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Title |
Behavioural responses of breeding arctic sandpipers to ground-surface temperature and primary productivity |
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Journal |
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Year |
2021 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
755 |
Issue |
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Pages |
142485 |
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Keywords  |
Environmental conditions Incubation behaviour Incubation recesses Incubation strategy Lag effects NDVI Shorebird |
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Abstract |
Most birds incubate their eggs, which requires time and energy at the expense of other activities. Birds generally have two incubation strategies: biparental where both mates cooperate in incubating eggs, and uniparental where a single parent incubates. In harsh and unpredictable environments, incubation is challenging due to high energetic demands and variable resource availability. We studied the relationships between the incubation behaviour of sandpipers (genus Calidris) and two environmental variables: temperature and a proxy of primary productivity (i.e. NDVI). We investigated how these relationships vary between incubation strategies and across species among strategies. We also studied how the relationship between current temperature and incubation behaviour varies with previous day's temperature. We monitored the incubation behaviour of nine sandpiper species using thermologgers at 15 arctic sites between 2016 and 2019. We also used thermologgers to record the ground surface temperature at conspecific nest sites and extracted NDVI values from a remote sensing product. We found no relationship between either environmental variables and biparental incubation behaviour. Conversely, as ground-surface temperature increased, uniparental species decreased total duration of recesses (TDR) and mean duration of recesses (MDR), but increased number of recesses (NR). Moreover, small species showed stronger relationships with ground-surface temperature than large species. When all uniparental species were combined, an increase in NDVI was correlated with higher mean duration, total duration and number of recesses, but relationships varied widely across species. Finally, some uniparental species showed a lag effect with a higher nest attentiveness after a warm day while more recesses occurred after a cold day than was predicted based on current temperatures. We demonstrate the complex interplay between shorebird incubation strategies, incubation behaviour, and environmental conditions. Understanding how species respond to changes in their environment during incubation helps predict their future reproductive success. |
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1036 |
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0048-9697 |
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yes |
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7553 |
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Author |
N. Aubone, M. Saraceno, M. L. Torres Alberto, J. Campagna, L. Le Ster, B. Picard, M. Hindell, C. Campagna, C. R. Guinet |
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Title |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
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Journal |
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Year |
2021 |
Publication |
Journal of Marine Systems |
Abbreviated Journal |
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Volume |
223 |
Issue |
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Pages |
103612 |
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Keywords |
Elephant seals Malvinas current Patagonian shelf slope Southwestern Atlantic Ocean |
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1201 |
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0924-7963 |
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yes |
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8771 |
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Title |
Non-English languages enrich scientific knowledge: The example of economic costs of biological invasions |
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Year |
2021 |
Publication |
Science of The Total Environment |
Abbreviated Journal |
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Volume |
775 |
Issue |
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Pages |
144441 |
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Keywords |
Ecological bias InvaCost Knowledge gaps Management Native languages Stakeholders |
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136 |
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0048-9697 |
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yes |
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7973 |
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Author |
Morten Frederiksen, Olivier Gilg, Glenn Yannic |
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Title |
Cross-icecap spring migration confirmed in a high-Arctic seabird, the Ivory Gull Pagophila eburnea |
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Journal |
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Year |
2021 |
Publication |
Ibis |
Abbreviated Journal |
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Volume |
163 |
Issue |
2 |
Pages |
706-714 |
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Keywords |
ecological barrier Greenland icecap high-altitude migration |
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Programme |
1210 |
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ISSN |
0019-1019 |
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yes |
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6348 |
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Title |
Echo occurrence in the southern polar ionosphere for the SuperDARN Dome C East and Dome C North radars |
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Journal |
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Year |
2021 |
Publication |
Polar Science |
Abbreviated Journal |
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Volume |
28 |
Issue |
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Pages |
100684 |
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Keywords |
Echo occurrence IRI model Polar cap radars Ray-tracing |
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Abstract |
In this paper, echo occurrence rates for the Dome C East (DCE) and the new Dome C North (DCN) radars are studied. We report the ionospheric and ground scatter echo occurrence rates for selected periods around equinoxes and solstices in the final part of the solar cycle XXIV. The occurrence maps built in Altitude Adjusted Corrected Geomagnetic latitude and Magnetic Local Time coordinates show peculiar patterns highly variable with season. The comparisons of the radar observations with the International Reference Ionosphere model electron density and with ray tracing simulations allow us to explain the major features of observed patterns in terms of electron density variations. The study shows the great potential of the DCE and DCN radar combination to the Super Dual Auroral Radar Network (SuperDARN) convection mapping in terms of monitoring key regions of the high-latitude ionosphere critical for understanding of the magnetospheric dynamics. |
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312 |
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ISSN |
1873-9652 |
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yes |
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Call Number |
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Serial |
8020 |
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Author |
Ryo Okuwaki, Stephen P. Hicks, Timothy J. Craig, Wenyuan Fan, Saskia Goes, Tim J. Wright, Yuji Yagi |
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Title |
Illuminating a Contorted Slab With a Complex Intraslab Rupture Evolution During the 2021 Mw 7.3 East Cape, New Zealand Earthquake |
Type |
Journal |
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Year |
2021 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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Volume |
48 |
Issue |
24 |
Pages |
e2021GL095117 |
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Keywords |
earthquake rupture finite-fault inversion Hikurangi intraslab earthquakes slab geometry source imaging |
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Abstract |
The state-of-stress within subducting oceanic plates controls rupture processes of deep intraslab earthquakes. However, little is known about how the large-scale plate geometry and the stress regime relate to the physical nature of the deep intraslab earthquakes. Here we find, by using globally and locally observed seismic records, that the moment magnitude 7.3 2021 East Cape, New Zealand earthquake was driven by a combination of shallow trench-normal extension and unexpectedly, deep trench-parallel compression. We find multiple rupture episodes comprising a mixture of reverse, strike-slip, and normal faulting. Reverse faulting due to the trench-parallel compression is unexpected given the apparent subduction direction, so we require a differential buoyancy-driven stress rotation, which contorts the slab near the edge of the Hikurangi plateau. Our finding highlights that buoyant features in subducting plates may cause diverse rupture behavior of intraslab earthquakes due to the resulting heterogeneous stress state within slabs. |
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133 |
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ISSN |
1944-8007 |
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yes |
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Call Number |
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Serial |
8313 |
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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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Programme |
109 |
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ISSN |
1461-0248 |
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yes |
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Serial |
8418 |
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Author |
Marina Renedo, Zoyne Pedrero, David Amouroux, Yves Cherel, Paco Bustamante |
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Title |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
Type |
Journal |
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Year |
2021 |
Publication |
Chemosphere |
Abbreviated Journal |
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Volume |
263 |
Issue |
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Pages |
127777 |
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Keywords |
Demethylation Detoxification Metabolism Methylmercury Moult |
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Abstract |
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Programme |
109 |
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ISSN |
0045-6535 |
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yes |
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Serial |
8084 |
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Title |
Evolution of the Cook Ice Cap (Kerguelen Islands) between the last centuries and 2100 ce based on cosmogenic dating and glacio-climatic modelling |
Type |
Journal |
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Year |
2021 |
Publication |
Antarctic Science |
Abbreviated Journal |
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Volume |
33 |
Issue |
3 |
Pages |
301-317 |
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Keywords |
degree-day glaciological model future projections glacial fluctuations in situ cosmogenic chlorine-36 dating moraines sub-Antarctic islands |
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Abstract |
The Cook Ice Cap (CIC) on the sub-Antarctic Kerguelen Islands recently experienced extremely negative surface mass balance. Further deglaciation could have important impacts on endemic and invasive fauna and flora. To put this exceptional glacier evolution into a multi-centennial-scale context, we refined the evolution of the CIC over the last millennium, investigated the associated climate conditions and explored its potential evolution by 2100 ce. A glaciological model, constrained by cosmic ray exposure dating of moraines, historical documents and recent direct mass balance observations, was used to simulate the ice-cap extents during different phases of advance and retreat between the last millennium and 2100 ce. Cosmogenic dating suggests glacial advance around the early Little Ice Age (LIA), consistent with findings from other sub-Antarctic studies, and the rather cold and humid conditions brought about by the negative phase of the Southern Annular Mode (SAM). This study contributes to our currently limited understanding of palaeoclimate for the early LIA in the southern Indian Ocean. Glaciological modelling and observations confirm the recent decrease in CIC extent linked to the intensification of the SAM. Although affected by large uncertainties, future simulations suggest a complete disappearance of CIC by the end of the century. |
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1048 |
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ISSN |
0954-1020, 1365-2079 |
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yes |
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8187 |
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Title |
Constraining 20th-Century Sea-Level Rise in the South Atlantic Ocean |
Type |
Journal |
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Year |
2021 |
Publication |
Journal of Geophysical Research: Oceans |
Abbreviated Journal |
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Volume |
126 |
Issue |
3 |
Pages |
e2020JC016970 |
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Keywords |
data rescue salt-marsh proxies sea-level changes South Atlantic tide gauges |
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Abstract |
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688 |
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2169-9291 |
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yes |
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Call Number |
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8603 |
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