Effect of CO2-related acidification on aspects of the larval development of the European lobster, Homarus gammarus (L.)
Other literature type
Arnold, K. E.
Findlay, H. S.
Spicer, J. I.
Daniels, C. L.
(issn: 1726-4189, eissn: 1726-4189)
Oceanic uptake of anthropogenic CO<sub>2</sub> results in a reduction in pH termed
"Ocean Acidification" (OA). Comparatively little attention has been given
to the effect of OA on the early life history stages of marine animals.
Consequently, we investigated the effect of culture in CO<sub>2</sub>-acidified
sea water (approx. 1200 ppm, i.e. average values predicted using IPCC 2007
A1F1 emissions scenarios for year 2100) on early larval stages of an
economically important crustacean, the European lobster <i>Homarus gammarus</i>. Culture in
CO<sub>2</sub>-acidified sea water did not significantly affect carapace length of
<i>H. gammarus</i>. However, there was a reduction in carapace mass during the final stage of
larval development in CO<sub>2</sub>-acidified sea water. This co-occurred with a
reduction in exoskeletal mineral (calcium and magnesium) content of the
carapace. As the control and high CO<sub>2</sub> treatments were not
undersaturated with respect to any of the calcium carbonate polymorphs
measured, the physiological alterations we record are most likely the result
of acidosis or hypercapnia interfering with normal homeostatic function, and
not a direct impact on the carbonate supply-side of calcification <i>per se</i>. Thus
despite there being no observed effect on survival, carapace length, or
zoeal progression, OA related (indirect) disruption of calcification and
carapace mass might still adversely affect the competitive fitness and
recruitment success of larval lobsters with serious consequences for
population dynamics and marine ecosystem function.