Effects of elevated pCO_2 on reproductive properties of the benthic copepod Tigriopus japonicus and gastropod Babylonia japonica

摘要

We investigated the effects of elevated pCO_2 in seawater both on the acute mortality and the reproductive properties of the benthic copepod Tigriopus japonicus and gastropod Babylonia japonica with the purpose of accumulating basic data for assessing potential environmental impacts of sub-sea geological storage of anthropogenic CO_2 in Japan. Acute tests showed that nauplii of T. japonicus have a high tolerance to elevated pCO_2 environments. Full life cycle tests on T. japonicus indicated NOEC = 5800 μatm and LOEC = 37,000 μatm. Adult B. japonica showed remarkable resistance to elevated pCO_2 in the acute tests. Embryonic development of B. japonica showed a NOEC = 1500 μatm and LOEC = 5400 μatm. T. japonicus showed high resistance to elevated pCO_2 throughout the life cycle and B. japonica are rather sensitive during the veliger stage when they started to form their shells.