Survival and settling of larval Macoma balthica in a large-scale mesocosm experiment at different f CO2 levels

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http://hdl.handle.net/10138/167631

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Jansson , A , Lischka , S , Boxhammer , T , Schulz , K G & Norkko , J 2016 , ' Survival and settling of larval Macoma balthica in a large-scale mesocosm experiment at different f CO2 levels ' , Biogeosciences , vol. 13 , no. 11 , pp. 3377-3385 . https://doi.org/10.5194/bg-13-3377-2016

Title: Survival and settling of larval Macoma balthica in a large-scale mesocosm experiment at different f CO2 levels
Author: Jansson, Anna; Lischka, Silke; Boxhammer, Tim; Schulz, Kai G.; Norkko, Joanna
Contributor: University of Helsinki, Tvärminne Zoological Station
Date: 2016
Language: eng
Number of pages: 9
Belongs to series: Biogeosciences
ISSN: 1726-4170
URI: http://hdl.handle.net/10138/167631
Abstract: Anthropogenic carbon dioxide (CO2) emissions are causing severe changes in the global inorganic carbon balance of the oceans. Associated ocean acidification is expected to pose a major threat to marine ecosystems worldwide, and it is also expected to be amplified in the Baltic Sea where the system is already exposed to relatively large natural seasonal and diel pH fluctuations. We studied the responses of larvae of the benthic key species Macoma balthica to a range of future CO2 scenarios using six similar to 55 m(3) mesocosms encompassing the entire pelagic community. The mesocosms were deployed in the northern Baltic Sea in June 2012. We focused on the survival, growth and subsequent settlement process of Macoma balthica when exposed to different levels of future CO2. The size and time to settlement of M. balthica increased along the CO2 gradient, suggesting a developmental delay. With ongoing climate change, both the frequency and extent of regularly occurring high CO2 conditions are likely to increase, and a permanent pH decrease will likely occur. The strong impact of increasing CO2 levels on early-stage bivalves is alarming as these stages are crucial for sustaining viable populations, and a failure in their recruitment would ultimately lead to negative effects on the population.
Subject: CARBON-DIOXIDE CONCENTRATIONS
OCEAN ACIDIFICATION
BALTIC SEA
JUVENILE BIVALVES
TECHNICAL NOTE
MYA-ARENARIA
COMMUNITY
ECOSYSTEM
PH
SIZE
1172 Environmental sciences
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