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Botanica Marina

Editor-in-Chief: Dring, Matthew J.

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1437-4323
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Volume 55, Issue 5

Issues

Effects of ocean acidification on different life-cycle stages of the kelp Laminaria hyperborea (Phaeophyceae)

Mark Olischläger
  • Corresponding author
  • Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
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/ Inka Bartsch
  • Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
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  • De Gruyter OnlineGoogle Scholar
/ Lars Gutow
  • Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
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/ Christian Wiencke
  • Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany
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Published Online: 2012-08-18 | DOI: https://doi.org/10.1515/bot-2012-0163

Abstract

Our objective for this study was to evaluate the influence of preindustrial and expected future atmospheric CO2 concentrations (280 μatm and 700 μatm pCO2, respectively) on different life-cycle stages of the kelp Laminaria hyperborea from Helgoland (Germany, North Sea). Zoospore germination, gametogenesis, vegetative growth, sorus formation and photosynthetic performance of vegetative and fertile tissue were examined. The contribution of external carbonic anhydrase (exCA) to C-supply for net-photosynthesis (net-PS) and the Chla- and phlorotannin content were investigated. Female gametogenesis and vegetative growth of sporophytes were significantly enhanced under the expected future pCO2. rETR(max) and net-PS of young vegetative sporophytes tended to increase performance at higher pCO2. The trend towards elevated net-PS vanished after inhibition of exCA. In vegetative sporophytes, phlorotannin content and Chla content were not significantly affected by pCO2.

Keywords: Laminaria hyperborea; life-cycle; microstages; ocean acidification; photosynthesis

About the article

Corresponding author: Mark Olischläger, Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany


Received: 2012-05-24

Accepted: 2012-07-19

Published Online: 2012-08-18

Published in Print: 2012-10-01


Citation Information: Botanica Marina, Volume 55, Issue 5, Pages 511–525, ISSN (Online) 1437-4323, ISSN (Print) 0006-8055, DOI: https://doi.org/10.1515/bot-2012-0163.

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©2012 by Walter de Gruyter Berlin Boston. Copyright Clearance Center

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