| Records |
| Author |
Chengbin Peng, Carlos M. Duarte, Daniel P. Costa, Christophe Guinet, Robert G. Harcourt, Mark A. Hindell, Clive R. McMahon, Monica Muelbert, Michele Thums, Ka-Chun Wong, Xiangliang Zhang |
| Title |
Deep Learning Resolves Representative Movement Patterns in a Marine Predator Species |
Type |
Journal |
| Year |
2019 |
Publication |
Applied Sciences |
Abbreviated Journal |
|
| Volume |
9 |
Issue |
14 |
Pages |
2935 |
| Keywords |
marine animal movement analysis recurrent neural networks representative patterns |
| Abstract |
The analysis of animal movement from telemetry data provides insights into how and why animals move. While traditional approaches to such analysis mostly focus on predicting animal states during movement, we describe an approach that allows us to identify representative movement patterns of different animal groups. To do this, we propose a carefully designed recurrent neural network and combine it with telemetry data for automatic feature extraction and identification of non-predefined representative patterns. In the experiment, we consider a particular marine predator species, the southern elephant seal, as an example. With our approach, we identify that the male seals in our data set share similar movement patterns when they are close to land. We identify this pattern recurring in a number of distant locations, consistent with alternative approaches from previous research. |
| Programme |
1201 |
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Edition |
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| ISSN |
2076-3417 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8772 |
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| Author |
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| Title |
Theoretical and Experimental Analysis for Cleaning Ice Cores from EstisolTM 140 Drill Liquid |
Type |
Journal |
| Year |
2021 |
Publication |
Applied Sciences |
Abbreviated Journal |
|
| Volume |
11 |
Issue |
9 |
Pages |
3830 |
| Keywords |
Beyond EPICA drilling Estisol ice cores |
| Abstract |
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| Programme |
1202 |
| Campaign |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8247 |
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| Author |
Karl-Ludwig Klein |
| Title |
Radio Astronomical Tools for the Study of Solar Energetic Particles II.Time-Extended Acceleration at Subrelativistic and Relativistic Energies |
Type |
Journal |
| Year |
2021 |
Publication |
Frontiers in Astronomy and Space Sciences |
Abbreviated Journal |
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| Volume |
7 |
Issue |
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Pages |
93 |
| Keywords |
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| Abstract |
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| Programme |
227 |
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| ISSN |
2296-987X |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7777 |
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| Author |
Karl-Ludwig Klein |
| Title |
Radio Astronomical Tools for the Study of Solar Energetic Particles I. Correlations and Diagnostics of Impulsive Acceleration and Particle Propagation |
Type |
Journal |
| Year |
2021 |
Publication |
Frontiers in Astronomy and Space Sciences |
Abbreviated Journal |
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| Volume |
7 |
Issue |
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Pages |
105 |
| Keywords |
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| Abstract |
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| Programme |
227 |
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| ISSN |
2296-987X |
ISBN |
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Expedition |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6775 |
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| Author |
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| Title |
Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
Type |
Journal |
| Year |
2022 |
Publication |
Frontiers in Soil Science |
Abbreviated Journal |
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| Volume |
2 |
Issue |
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Pages |
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| Keywords |
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| Abstract |
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| Programme |
1116 |
| Campaign |
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| Series Editor |
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Series Issue |
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Edition |
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| ISSN |
2673-8619 |
ISBN |
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Medium |
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| Area |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8492 |
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| Author |
Tignat-Perrier, R., Vogel, T. M., Técher, N., Larose, C., and Dommergue, A. |
| Title |
Microorganisms Floating Through the Air |
Type |
Journal |
| Year |
2022 |
Publication |
Frontiers for young minds |
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 |
Would you believe us if we told you that, when you breathe in, you inhale thousands of microorganisms with every breath. Although this might sound scary, be assured that they are safe for your health. These airborne microorganisms, too small to see with the naked eye, consist of many different species. Who are they? Where do they come from? What do they do in the air? These are some of the questions that we answer in this article, although many questions about airborne microorganisms remain to be explored. |
| Programme |
1028 |
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Expedition |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8407 |
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| Author |
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| Title |
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Type |
Journal |
| Year |
2022 |
Publication |
Frontiers in physiology |
Abbreviated Journal |
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| Volume |
13 |
Issue |
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Pages |
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| Keywords |
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| Abstract |
Laboratory investigations on terrestrial model-species, typically of temperate origin, have demonstrated that terrestrial ectotherms can cope with daily temperature variations through rapid hardening responses. However, few studies have investigated this ability and its physiological basis in the field. Especially in polar regions, where the temporal and spatial temperature variations can be extreme, are hardening responses expected to be important. Here, we examined diurnal adjustments in heat and cold tolerance in the Greenlandic seed bug Nysius groenlandicus by collecting individuals for thermal assessment at different time points within and across days. We found a significant correlation between observed heat or cold tolerance and the ambient microhabitat temperatures at the time of capture, indicating that N. groenlandicus continuously and within short time-windows respond physiologically to thermal changes and/or other environmental variables in their microhabitats. Secondly, we assessed underlying metabolomic fingerprints using GC-MS metabolomics in a subset of individuals collected during days with either low or high temperature variation. Concentrations of metabolites, including sugars, polyols, and free amino acids varied significantly with time of collection. For instance, we detected elevated sugar levels in animals caught at the lowest daily field temperatures. Polyol concentrations were lower in individuals collected in the morning and evening and higher at midday and afternoon, possibly reflecting changes in temperature. Additionally, changes in concentrations of metabolites associated with energetic metabolism were observed across collection times. Our findings suggest that in these extreme polar environments hardening responses are marked and likely play a crucial role for coping with microhabitat temperature variation on a daily scale, and that metabolite levels are actively altered on a daily basis. |
| Programme |
136 |
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Edition |
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| ISSN |
1664-042X |
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Expedition |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8479 |
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| Author |
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| Title |
Exploring the Microdiversity Within Marine Bacterial Taxa: Toward an Integrated Biogeography in the Southern Ocean |
Type |
Journal |
| Year |
2021 |
Publication |
Frontiers in Microbiology |
Abbreviated Journal |
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| Volume |
12 |
Issue |
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Pages |
1985 |
| Keywords |
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| Abstract |
Most of the microbial biogeographic patterns in the oceans have been depicted at the whole community level, leaving out finer taxonomic resolution (i.e., microdiversity) that is crucial to conduct intra-population phylogeographic study, as commonly done for macroorganisms. Here, we present a new approach to unravel the bacterial phylogeographic patterns combining community-wide survey by 16S rRNA gene metabarcoding and intra-species resolution through the oligotyping method, allowing robust estimations of genetic and phylogeographic indices, and migration parameters. As a proof-of-concept, we focused on the bacterial genus Spirochaeta across three distant biogeographic provinces of the Southern Ocean; maritime Antarctica, sub-Antarctic Islands, and Patagonia. Each targeted Spirochaeta operational taxonomic units were characterized by a substantial intrapopulation microdiversity, and significant genetic differentiation and phylogeographic structure among the three provinces. Gene flow estimations among Spirochaeta populations support the role of the Antarctic Polar Front as a biogeographic barrier to bacterial dispersal between Antarctic and sub-Antarctic provinces. Conversely, the Antarctic Circumpolar Current appears as the main driver of gene flow, connecting sub-Antarctic Islands with Patagonia and maritime Antarctica. Additionally, historical processes (drift and dispersal limitation) govern up to 86% of the spatial turnover among Spirochaeta populations. Overall, our approach bridges the gap between microbial and macrobial ecology by revealing strong congruency with macroorganisms distribution patterns at the populational level, shaped by the same oceanographic structures and ecological processes. |
| Programme |
1044 |
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Place of Publication |
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Summary Language |
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Original Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
1664-302X |
ISBN |
1664-302X |
Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6457 |
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| Author |
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| Title |
Over Winter Microbial Processes in a Svalbard Snow Pack: An Experimental Approach |
Type |
Journal |
| Year |
2020 |
Publication |
Frontiers in Microbiology |
Abbreviated Journal |
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| Volume |
11 |
Issue |
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Pages |
1029 |
| Keywords |
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| Abstract |
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| Programme |
1192 |
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Place of Publication |
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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 |
1664-302X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7965 |
| Permanent link to this record |
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| Author |
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| Title |
Do Organic Substrates Drive Microbial Community Interactions in Arctic Snow? |
Type |
Journal |
| Year |
2019 |
Publication |
Frontiers in Microbiology |
Abbreviated Journal |
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| Volume |
10 |
Issue |
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Pages |
2492 |
| Keywords |
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| Abstract |
The effect of nutrients on microbial interactions, including competition and collaboration, has mainly been studied in laboratories, but their potential application to complex ecosystems is unknown. Here, we examined the effect of changes in organic acids among other parameters on snow microbial communities in situ over 2 months. We compared snow bacterial communities from a low organic acid content period to that from a higher organic acid period. We hypothesized that an increase in organic acids would shift the dominant microbial interaction from collaboration to competition. To evaluate microbial interactions, we built taxonomic co-variance networks from OTUs obtained from 16S rRNA gene sequencing. In addition, we tracked marker genes of microbial cooperation (plasmid backbone genes) and competition (antibiotic resistance genes) across both sampling periods in metagenomes and metatranscriptomes. Our results showed a decrease in the average connectivity of the network during late spring compared to the early spring that we interpreted as a decrease of cooperation. This observation was strengthened by the significantly more abundant plasmid backbone genes in the metagenomes from the early spring. The modularity of the network from the late spring was also found to be higher than the one from the early spring, which is another possible indicator of increased competition. Antibiotic resistance genes were significantly more abundant in the late spring metagenomes. In addition, antibiotic resistance genes were also positively correlated to the organic acid concentration of the snow across both seasons. Snow organic acid content might be responsible for this change in bacterial interactions in the Arctic snow community. |
| Programme |
1192 |
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Place of Publication |
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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 |
1664-302X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7966 |
| Permanent link to this record |
