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Ocean acidification at high latitudes: the Bellweather. A model for the relationship between light intensity and the rate of photosynthesis in phytoplankton. Dependence of consumers on macroalgal (Laminaria solidungula) carbon in an arctic kelp community: δ 13C evidence.
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Is ocean acidification an open-ocean syndrome? Understanding anthropogenic impacts on seawater pH.
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A comparison of the equilibrium constants for the dissociation of carbonic acid in seawater media. Experimental evaluation of ecological dominance in a rocky intertidal algal community.
#ARTICLES OF THE TIDAL POOLS .GOV SERIES#
Marine Ecology Progress Series 383: 127–140.ĭayton, P. High carbon demand of dominant macrozoobenthic species indicates their central role in ecosystem carbon flow in a sub-Arctic fjord. The Arctic Ocean marine carbon cycle: evaluation of air-sea CO2 exchanges, ocean acidification impacts and potential feedbacks. Meroplankton larvae are exposed to ocean acidification until they settle in vegetated tidal pools, where they benefit from the protection offered by the “macroalgae-carbonate saturation state” interaction favouring calcification rates.īates, N.R., and J.T. Arctic tidal pools promote intense metabolism, creating conditions suitable for calcification during the Arctic summer, and can, therefore, provide refugia from ocean acidification to vulnerable calcifiers as extended periods of continuous light during summer are conducive to suitable conditions twice a day. Net calcification averaged 9.6 ± 5.6 μmol C kg −1 h −1 and was strongly and positively correlated with calculated net ecosystem production rates, which averaged 27.5 ± 8.6 μmol C kg −1 h −1. The corresponding Ω arag reached 5.04 ± 0.49 in the pools as compared to 1.55 ± 0.02 in the coastal waters flooding the pools. The intense photosynthetic activity of the seaweeds resulted in the drawdown of pCO 2 concentrations in the pools during the day to levels down to average (±SE) values of 66 ± 18 ppm, and a minimum recorded value of 14.7 ppm, corresponding to pH levels as high as 8.69 ± 0.08, as compared to CO 2 levels of 256 ± 4 and pH levels of 8.14 ± 0.01 in the water flooding the pools during high tide. O 2 concentrations in the tidal pools were elevated relative to those in the adjacent open waters, by up to 11 mg O 2 L −1, and exhibited heavy super-saturation (up to > 240%) during daytime emersion, reflecting intense and sustained photosynthetic rates of the tidal macroalgae. The tidal pools exhibited steep diurnal variations in temperature from a minimum of about 6 ☌ during the night to a maximum of almost 18 ☌ in the afternoon, while the temperature of the surrounding shore water was much lower, typically in the range 3 to 8 ☌. The hypothesis that Arctic tidal pools provide environmental conditions suitable for calcifiers during summer, thereby potentially providing refugia for calcifiers in an acidifying Arctic Ocean, was tested on the basis of measurements conducted during two midsummers (20) in tidal pools colonised by a community composed of macroalgae and calcifiers in Disko Bay, Greenland (69° N).