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Title |
Evolutionary Ecology of Kerguelen Islands Colonization by Introduced Salmonids: SALMEVOL 1041-2 project |
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2022 |
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The present report is a synthesis of all studies conducted around the long-term ecological research (LTER) monitoring of introduced salmonid species in the sub Antarctic Kerguelen islands over the 2015- 2020 period, within the SALMEVOL-2 project. The monitoring encompasses the history of eight species, five of which are still present in Kerguelen, the data and collections spanning five decades and tenths of rivers. Based on this monitoring, but also thanks to various field experiments, we have undertaken to study the evolutionary ecology of these species, using the invasive Brown trout as flagship model, under the premise that the Kerguelen situation, where rivers were previously void of any fish species, could be an anticipation lab of the situation developing at the poles due to climate change. Our findings pertain to life history traits such as individual growth, migration between freshwater and marine ecosystems, microbiomes, but also proximal and ultimate mechanisms of adaptation in relation to the local environment. We also begin to investigate how the expanding metapopulation structure, resulting from multiple invasion events, may affect life history traits evolution. |
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1041 |
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yes |
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8358 |
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Author |
James K. Kleckner, Kyle B. Withers, Eric M. Thompson, John M. Rekoske, Emily Wolin, Morgan P. Moschetti |
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Title |
Automated Detection of Clipping in Broadband Earthquake Records |
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Year |
2022 |
Publication |
Seismological Research Letters |
Abbreviated Journal |
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Volume |
93 |
Issue |
2A |
Pages |
880-896 |
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Abstract |
Because the amount of available ground?motion data has increased over the last decades, the need for automated processing algorithms has also increased. One difficulty with automated processing is to screen clipped records. Clipping occurs when the ground?motion amplitude exceeds the dynamic range of the linear response of the instrument. Clipped records in which the amplitude exceeds the dynamic range are relatively easy to identify visually yet challenging for automated algorithms. In this article, we seek to identify a reliable and fully automated clipping detection algorithm tailored to near?real?time earthquake response needs. We consider multiple alternative algorithms, including (1) an algorithm based on the percentage difference in adjacent data points, (2) the standard deviation of the data within a moving window, (3) the shape of the histogram of the recorded amplitudes, (4) the second derivative of the data, and (5) the amplitude of the data. To quantitatively compare these algorithms, we construct development and holdout datasets from earthquakes across a range of geographic regions, tectonic environments, and instrument types. We manually classify each record for the presence of clipping and use the classified records. We then develop an artificial neural network model that combines all the individual algorithms. Testing on the holdout dataset, the standard deviation and histogram approaches are the most accurate individual algorithms, with an overall accuracy of about 93%. The combined artificial neural network method yields an overall accuracy of 95%, and the choice of classification threshold can balance precision and recall. |
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133 |
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0895-0695 |
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yes |
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8330 |
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Title |
Genomic characterisation of a novel species of Erysipelothrix associated with mortalities among endangered seabirds |
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Year |
2022 |
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Biorxive |
Abbreviated Journal |
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1151 |
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yes |
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8366 |
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Journal |
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Year |
2022 |
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Quaternary Science Reviews |
Abbreviated Journal |
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Volume |
283 |
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Pages |
107461 |
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Keywords |
Antarctic cold reversal Be CRE dating Cl CRE dating Glacier fluctuations Holocene Kerguelen islands Late glacial Paleoclimate Southern mid-latitudes Sub-Antarctic |
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1077 |
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0277-3791 |
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yes |
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8580 |
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Title |
Global maps of soil temperature |
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Journal |
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Year |
2022 |
Publication |
Global Change Biology |
Abbreviated Journal |
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Volume |
28 |
Issue |
9 |
Pages |
3110-3144 |
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Keywords |
bioclimatic variables global maps microclimate near-surface temperatures soil temperature soil-dwelling organisms temperature offset weather stations |
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136 |
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ISSN |
1365-2486 |
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yes |
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Call Number |
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Serial |
8368 |
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Author |
Jonathan Rae, Colin Forsyth, Malcolm Dunlop, Minna Palmroth, Mark Lester, Reiner Friedel, Geoff Reeves, Larry Kepko, Lucille Turc, Clare Watt, Wojciech Hajdas, Theodoros Sarris, Yoshifumi Saito, Ondrej Santolik, Yuri Shprits, Chi Wang, Aurelie Marchaudon, Matthieu Berthomier, Octav Marghitu, Benoit Hubert, Martin Volwerk, Elena A. Kronberg, Ian Mann, Kyle Murphy, David Miles, Zhonghua Yao, Andrew Fazakerley, Jasmine Sandhu, Hayley Allison, Quanqi Shi |
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Title |
What are the fundamental modes of energy transfer and partitioning in the coupled Magnetosphere-Ionosphere system? |
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Journal |
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Year |
2022 |
Publication |
Experimental Astronomy |
Abbreviated Journal |
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Volume |
54 |
Issue |
2 |
Pages |
391-426 |
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Keywords |
Earth Magnetosphere-Ionosphere coupling Space missions Voyage 2050 |
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312 |
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1572-9508 |
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yes |
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Serial |
8600 |
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Author |
Jordi Diaz |
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Title |
Atmosphere-solid earth coupling signals generated by the 15 January 2022 Hunga-Tonga eruption |
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Journal |
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Year |
2022 |
Publication |
Communications Earth & Environment |
Abbreviated Journal |
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Volume |
3 |
Issue |
1 |
Pages |
1-8 |
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Keywords |
Geophysics Natural hazards Seismology Volcanology |
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Abstract |
The January 15th 2022 eruption of the Hunga-Tonga volcano was associated to one of the highest energy volcanic explosions of the past few decades. Here we present a compilation of data from global seismic networks to explore three main topics: the time evolution of the eruption, the propagation of the atmospheric waves around the Earth and the low-frequency, long-lasting seismic signals worldwide after the main event. We find that the eruption started around 04:00, included two large explosions at 05:30 and 08:25 and produced atmospheric waves which circled the Earth more than two times during a time span of 3.5 days and were detected seismically. We also identify very low frequency signals, detected over several hours, which we interpret as resulting from the excitation of Earth normal modes. To our knowledge, there are no previous examples of atmospheric-solid Earth coupling over such a long time interval and only two examples of normal mode excitation following volcanic eruptions. |
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133 |
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2662-4435 |
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yes |
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8562 |
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Author |
Julia Maillard |
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2022 |
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1215 |
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yes |
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8508 |
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Title |
Modulation of Boundary-Layer Stability and the Surface Energy Budget by a Local Flow in Central Alaska |
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Year |
2022 |
Publication |
Boundary-Layer Meteorology |
Abbreviated Journal |
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Volume |
185 |
Issue |
3 |
Pages |
395-414 |
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Keywords |
High latitude Local flow Surface energy budget Surface temperature inversion Winter |
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1215 |
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ISSN |
1573-1472 |
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yes |
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Serial |
8501 |
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Title |
Reviews and syntheses: A framework to observe, understand and project ecosystem response to environmental change in the East Antarctic Southern Ocean |
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Journal |
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Year |
2022 |
Publication |
Biogeosciences |
Abbreviated Journal |
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Volume |
19 |
Issue |
22 |
Pages |
5313-5342 |
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Abstract |
Systematic long-term studies on ecosystem dynamics are largely lacking from the East Antarctic Southern Ocean, although it is well recognized that they are indispensable to identify the ecological impacts and risks of environmental change. Here, we present a framework for establishing a long-term cross-disciplinary study on decadal timescales. We argue that the eastern Weddell Sea and the adjacent sea to the east, off Dronning Maud Land, is a particularly well suited area for such a study, since it is based on findings from previous expeditions to this region. Moreover, since climate and environmental change have so far been comparatively muted in this area, as in the eastern Antarctic in general, a systematic long-term study of its environmental and ecological state can provide a baseline of the current situation, which will be important for an assessment of future changes from their very onset, with consistent and comparable time series data underpinning and testing models and their projections. By establishing an Integrated East Antarctic Marine Research (IEAMaR) observatory, long-term changes in ocean dynamics, geochemistry, biodiversity, and ecosystem functions and services will be systematically explored and mapped through regular autonomous and ship-based synoptic surveys. An associated long-term ecological research (LTER) programme, including experimental and modelling work, will allow for studying climate-driven ecosystem changes and interactions with impacts arising from other anthropogenic activities. This integrative approach will provide a level of long-term data availability and ecosystem understanding that are imperative to determine, understand, and project the consequences of climate change and support a sound science-informed management of future conservation efforts in the Southern Ocean. |
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137 |
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ISSN |
1726-4170 |
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yes |
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Call Number |
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8686 |
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