Secondary production, calcification and CO2 fluxes in the cirripedes Chthamalus montagui and Elminius modestus

摘要: Calcification, a process common to numerous marine taxa, has traditionally been considered be significant source of CO2 in tropical waters only. A number relatively recent studies, however, have shown that amounts are also produced temperate waters, although none these studies was carried out on rocky shores, which very productive systems. We compared the fluxes due respiration and calcification two species, cirripedes Chthamalus montagui Elminius modestus. The population dynamics both species were estimated at sites during 1-year experimental period order establish mean organic (ash-free dry weight) CaCO3 (dry shell production. Based parameters, we calcification. production 481.0 $$ {\text{1,803}}{\text{.9}}\,{\text{g}}_{{{\text{CaCO}}_{{\text{3}}} }} \,{\text{m}}^{{ - 2}} \,{\text{year}}^{{ 1}} $$ each site, representing 3.4 {\text{12}}{\text{.7}}\,{\text{mol}}_{{{\text{CO}}_{{\text{2}}} respectively, released CO2. These represent 47% as result high-density site was: (1) among highest values obtained for organisms, (2) comparable coral reefs. As calcifying organisms well represented ecosystems terms density biomass, our results provide clear evidence should not underestimated. Additional other shore taxa needed before relative importance intertidal carbon budgets can generalized.