Long-term effects of altered pH and temperature on the feeding energetics of the Antarctic sea urchin, Sterechinus neumayeri

• Main Authors: Morley, Simon A, Suckling, Coleen C, Clark, Melody S, Cross, Emma L, Peck, Loyd S
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2016
• Subjects: Animalia; Antarctic; Behaviour; Benthic animals; Benthos; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Echinodermata; Growth/Morphology; Laboratory experiment; Other metabolic rates; Polar; Reproduction; FOS Medical biotechnology; Respiration; Single species; Sterechinus neumayeri; Temperature; Type; Species; Registration number of species; Uniform resource locator/link to reference; Date; Treatment; Identification; Temperature, water; Dry mass; Ash free dry mass; Gonadosomatic index; Respiration rate, oxygen; Energy budget; Ammonia excretion; Urea; Oxygen consumed/Nitrogen excreted ratio; Gonad, mass; Ash free dry mass/dry mass ratio; Scope for growth; Alkalinity, total; Alkalinity, total, standard error; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air, standard error; pH; pH, standard error; Calcite saturation state; Calcite saturation state, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Temperature, water, standard error; Salinity; Salinity, standard error; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Carbon, inorganic, dissolved; Experiment; Calculated using CO2SYS; Potentiometric; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; The Antarctic; Antarc*; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.867479; https://doi.pangaea.de/10.1594/PANGAEA.867479

This study investigated the effects of long-term incubation to near-future combined warming (+2 °C) and ocean acidification (-0.3 and -0.5 pH units) stressors, relative to current conditions (-0.3 °C and pH 8.0), on the energetics of food processing in the Antarctic sea urchin, Sterechinus neumayeri. After an extended incubation of 40 months, energy absorbed, energy lost through respiration and lost as waste were monitored through two feeding cycles. Growth parameters (mass of somatic and gonad tissues and the CHN content of gonad) were also measured. There were no significant effects of combined ocean acidification (OA) and temperature stressors on the growth of somatic or reproductive tissue. Despite more food being consumed in the low temperature control, once food processing and maintenance costs were subtracted, there were no significant effects of treatment on the scope for growth. The biggest significant differences were between amounts of food consumed during the two feeding cycles. More food was consumed by the low temperature (0 °C) control animals, indicating a potential effect of the changed conditions on digestive efficiency. Also, in November, more food was consumed, with a higher absorption efficiency, which resulted in a higher scope for growth in November than September and may reflect increased energetic needs associated with a switch to summer physiology. The effect of endogenous seasonal cycles and environmental variability on organism capacity is discussed. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 is 2016-10-31.