Biogenic acidification drives density-dependent growth of a calcifying invertebrate in culture

Abstract

Our results show that reduced capacity of culture water to buffer acidification (low A T ) can be a limiting factor in intensive production of calcifying marine invertebrates. This study demonstrates the importance of considering the influence of biogenic CO 2 on seawater carbonate chemistry in aquaculture, particularly given the threat of reduced pH of source water due to ocean acidification, and also in experiments investigating the influence of anthropogenic CO 2 .

Interactive effects of oyster and seaweed on seawater dissolved inorganic carbon systems: implications for integrated multi-trophic aquaculture

“…Seawater CO 3 2− can affect the ability of calcifying organisms to precipitate CaCO 3 (Gazeau et al 2007, Zhang et al 2011, Dineshram et al 2013, Li et al 2013, Mos et al 2015, McGrath et al 2016. However, in the present experiment, no significant differences in calcification rate were found among the different density treatments (Fig.…”

Somatic growth and gonadal development of Paracentrotus lividus (Lamarck, 1816) fed with diets of different ingredient sources

“…The relatively low GSI observed could be related with some degree of biogenic acidification in the rearing system. The biogenic acidification occurs due to reduction of rearing system pH, reduced calcite saturation state and increasing ρCO 2 which are critical when rearing calcified organisms (Stumpp et al, 2012;Mos et al, 2015). Despite the low initial density (98 g m -2 ) and relatively high exchange rate (3.75 per hour), the acidified characteristics of the seawater used (well seawater) and the hypothetical accumulation of CO 2 in the system could have a negative impact in the gonad growth due to unbalanced carbonate chemistry within the RAS system as reported for T. gratilla.…”

Indirect effects of ocean acidification drive feeding and growth of juvenile crown-of-thorns starfish, Acanthaster planci

“…of juveniles among treatments at the beginning of the experiment. At the end of the experiment (6 weeks), diameter measurements were used to calculate linear growth rates (LGRs), and area measurements were used to calculate specific growth rates (SGRs), using standard formulae [37]. LGR and SGR calculated for each replicate were used as data points for statistical analyses.…”