Seawater carbonate chemistry and hatch rates of Antarctic krill ...

• Main Authors: Kawaguchi, So, Ishida, Akio, King, Rob, Raymond, Ben, Waller, N, Constable, A, Nicol, Steven, Wakita, M, Ishimatsu, Atsushi
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: Animalia; Antarctic; Arthropoda; Bottles or small containers/Aquaria <20 L; Euphausia superba; Laboratory experiment; Open ocean; Pelagos; Polar; Reproduction; FOS Medical biotechnology; Single species; Zooplankton; Species; Identification; Treatment; Replicate; Eggs; Eggs, hatched; Eggs, unhatched; Salinity; Salinity, standard deviation; Temperature, water; Temperature, standard deviation; Alkalinity, total; pH; pH, standard deviation; Carbonate system computation flag; Carbon dioxide; Partial pressure of carbon dioxide water at sea surface temperature wet air; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Aragonite saturation state; Calcite saturation state; Experiment; Potentiometric titration; Potentiometric; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Southern Ocean; Antarc*; Antarctic Krill; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.826460; https://doi.pangaea.de/10.1594/PANGAEA.826460

Marine ecosystems of the Southern Ocean are particularly vulnerable to ocean acidification. Antarctic krill (Euphausia superba; hereafter krill) is the key pelagic species of the region and its largest fishery resource. There is therefore concern about the combined effects of climate change, ocean acidification and an expanding fishery on krill and ultimately, their dependent predators-whales, seals and penguins. However, little is known about the sensitivity of krill to ocean acidification. Juvenile and adult krill are already exposed to variable seawater carbonate chemistry because they occupy a range of habitats and migrate both vertically and horizontally on a daily and seasonal basis. Moreover, krill eggs sink from the surface to hatch at 700-1,000 m, where the carbon dioxide partial pressure (pCO2) in sea water is already greater than it is in the atmosphere. Krill eggs sink passively and so cannot avoid these conditions. Here we describe the sensitivity of krill egg hatch rates to increased CO2, and ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2014-01-20. ...