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Author |
Chiara Papetti, Massimiliano Babbucci, Agnes Dettai, Andrea Basso, Magnus Lucassen, Lars Harms, Celine Bonillo, Franz Maximilian Heindler, Tomaso Patarnello, Enrico Negrisolo |
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Title |
Not Frozen in the Ice: Large and Dynamic Rearrangements in the Mitochondrial Genomes of the Antarctic Fish |
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Year  |
2021 |
Publication |
Genome Biology and Evolution |
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Volume |
13 |
Issue |
3 |
Pages |
evab017 |
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Abstract |
The vertebrate mitochondrial genomes generally present a typical gene order. Exceptions are uncommon and important to study the genetic mechanisms of gene order rearrangements and their consequences on phylogenetic output and mitochondrial function. Antarctic notothenioid fish carry some peculiar rearrangements of the mitochondrial gene order. In this first systematic study of 28 species, we analyzed known and undescribed mitochondrial genome rearrangements for a total of eight different gene orders within the notothenioid fish. Our reconstructions suggest that transpositions, duplications, and inversion of multiple genes are the most likely mechanisms of rearrangement in notothenioid mitochondrial genomes. In Trematominae, we documented an extremely rare inversion of a large genomic segment of 5,300?bp that partially affected the gene compositional bias but not the phylogenetic output. The genomic region delimited by nad5 and trnF, close to the area of the Control Region, was identified as the hot spot of variation in Antarctic fish mitochondrial genomes. Analyzing the sequence of several intergenic spacers and mapping the arrangements on a newly generated phylogeny showed that the entire history of the Antarctic notothenioids is characterized by multiple, relatively rapid, events of disruption of the gene order. We hypothesized that a pre-existing genomic flexibility of the ancestor of the Antarctic notothenioids may have generated a precondition for gene order rearrangement, and the pressure of purifying selection could have worked for a rapid restoration of the mitochondrial functionality and compactness after each event of rearrangement. |
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1124 |
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1759-6653 |
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yes |
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8235 |
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Year |
2021 |
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Atmospheric Chemistry and Physics |
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Volume |
21 |
Issue |
4 |
Pages |
3035-3057 |
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1192 |
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1680-7316 |
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yes |
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8604 |
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Title |
Antarctic surface temperature and elevation during the Last Glacial Maximum |
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Year |
2021 |
Publication |
Science |
Abbreviated Journal |
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Volume |
372 |
Issue |
6546 |
Pages |
1097-1101 |
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902 |
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8254 |
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Title |
Predation by feral cats threatens great albatrosses |
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Year |
2021 |
Publication |
Biological Invasions |
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Volume |
23 |
Issue |
8 |
Pages |
2389-2405 |
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109 |
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1573-1464 |
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yes |
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Serial |
7938 |
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Author |
Christophe Barbraud, Karine Delord |
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Title |
Selection against immigrants in wild seabird populations |
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Journal |
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Year |
2021 |
Publication |
Ecology Letters |
Abbreviated Journal |
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Volume |
24 |
Issue |
1 |
Pages |
84-93 |
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Keywords |
Dispersal fitness immigrant seabirds sex-biased dispersal |
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109 |
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1461-0248 |
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yes |
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8418 |
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Title |
Seabird population changes following mammal eradication at oceanic Saint-Paul Island, Indian Ocean |
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Journal |
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Year |
2021 |
Publication |
Journal for Nature Conservation |
Abbreviated Journal |
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Volume |
63 |
Issue |
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Pages |
126049 |
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Keywords |
Island restoration Petrels Population growth rate Rats Shearwaters Terns |
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Abstract |
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Programme |
109 |
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ISSN |
1617-1381 |
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yes |
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Serial |
8459 |
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Title |
A dedicated robust instrument for water vapor generation at low humidity for use with a laser water isotope analyzer in cold and dry polar regions |
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Journal |
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Year |
2021 |
Publication |
Atmospheric Measurement Techniques |
Abbreviated Journal |
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Volume |
14 |
Issue |
4 |
Pages |
2907-2918 |
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1110,1169,1205 |
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Bachelor's thesis |
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ISSN |
1867-1381 |
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yes |
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Call Number |
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Serial |
8010 |
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Author |
Christophe Sauser, Karine Delord, Christophe Barbraud |
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Title |
Demographic sensitivity to environmental forcings: a multi-trait, multi-colony approach |
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Journal |
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Year |
2021 |
Publication |
Oikos |
Abbreviated Journal |
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Volume |
130 |
Issue |
6 |
Pages |
943-957 |
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109 |
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ISSN |
1600-0706 |
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1600-0706 |
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yes |
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8039 |
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Author |
Christophe Sauser, Karine Delord, Christophe Barbraud |
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Title |
Sea ice and local weather affect reproductive phenology of a polar seabird with breeding consequences |
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Journal |
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Year |
2021 |
Publication |
Ornithological Applications |
Abbreviated Journal |
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Volume |
123 |
Issue |
4 |
Pages |
duab032 |
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109 |
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ISSN |
0010-5422 |
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yes |
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8431 |
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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) |
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Journal |
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Year |
2021 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
770 |
Issue |
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Pages |
145252 |
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Keywords |
Bacterial viability EPS isomerase Micro- and macro-zooplankton Salinity stress Sea ice algae |
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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. |
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1164 |
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0048-9697 |
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8253 |
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