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Armelle Poisson, Thierry Boulinier, Laure Bournez, Gaëlle Gonzalez, Camille V. Migné, Sara Moutailler, Bruno Faivre, Raphaëlle Métras |
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Title |
Tick-borne zoonotic flaviviruses and Borrelia infections in wildlife hosts: What have field studies contributed? |
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Journal |
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Year |
2024 |
Publication |
One Health |
Abbreviated Journal |
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Volume |
18 |
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Pages |
100747 |
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Keywords  |
Flavivirus Host Reservoir Sentinel Tick-borne diseases Wildlife |
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Abstract |
Tick-borne flaviviruses and Borrelia spp. are globally spread pathogens of zoonotic potential that are maintained by a transmission cycle at the interface between ticks and vertebrate hosts, mainly wild animals. Aside data on pathogen burden in ticks, information on the status of various hosts relative to infection is important to acquire. We reviewed how those infections have been studied in wildlife host species in the field to discuss how collected data provided relevant epidemiological information and to identify needs for further studies. The literature was screened for observational studies on pathogen or antibody detection for tick-borne Borrelia spp. and flaviviruses in wildlife host animals. Overall, Borrelia spp. were more studied (73% of case studies, representing 297 host species) than flaviviruses (27% of case studies, representing 114 host species). Studies on both Borrelia spp. and flaviviruses focused mainly on the same species, namely bank vole and yellow-necked mouse. Most studies were order-specific and cross-sectional, reporting prevalence at various locations, but with little insight into the underlying epidemiological dynamics. Host species with potential to act as reservoir hosts of these pathogens were neglected, notably birds. We highlight the necessity of collecting both demographics and infection data in wildlife studies, and to consider communities of species, to better estimate zoonotic risk potential in the One Health context. |
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1151 |
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2352-7714 |
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yes |
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8779 |
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Kai Bischof, Peter Convey, Pedro Duarte, Jean-Pierre Gattuso, Maria Granberg, Haakon Hop, Clara Hoppe, Carlos Jiménez, Leonid Lisitsyn, Brezo Martinez, Michael Y. Roleda, Peter Thor, Józef M. Wiktor, Geir Wing Gabrielsen |
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Title |
Kongsfjorden as Harbinger of the Future Arctic: Knowns, Unknowns and Research Priorities |
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Book |
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Year |
2019 |
Publication |
The Ecosystem of Kongsfjorden, Svalbard |
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Pages |
537-562 |
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Keywords |
Flagship program Indicator species Land-sea-ocean-interaction Monitoring Pan-Arctic |
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Abstract |
Due to its year-round accessibility and excellent on-site infrastructure, Kongsfjorden and the Ny-Ålesund Research and Monitoring Facility have become established as a primary location to study the impact of environmental change on Arctic coastal ecosystems. Due to its location right at the interface of Arctic and Atlantic oceanic regimes, Kongsfjorden already experiences large amplitudes of variability in physico/chemical conditions and might, thus, be considered as an early warning indicator of future changes, which can then be extrapolated in a pan-Arctic perspective. Already now, Kongsfjorden represents one of the best-studied Arctic fjord systems. However, research conducted to date has concentrated largely on small disciplinary projects, prompting the need for a higher level of integration of future research activities. This contribution, thus, aims at identifying gaps in knowledge and research priorities with respect to ecological and adaptive responses to Arctic ecosystem changes. By doing so we aim to provide a stimulus for the initiation of new international and interdisciplinary research initiatives. |
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1141 |
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978-3-319-46425-1 |
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978-3-319-46425-1 |
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yes |
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7489 |
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Stéphanie Jenouvrier, Lise Aubry, Silke van Daalen, Christophe Barbraud, Henri Weimerskirch, Hal Caswell |
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Title |
When the going gets tough, the tough get going: Effect of extreme climate on an Antarctic seabird's life history |
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Year |
2022 |
Publication |
Ecology Letters |
Abbreviated Journal |
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Volume |
25 |
Issue |
10 |
Pages |
2120-2131 |
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Keywords |
fixed heterogeneity frailty individual quality individual stochasticity SICs unobserved individual heterogeneity |
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Abstract |
Individuals differ in many ways. Most produce few offspring; a handful produce many. Some die early; others live to old age. It is tempting to attribute these differences in outcomes to differences in individual traits, and thus in the demographic rates experienced. However, there is more to individual variation than meets the eye of the biologist. Even among individuals sharing identical traits, life history outcomes (life expectancy and lifetime reproduction) will vary due to individual stochasticity, that is to chance. Quantifying the contributions of heterogeneity and chance is essential to understand natural variability. Interindividual differences vary across environmental conditions, hence heterogeneity and stochasticity depend on environmental conditions. We show that favourable conditions increase the contributions of individual stochasticity, and reduce the contributions of heterogeneity, to variance in demographic outcomes in a seabird population. The opposite is true under poor conditions. This result has important consequence for understanding the ecology and evolution of life history strategies. |
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109 |
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1461-0248 |
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yes |
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8601 |
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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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Alberto Baudena, Enrico Ser-Giacomi, Donatella D’Onofrio, Xavier Capet, Cedric Cotté, Yves Cherel, Francesco D’Ovidio |
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Title |
Fine-scale structures as spots of increased fish concentration in the open ocean |
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Year |
2021 |
Publication |
Scientific Reports |
Abbreviated Journal |
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Volume |
11 |
Issue |
1 |
Pages |
15805 |
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Keywords |
Fisheries Marine biology Physical oceanography |
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Abstract |
Oceanic frontal zones have been shown to deeply influence the distribution of primary producers and, at the other extreme of the trophic web, top predators. However, the relationship between these structures and intermediate trophic levels is much more obscure. In this paper we address this knowledge gap by comparing acoustic measurements of mesopelagic fish concentrations to satellite-derived fine-scale Lagrangian Coherent Structures in the Indian sector of the Southern Ocean. First, we demonstrate that higher fish concentrations occur more frequently in correspondence with strong Lagrangian Coherent Structures. Secondly, we illustrate that, while increased fish densities are more likely to be observed over these structures, the presence of a fine-scale feature does not imply a concomitant fish accumulation, as other factors affect fish distribution. Thirdly, we show that, when only chlorophyll-rich waters are considered, front intensity modulates significantly more the local fish concentration. Finally, we discuss a model representing fish movement along Lagrangian features, specifically built for mid-trophic levels. Its results, obtained with realistic parameters, are qualitatively consistent with the observations and the spatio-temporal scales analysed. Overall, these findings may help to integrate intermediate trophic levels in trophic models, which can ultimately support management and conservation policies. |
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109 |
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2045-2322 |
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yes |
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8384 |
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Koubbi, P.; Duhamel, G.; Hecq, J.-H.; Beans, C.; Loots, C.; Pruvost, P.; Tavernier, E.; Vacchi, M.; Vallet, C. |
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Title |
Ichthyoplankton in the neritic and coastal zone of Antarctica and Subantarctic islands: A review |
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Journal Article |
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Year |
2009 |
Publication |
Journal of Marine Systems |
Abbreviated Journal |
Revisiting the Role of Zooplankton in Pelagic Ecosystems |
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78 |
Issue |
4 |
Pages |
547-556 |
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Keywords |
Fish larvae; Southern Ocean; Match-mismatch; Distribution; Life cycle |
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Abstract |
Since the article published by Loeb et al. [Loeb, V.J., Kellermann, A., Koubbi, P., North, A.W., White, M., 1993. Antarctic larval fish assemblages: a review. Bull. Mar. Sci. 53(2), 416-449.] about Antarctic ichthyoplankton, many surveys were carried out in different sectors of the Southern Ocean focusing on different aspects of the ecology of fish larvae. Some of these researches were conducted in the Subantarctic Kerguelen Islands and others on the continental shelf off Terre Adlie and Georges V land. Oceanographic and geographic features influence fish larvae ecology such as island mass effects, gyres, canyons. Antarctic fishes show also temporal segregation of spawning which induces temporal succession of early stage larvae. This avoids competition and probably the predation on early stages for species having few recruits. In that case, we have to understand how these larvae can deal with the match-mismatch with their preys and how they find sufficient food to survive. But our knowledge on Antarctic fish larvae is still insufficient as we do not know larvae for quite a lot of species and because of the difficulty to sample during winter. |
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1142 |
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0924-7963 |
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yes |
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IPEV @ Thierry.Lemaire @ |
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6051 |
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Author |
Yves Cherel, Pierrick Bocher |
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Title |
Diet of the soft-plumaged petrel (Pterodroma mollis) at Kerguelen Islands and a review of the food of gadfly petrels (Pterodroma spp.) worldwide |
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Journal |
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Year |
2022 |
Publication |
Marine Biology |
Abbreviated Journal |
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Volume |
169 |
Issue |
2 |
Pages |
31 |
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Keywords |
Fish Food Myctophidae Procellariiformes Seabirds Southern Ocean Squid Tropics |
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Abstract |
Little is known on the food and feeding ecology of the soft-plumaged petrel Pterodroma mollis, which is the single gadfly petrel Pterodroma spp. with a circumpolar breeding distribution within the Southern Ocean. Our primary goal was to describe its diet at Kerguelen Islands, which is the southernmost breeding locality of the species. Soft-plumaged petrels fed on fish (71% by mass), and secondarily on crustaceans (22%), while cephalopods (7%) and other items (< 1%) were minor dietary components. Eight-hundred and sixty prey were identified from the pooled 33 food samples, with the 2 hyperiid amphipods Cyllopus magellanicus (48%) and Themisto gaudichaudii (35%) being the main food items by number. Owing to their larger size than crustaceans, mesopelagic fishes were the main prey by mass, with myctophids being the most important fish family in terms of both abundance (68% of the fish) and diversity (10 species). Prey distribution indicated that soft-plumaged petrels foraged primarily in oceanic subantarctic waters to feed their chicks. The oceanic life style of gadfly petrels was then highlighted by a review of their diet worldwide (20 species, 26 studies). Gadfly petrels prey mainly upon mesopelagic fishes (chiefly myctophids) and squids with their relative proportions depending on species and localities. Crustaceans are minor food items for tropical species, but they form a significant part of the food of the small- and medium-sized petrels that live in temperate and cold waters. The review underlines the need for more well-designed investigations on this globally endangered group of seabirds, since dietary information is available for only 57% of the 35 species of gadfly petrels. |
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1432-1793 |
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yes |
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8340 |
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Author |
Yves Cherel, Karine Delord, Christophe Barbraud, Henri Weimerskirch |
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Title |
Diet, isotopic niche, and spatial distribution of the white-headed petrel (Pterodroma lessonii) at Kerguelen Islands |
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Journal |
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Year |
2022 |
Publication |
Polar Biology |
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Volume |
45 |
Issue |
11 |
Pages |
1607-1621 |
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Keywords |
Fish Food Myctophidae Procellariiformes Seabirds Southern ocean Squid |
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Abstract |
The subantarctic white-headed petrel is unique amongst Procellariidae by its biennial breeding frequency. Its food and feeding ecology is poorly known with limited available bio-logging data and no dietary and isotopic information. Our goal was to detail its prey species and isotopic niche at Kerguelen Islands, which is the most important breeding site in the Indian Ocean. Analysis of stomach contents (n = 56) indicated chicks were fed on fish (68% by mass) and secondarily on cephalopods (26%), whilst crustaceans were minor dietary components. Mesopelagic fishes were the main prey, with myctophids and melamphaids being the most important fish family in terms of both abundance (50% and 15% of the fish, respectively) and diversity (10 and three species). Prey distribution indicated that petrels foraged primarily in subantarctic waters and secondarily further south to feed their chicks, which is corroborated by the lower blood δ13C values of fledglings (n = 10) than incubating adults (n = 9). Body feather δ13C values (n = 45) indicate that adult white-headed petrels moulted over different latitudinal habitats, from the subtropics to Antarctica where δ15N values showed they fed on low trophic-level prey (most likely Antarctic krill). Indeed, three geolocator-tracked birds ranged widely, from the mid-Atlantic (18° W) to the eastern Indian Ocean (110° E) and from the warmer Subtropical Zone (19% of the locations), across the Subantarctic Zone (58%) to the colder Antarctic Zone (23%). Neither fishery-related items nor plastic debris were found in chick food samples, thus indicating no significant interactions with human activities, which is a key positive issue for the conservation of white-headed petrels. |
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1432-2056 |
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yes |
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8567 |
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Louzao Maite, Pinaud David, Péron Clara, Delord Karine, Wiegand Thorsten, Weimerskirch Henri, |
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Title |
Conserving pelagic habitats: seascape modelling of an oceanic top predator
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Journal Article |
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Year |
2011 |
Publication |
Journal of Applied Ecology |
Abbreviated Journal |
J Appl Ecol |
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Volume |
48 |
Issue |
1 |
Pages |
121-132 |
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Keywords |
first passage time, habitat modelling, indicator species, network of marine protected areas, prey capture data, Southern Ocean, time spent per unit area, wide-ranging predators, wandering albatross, |
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Abstract |
1.Currently pelagic ecosystems are changing significantly due to multiple threats. An important management policy is to establish marine protected areas, until now overlooked due to the difficulty of declaring high seas protected areas, obtaining long-term distribution data on indicator species and the dynamic nature of these ecosystems. 2.Within this framework, we developed predictive habitat suitability models of an oceanic predator, the vulnerable wandering albatross Diomedea exulans, in the highly dynamic Southern Ocean. Based on a long-term tracking database (19982008), we estimated three quantitative ecological indices that complementarily describe the hierarchical habitat use of the species at multiple spatial scales: where the species (i) spent more time (the seascape, based on the time spent per area), (ii) searched for prey (the foraging habitat, based on zones of increased foraging intensity using first passage time), and (iii) fed (the feeding habitat, based on prey capture data). 3.Predictive habitat models reasonably matched the observed distribution patterns and described albatross multi-scale habitat use as a hierarchical arrangement: albatrosses foraged over topographic features in subtropical waters, nested within the wider seascape due to the constraint imposed by the colony effect, whereas feeding occurred nested over the continental shelf and seamounts in areas of low oceanographic variability within the Polar Frontal Zone. 4.Within the current oceanographic conditions, the location of key pelagic habitats for albatrosses breeding in the southern Indian Ocean encompassed certain topographic features such as pelagic areas surrounding main breeding sites, seamounts and submarine mountain ranges. The placement of these pelagic hotspots depends on the current sea surface temperature conditions. 5.Synthesis and applications. The present study provides two key conservation and management tools. First, we provide the first map to support the development of a prospective network of priority conservation zones across the southern Indian Ocean based on habitat predictions of an oceanic indicator species. This could be used not only to support conservation of top predators but also the underlying biodiversity associated with pelagic key habitats. Secondly, the developed habitat modelling procedure is widely applicable and could be used to track changes in species distribution in both marine and terrestrial environments within the current global change scenario.
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Blackwell Publishing Ltd |
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ISSN |
1365-2664 |
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yes |
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Serial |
3266 |
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Author |
Pitout F., Marchaudon A., Blelly P.‐L., Bai X., Forme F., Buchert S. C., Lorentzen D. A. |
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Title |
Swarm and ESR observations of the ionospheric response to a field‐aligned current system in the high‐latitude midnight sector |
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Journal |
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Year |
2015 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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Volume |
42 |
Issue |
11 |
Pages |
4270-4279 |
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Keywords |
field‐aligned currents ionosphere |
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Abstract |
Abstract We present a conjunction between the Swarm fleet and the European Incoherent Scatter Svalbard Radar (ESR) on 9 January 2014. The Swarm orbit in the early phase of the mission gives us the unique opportunity of sequencing the temporal evolution of the observed field?aligned current system in the nightside, near magnetic local midnight. These field?aligned currents are seen to move poleward through the radar field of view and to affect the observed ionosphere. The upward field?aligned current (FAC) is responsible, at least in part, for the heating of the ionospheric electrons. It is less clear whether the downward FAC cools the ionosphere. We use the TRANSCAR model of the ionosphere to quantify the thermoelectric effect that comes into play. Finally, we compare the plasma parameters measured by the Langmuir probe on board Swarm and the ESR and conclude on an agreement within the errors. |
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312 |
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Publisher |
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Place of Publication |
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Editor |
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Language |
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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 |
0094-8276 |
ISBN |
0094-8276 |
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Expedition |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6854 |
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