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Title |
Individual-based model of population dynamics in a sea urchin of the Kerguelen Plateau (Southern Ocean), Abatus cordatus, under changing environmental conditions |
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Year |
2021 |
Publication |
Ecological Modelling |
Abbreviated Journal |
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Volume |
440 |
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Pages |
109352 |
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Keywords |
Climate change Dynamic energy budget Ecological modelling Endemic echinoderm Individual-based model Kerguelen Model sensitivity |
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1044 |
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0304-3800 |
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yes |
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8002 |
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Author |
Anzhou Cao, Zheng Guo, Xiaoyu Qi, Peiliang Li, Hailun He |
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Title |
Seasonal and nodal variations of predominant tidal constituents in the global ocean |
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Journal |
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Year |
2021 |
Publication |
Continental Shelf Research |
Abbreviated Journal |
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Volume |
217 |
Issue |
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Pages |
104372 |
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Keywords |
Fitting Modified two-step harmonic analysis Nodal modulation Seasonal variation Tide gauge Tides |
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Abstract |
Tides are one of the basic types of ocean water motions. Previous studies have reported that the M2 constituent exhibits seasonal variations (annual cycles) in some regions. However, based on the newly proposed method of modified two-step harmonic analysis (HA) and its application at 240 global tide gauges, we find that the M2 constituent as well as the S2 and K1 do not have significant seasonal variations at these tide gauges. The seasonal variations of the M2 constituent reported in previous studies are caused by its satellites, the H1 and H2 constituents, which are not resolved in these studies due to the short time window (one month or three months) used in HA. Because the frequency of the H1 (H2) constituent is equal to that of the M2 minus (plus) the frequency of annual cycles, the superposition of the M2, H1 and H2 constituents with constant amplitudes is equivalent to the M2 constituent with seasonally varying amplitudes. Compared with the new method, some adaptations to traditional HA aiming to capture variations in amplitudes and phase lags of constituents have some limitations, because they either neglect some satellites of the major constitutes or introduce spurious fluctuations resulting from an unreasonably large number of independent points. The nodal modulations of predominant constituents are also explored in this study. On the global scale, the nodal modulations of the M2, K1 and O1 constituents agree with the theoretical predictions, except a cold spot region with reduced nodal modulation in the Gulf of Maine and a hot spot region with enhanced nodal modulation in the South China Sea for the M2. Nodal modulation is also found for the S2 constituent (in theory, the S2 has no nodal modulation), which is 0.8% averaged at 164 tide gauges where the S2 is not too weak. |
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688 |
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0278-4343 |
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yes |
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8032 |
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Author |
R. Olmi, M. Bittelli, G. Picard, L. Arnaud, A. Mialon, S. Priori |
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Title |
Investigating the influence of the grain size and distribution on the macroscopic dielectric properties of Antarctic firn |
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Year |
2021 |
Publication |
Cold Regions Science and Technology |
Abbreviated Journal |
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Volume |
185 |
Issue |
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Pages |
103254 |
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Keywords |
Antarctica Close?off Dielectric measurements Dielectric model Firn Full wave EM simulations Ice cores |
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1110 |
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ISSN |
0165-232X |
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yes |
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Serial |
7995 |
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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 |
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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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Programme |
109 |
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0045-6535 |
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yes |
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8084 |
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Title |
First description of nest-decoration behaviour in a wild sub-Antarctic shorebird |
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Year |
2021 |
Publication |
Behavioural Processes |
Abbreviated Journal |
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Volume |
188 |
Issue |
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Pages |
104408 |
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Keywords |
Animal communication Extended phenotype Nest decoration Non-bodily ornament Signal |
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Abstract |
A wide range of animal species accumulate objects in, on, and/or around structures they build. Sometimes, these accumulations serve specific functions (e.g. structural or isolating features) or are purely incidental, while in other cases the materials are deliberately displayed to serve signalling purposes (extended phenotype signals). In this pilot study, we employed systematic in situ observations and camera trapping to describe for the first time that both partners of a territorial shorebird, the black-faced sheathbill (Chionis minor ssp minor) collect, carry, and arrange colourful marine shells and dry twigs within and around their nest cavity. Our observations expand the taxonomic breadth of avian extended phenotype signals, by showing that at least one species within a largely understudied group i.e., Charadriiformes, exhibits nest-decoration behaviour. Multiple manipulative experiments are needed to explore further the signalling function of these decorations, which opens new exciting avenues for animal communication and cognition research. |
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354 |
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0376-6357 |
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yes |
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Serial |
7953 |
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Title |
Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
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Year |
2021 |
Publication |
Atmospheric Environment |
Abbreviated Journal |
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Volume |
262 |
Issue |
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Pages |
118634 |
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Keywords |
Atmospheric conditions High resolution sampling Snow scavenging factor Snow sublimation |
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1028 |
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ISSN |
1352-2310 |
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yes |
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Serial |
8057 |
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Title |
Exploring the interplay between nest vocalizations and foraging behaviour in breeding birds |
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Journal |
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Year |
2021 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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Volume |
180 |
Issue |
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Pages |
375-391 |
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Keywords |
bird communication foraging behaviour reproductive partner vocalization |
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Abstract |
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Programme |
1091 |
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0003-3472 |
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yes |
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Serial |
8760 |
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Title |
Incisor microwear of Arctic rodents as a proxy for microhabitat preference |
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Journal |
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Year |
2021 |
Publication |
Mammalian Biology |
Abbreviated Journal |
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Volume |
101 |
Issue |
6 |
Pages |
1033-1052 |
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Keywords |
Arctic Environment Habitats Narrow-headed vole Russia Siberian lemming Tooth wear Tundra Yamal Peninsula |
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Abstract |
Changing environmental conditions in the Arctic make it important to document and understand habitat preferences and flexibility of vulnerable high-latitude mammals. Indirect proxies are especially useful for elusive species, such as rodents. This study explores incisor microwear as an indicator of variation in behavior and microhabitat use in Siberian lemmings (Lemmus sibiricus) and narrow-headed voles (Lasiopodomys gregalis) from the Yamal Peninsula, Russia. Fifty-nine individuals were sampled at four sites along a latitudinal gradient from forest-tundra ecotone to high-Arctic tundra. Lemmings are present at the northernmost site, voles at the southernmost site, and both species at the middle two. Lemmus sibiricus prefers wet, mossy lowland, whereas La. gregalis favors drier thickets and more open microhabitats and burrows underground. Feature-based analyses indicate higher densities of features and more uniformly oriented striations for voles than lemmings at sites with both species. The species also differ significantly in microwear texture attributes suggesting larger features for lemmings, and smaller ones, but more of them, for voles. While no texture differences were found between sites within species, voles from sites with open tundra have higher striation densities than those from the forest-tundra ecotone. Furthermore, lemmings from open tundra sites have higher striation densities than those from the water-saturated, moss-covered northernmost site. While microhabitat preferences and burrowing by voles likely contribute to differences between species, variation within seems to reflect habitat variation given differences in abrasive loads between sites. This suggests that incisor microwear patterning can be used to track microhabitat differences among Arctic rodent populations. |
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1036 |
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1618-1476 |
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yes |
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8377 |
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Author |
Alexandra Lavrillier, Semen Gabyshev |
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Title |
An Indigenous science of the climate change impacts on landscape topography in Siberia |
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Year |
2021 |
Publication |
Ambio |
Abbreviated Journal |
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Volume |
50 |
Issue |
11 |
Pages |
1910-1925 |
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1127 |
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ISSN |
1654-7209 |
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yes |
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7627 |
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Author |
Yves Cherel |
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Title |
?Mastigoteuthis B Clarke, 1980, is a junior synonym of Asperoteuthis acanthoderma (Lu, 1977) (Cephalopoda, Oegopsida, Chiroteuthidae), a rare cosmopolitan deep-sea squid |
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Year |
2021 |
Publication |
Marine Biodiversity |
Abbreviated Journal |
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Volume |
51 |
Issue |
1 |
Pages |
14 |
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Abstract |
The present work resolved the long-standing taxonomic problem associated with the enigmatic ?Mastigoteuthis B Clarke, 1980, by demonstrating that these lower beaks correspond to those of the large deep-sea chiroteuthid Asperoteuthis acanthoderma (Lu, 1977). A review of the existing literature listed 22 specimens of A. acanthoderma, but synonymizing ?Mastigoteuthis B with A. acanthoderma increased 14 times the species record worldwide. Pooling the data from both specimens and beaks (a total of 329 individuals) indicates that the species has a circumglobal distribution, since it occurs in tropical and subtropical waters of the Atlantic, Indian and Pacific Oceans. The synonymization also highlights trophic relationships of the species as a prey of top marine predators. Lower beaks of A. acanthoderma were mostly found in stomachs of sperm whales, but a few beaks were also recorded from stomach contents of sharks, swordfish and the wandering albatross. |
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109 |
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ISSN |
1867-1624 |
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yes |
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Call Number |
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Serial |
8208 |
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