosol were obtained at the inland Dome C (DC) and coastal Neumayer (NM) sites, with additional observations of black carbon (BC) at NM. Discussions focus on the origin of ammonium in Antarctica. This first Antarctic atmospheric study of several species emitted by biomass burning (BB) indicates that BC and oxalate reach a maximum in October in relation to BB activity in the southern hemisphere. Ammonium reaches a maximum 2 months later, suggesting that BB remains a minor ammonium source there. The ammonium maximum in December coincides with the occurrence of diatom blooms in the austral ocean, suggesting that oceanic ammonia emissions are the main source of ammonium in Antarctica. The ammonium to sulfur-derived biogenic species molar ratio of 0.15 in summer suggests far lower ammonia emissions from the Antarctic oceans than midlatitude southern oceans. |
Programme |
903 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1944-8007 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8252 |
Permanent link to this record |
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Author |
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Title |
Viability and stress state of bacteria associated with primary production or zooplankton-derived suspended particulate matter in summer along a transect in Baffin Bay (Arctic Ocean) |
Type |
Journal |
Year |
2021 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
|
Volume |
770 |
Issue |
|
Pages |
145252 |
Keywords |
Bacterial viability EPS isomerase Micro- and macro-zooplankton Salinity stress Sea ice algae |
Abstract |
In the framework of the GreenEdge Project (whose the general objective is to understand the dynamic of the phytoplankton spring bloom in Arctic Ocean), lipid composition and viability and stress state of bacteria were monitored in sea ice and suspended particulate matter (SPM) samples collected in 2016 along a transect from sea ice to open water in Baffin Bay (Arctic Ocean). Lipid analyses confirmed the dominance of diatoms in the bottommost layer of ice and suggested (i) the presence of a strong proportion of micro-zooplankton in SPM samples collected at the western ice covered St 403 and St 409 and (ii) a high proportion of macro-zooplankton (copepods) in SPM samples collected at the eastern ice covered St 413 and open water St 418. The use of the propidium monoazide (PMA) method allowed to show a high bacterial mortality in sea ice and in SPM material collected in shallower waters at St 409 and St 418. This mortality was attributed to the release of bactericidal free fatty acids by sympagic diatoms under the effect of light stress. A strong cis-trans isomerization of bacterial MUFAs was observed in the deeper SPM samples collected at the St 403 and St 409. It was attributed to the ingestion of bacteria stressed by salinity in brine channels of ice by sympagic bacterivorous microzooplankton (ciliates) incorporating trans fatty acids of their preys before to be released in the water column during melting. The high trans/cis ratios also observed in SPM samples collected in the shallower waters at St 413 and St 418 suggest the presence of positively or neutrally buoyant extracellular polymeric substances (EPS)-rich particles retained in sea ice and discharged (with bacteria stressed by salinity) in seawater after the initial release of algal biomass. Such EPS particles, which are generally considered as ideal vectors for bacterial horizontal distribution in the Arctic, appeared to contain a high proportion of dead and non-growing bacteria. |
Programme |
1164 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0048-9697 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8253 |
Permanent link to this record |
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Author |
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Title |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
Type |
Journal |
Year |
2021 |
Publication |
Science |
Abbreviated Journal |
|
Volume |
372 |
Issue |
6546 |
Pages |
1097-1101 |
Keywords |
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Abstract |
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Programme |
902 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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Summary Language |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
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ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8254 |
Permanent link to this record |
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Author |
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Title |
An estimation of the quantitative impacts of copepod grazing on an under sea-ice spring phytoplankton bloom in western Baffin Bay, Canadian Arctic |
Type |
Journal |
Year |
2021 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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Volume |
9 |
Issue |
1 |
Pages |
00092 |
Keywords |
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Abstract |
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Programme |
1164 |
Campaign |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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Summary Language |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2325-1026 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
Call Number |
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Serial |
8255 |
Permanent link to this record |