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New peer-reviewed papers

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Oct 24, 2014 4:16 AM
Acidification effects in the behavioural responses of temperate reef fish larvae
Due to anthropogenic activity, atmospheric CO2 levels have been increasing since the last century. Consequently, the average levels of surface pH in the ocean is drastically dropping, affecting marine life, including changes in fish behaviour. In many coastal marine fish the selection of the adult habitat occurs in the pelagic larval phase, relying on hearing […]

Oct 23, 2014 3:33 AM
Responses of coccolithophores to ocean acidification: a meta-analysis
Concerning their sensitivity to ocean acidification, coccolithophores, a group of calcifying single-celled phytoplankton, are one of the best-studied groups of marine organisms. However, in spite of the large number of studies investigating coccolithophore physiological responses to ocean acidification, uncertainties still remain due to variable and partly contradictory results. In the present study we have used […]

Oct 22, 2014 5:17 AM
Distribution of total alkalinity and pH in the Ross Sea (Antarctica) waters during austral summer 2008
Measurements of total alkalinity (AT) and pH were made in the Ross Sea in January–February 2008 in order to characterize the carbonate system in the Ross Sea and to evaluate the variability associated with different water masses. The main water masses of the Ross Sea, Antarctic Surface Water, High Salinity Shelf Water (HSSW), Deep Ice […]

Oct 22, 2014 5:00 AM
Projected near-future CO2 levels increase activity and alter defensive behaviours in the tropical squid Idiosepius pygmaeus
Carbon dioxide (CO2) levels projected to occur in the oceans by the end of this century cause a range of behavioural effects in fish, but whether other highly active marine organisms, such as cephalopods, are similarly affected is unknown. We tested the effects of projected future CO2 levels (626 and 956 µatm) on the behaviour […]

Oct 22, 2014 4:45 AM
Solar UV irradiances modulate effects of ocean acidification on the coccolithophorid Emiliania huxleyi
Emiliania huxleyi, the most abundant coccolithophorid in the oceans, is naturally exposed to solar UV radiation (UVR, 280-400 nm) in addition to photosynthetically active radiation (PAR). We investigated the physiological responses of E. huxleyi to present-day and elevated CO2 (390 vs 1000 μatm; with pHNBS 8.20 vs 7.86) under indoor constant PAR and fluctuating solar […]

Oct 22, 2014 4:15 AM
Empirical evidence reveals seasonally dependent reduction in nitrification in coastal sediments subjected to near future ocean acidification
Research so far has provided little evidence that benthic biogeochemical cycling is affected by ocean acidification under realistic climate change scenarios. We measured nutrient exchange and sediment community oxygen consumption (SCOC) rates to estimate nitrification in natural coastal permeable and fine sandy sediments under pre-phytoplankton bloom and bloom conditions. Ocean acidification, as mimicked in the […]

Oct 21, 2014 3:38 AM
Natural volcanic CO2 seeps reveal future trajectories for host–microbial associations in corals and sponges
Atmospheric carbon dioxide (CO2) levels are rapidly rising causing an increase in the partial pressure of CO2 (pCO2) in the ocean and a reduction in pH known as ocean acidification (OA). Natural volcanic seeps in Papua New Guinea expel 99% pure CO2 and thereby offer a unique opportunity to explore the effects of OA in […]

Oct 21, 2014 3:21 AM
Aragonite undersaturation in Gwangyang Bay, South Korea: Effects of fresh water input
Dissolved inorganic carbon (DIC) and alkalinity were precisely measured for surface and bottom waters in Gwangyang Bay, Korea, during the four seasons to assess seasonal variations of aragonite saturation state (Ωarag). Both the surface and bottom waters were undersaturated with respect to aragonite during summer but were supersaturated during the other seasons. The summertime undersaturation […]

Oct 21, 2014 3:07 AM
Best practices for autonomous measurement of seawater pH with the Honeywell Durafet
Performance of autonomous pH sensors is evaluated by comparing in situ data to independent bench-top measurements of pH and to co-located pH, O2, and View the MathML sourcepCO2 sensors. While the best practice is always to deploy a properly calibrated sensor, the lengthy time period required for sensor conditioning and calibration often results in sensor […]

Oct 21, 2014 2:53 AM
Responses of calcification of massive and encrusting corals to past, present, and near-future ocean carbon dioxide concentrations
In this study, we report the acidification impact mimicking the pre-industrial, the present, and near-future oceans on calcification of two coral species (Porites australiensis, Isopora palifera) by using precise pCO2 control system which can produce acidified seawater under stable pCO2 values with low variations. In the analyses, we performed Bayesian modeling approaches incorporating the variations […]