Melt Procedure Affects the Photosynthetic Response of Sea Ice Algae.
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Mundy, C. J.
Juhl, Andrew R.
Dalman, Laura A.
Galley, Ryan J.
Else, Brent E.
Geilfus, Nicolas X.
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The accuracy of sea ice algal production estimates is influenced by the range of melting procedures used in studies to obtain a liquid sample for incubation, particularly in relation to the duration of melt and the approach to buffering for osmotic shock. In this research, ice algal photophysiology from 14C incubations was compared in field samples prepared by three melt procedures: (i) a rapid 4 h melt of the bottommost ( < 1 cm) ice algal layer scraped into a large volume of filtered seawater (salinity 27–30), (ii) melt of a bottom 5 cm section diluted into a moderate volume of filtered seawater over 24 h (salinity 20–24), and (iii) melt of a bottom 5 cm section without any filtered seawater dilution over about 48 h (salinity 10–12). Maximum photosynthetic rate, photosynthetic efficiency and production at zero irradiance were significantly affected by the melt treatment employed in experiments. All variables were greatest in the highly diluted scrape sample and lowest in.....
JournalFrontiers in Earth Science
Sustainable Development Goals (SDG)http://purl.unep.org/sdg/SDGIO_00000048
Essential Ocean Variables (EOV)Sea Ice
Best Practice TypeGuide
Spatial CoverageArctic Ocean
CitationCampbell, K, ; Mundy, C.J.; Juhl, A.R.; Dalman, L.A.; Michel, C.; Galley, R.J.; Else, B.E.; Geilfus, N.X. and Rysgaard, S. (2019) Melt Procedure affects the Photosynthetic Response of Sea Ice Algae. Frontiers in Earth Science, 7:21, 14p. DOI:10.3389/feart.2019.00021
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