Later at higher latitudes: large-scale variability in seabird breeding timing and synchronicity
Burr, Zofia M.; Varpe, Øystein; Anker-Nilssen, Tycho; Erikstad, Kjell E; Descamps, Sébastien; Barrett, Robert T; Bech, Claus; Christensen-Dalsgaard, Signe; Lorentsen, Svein-Håkon; Moe, Børge; Reiertsen, Tone Kristin; Strøm, Hallvard
Peer reviewed, Journal article
Permanent lenke
http://hdl.handle.net/11250/2391727Utgivelsesdato
2016Metadata
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Sammendrag
In seasonal environments, organisms are expected to optimally schedule reproduction within
an annual range of environmental conditions. Latitudinal gradients generate a range of seasonality to
which we can expect adaptations to have evolved, and can be used to explore drivers of timing strategies
across species’ distribution ranges. This study compares the timing of egg hatching in four seabird species
(Atlantic puffin Fratercula arctica, black-legged
kittiwake Rissa tridactyla, common guillemot Uria aalge, and
Brünnich’s guillemot U. lomvia) covering a subarctic to Arctic latitudinal gradient along the Norwegian
coast to Svalbard (65–79°N). Hatching was significantly delayed by an estimated 1.7, 2.3, and 1.9 d per
latitudinal degree for puffins, kittiwakes, and common guillemots, respectively, but was not delayed for
Brünnich’s guillemots. Hatching distributions revealed an increase in intra-annual
breeding synchronicity
along a latitudinal gradient for kittiwakes only, whereas the two guillemots exhibited high hatching synchronicity
at all colonies. We used this large-scale,
multispecies timing data series to discuss constraints,
adaptations, and mechanisms affecting breeding timing, a necessary step to recognize risks to populations
and predict future ecosystem change.
Arctic; Fratercula arctica; hatching timing; inter-annual variability; Rissa tridactyla; seasonality;
spatial phenology; Uria aalge; Uria lomvia.
Received