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Title |
COCHISE: the first light of the Italian millimetre telescope at Concordia (Dome C, Antarctica) |
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Journal |
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Year |
2011 |
Publication |
Experimental Astronomy |
Abbreviated Journal |
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Volume |
31 |
Issue |
2 |
Pages |
199 |
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Programme |
1105 |
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ISSN |
1572-9508 |
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yes |
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Serial  |
8231 |
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Title |
Unexpected Levels of Biological Activity during the Polar Night Offer New Perspectives on a Warming Arctic |
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Journal |
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Year |
2015 |
Publication |
Current Biology |
Abbreviated Journal |
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Volume |
25 |
Issue |
19 |
Pages |
2555-2561 |
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Programme |
1092 |
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ISSN |
0960-9822 |
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yes |
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Serial |
8230 |
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Title |
Glacier inputs influence organic matter composition and prokaryotic distribution in a high Arctic fjord (Kongsfjorden, Svalbard) |
Type |
Journal |
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Year |
2016 |
Publication |
Journal of marine systems |
Abbreviated Journal |
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Volume |
164 |
Issue |
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Pages |
112-127 |
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Keywords |
Bacteria Biomarkers Biopolymeric carbon Climate change Pigments Polar zones |
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Abstract |
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Programme |
1092 |
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ISSN |
0924-7963 |
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yes |
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Serial |
8229 |
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Title |
Spatial and temporal variability in export fluxes of biogenic matter in Kongsfjorden |
Type |
Journal |
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Year |
2016 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
39 |
Issue |
10 |
Pages |
1725-1738 |
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Abstract |
The marine ecosystem of Kongsfjorden experiences large variations in primary productivity due to pronounced seasonal variations in sunlight, glacier melt, and ice cover. The objective of this study was to assess spatial and seasonal variability in the downward export of biogenic matter in Kongsfjorden. Short-term sediment traps were deployed for periods ranging from 21 to 52 h at three stations from the inner fjord to the outer fjord in May, August, and October 2012 and at one mid-fjord station in January 2013. Total particulate matter, particulate organic carbon, phytoplankton cells, chlorophyll a, biogenic particulate silica, and zooplankton fecal pellet fluxes were measured to determine the magnitude and composition of the material exported in the fjord. The amount and composition of export fluxes reflected a large phytoplankton bloom grazed upon by zooplankton in May, the melting of glaciers and the intrusion of Atlantic Water in August, the end of the glacier melt period in October, and the polar night in January. Overall, seasonal changes in the phytoplankton community impacted export efficiency in the fjord, directly through phytoplankton sinking and indirectly through zooplankton grazing. Results obtained in this study may reflect the magnitude and composition of export fluxes to expect in coming years in Kongsfjorden, especially under conditions of warmer Atlantic Water and longer glacier melt periods. |
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Programme |
1092 |
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Edition |
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ISSN |
1432-2056 |
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Approved |
yes |
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Call Number |
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Serial |
8228 |
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Title |
Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord |
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Journal |
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Year |
2017 |
Publication |
Progress in Oceanography |
Abbreviated Journal |
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Volume |
159 |
Issue |
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Pages |
195-210 |
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Keywords |
Arctic Carbon and nitrogen stable isotopes Diatom bloom Fjords Glaciers Kongsfjorden Norway Organic matter Spitsbergen Svalbard |
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Abstract |
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Programme |
1092 |
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Edition |
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ISSN |
0079-6611 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
8227 |
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Title |
Dietary plasticity in the bivalve Astarte moerchi revealed by a multimarker study in two Arctic fjords |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
567 |
Issue |
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Pages |
157-172 |
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Keywords |
Arctic benthos Climate change Compound-specific carbon stable isotopes Fatty acids Filter-feeding bivalves Pelagic-benthic coupling Trophic markers |
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Abstract |
Arctic coastal ecosystems are likely to be strongly affected by predicted environmental changes such as sea-ice decline and increase in freshwater input and turbidity. These changes are expected to impact primary production dynamics and consequently benthic consumers. The trophic relationship between primary producers and benthic primary consumers were compared in 2 Arctic fjords with different seasonal ice-cover: Young Sound (NE Greenland, a high-Arctic fjord) and Kongsfjorden (Svalbard Archipelago, a sub-Arctic fjord). For comparison, we selected the filter-feeding bivalve Astarte moerchi (belonging to the complex A. borealis), which has a broad geographical distribution in the Arctic. The bivalve digestive glands and food sources were characterized with fatty acids (FAs), bulk stable isotopes, and compound-specific stable isotopes of individual FAs. Our results suggest that diatoms of pelagic and/or benthic origin are the main contributors to the A. moerchi diet in Young Sound and make up a less important fraction of the diet in the Kongsfjorden population. A contribution by sympagic diatoms is clearly excluded in the sub-Arctic fjord and needs to be further assessed in the Arctic fjord. The A. moerchi diet in sub-Arctic Kongsfjorden is more diversified, varies with season, and has contributions from dinoflagellates and macroalgal detritus. These results, together with higher concentrations of total FAs in the Young Sound population, demonstrated and characterized the trophic plasticity of this bivalve species. Based on these results, we discuss potential effects of environmental factors (shifts in trophic resources, increase in turbidity) for A. moerchi populations in changing Arctic ecosystems. |
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Programme |
1092 |
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Series Editor |
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Edition |
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ISSN |
0171-8630, 1616-1599 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8226 |
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Author |
Jane Younger, Louise Emmerson, Colin Southwell, Patrick Lelliott, Karen Miller |
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Title |
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Type |
Journal |
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Year |
2015 |
Publication |
BMC Evolutionary Biology |
Abbreviated Journal |
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Volume |
15 |
Issue |
1 |
Pages |
236 |
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Keywords |
Bayesian skyline plot Climate change ecology Demography Holocene Last glacial maximum Molecular ecology Palaeoecology Pygoscelis adeliae Seabirds |
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Abstract |
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Programme |
1091 |
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ISSN |
1471-2148 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
8225 |
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Author |
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Title |
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Type |
Journal |
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Year |
2021 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
44 |
Issue |
7 |
Pages |
1391-1399 |
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Keywords |
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Abstract |
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Programme |
1091 |
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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 |
1432-2056 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8224 |
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Author |
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Title |
Linking morphometric and genetic divergence with host use in the tick complex, Ornithodoros capensis sensu lato |
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Journal |
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Year |
2016 |
Publication |
Infection, Genetics and Evolution |
Abbreviated Journal |
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Volume |
46 |
Issue |
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Pages |
12-22 |
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Keywords |
Adaptation Ectoparasite Host specificity Morphometry Population genetic structure Tropical seabirds |
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Abstract |
Host specific adaptations in parasites can lead to the divergence of conspecific populations. However, this divergence can be difficult to measure because morphological changes may not be expressed or because obvious changes may simply reflect phenotypic plasticity. Combining both genetic and phenotypic information can enable a better understanding of the divergence process and help identify the underlying selective forces, particularly in closely-related species groups. Here, we link genetic and morphometric data to understand divergence patterns within the Ornithodoros (Carios) capensis complex, a group of soft ticks (Argasidae) exploiting colonial seabirds across the globe. Species designations in this complex were historically based on larval morphology and geographic location. However, recent work has suggested that divergence within the group may be at least partially linked to host specificity. We therefore first examined population genetic structure of ticks in relation to host use and geography. These analyses revealed strong structure in relation to host use, both when populations were sympatric and widely allopatric, with a secondary effect of geography. They also demonstrated the presence of several novel and presumably undescribed species exploiting these seabird hosts. We then used geometric morphometrics (landmark and outline analyses) to test whether host-associated genetic divergence is always accompanied by the same phenotypic changes. We found that morphological variation (size and shape) correlated well with genetic structure; tick size and shape varied strongly in relation to host type, and weakly with geography. These results support the hypothesis that speciation in this tick group has been more strongly shaped by host use than by geographic barriers per se. The revealed phenetic patterns now require detailed investigation to link them with host-specific selective forces. |
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Programme |
109,1151 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
1567-1348 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
8223 |
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Author |
C. Barbraud, K. Delord, C. Marteau, H. Weimerskirch |
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Title |
Estimates of population size of white-chinned petrels and grey petrels at Kerguelen Islands and sensitivity to fisheries |
Type |
Journal |
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Year |
2009 |
Publication |
Animal Conservation |
Abbreviated Journal |
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Volume |
12 |
Issue |
3 |
Pages |
258-265 |
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Keywords |
abundance burrow density distance sampling grey petrel Kerguelen Procellaria white-chinned petrel |
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Abstract |
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Programme |
109 |
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Series Volume |
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Edition |
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ISSN |
1469-1795 |
ISBN |
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yes |
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Call Number |
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Serial |
8222 |
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