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Botanica Marina

Editor-in-Chief: Dring, Matthew J.

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1437-4323
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Volume 56, Issue 1

Issues

Combined effects of CO2, temperature, irradiance and time on the physiological performance of Chondrus crispus (Rhodophyta)

Mohammed Yusuf Sarker
  • Corresponding author
  • Alfred Wegener Institute for Polar and Marine Research, Department of Seaweed Biology, Functional Ecology Section, Am Handelshafen 12, 27570 Bremerhaven, Germany
  • Current address: Biology Department, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada.
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Inka Bartsch
  • Alfred Wegener Institute for Polar and Marine Research, Department of Seaweed Biology, Functional Ecology Section, Am Handelshafen 12, 27570 Bremerhaven, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Mark Olischläger
  • Alfred Wegener Institute for Polar and Marine Research, Department of Seaweed Biology, Functional Ecology Section, Am Handelshafen 12, 27570 Bremerhaven, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Lars Gutow
  • Alfred Wegener Institute for Polar and Marine Research, Department of Seaweed Biology, Functional Ecology Section, Am Handelshafen 12, 27570 Bremerhaven, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Christian Wiencke
  • Alfred Wegener Institute for Polar and Marine Research, Department of Seaweed Biology, Functional Ecology Section, Am Handelshafen 12, 27570 Bremerhaven, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2012-12-15 | DOI: https://doi.org/10.1515/bot-2012-0143

Abstract

In natural environments, marine biotas are exposed to a variety of simultaneously acting abiotic factors. Among these, temperature, irradiance and CO2 availability are major factors influencing the physiological performance of marine macroalgae. To test whether elevated levels of CO2 may remediate the otherwise reduced performance of uncalcified seaweeds under the influence of other stressful abiotic factors, we performed multi-factorial experiments with the red alga Chondrus crispus from Helgoland (North Sea) with two levels of CO2, temperature and irradiance: low and high pCO2 levels were tested in combination with either (1) optimal and low irradiances or (2) optimal and sub-lethal high temperatures for growth. Performance of C. crispus was evaluated as biomass increase and relative growth rates (RGR), gross photosynthesis and pigment content. Acclimations of growth and photosynthesis were measured after 4 and 8 days. Acclimation time was crucial for elucidating single or combined CO2 effects on growth and photosynthesis. Significant CO2 effects became evident only in combination with either elevated temperature or reduced irradiance. Growth and photosynthesis had divergent patterns: RGR and biomass significantly increased only under a combination of high pCO2 and elevated temperature; gross photosynthesis was significantly reduced under high pCO2 conditions at low irradiance. Pigment content varied in response to irradiance and temperature, but was independent of pCO2.

Keywords: Chondrus crispus; DIC; growth; photosynthesis; temperature

About the article

Corresponding author: Mohammed Yusuf Sarker, Alfred Wegener Institute for Polar and Marine Research, Department of Seaweed Biology, Functional Ecology Section, Am Handelshafen 12, 27570 Bremerhaven, Germany


Received: 2012-04-16

Accepted: 2012-10-23

Published Online: 2012-12-15

Published in Print: 2013-02-01


Citation Information: Botanica Marina, Volume 56, Issue 1, Pages 63–74, ISSN (Online) 1437-4323, ISSN (Print) 0006-8055, DOI: https://doi.org/10.1515/bot-2012-0143.

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©2013 by Walter de Gruyter Berlin Boston. Copyright Clearance Center

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