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Type |
Journal |
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Year |
2018 |
Publication |
Physics of the earth and planetary interiors |
Abbreviated Journal |
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Volume |
279 |
Issue |
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Pages |
1-14 |
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Keywords  |
Chile Earthquake source observations Kinematic source inversion Rupture process Subduction zone |
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Programme |
133 |
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0031-9201 |
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yes |
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Call Number |
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Serial |
7879 |
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Title |
Evaluation of the inter-annual variability of stratospheric chemical composition in chemistry-climate models using ground-based multi species time series |
Type |
Journal |
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Year |
2016 |
Publication |
Journal of Atmospheric and Solar-Terrestrial Physics |
Abbreviated Journal |
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Volume |
145 |
Issue |
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Pages |
61-84 |
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Keywords |
Chemistry climate model NDACC observation Stratosphere Variability |
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Abstract |
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Programme |
209 |
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Edition |
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ISSN |
1364-6826 |
ISBN |
1364-6826 |
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yes |
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Call Number |
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Serial |
7295 |
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Title |
Intrathalline Metabolite Profiles in the Lichen Argopsis friesiana Shape Gastropod Grazing Patterns |
Type |
Journal |
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Year |
2018 |
Publication |
Journal of Chemical Ecology |
Abbreviated Journal |
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Volume |
44 |
Issue |
5 |
Pages |
471-482 |
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Keywords |
Chemical ecology Herbivory Lichen-gastropod interactions Notodiscus hookeri Snail Stereocaulaceae Subantarctic islands |
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Abstract |
Lichen-gastropod interactions generally focus on the potential deterrent or toxic role of secondary metabolites. To better understand lichen-gastropod interactions, a controlled feeding experiment was designed to identify the parts of the lichen Argopsis friesiana consumed by the Subantarctic land snail Notodiscus hookeri. Besides profiling secondary metabolites in various lichen parts (apothecia, cephalodia, phyllocladia and fungal axis of the pseudopodetium), we investigated potentially beneficial resources that snails can utilize from the lichen (carbohydrates, amino acids, fatty acids, polysaccharides and total nitrogen). Notodiscus hookeri preferred cephalodia and algal layers, which had high contents of carbohydrates, nitrogen, or both. Apothecia were avoided, perhaps due to their low contents of sugars and polyols. Although pseudopodetia were characterized by high content of arabitol, they were also rich in medullary secondary compounds, which may explain why they were not consumed. Thus, the balance between nutrients (particularly nitrogen and polyols) and secondary metabolites appears to play a key role in the feeding preferences of this snail. |
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Programme |
136 |
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Edition |
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ISSN |
1573-1561 |
ISBN |
1573-1561 |
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yes |
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Call Number |
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Serial |
7022 |
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Title |
Stable Isotope Trajectory Analysis (SITA): A new approach to quantify and visualize dynamics in stable isotope studies |
Type |
Journal |
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Year |
2022 |
Publication |
Ecological Monographs |
Abbreviated Journal |
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Volume |
92 |
Issue |
2 |
Pages |
e1501 |
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Keywords |
changes composition dynamics food web functioning spatial stable isotope structure temporal trajectories |
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Abstract |
Ecologists working with stable isotopes have to deal with complex datasets including temporal and spatial replication, which makes the analysis and the representation of patterns of change challenging, especially at high resolution. Due to the lack of a commonly accepted conceptual framework in stable isotope ecology, the analysis and the graphical representation of stable isotope spatial and temporal dynamics of stable isotope value at the organism or community scale remained in the past often descriptive and qualitative, impeding the quantitative detection of relevant functional patterns. The recent community trajectory analysis (CTA) framework provides more explicit perspectives for the analysis and the visualization of ecological trajectories. Building on CTA, we developed the Stable Isotope Trajectory Analysis (SITA) framework, to analyze the geometric properties of stable isotope trajectories on n-dimensional (n ? 2) spaces of analysis defined analogously to the traditional multivariate spaces (?) used in community ecology. This approach provides new perspectives into the quantitative analysis of spatio-temporal trajectories in stable isotope spaces (??) and derived structural and functional dynamics (?? space). SITA allows the calculation of a set of trajectory metrics, based on either trajectory distances or directions, and new graphical representation solutions, both easily performable in an R environment. Here, we illustrate the use of our approach by reanalyzing previously published datasets from marine, terrestrial, and freshwater ecosystems. We highlight the insights provided by this new analytic framework at the individual, population, community, and ecosystems levels, and discuss applications, limitations, and development potential. |
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Programme |
109 |
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Edition |
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ISSN |
1557-7015 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8401 |
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Author |
Alexandra Lavrillier, Semen Gabyshev, Liudmila Egorova, Galina Makarova, Maia Lomovtseva-Adukanova |
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Title |
Analysing Non-Existent and Existing Tourisms in Eastern Siberia among the Evenki, Even, Koryak and Itelmen |
Type |
Journal |
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Year |
2021 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
2020/3-2021/1 |
Pages |
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Keywords |
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Abstract |
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Programme |
1127 |
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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 |
0755-7809 |
ISBN |
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Area |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6582 |
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Author |
Bastien Labarrere |
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Title |
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Type |
Thesis |
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Year |
2017 |
Publication |
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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 |
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Programme |
136,1116 |
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Thesis |
Bachelor's thesis |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
8045 |
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| Permanent link to this record |
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Author |
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Title |
Are gastrointestinal parasites associated with the cyclic population dynamics of their arctic lemming hosts? |
Type |
Journal |
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Year |
2020 |
Publication |
International Journal for Parasitology: Parasites and Wildlife |
Abbreviated Journal |
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Volume |
10 |
Issue |
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Pages |
6-12 |
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Keywords |
Cestodes Eimerians Faecal prevalence Greenland Population dynamics Rodent-parasites interactions |
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Abstract |
Many rodents, including most populations of arctic lemmings (genus Dicrostonyx and Lemmus), have cyclic population dynamics. Among the numerous hypotheses which have been proposed and tested to explain this typical characteristic of some terrestrial vertebrate communities, trophic interactions have often been presented as the most likely drivers of these periodic fluctuations. The possible role of parasites has, however, only seldom been assessed. In this study, we genetically measured the prevalence of two endoparasite taxa, eimerians and cestodes, in 372 faecal samples from collared lemmings, over a five year period and across three distant sites in Northeast Greenland. Prevalence of cestodes was low (2.7% over all sites and years) and this taxon was only found at one site (although in 4 out of 5 years) in adult hosts. By contrast, we found high prevalence for eimerians (77.7% over all sites and years), which occurred at all sites, in every year, for both age classes (at the Hochstetter Forland site where both adult and juvenile faeces were collected) and regardless of reproductive and social status inferred from the characteristics of the lemming nests where the samples had been collected. Prevalence of eimerians significantly varied among years (not among sites) and was higher for juvenile than for adult lemmings at the Hochstetter Forland site. However, higher prevalence of eimerians (Pt) was only associated with lower lemming density (Nt) at one of the three sites and we found no delayed density dependence between Nt and Pt+1 to support the parasite hypothesis. Our results show that there is no clear relation between lemming density and eimerian faecal prevalence in Northeast Greenland and hence no evidence that eimerians could be driving the cyclic population dynamics of collared lemmings in this region. |
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Programme |
1036 |
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Series Title |
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Abbreviated Series Title |
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Edition |
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ISSN |
2213-2244 |
ISBN |
2213-2244 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7616 |
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Author |
Kojadinovic Jessica, Jackson Christine H, Cherel Yves, Jackson George D, Bustamante Paco, |
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Title |
Multi-elemental concentrations in the tissues of the oceanic squid Todarodes filippovae from Tasmania and the southern Indian Ocean
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Type |
Journal Article |
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Year |
2011 |
Publication |
Ecotoxicology and Environmental Safety |
Abbreviated Journal |
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Volume |
74 |
Issue |
5 |
Pages |
1238-1249 |
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Keywords |
Cephalopod, Southern Indian Ocean, Tasmania, Metals, Bioaccumulation, Consumption guidelines, |
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Abstract |
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Programme |
109 |
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Address |
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Corporate Author |
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Thesis |
Bachelor's 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 |
0147-6513 |
ISBN |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
3260 |
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Author |
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Title |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
565 |
Issue |
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Pages |
197-215 |
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Keywords |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes |
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Abstract |
Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish prey included mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides being the main item. Cephalopod beaks were identified, most of which were from adult oceanic squids. Albatrosses preyed upon the same taxa at both localities, but in different proportions. Histioteuthis atlantica (30% by number), Galiteuthis glacialis (13%), and Kondakovia longimana (10%) were the main squid prey at Kerguelen, while K. longimana (35%) and H. eltaninae (23%) dominated at Crozet. Chick feather ?15N values were higher in wandering albatrosses than in other oceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumer together with the sperm whale and sleeper shark that have similar ?15N values. Satellite-tracked wandering albatrosses foraged in local subantarctic waters and farther north, with some Crozet birds overlapping with those from the Kerguelen population in western Kerguelen waters. Anthropogenic items (e.g. plastic fragments, hooks) were found in half the food samples. All fishery-related items were from the local toothfish fishery. The high number of hooks from Crozet indicated the presence of a fairly large number of illegal longliners in the area during the Austral winter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietary investigations to achieve effective conservation and management of this endangered group of charismatic seabirds. |
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Programme |
109 |
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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 |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
Medium |
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Expedition |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6635 |
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| Permanent link to this record |
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Author |
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Title |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
Type |
Journal |
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Year |
2017 |
Publication |
Marine Ecology Progress Series |
Abbreviated Journal |
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Volume |
565 |
Issue |
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Pages |
197-215 |
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Keywords |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes |
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Abstract |
Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish prey included mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides being the main item. Cephalopod beaks were identified, most of which were from adult oceanic squids. Albatrosses preyed upon the same taxa at both localities, but in different proportions. Histioteuthis atlantica (30% by number), Galiteuthis glacialis (13%), and Kondakovia longimana (10%) were the main squid prey at Kerguelen, while K. longimana (35%) and H. eltaninae (23%) dominated at Crozet. Chick feather ?15N values were higher in wandering albatrosses than in other oceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumer together with the sperm whale and sleeper shark that have similar ?15N values. Satellite-tracked wandering albatrosses foraged in local subantarctic waters and farther north, with some Crozet birds overlapping with those from the Kerguelen population in western Kerguelen waters. Anthropogenic items (e.g. plastic fragments, hooks) were found in half the food samples. All fishery-related items were from the local toothfish fishery. The high number of hooks from Crozet indicated the presence of a fairly large number of illegal longliners in the area during the Austral winter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietary investigations to achieve effective conservation and management of this endangered group of charismatic seabirds. |
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Programme |
109 |
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Address |
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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 |
0171-8630, 1616-1599 |
ISBN |
0171-8630, 1616-1599 |
Medium |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
7153 |
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| Permanent link to this record |
