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Author |
Hermant M. |
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2011 |
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136 |
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yes |
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3402 |
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Title |
Variation and correlation in the timing of breeding of North Atlantic seabirds across multiple scales |
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Journal |
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Year |
2022 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
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Volume |
91 |
Issue |
9 |
Pages |
1797-1812 |
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Keywords |
breeding time climate change macroecology multispecies phenology |
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Abstract |
Timing of breeding, an important driver of fitness in many populations, is widely studied in the context of global change, yet despite considerable efforts to identify environmental drivers of seabird nesting phenology, for most populations we lack evidence of strong drivers. Here we adopt an alternative approach, examining the degree to which different populations positively covary in their annual phenology to infer whether phenological responses to environmental drivers are likely to be (a) shared across species at a range of spatial scales, (b) shared across populations of a species or (c) idiosyncratic to populations. We combined 51 long-term datasets on breeding phenology spanning 50 years from nine seabird species across 29 North Atlantic sites and examined the extent to which different populations share early versus late breeding seasons depending on a hierarchy of spatial scales comprising breeding site, small-scale region, large-scale region and the whole North Atlantic. In about a third of cases, we found laying dates of populations of different species sharing the same breeding site or small-scale breeding region were positively correlated, which is consistent with the hypothesis that they share phenological responses to the same environmental conditions. In comparison, we found no evidence for positive phenological covariation among populations across species aggregated at larger spatial scales. In general, we found little evidence for positive phenological covariation between populations of a single species, and in many instances the inter-year variation specific to a population was substantial, consistent with each population responding idiosyncratically to local environmental conditions. Black-legged kittiwake Rissa tridactyla was the exception, with populations exhibiting positive covariation in laying dates that decayed with the distance between breeding sites, suggesting that populations may be responding to a similar driver. Our approach sheds light on the potential factors that may drive phenology in our study species, thus furthering our understanding of the scales at which different seabirds interact with interannual variation in their environment. We also identify additional systems and phenological questions to which our inferential approach could be applied. |
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330 |
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ISSN |
1365-2656 |
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yes |
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Serial |
8447 |
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Title |
Variation Among Species and Populations, and Carry-Over Effects of Winter Exposure on Mercury Accumulation in Small Petrels |
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Journal |
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Year |
2022 |
Publication |
Frontiers in Ecology and Evolution |
Abbreviated Journal |
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10 |
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Pages |
915199 |
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Abstract |
Even in areas as remote as the Southern Ocean, marine organisms are exposed to contaminants that arrive through long-range atmospheric transport, such as mercury (Hg), a highly toxic metal. In previous studies in the Southern Ocean, inter-specific differences in Hg contamination in seabirds was generally related to their distribution and trophic position. However, the Blue Petrel (Halobaena caerulea) was a notable exception among small seabirds, with higher Hg levels than expected. In this study, we compared the Hg contamination of Blue Petrels and Thin-billed Prions (Pachyptila belcheri), which both spend the non-breeding season in polar waters, with that of Antarctic Prions (Pachyptila desolata), which spend the winter in subtropical waters. We collected body feathers and blood samples, representing exposure during different time-frames. Hg concentrations in feathers, which reflect contamination throughout the annual cycle, were related to ?13C values, and varied with ocean basin and species. Blue Petrels from breeding colonies in the southeast Pacific Ocean had much higher feather Hg concentrations than expected after accounting for latitude and their low trophic positions. Both Hg concentrations and ?15N in blood samples of Blue Petrels were much lower at the end than at the start of the breeding period, indicating a marked decline in Hg contamination and trophic positions, and the carry-over of Hg burdens between the wintering and breeding periods. Elevated Hg levels may reflect greater reliance on myctophids or foraging in sea-ice environments. Our study underlines that carry-over of Hg concentrations in prey consumed in winter may determine body Hg burdens well into the breeding season. |
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109 |
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2296-701X |
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yes |
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8415 |
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Variation among species and populations in bill shape and size in three planktivorous petrels |
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Journal |
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Year |
2022 |
Publication |
Marine Biology |
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Volume |
169 |
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2 |
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24 |
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Keywords |
Bill morphology Character displacement Ecological segregation Geometric morphometrics Niche differentiation Seabirds |
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354 |
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ISSN |
1432-1793 |
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yes |
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Serial |
8414 |
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Author |
Hennion F, Hermant M, Winkworth R, Vernon P, Convey P, Prinzing A |
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Title |
Variance and covariance of traits in plant species across abiotic gradients in the sub-Antarctic Kerguelen Is. and significance for adaptive potential. VII Southern Connection Congress, Dunedin, New-Zealand, 19-25 January 2013 |
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Conference - International - Communication |
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Year |
2013 |
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Abstract |
invited conference |
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136 |
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yes |
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Serial |
4350 |
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Title |
Variable temperature effects of Open Top Chambers at polar and alpine sites explained by irradiance and snow depth
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Journal Article |
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Year |
2013 |
Publication |
GLOBAL CHANGE BIOLOGY |
Abbreviated Journal |
Glob Chang Biol |
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Volume |
19 |
Issue |
1 |
Pages |
64-74 |
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Keywords |
alpine, Antarctic, Arctic, climate change, extreme weather, freeze-thaw, PAR, Snow, temperature variation, tundra, warming experiment, wind, |
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136 |
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1365-2486 |
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yes |
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Serial |
4344 |
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Author |
Staszewski, V., McCoy, K.D. & Boulinier, T. 2008. |
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Variable exposure and immunological response to Lyme disease Borrelia among North Atlantic seabird species. |
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Journal Article |
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Year |
2008 |
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Proceedings of the royal society b-biological sciences |
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Proc. Biol. Sci. |
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275 |
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2101-2109 |
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333 |
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0962-8452 |
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yes |
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Serial |
5280 |
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Author |
Angelier J., Bergerat F. & Homberg C. |
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Title |
Variable coupling across weak oceanic transform fault:Flateyjarskagi, Iceland. |
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Journal Article |
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Year |
2001 |
Publication |
Terra nova |
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12 |
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97-101 |
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316 |
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0954-4879 |
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yes |
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2092 |
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Author |
Mbengue, A.A., M.-N. Houssais, C.Herbaut, G. Williams and J-B. Charrassin |
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Title |
Variability of the Mertz Glacier Polynya based on AMSR-E observations, |
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Conference - International - Poster |
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2010 |
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IPY Oslo Science Conference, 8-12 June, 2010, Oslo, Norway. |
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452 |
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yes |
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Serial |
685 |
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Author |
Houssais M.N. & Herbaut C. |
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Title |
Variability of the ice export through Fram Strait in 1993-98 : the winter 1994-95 anomaly. |
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Journal Article |
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Year |
2003 |
Publication |
Polar research |
Abbreviated Journal |
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Volume |
22 |
Issue |
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Pages |
99-106 |
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452 |
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ISSN |
0800-0395 |
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yes |
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Call Number |
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Serial |
2971 |
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