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

Olischläger, Mark, Bartsch, Inka, Gutow, Lars and Wiencke, Christian (2012) Effects of ocean acidification on different life-cycle stages of the kelp Laminaria hyperborea (Phaeophyceae) Botanica Marina, 55 (5). DOI 10.1515/bot-2012-0163.

[img] Text
bot-2012-0163.pdf - Published Version
Restricted to Registered users only

Download (885Kb)

Supplementary data:

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.

Document Type: Article
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1515/bot-2012-0163
ISSN: 0006-8055
Projects: BIOACID
Date Deposited: 12 Nov 2012 14:12
Last Modified: 05 May 2014 10:38
URI: http://oceanrep.geomar.de/id/eprint/19176

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...