Effects of iron stress on chromatic adaptation by natural phytoplankton communities in the Southern Ocean

Effects of iron stress on chromatic adaptation were studied in natural phytoplankton communities collected in the Pacific region of the Southern Ocean. Iron enrichment experiments (48 to 72 h) were performed, incubating plankton communities under white, green and blue light respectively, with and wi...

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Bibliographic Details
Published in:Marine Ecology Progress Series
Main Authors: van Leeuwe, M.A., Timmermans, K.R., Witte, H.J., Kraay, G.W., Veldhuis, M.J.W., de Baar, H.J.W.
Format: Article in Journal/Newspaper
Language:English
Published: 1998
Subjects:
iron
chromatic adaptation
antarctic phytoplankton
CHLOROPHYLL-A FLUORESCENCE
EQUATORIAL PACIFIC-OCEAN
BLUE-GREEN LIGHT
PHAEODACTYLUM-TRICORNUTUM
PHOTOSYNTHETIC APPARATUS
MARINE-PHYTOPLANKTON
CHEMICAL-COMPOSITION
SCOTIA SEAS
WEDDELL SEA
GROWTH
Antarctic
Pacific
Southern Ocean
Weddell
Weddell Sea
Antarc*
Online Access:https://hdl.handle.net/11370/5dc2a789-337d-490f-a9f4-05eaca989394
https://research.rug.nl/en/publications/5dc2a789-337d-490f-a9f4-05eaca989394
https://doi.org/10.3354/meps166043
https://pure.rug.nl/ws/files/14977211/1998MarEcolProgServLeeuwe.pdf
Description
Summary:Effects of iron stress on chromatic adaptation were studied in natural phytoplankton communities collected in the Pacific region of the Southern Ocean. Iron enrichment experiments (48 to 72 h) were performed, incubating plankton communities under white, green and blue light respectively, with and without addition of 2 nM Fe. Pigment ratios were affected by iron addition only to a minor extent. The pigment composition as dictated by the light conditions was similar for both the iron-enriched and the unamended bottles. Upon iron addition, phytoplankton auto-fluorescence, as estimated by flow cytometry, decreased markedly, indicating iron stress of the endemic phytoplankton community. It was concluded that iron did not control chromatic adaptation via the pigment composition, but exerted a clear effect on the efficiency of electron transfer.

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