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Journal Article |
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2013 |
Publication |
Bulletin of the Seismological Society of America |
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133 |
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Bachelor's thesis |
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ISSN |
0037-1106 |
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yes |
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4314 |
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Journal Article |
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Year |
2011 |
Publication |
Polar Science |
Abbreviated Journal |
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Volume |
5 |
Issue |
2 |
Pages |
298-312 |
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Keywords |
Barcode, Cytochrome oxidase 1, CEAMARC, Taxonomy, Systematics, |
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Abstract |
The Dumont dUrville Sea (East Antarctic region) has been less investigated for DNA barcoding and molecular taxonomy than other parts of the Southern Ocean, such as the Ross Sea and the Antarctic Peninsula. The Collaborative East Antarctic MARine Census (CEAMARC) took place in this area during the austral summer of 20072008. The Australian vessel RSV Aurora Australis collected very diverse samples of demersal and benthic organisms. The specimens were sorted centrally, and then distributed to taxonomic experts for molecular and morphological taxonomy and identification, especially barcoding. The COI sequences generated from CEAMARC material provide a sizeable proportion of the Census of Antarctic Marine Life barcodes although the studies are still ongoing, and represent the only source of sequences for a number of species. Barcoding appears to be a valuable method for identification within most groups, despite low divergences and haplotype sharing in a few species, and it is also useful as a preliminary taxonomic exploration method. Several new species are being described. CEAMARC samples have already provided new material for phylogeographic and phylogenetic studies in cephalopods, pycnogonids, teleost fish, crinoids and sea urchins, helping these studies to provide a better insight in the patterns of evolution in the Southern Ocean. |
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1044 |
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Bachelor's thesis |
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ISSN |
1873-9652 |
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yes |
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Call Number |
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Serial |
1647 |
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Title |
Evolutionary pathways among shallow and deep-sea echinoids of the genus Sterechinus in the Southern Ocean
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Type |
Journal Article |
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Year |
2011 |
Publication |
Deep Sea Research Part II: Topical Studies in Oceanography |
Abbreviated Journal |
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Volume |
58 |
Issue |
12 |
Pages |
205-211 |
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Keywords |
Sea urchins, Coastal zone, Deep water, Phylogeny, Biogeography, Evolutionary patterns, COI, |
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Abstract |
Antarctica is structured by a narrow and deep continental shelf that sustains a remarkable number of benthic species. The origin of these species and their affinities with the deep-sea fauna that borders the continent shelf are not clear. To date, two main hypotheses have been considered to account for the evolutionary connection between the faunas: (1) either shallow taxa moved down to deep waters (submergence) or (2) deep-sea taxa colonized the continental shelf (emergence). The regular sea urchin genus Sterechinus is a good model to explore the evolutionary relationships among these faunas because its five nominal species include Antarctic and Subantarctic distributions and different bathymetric ranges. Phylogenetic relationships and divergence times among Sterechinus species were established using the COI mitochondrial gene by assuming a molecular clock hypothesis. The results showed the existence of two genetically distinct main groups. The first corresponds exclusively to the shallow-water Antarctic species S. neumayeri, while the second includes all the other nominal species, either deep or shallow, Antarctic or Subantarctic. Within the latter group, S. dentifer specimens all formed a monophyletic cluster, slightly divergent from all other specimens, which were mixed in a second cluster that included S. agassizi from the continental shelf of Argentina, S. diadema from the Kerguelen Plateau and S. antarcticus from the deep Antarctic shelf. These results suggest that the deeper-water species S. dentifer and S. antarcticus are more closely related to Subantarctic species than to the shallow Antarctic species S. neumayeri. Thus, for this genus, neither the submergence nor emergence scenario explains the relationships between Antarctic and deep-sea benthos. At least in the Weddell quadrant, the observed genetic pattern suggests an initial separation between Antarctic and Subantarctic shallow species, and a much later colonization of deep water from the Subantarctic region, probably promoted by the geomorphology of the Scotia Arc. |
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Programme |
1044 |
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Thesis |
Bachelor's thesis |
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Edition |
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ISSN |
0967-0645 |
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Approved |
yes |
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Call Number |
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Serial |
1649 |
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Title |
Phylogeography and demographic inference in Nacella (Patinigera) concinna (Strebel, 1908) in the western Antarctic Peninsula
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Type |
Journal Article |
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Year |
2011 |
Publication |
Deep Sea Research Part II: Topical Studies in Oceanography |
Abbreviated Journal |
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Volume |
58 |
Issue |
12 |
Pages |
220-229 |
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Keywords |
Southern Ocean, Antarctica, Nacella concinna, COI, Genetic structure, Median-joining network, Elliptic Fourier analysis, Bottleneck effect, Founder effect, |
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Abstract |
Endemic to Antarctic ecosystems, the limpet Nacella (Patinigera) concinna (Strebel, 1908) is an abundant and dominant marine benthic invertebrate of the intertidal and shallow subtidal zone. In order to examine the phylogeographic pattern and historical demography of the species along the western Antarctic Peninsula, we amplified 663 bp of the mitochondrial DNA cytochrome oxidase subunit I of 161 N. concinna specimens from five localities, as well as two specimens from South Georgia and Sub-Antarctic Marion Island. As two different morphotypes, one characterized by an elevated shell in the intertidal and the other by a flat one in the subtidal, have been recurrently reported for this species, we also compared intertidal and subtidal samples from two localities of King George Island (Admiralty and Fildes Bay) through geometric morphometric and genetic analyses. As a result, elliptic Fourier analyses on shell shape morphology detected highly significant differences between intertidal and subtidal morphotypes. In contrast, mtDNA analyses between these morphotypes did not detect statistical differences between them and support the hypothesis that subtidal and intertidal N. concinna forms correspond to be the same population unit. |
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Programme |
1044 |
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Thesis |
Bachelor's thesis |
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ISSN |
0967-0645 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
1651 |
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Author |
Dufumier H. |
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Title |
On the limits of moment tensor inversions of teleseismic body wave spectra. |
Type |
Journal Article |
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Year |
1996 |
Publication |
Pure and applied geophysics |
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Volume |
147 |
Issue |
3 |
Pages |
467-482 |
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Keywords |
Moment tensor, inversion, body waves, conditioning, resolution, information, single-station |
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Abstract |
The limits of linear moment-tensor inversions from long-period teleseismic body waves are analysed in detail, using inverse methods. We focus our attention on single-station and few-stations methods. Information on the feasibility of full or deviatoric moment-tensor determinations prior to inversion are deduced from the system conditioning. The resolution and correlation of the momenttensor components are analysed using the resolution matrix. Conclusions on the importance and independence of the data are drawn from the information matrix. The single--station case and its implications are discussed in greater detail, as well as possible constraints on the inversion. |
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133 |
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ISSN |
0033-4553 |
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yes |
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Call Number |
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Serial |
262 |
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Author |
Beine, H. J.; Amoroso, A.; Esposito, G.; Sparapani, R.; Ianniello, A.; Georgiadis, T.; Nardino, M.; Bonasoni, P.; Cristofanelli, P.; Domine, F. |
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Title |
Deposition of atmospheric nitrous acid on alkaline snow surfaces |
Type |
Journal Article |
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Year |
2005 |
Publication |
Geophysical research letters |
Abbreviated Journal |
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Volume |
32 |
Issue |
10 |
Pages |
L10808 |
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Abstract |
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Programme |
437 |
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ISSN |
0094-8276 |
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Approved |
yes |
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Call Number |
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Serial |
3149 |
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Author |
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Title |
Ilkka Hanski and Small Mammals: from Shrew Metapopulations to Vole and Lemming Cycles |
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Journal |
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Year |
2017 |
Publication |
Annales Zoologici Fennici |
Abbreviated Journal |
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Volume |
54 |
Issue |
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Pages |
153-162 |
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Abstract |
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Programme |
1036 |
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Thesis |
Bachelor's thesis |
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ISSN |
0003-455X, 1797-2450 |
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yes |
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Call Number |
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Serial |
7345 |
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Author |
Bondar T N, Golovkov V P, |
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Title |
IZMIRAN Candidate Models for DGRF 1985, IGRF 1990 and a Secular Variation Forecast Model for the 1990-1995 Period
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Journal Article |
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Year |
1992 |
Publication |
Journal of geomagnetism and geoelectricity |
Abbreviated Journal |
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Volume |
44 |
Issue |
9 |
Pages |
709-717 |
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Abstract |
Two candidate main field models for 1985 and 1990 as well as a forecast for the secular variation are represented as a series of spherical harmonic coefficients up to n=m=10 and n=m=8, respectively. IZMSV, US/UK, USGS forecasting models are compared with extrapolated secular variation observations and with one another. The IZMSV and the USGS are shown to agree best. |
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Programme |
139 |
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Bachelor's thesis |
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ISSN |
0022-1392 |
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yes |
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Call Number |
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Serial |
291 |
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Author |
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Title |
Modeling species response to climate change in sub-Antarctic islands – Echinoids as a case study for the Kerguelen Plateau. |
Type |
Book Chapter |
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Year |
2019 |
Publication |
The kerguelen plateau: marine ecosystem and fisheries. proceedings of the second symposium |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
383-402 |
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Keywords |
species distribution model, trophic niche, isotopic niche, biotic interaction, distribution dynamics |
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Abstract |
In the Kerguelen Islands, the multiple effects of climate change are expected to impact coastal marine habitats. Species distribution models (SDM) can represent a convenient tool to predict the biogeographic response of species to climate change but biotic interactions are not considered in these models. Nevertheless, new species interactions can emerge in communities exposed to environmental changes and the structure of biotic interactions is directly related to the potential resilience of ecosystems. Trophic interaction studies can help predict species vulnerability to environmental changes using carbon (?13C) and nitrogen (?15N) stable isotope ratios to generate trophic models. Using new available data inputs, we generated robust SDM and trophic interaction models to assess the potential response and sensitivity of three echinoid species to future worst-case scenarios of environmental change in the Kerguelen Plateau region. The two modelling approaches provide contrasting insights into the potential responses of each species to future environmental changes with both approaches identifying Abatus cordatus to be particularly vulnerable due to its narrow ecological niche and endemism to near-shore areas. Coupling insights gained from trophic niche ecology with species distribution modelling represents a promising approach that can improve our understanding and ability to predict the potential responses of species to future habitat changes. |
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Programme |
1044 |
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Bachelor's thesis |
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ISSN |
978-1-876934-30-9 |
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yes |
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Call Number |
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Serial |
7494 |
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Author |
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Title |
Long-term monitoring of coastal benthic habitats in the Kerguelen Islands: a legacy of decades of marine biology research |
Type |
Book Chapter |
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Year |
2019 |
Publication |
The kerguelen plateau: marine ecosystem and fisheries. proceedings of the second symposium |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
383-402 |
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Keywords |
sub-Antarctic islands, climate change, frontal shifts, marine reserve, benthos monitoring, thermo recorders, settlement plots, artificial reefs, habitat mapping, scientific diving |
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Abstract |
In the current context of climate change, sea-surface temperature variation, sea level rise and latitudinal shifts of currents and hydrological fronts are expected to affect marine biodiversity of the sub-Antarctic Islands, particularly in coastal waters. Characterising the impacts of climate change on marine communities requires recording environmental modifications through the establishment of long-term monitoring. PROTEKER aims at the establishment of a submarine observatory consisting of multi-disciplinary research: oceanography, habitat mapping and species inventories, genetic, eco-physiological and trophic analyses. It also aims to provide scientific standards for the management of the Kerguelen Marine Reserve. Eighteen sampling sites of previous programs were revisited by scuba diving among which eight were selected for monitoring and were progressively equipped. ROV observations and beam trawling have also been conducted for contextualisation. These sites (Morbihan Bay (4), North (2) and South (2) coast) are monitored using photo/video surveys, temperature and salinity sensors, and settlement plots. Sessile communities collected on settlement plots will be characterised yearly through morphological and DNA techniques. Phylogeographical studies of target taxa are being conducted to improve our knowledge of endemicity and connectivity levels among sub-Antarctic islands. |
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Programme |
1044 |
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Corporate Author |
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Thesis |
Bachelor's thesis |
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Summary Language |
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ISSN |
978-1-876934-30-9 |
ISBN |
978-1-876934-30-9 |
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Notes |
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yes |
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Call Number |
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Serial |
7491 |
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