Blog Profile / Ocean Acidification


URL :http://oceanacidification.wordpress.com
Filed Under:Biology / Marine Biology
Posts on Regator:7425
Posts / Week:19.4
Archived Since:July 23, 2010

Blog Post Archive

IAEA discusses ocean change together with partner UN agencies at COP23

The IAEA participated in a UN Oceans side-event at the United Nations Framework Convention on Climate Change (UNFCCC) COP23 in Bonn on ocean and climate entitled “A Resilient Ocean for Future Generations”. The objective of the 11 November side-event was to present actions that countries are taking, with the support of the UN system, to […]

Elevated toxic effect of sediments on growth of the harmful dinoflagellate Cochlodinium polykrikoides under high CO2

Ocean acidification will likely have significant impacts on phytoplankton growth in marine ecosystems over the course of this century. Coastal waters, which can be strongly influenced by suspended sediments, can also be particularly sensitive to ocean acidification. Show More Summary

Variations to calcareous nannofossil CaCO3 content during the middle Eocene C21r-H6 hyperthermal event (~ 47.4 Ma) in the Gorrondatxe section (Bay of Biscay, western Pyrenees)

Highlights • Dissolution on the seabed occurred during some of the Eocene hyperthermal events. • The CaCO3 mass of Chiasmolithus solitus decreased by 50% over the C21r-H6 event. • Lysocline rose to 1500 m paleobathymetry in the Bay of Biscay. • Formation of corrosive bottom water in the North Atlantic Ocean raised the lysocline. Abstract The […]

Advances in in-situ ocean measurements

This chapter focuses on recent advances in in-situ ocean measurements. Recent interest in the ocean’s response to and impact on climate change has encouraged the development of improved sensor technologies for measuring oceanic parameters such as conductivity, temperature, dissolved oxygen and pH. Show More Summary

Oceans of impact: challenges to actions

The ocean covers nearly three quarters of the Earth’s surface, contains 96% of its living space, harbours enormous biological and genetic diversity, provides around half of the oxygen in the atmosphere and is an increasingly important source of protein for a rapidly growing world population. However, human activity is having an impact on this precious […]

A user’s guide for selected autonomous biogeochemical sensors

The guide presents a final outcome of the 1st International IOCCP Sensors Summer Course held in 2015 in Kristineberg, Sweden. This user’s guide provides easy-to-follow steps on the usage (including preparation, deployment, recovery and basic data processing) of selected autonomous biogeochemical sensors which measure oxygen, nitrate, pCO2 and pH. Show More Summary

Carbon uptake and biogeochemical change in the Southern Ocean, south of Tasmania (update)

Biogeochemical change in the water masses of the Southern Ocean, south of Tasmania, was assessed for the 16-year period between 1995 and 2011 using data from four summer repeats of the WOCE–JGOFS–CLIVAR–GO-SHIP (Key et al., 2015; Olsen et al., 2016) SR03 hydrographic section (at ??140°?E). Changes in temperature, salinity, oxygen, and nutrients were used to […]

Mussel larvae modify calcifying fluid carbonate chemistry to promote calcification

Understanding mollusk calcification sensitivity to ocean acidification (OA) requires a better knowledge of calcification mechanisms. Especially in rapidly calcifying larval stages, mechanisms of shell formation are largely unexplored—yet these are the most vulnerable life stages. Show More Summary

The effects of eutrophication and acidification on the ecophysiology of Ulva pertusa Kjellman

In coastal environments, acidification and eutrophication affect the physiology of marine macroalgae. We investigated the responses of Ulva pertusa Kjellman (Ulvales, Chlorophyta) under such conditions. Samples were cultured at two different...Show More Summary

Ocean acidification and Pacific oyster larval failures in the Pacific Northwest United States

The Pacific Northwest coast of the United States (Figure 2.1) is home to a lucrative shellfish aquaculture industry that grows mainly (>80 percent) (Barton, et al. 2012) Pacific oysters (Crassostrea gigas). Washington States is the center of this industry. Its hatcheries produce oyster larvae, or spat, that are shipped all over the West Coast to […]

Meta-analysis identifies metabolic sensitivities to ocean acidification

Ocean acidification is expected to have wide-ranging and complicated impacts on organismal physiology, notably metabolism. Effects on metabolism may have numerous consequences at the whole-organism level, in particular costs to growth, locomotion, reproductive output, and homeostasis. Show More Summary

Tidal and seasonal variation in carbonate chemistry, pH and salinity, for a mineral-acidified tropical estuarine system

Highlights • This paper describes tidal fluxes and seasonal patterns in pH, salinity and carbonate chemistry attributes for a tropical Southeast Asian estuary, when heterotrophically generated CO22 and mineral acidification (through Acid Sulphate Soil (ASS) discharge) are likely to be of greater or lesser importance. Show More Summary

In situ detection of species relevant to the carbon cycle in seawater with submersible potentiometric probes

We report on the development of a submersible probe for the simultaneous potentiometric detection of carbonate, calcium, and pH in seawater. All-solid-state electrodes incorporating nanomaterials provide an adequate response time (

Extreme ocean acidification reduces the susceptibility of eastern oyster shells to a polydorid parasite

Ocean acidification poses a threat to marine organisms. While the physiological and behavioural effects of ocean acidification have received much attention, the effects of acidification on the susceptibility of farmed shellfish to parasitic infections are poorly understood. Show More Summary

Training on ocean acidification and first biological experiments in Costa Rica

PhD candidate Celeste Sánchez Noguera from the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica and Dr. Sam Dupont from the University of Gothenburg met for the first time in Tasmania in May 2016 at the 4th Symposium on the Ocean in a High CO2 World and […]

Our view: ocean acidity threat warrants stronger state response

In 2014, with rising ocean acidity threatening Maine’s fishing and aquaculture industries, a state commission issued a series of recommendations for localized research that was delivered with optimism. “While scientific research on the...Show More Summary

The other CO2 problem

Marine life is threatened by the actions of humankind; overfishing is killing off some aquatic species to the point of endangerment; fertiliser run-off is polluting water courses leading to algal blooms and eutrophication; vast swathes of mangrove forests have been cleared to make way for shrimp farming. To make matters worse, a recent key report suggests […]

MoDIE: moderate dissolved inorganic carbon (DI13C) isotope enrichment for improved evaluation of DIC photochemical production in natural waters

Highlights • MoDIE allows analysis of very small DIC changes against large seawater background. • MoDIE eliminates DIC-stripping to quantify photoproduced DIC in natural waters. • Initial DIC photoproduction rates in blue water are reported using MoDIE. Show More Summary

The effect of elevated carbon dioxide on the sinking and swimming of the shelled pteropod Limacina retroversa

Shelled pteropods are planktonic molluscs that may be affected by ocean acidification. Limacina retroversa from the Gulf of Maine were used to investigate the impact of elevated carbon dioxide (CO2) on shell condition as well as swimming and sinking behaviours. Limacina retroversa were maintained at either ambient (ca. 400 µatm) or two levels of elevated CO2 […]

Ocean acidification: climate change’s evil twin

A recent report shows rising CO2 levels in the atmosphere are about to make the world’s oceans uninhabitable for many sea creatures, threatening entire ocean ecosystems. What can be done? Life on Earth began at sea. Over the billions of years since, the oceans have sustained a myriad of species, from world’s biggest mammals to […]

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