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Long chain omega\u20103 fatty acids, a subgroup of polyunsaturated fatty acids (PUFAs) produced exclusively by these algae, are essential to all marine organisms for successful reproduction, growth, and development. During an extensive field study in the Arctic shelf seas, we followed the seasonal biomass development of ice algae and phytoplankton and their food quality in terms of their relative PUFA content. The first PUFA\u2010peak occurred in late April during solid ice cover at the onset of the ice algal bloom, and the second PUFA\u2010peak occurred in early July just after the ice break\u2010up at the onset of the phytoplankton bloom. The reproduction and growth of the key Arctic grazer <jats:italic>Calanus glacialis<\/jats:italic> perfectly coincided with these two bloom events. Females of <jats:italic>C. glacialis<\/jats:italic> utilized the high\u2010quality ice algal bloom to fuel early maturation and reproduction, whereas the resulting offspring had access to ample high\u2010quality food during the phytoplankton bloom 2 months later. Reduction in sea ice thickness and coverage area will alter the current primary production regime due to earlier ice break\u2010up and onset of the phytoplankton bloom. A potential mismatch between the two primary production peaks of high\u2010quality food and the reproductive cycle of key Arctic grazers may have negative consequences for the entire lipid\u2010driven Arctic marine ecosystem.<\/jats:p>","DOI":"10.1111\/j.1365-2486.2010.02175.x","type":"journal-article","created":{"date-parts":[[2010,1,18]],"date-time":"2010-01-18T16:21:46Z","timestamp":1263831706000},"page":"3154-3163","source":"Crossref","is-referenced-by-count":515,"title":["Timing of blooms, algal food quality and <i>Calanus glacialis<\/i> reproduction and growth in a changing Arctic"],"prefix":"10.1111","volume":"16","author":[{"given":"JANNE E.","family":"S\u00d8REIDE","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"EVA","family":"LEU","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00d8RGEN","family":"BERGE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"MARTIN","family":"GRAEVE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"STIG","family":"FALK\u2010PETERSEN","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2010,1,18]]},"reference":[{"key":"e_1_2_6_2_1","volume-title":"Marine Biogenic Lipids, Fats, and Oils","author":"Ackman RG","year":"1989"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2486.2006.01181.x"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1029\/2008gl035028"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsbl.2008.0484"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.dsr2.2008.05.018"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.3354\/meps291125"},{"key":"e_1_2_6_8_1","volume-title":"Lipid Analysis","author":"Christie WW","year":"1982"},{"key":"e_1_2_6_9_1","doi-asserted-by":"publisher","DOI":"10.1029\/2007gl031972"},{"key":"e_1_2_6_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00026299"},{"key":"e_1_2_6_11_1","first-page":"539","article-title":"The rearings of the marine calanoid copepods Calanus finmarchicus (Gunnerus), C. glacialis Jaschnov and C. hyperboreus Kr\u00f8yer with comment on the equiproportional rule","volume":"58","author":"Corkett CJ","year":"1986","journal-title":"Syllogeus"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00300-007-0255-5"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.3354\/meps179113"},{"key":"e_1_2_6_14_1","first-page":"315","volume-title":"Trophic Relationships in Marine Environments. 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