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Title |
Enhanced upward heat transport at deep submesoscale ocean fronts |
Type |
Journal |
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Year |
2020 |
Publication |
Nature Geoscience |
Abbreviated Journal |
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Volume |
13 |
Issue |
1 |
Pages |
50-55 |
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Keywords |
Physical oceanography |
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Abstract |
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Programme |
109,1201 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Original Title |
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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 |
1752-0908 |
ISBN |
1752-0908 |
Medium |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8264 |
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Author |
Eveline Pinseel, Steven B. Janssens, Elie Verleyen, Pieter Vanormelingen, Tyler J. Kohler, Elisabeth M. Biersma, Koen Sabbe, Bart Van de Vijver, Wim Vyverman |
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Title |
Global radiation in a rare biosphere soil diatom |
Type |
Journal |
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Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
2382 |
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Keywords |
Biogeography Phylogenetics Speciation |
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Abstract |
Soil micro-organisms drive the global carbon and nutrient cycles that underlie essential ecosystem functions. Yet, we are only beginning to grasp the drivers of terrestrial microbial diversity and biogeography, which presents a substantial barrier to understanding community dynamics and ecosystem functioning. This is especially true for soil protists, which despite their functional significance have received comparatively less interest than their bacterial counterparts. Here, we investigate the diversification of Pinnularia borealis, a rare biosphere soil diatom species complex, using a global sampling of >800 strains. We document unprecedented high levels of species-diversity, reflecting a global radiation since the Eocene/Oligocene global cooling. Our analyses suggest diversification was largely driven by colonization of novel geographic areas and subsequent evolution in isolation. These results illuminate our understanding of how protist diversity, biogeographical patterns, and members of the rare biosphere are generated, and suggest allopatric speciation to be a powerful mechanism for diversification of micro-organisms. |
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Programme |
136,1167 |
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Thesis |
Bachelor's thesis |
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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 |
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Call Number |
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Serial |
8269 |
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Author |
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Title |
Plutonic processes in transitional oceanic plateau crust: Structure, age and emplacement of the South Rallier du Baty laccolith, Kerguelen Islands |
Type |
Journal |
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Year |
2020 |
Publication |
Terra Nova |
Abbreviated Journal |
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Volume |
32 |
Issue |
6 |
Pages |
408-414 |
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Keywords |
alkaline magmatism Kerguelen oceanic plateau pluton emplacement syenite intrusion |
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Abstract |
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Programme |
444-1077 |
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Address |
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Thesis |
Bachelor's thesis |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1365-3121 |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8270 |
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Author |
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Title |
Southern Ocean in-situ temperature trends over 25 years emerge from interannual variability |
Type |
Journal |
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Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal |
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Volume |
12 |
Issue |
1 |
Pages |
514 |
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Keywords |
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Abstract |
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Programme |
694 |
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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 |
2041-1723 |
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 |
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Call Number |
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Serial |
7837 |
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| Permanent link to this record |
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Author |
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Title |
Genome size and chromosome number of ten plant species from Kerguelen Islands |
Type |
Journal |
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Year |
2020 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
43 |
Issue |
12 |
Pages |
1985-1999 |
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Keywords |
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Abstract |
Kerguelen Islands harbor a unique, probably very ancient flora with a high rate of endemism. However, the evolutionary history and characteristics of this flora still require investigation. This concerns in particular genome size and ploidy level variation, despite the evolutionary and ecological significance of those traits. Here we report the first assessment of genome size, using flow cytometry, for eight plant species of which two are endemics of Kerguelen Islands and four of the South Indian Ocean Province. The 2C DNA value ranged from 1.08 pg for Pringlea antiscorbutica to 11.88 pg for Ranunculus biternatus. The chromosome numbers of Colobanthus kerguelensis (2n?=?80), Lyallia kerguelensis (2n?=?96) and Poa kerguelensis (2n?=?28) were also reported in this study for the first time. Overall, our data allowed to infer that all Kerguelen studied species are polyploid (from tetra- to octopolyploid). Intra-genus comparisons showed significant differences of 2C DNA values among Poa and among Ranunculus species, despite their identical ploidy level. In addition, our data highlight the existence of an intraspecific variability of genome size for the two octoploid species Colobanthus kerguelensis and Lyallia kerguelensis. Finally, our data also support the hypothesis regarding which polyploidy may have played a major role in the adaptation of flowering plants to high latitudes, as it has been suggested for arctic species. |
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Programme |
1116 |
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Series Editor |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1432-2056 |
ISBN |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6212 |
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Author |
Thomas Frederikse, Maya K. Buchanan, Erwin Lambert, Robert E. Kopp, Michael Oppenheimer, D. J. Rasmussen, Roderik S. W. van de Wal |
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Title |
Antarctic Ice Sheet and emission scenario controls on 21st-century extreme sea-level changes |
Type |
Journal |
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Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
390 |
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Keywords |
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Abstract |
Uncertainties in Representative Concentration Pathway (RCP) scenarios and Antarctic Ice Sheet (AIS) melt propagate into uncertainties in projected mean sea-level (MSL) changes and extreme sea-level (ESL) events. Here we quantify the impact of RCP scenarios and AIS contributions on 21st-century ESL changes at tide-gauge sites across the globe using extreme-value statistics. We find that even under RCP2.6, almost half of the sites could be exposed annually to a present-day 100-year ESL event by 2050. Most tropical sites face large increases in ESL events earlier and for scenarios with smaller MSL changes than extratropical sites. Strong emission reductions lower the probability of large ESL changes but due to AIS uncertainties, cannot fully eliminate the probability that large increases in frequencies of ESL events will occur. Under RCP8.5 and rapid AIS mass loss, many tropical sites, including low-lying islands face a MSL rise by 2100 that exceeds the present-day 100-year event level. |
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Programme |
688 |
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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 |
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Call Number |
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Serial |
6437 |
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Author |
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Title |
Antarctic Ozone Enhancement During the 2019 Sudden Stratospheric Warming Event |
Type |
Journal |
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Year |
2020 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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Volume |
47 |
Issue |
14 |
Pages |
e2020GL087810 |
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Keywords |
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Abstract |
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Programme |
209 |
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Edition |
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ISSN |
1944-8007 |
ISBN |
1944-8007 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6954 |
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Author |
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Title |
A framework for mapping the distribution of seabirds by integrating tracking, demography and phenology |
Type |
Journal |
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Year |
2020 |
Publication |
Journal of Applied Ecology |
Abbreviated Journal |
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Volume |
57 |
Issue |
3 |
Pages |
514-525 |
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Keywords |
albatrosses at-sea threats conservation distributions longline fisheries megafauna petrels seabird density |
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Abstract |
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Programme |
388 |
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Series Issue |
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Edition |
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ISSN |
1365-2664 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
7655 |
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Author |
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Title |
Enhancement of ocean and sea ice in situ observations in the Arctic under the Horizon2020 project INTAROS |
Type |
Peer-reviewed symposium |
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Year |
2020 |
Publication |
Ocean Science Meeting 2020 |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
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Abstract |
The H2020 project Integrated Arctic Observation System (INTAROS) aspires to increase the temporal and geographic coverage of in situ observations and add new key geophysical and biogeochemical variables in selected regions of the Arctic. By using a combination of mature and new instruments and sensors in integration with existing observatories, INTAROS aims to fill selected gaps in the present-day system and build additional capacity of the Arctic monitoring networks for ocean and sea ice. Three reference sites have been selected as key locations for monitoring ongoing Arctic changes: Costal Greenland, paramount for freshwater output from the Greenland ice sheet; North of Svalbard (covering the region from shelf to deep basin) – the hot-spot for ocean-air-sea ice interactions, and heat and biological energy input to the European Arctic; and Fram Strait – the critical gateway for exchanges between the Arctic and the World oceans. The existing observatories in the reference sites have been extended with new moorings and novel autonomous instrumentation, in particular for biogeochemical measurements and sea ice observations. Bottom-mounted instruments have been also implemented for seismic observations. A distributed observatory for ocean and sea ice in the Arctic Ocean and sub-Arctic seas includes non-stationary components such as ice-tethered observing platforms, float, gliders, and ships of opportunities, collecting multidisciplinary observations, still missing from the Arctic regions. New sensors, integrated platforms and experimental set-ups are currently under implementation during a two-year long deployment phase (2018-2020) with an aim to evaluate their sustained use in a future iAOS. New observations will be used for integration of new data products, demonstration studies and stakeholder consultations, contributing also to ongoing and future long-term initiatives (e.g. SAON). |
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Programme |
1141 |
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Approved |
yes |
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Call Number |
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Serial |
3811 |
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Author |
Mioara Mandea, Aude Chambodut |
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Title |
Geomagnetic Field Processes and Their Implications for Space Weather |
Type |
Journal |
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Year |
2020 |
Publication |
Surveys in Geophysics |
Abbreviated Journal |
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Volume |
41 |
Issue |
6 |
Pages |
1611-1627 |
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Keywords |
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Abstract |
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Programme |
139 |
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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 |
1573-0956 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7016 |
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| Permanent link to this record |
