Climate-Driven Ichthyoplankton Drift Model Predicts Growth of Top Predator Young

Climate variability influences seabird population dynamics in several ways including access to prey near colonies during the critical chick-rearing period. This study addresses breeding success in a Barents Sea colony of common guillemots Uria aalge where trophic conditions vary according to changes...

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Bibliographic Details
Published in:PLoS ONE
Main Authors: Myksvoll, Mari Skuggedal, Erikstad, Kjell E., Barrett, Robert T., Sandvik, Hanno, Vikebø, Frode Bendiksen
Format: Article in Journal/Newspaper
Language:English
Published: Public Library of Science (PLoS) 2013
Subjects:
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488
Barents Sea
common guillemot
Gadus morhua
Uria aalge
uria
Online Access:https://hdl.handle.net/10037/6062
https://doi.org/10.1371/journal.pone.0079225
Description
Summary:Climate variability influences seabird population dynamics in several ways including access to prey near colonies during the critical chick-rearing period. This study addresses breeding success in a Barents Sea colony of common guillemots Uria aalge where trophic conditions vary according to changes in the northward transport of warm Atlantic Water. A drift model was used to simulate interannual variations in transport of cod Gadus morhua larvae along the Norwegian coast towards their nursery grounds in the Barents Sea. The results showed that the arrival of cod larvae from southern spawning grounds had a major effect on the size of common guillemot chicks at fledging. Furthermore, the fraction of larvae from the south was positively correlated to the inflow of Atlantic Water into the Barents Sea thus clearly demonstrating the mechanisms by which climate-driven bottom-up processes influence interannual variations in reproductive success in a marine top predator.

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