Effects of iron and light availability on phytoplankton photosynthetic properties in the Ross Sea

• DOI: 10.3354/meps13000
• Publication Date: 2019-05-28T11:09:00Z
• Authors: AC Alderkamp; GL van Dijken; KE Lowry; KM Lewis; L Joy-Warren H; Wv de Poll; P Laan; L Gerringa; O Delmont T; B Jenkins; KR Arrigo
• Keywords: Marine Biology

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 621:33-50 (2019) - DOI: https://doi.org/10.3354/meps13000 Effects of iron and light availability on phytoplankton photosynthetic properties in Ross Sea Anne-Carlijn Alderkamp1,2, Gert L. van Dijken1, Kate E. Lowry1, M. Lewis1, Hannah Joy-Warren1, Willem de Poll3, Patrick Laan4, Loes Gerringa4, Tom O. Delmont5,7, Bethany D. Jenkins6, Kevin R. Arrigo1,* 1Department Earth System Science, Stanford University, Stanford, CA 94305, USA 2Biology Department, Foothill College, Los Altos Hills, 94022, 3Department Ocean Ecosystems, University Groningen, PO Box 11103, 9700 CC, The Netherlands 4Royal Institute for Research, OCS, Utrecht, 59, 1790 AB, Den Burg, 5Department Medicine, Chicago, IL 60637, 6Department Cell Molecular Biology Graduate School Oceanography, Rhode Island, Kingston, RI 02881, 7Present address: Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, 91000 Evry, France *Corresponding author: [e-mail] ABSTRACT: Waters Southern are characterized by high macronutrient concentrations but limited trace metals light, often making it difficult achieve maximum growth rates. One strategy employed culture cope with low dissolved (DFe) is enhance absorption increasing their antenna size rather than number reaction centers, thereby reducing Fe demand. Here we provide physiological evidence that natural populations employ a similar photoacclimation ambient DFe concentrations. During research cruise 2013-2014, conducted 4 bioassay experiments which manipulated measured changes biomass, rate, parameters, fluorescence pigment composition. Phytoplankton responded strongly additions, exhibiting significantly higher rates, competency. At rate (P*max) was reduced efficiency (α*) unchanged compared treatment, regardless species composition or concentration. Our data suggest have evolved an Fe-saving whereby they photoacclimate unit size, number, even when available. It appears this characteristic both Phaeocystis antarctica diatoms, suggesting common adaptation among taxa grow under limitation Ocean. KEY WORDS: · Photophysiology Iron Full text pdf format PreviousNextCite article as: Alderkamp AC, Dijken GL, Lowry KE, Lewis KM others Sea. Mar Ecol Prog Ser 621:33-50. Export citation Tweet linkedIn Cited Published Vol. 621. Online publication date: July 04, 2019 Print ISSN: 0171-8630; 1616-1599 Copyright © Inter-Research.