Seawater carbonate chemistry, fertilization rate and biological processes of sea urchin Paracentrotus lividus during experiments, 2011

• Main Authors: Moulin, Laure, Catarino, Ana Isabel, Claessens, Thomas, Dubois, Philippe
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Alkalinity; Gran titration (Gran; 1950); total; Animalia; Aragonite saturation state; Behaviour; Benthic animals; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (<20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Conductivity meter (WTW; Weilheim; Gemany); Development; Echinodermata; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Experimental treatment; Fertilization success rate; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Identification; Laboratory experiment; Metrohm Titrando titrator; Microscopy; Paracentrotus lividus; cleavage rate; larvae; pluteus; rod size; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Reproduction; Salinity; Ocean acidification
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.763905; https://doi.org/10.1594/PANGAEA.763905

The effect of pH ranging from 8.0 to 6.8 (total scale - pHT) on fertilization, cleavage and larval development until pluteus stage was assessed in an intertidal temperate sea urchin. Gametes were obtained from adults collected in two contrasting tide pools, one showing a significant nocturnal pH decrease (lowest pHT = 7.4) and another where pH was more stable (lowest pHT = 7.8). The highest pHT at which significant effects on fertilization and cleavage were recorded was 7.6. On the contrary, larval development was only affected below pHT 7.4, a value equal or lower than that reported for several subtidal species. This suggests that sea urchins inhabiting stressful intertidal environments produce offspring that may better resist future ocean acidification. Moreover, at pHT 7.4, the fertilization rate of gametes whose progenitors came from the tide pool with higher pH decrease was significantly higher, indicating a possible acclimatization or adaptation of gametes to pH stress.