Impacts of ocean warming and acidification on the larval development of the barnacle Amphibalanus improvisus
Pansch, Christian, Nasrolahi, Ali, Appelhans, Yasmin and Wahl, Martin (2012) Impacts of ocean warming and acidification on the larval development of the barnacle Amphibalanus improvisus Journal of Experimental Marine Biology and Ecology, 420-421 . pp. 48-55. DOI 10.1016/j.jembe.2012.03.023.
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The world's oceans are warming and becoming more acidic. Both stressors, singly or in combination, impact marine species, and ensuing effects might be particularly serious for early life stages. To date most studies have focused on ocean acidification (OA) effects in fully marine environments, while little attention has been devoted to more variable coastal ecosystems, such as the Western Baltic Sea. Since natural spatial and temporal variability of environmental conditions such as salinity, temperature or pCO(2) impose more complex stresses upon organisms inhabiting these habitats, species can be expected to be more tolerant to OA (or warming) than fully marine taxa. We present data on the variability of salinity, temperature and pH within the Kiel Fjord and on the responses of the barnacle Amphibalanus improvisus from this habitat to simulated warming and OA during its early development. Nauplii and cyprids were exposed to different temperature (12, 20 and 27 degrees C) and pCO(2) (nominally 400, 1250 and 3250 mu atm) treatments for 8 and 4 weeks, respectively. Survival, larval duration and settlement success were monitored. Warming affected larval responses more strongly than OA. Increased temperatures favored survival and development of nauplii but decreased survival of cyprids. OA had no effect upon survival of nauplii but enhanced their development at low (12 degrees C) and high (27 degrees C) temperatures. In contrast, at the intermediate temperature (20 degrees C), nauplii were not affected even by 3250 mu atm pCO(2). None of the treatments significantly affected settlement success of cyprids. These experiments show a remarkable tolerance of A. improvisus larvae to 1250 mu atm pCO(2), the level of OA predicted for the end of the century
|Keywords:||Amphibalanus improvisus; Barnacles; Cypris; Nauplius; Ocean acidification; Warming; AMPHITRITE DARWIN CIRRIPEDIA; CLIMATE-CHANGE; BALANUS-AMPHITRITE; HIGH CO2; SEMIBALANUS-BALANOIDES; EMBRYONIC-DEVELOPMENT; ANTHROPOGENIC CO2; MARINE CALCIFIERS; BALTIC SEA; TEMPERATURE; Marine ecology; Benthic Ecology|
|Research affiliation:||OceanRep > The Future Ocean - Cluster of Excellence > FO-R08
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
|Projects:||BIOACID, Future Ocean|
|Date Deposited:||06 Sep 2012 07:11|
|Last Modified:||16 Feb 2017 10:40|
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