Effect of ocean acidification on fertilization success of Strongylocentrotus droebachiensis


Contact
Desislava.Boegner [ at ] awi.de

Abstract

Future impacts of ocean acidification on reproduction of exposed marine organisms with consequences at the population level still have to be properly analyzed and understood. For fertilization, eggs of echinoderms are directly released into seawater where the acrosome reaction takes place. Therefore, gametes are directly exposed unprotected to the detrimental conditions of an acidified environment. There is evidence that internal pH levels of cells change within 15-30 min conditioned by the external pH to which the eggs are exposed. Internal pH of the eggs plays an important role in the metabolic functionality of the signaling pathways and enzymatic activations induced by the contact with the sperm. These processes prohibit polyspermy and initiate normal embryonic development. We selected a species of sea urchin from the Arctic (Strongylocentrotus droebachiensis) to study the effect of sea water acidification on fertilization success. First results on fertilization experiments under various pH conditions (180 µatm, 380 µatm, 980 µatm, 1400 µatm and 3000 µatm) at natural temperatures and with two different approaches (with or without pre-incubation of the eggs) will be presented. Dramatic effects on fertilization success and embryonic development were identified under prognostic future pH conditions. We will discuss the vulnerability of the process of fertilization under past, present and future conditions.



Item Type
Conference (Talk)
Authors
Divisions
Programs
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
BIOACID Annual Meeting, University of Bremen.
Eprint ID
25048
Cite as
Bögner, D. , Bickmeyer, U. and Köhler, A. (2011): Effect of ocean acidification on fertilization success of Strongylocentrotus droebachiensis , BIOACID Annual Meeting, University of Bremen .


Download
[img]
Preview
PDF
Agenda_BIOACID_Bremen_2011.pdf

Download (189kB) | Preview
Cite this document as:
[img]
Preview
PDF
Präsentation_BIOACID_2011_Fert_results.pdf

Download (2MB) | Preview
Cite this document as:

Share

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item