English
norskBrowsing by Author "Descamps, Sebastien"
Now showing items 1-13 of 13
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Centennial relationships between ocean temperature and Atlantic puffin production reveal shifting decennial trends
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-24)The current warming of the oceans has been shown to have detrimental effects for a number of species. An understanding of the underlying mechanisms may be hampered by the non-linearity and non-stationarity of the relationships between temperature and demography, and by the insufficient length of available time series. Most demographic time series are too short to study the effects of climate on ... -
Diverging phenological responses of Arctic seabirds to an earlier spring
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-31)The timing of annual events such as reproduction is a critical component of how free‐living organisms respond to ongoing climate change. This may be especially true in the Arctic, which is disproportionally impacted by climate warming. Here, we show that Arctic seabirds responded to climate change by moving the start of their reproduction earlier, coincident with an advancing onset of spring and ... -
Earlier colony arrival but no trend in hatching timing in two congeneric seabirds (Uria spp.) across the North Atlantic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-23)A global analysis recently showed that seabird breeding phenology (as the timing of egg-laying and hatching) does not, on average, respond to temperature changes or advance with time (Keogan <i>et al.</i> 2018 <i>Nat. Clim. Change</i> <b>8</b>, 313–318). This group, the most threatened of all birds, is therefore prone to spatio-temporal mismatches with their food resources. Yet, other aspects of ... -
Foraging tactics in dynamic sea-ice habitats affect individual state in a long-ranging seabird
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-13)<ol> <li>Individual heterogeneity in diet and foraging behaviour is common in wild animal populations, and can be a strong determinant of how populations respond to environmental changes. Within populations, variation in foraging behaviour and the occurrence of individual tactics in relation to resources distribution can help explain differences in individual fitness, and ultimately identify important ... -
Individual migration strategy fidelity but no habitat specialization in two congeneric seabirds
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-30)Aim: In migratory species, individuals often use fixed and individual-specific migration strategies, which we term individual migration strategy fidelity (IMSF). Our goal was to test if guillemots have flexible or fixed individual migration strategies (i.e. IMSF), if this behaviour is consistent across large parts of the genus’ range and if they were philopatric to geographical sites or a habitat ... -
Molecular tools prove little auks from Svalbard are extremely selective for Calanus glacialis even when exposed to Atlantification
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-22)Two Calanus species, C. glacialis and C. finmarchicus, due to different life strategies and environmental preferences act as an ecological indicators of Arctic Atlantification. Their high lipid content makes them important food source for higher trophic levels of Arctic ecosystems including the most abundant Northern Hemisphere's seabird, the little auk (Alle alle). Recent studies indicate a critical ... -
A review of the scientific knowledge of the seascape off Dronning Maud Land, Antarctica
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-29)Despite the exclusion of the Southern Ocean from assessments of progress towards achieving the Convention on Biological Diversity (CBD) Strategic Plan, the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) has taken on the mantle of progressing eforts to achieve it. Within the CBD, Aichi Target 11 represents an agreed commitment to protect 10% of the global coastal and ... -
The status and trends of seabirds breeding in Norway and Svalbard
(Research report; Forskningsrapport, 2015-03)This report presents the updated sizes, trends and spatial distributions of the breeding populations of 17 seabird species breeding in Norway and Svalbard. The analyses are based on available census and monitoring data from SEAPOP; the Norwegian monitoring and mapping program for seabirds. In addition, the report presents results from a species-specific literature review of the most important ... -
Strong migratory connectivity across meta-populations of sympatric North Atlantic seabirds
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-04)Identifying drivers of population trends in migratory species is difficult, as they can face many stressors while moving through different areas and environments during the annual cycle. To understand the potential of migrants to adjust to perturbations, it is critical to study the connection of different areas used by different populations during the annual cycle (i.e. migratory connectivity). ... -
Trophic and fitness correlates of mercury and organochlorine compound residues in egg-laying Antarctic petrels
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-24)Understanding the drivers and effects of exposure to contaminants such as mercury (Hg) and organochlorine compounds (OCs) in Antarctic wildlife is still limited. Yet, Hg and OCs have known physiological and fitness effects in animals, with consequences on their populations. Here we measured total Hg (a proxy of methyl-Hg) in blood cells and feathers, and 12 OCs (seven polychlorinated biphenyls, PCBs, ... -
Using near-infrared reflectance spectroscopy (NIRS) to estimate carbon and nitrogen stable isotope composition in animal tissues
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-05)<ol> <li>Stable isotopes analysis (SIA) of carbon and nitrogen provides valuable information about trophic interactions and animal feeding habits.</li> <li>We used near-infrared reflectance spectroscopy (NIRS) and support vector machines (SVM) to develop a model for screening isotopic ratios of carbon and nitrogen (δ<sup>13</sup>C and δ<sup>15</sup>N) in samples from living animals. We applied ... -
Within and between breeding-season changes in contaminant occurrence and body condition in the Antarctic breeding south polar skua
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-24)The Antarctic ecosystem represents a remote region far from point sources of pollution. Still, Antarctic marine predators, such as seabirds, are exposed to organohalogen contaminants (OHCs) which may induce adverse health effects. With increasing restrictions and regulations on OHCs, the levels and exposure are expected to decrease over time. We studied south polar skua (<i>Catharacta maccormicki</i>), ... -
Year-round distribution of Northeast Atlantic seabird populations: applications for population management and marine spatial planning
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021)Tracking data of marine predators are increasingly used in marine spatial management. We developed a spatial data set with estimates of the monthly distribution of 6 pelagic seabird species breeding in the Northeast Atlantic. The data set was based on year-round global location sensor (GLS) tracking data of 2356 adult seabirds from 2006−2019 from a network of seabird colonies, data describing the ...
