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- W2890965427 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 605:207-223 (2018) - DOI: https://doi.org/10.3354/meps12745 Zooplankton phenology may explain the North Water polynya’s importance as a breeding area for little auks Eva Friis Møller1,*, Kasper Lambert Johansen1, Mette Dalgaard Agersted1,2, Frank Rigét1,3, Daniel Spelling Clausen1, Janus Larsen1, Peter Lyngs4, Ane Middelbo1, Anders Mosbech1 1Arctic Research Center, Department of Bioscience, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark 2Department of Biosciences, University of Oslo, PO Box 1066 Blindern, 0316 Oslo, Norway 3Greenland Institute of Natural Resources, Kivioq 2, Nuuk 3900, Greenland 4Christiansø Biological Field Station, Christiansø, 3760 Gudhjem, Denmark *Corresponding author: efm@bios.au.dk ABSTRACT: The little auk Alle alle is the most abundant seabird in the North Atlantic, and >80% of the global population breeds along Greenland’s shores of the North Water (NOW) polynya region. We questioned why the NOW is such an important little auk breeding area, and hypothesized that the key factor may involve chick feeding opportunities. We studied the oceanography, and the distribution and abundance of little auks and their zooplankton prey between 73 and 78.5°N in August 2015, and concurrently sampled little auk chick diets. Zooplankton in the diet were dominated by Calanus hyperboreus and C. glacialis, but biomasses, community compositions and depth distributions differed across the latitudinal range. Little auk chicks were mainly fed Calanus spp. between 3 and 5 mm. Within the foraging range of the breeding colonies, areas where phytoplankton was concentrated in patches in the water column were important for the foraging distribution of little auks, and increasingly so at shorter distances from the colonies. In the NOW region, in contrast to other areas in Baffin Bay, high abundances of large Calanus spp. are present within little auk diving range both in spring/early summer and in late summer during the little auk chick-rearing period. We conclude that this unusually long and continuous presence of suitable prey items in the surface waters, covering the full little auk breeding cycle, is the main reason why the NOW region, under current climate conditions, is the most important little auk breeding area globally. KEY WORDS: Little auk · Alle alle · Zooplankton · Phytoplankton · Arctic · Calanus · Baffin Bay · North Water polynya Full text in pdf format PreviousNextCite this article as: Møller EF, Lambert Johansen K, Agersted MD, Rigét F and others (2018) Zooplankton phenology may explain the North Water polynya’s importance as a breeding area for little auks. Mar Ecol Prog Ser 605:207-223. https://doi.org/10.3354/meps12745 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 605. Online publication date: October 26, 2018 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2018 Inter-Research." @default.
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- W2890965427 title "Zooplankton phenology may explain the North Water polynya’s importance as a breeding area for little auks" @default.
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