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Acidification effects on biofouling communities: winners and losers

How ocean acidification affects marine life is a major concern for science and society. However, its impacts on encrusting biofouling communities, that are both the initial colonizers of hard substrata and of great economic importance, are almost unknown. Show More Summary

Reef Roulette

Isn’t coral reef conservation hard enough without having to also constantly re-invent yourself for every swing of the funding pendulum? Well your friends here at Deep Sea News sympathize, so we’ve come up with this handy online answer to your restricted funding woes! Simply spin the wheels below to select your Reef Threat, your Brand […]

1-28-15 K-12 Is Ready for the Big Game

Wednesday, January 28th Sequim K-12... just had to get her in on the fun...hanging off the flag are salmon - she doesn't want you to forget about how much they need salmon! Sequim is the only living whale in the Southern Resident Community with a number 12. Show More Summary

Effects of ocean acidification on larval development and early post-hatching traits in Concholepas concholepas (loco)

Larval stages represent a bottleneck influencing the persistence of marine populations with complex life cycles. Concholepas concholepas is a gastropod species that sustains the most important small-scale artisanal fisheries of the Chile-Peru Humboldt Coastal current system. Show More Summary

Continuous monitoring of in vivo chlorophyll a fluorescence in Ulva rigida (Chlorophyta) submitted to different CO2, nutrient and temperature regimes

A Monitoring-PAM fluorometer with high temporal resolution (every 5 min) was used to assess the effects on photosynthesis in Ulva rigida (Chlorophyta) during exposure to 2 different CO2 conditions: current (‘LC’, 390 ppm), and the predicted level for the year 2100 (‘HC’, 700 ppm) in a crossed combination with 2 different daily pulsed nitrate concentrations […]

Mass-transfer gradients across kelp beds influence Macrocystis pyrifera growth over small spatial scales

Nitrogen is essential for algal productivity but often reaches limiting concentrations in temperate ecosystems. Increased water motion enhances nitrogen uptake by decreasing the thickness of the diffusion boundary layer surrounding algal surface tissue, allowing for increased nitrogen mass-transfer across this boundary. Show More Summary

Glacial melt could change chemistry and food web in world’s oceans

Along with increasing sea levels, melting glaciers are putting something else into the world’s oceans — a huge load of organic carbon that has the potential to change marine chemistry and ecosystems, says a newly published study by a team of mostly Alaska scientists. (…) The accelerated melt of glaciers gets attention because of its […]

Oceans face higher acidity levels as more man-made CO2 gets absorbed

Just about 5 million tons of carbon dioxide (CO2) is dumped into the atmosphere every hour from the burning of fossil fuels mostly for transportation, electrical generation, industry and heating. This is the fastest rate of CO2 generation that the earth has experienced in millions of years. It’s been estimated that about a quarter of […]

Experts: include ocean acidification in climate change negotiations

Monaco – Actions to mitigate and adapt to ocean acidification in a future global climate deal could make the agreement stronger and facilitate its implementation. That was one of the conclusions from last week’s international workshop on ocean acidification organised by the IAEA in Monaco. Scientists aren’t alone in raising the threat from ocean acidification; […]

Acid in seas and mudflats threatens to wipe out local shellfish populations

56 million years ago, a massive release of carbon dioxide into the atmosphere and oceans caused a monumental shift in the climate, increasing the earth’s surface temperature by 11 degrees. Meanwhile, a rapid chemical change in the ocean occurred as the gas and water formed carbonic acid, eventually causing the extinction of all of the […]

Seasonality of sea ice controls interannual variability of summertime ?A at the ice shelf in the Eastern Weddell Sea – an ocean acidification sensitivity study

Increasing anthropogenic CO2 is decreasing surface water aragonite saturation state (?A), a growing concern for calcifying Euthecosome pteropods and its wider impact on Antarctic ecosystems. However, our understanding of the seasonal cycle and interannual variability of this vulnerable ecosystem remains limited. Show More Summary

Special chambers simulate ocean acidification in Antarctica (text & audio)

BRENDAN TREMBATH: Scientists from the Australian Antarctic Division have built special underwater chambers to test what will happen when the ocean becomes more acidic. Increases in carbon dioxide in the atmosphere are absorbed by the ocean, making sea water more acidic. The experiment being conducted under the sea ice at Casey station this summer is […]

1-24-15 One Call That's All

Saturday, January 24th...the word on January 23rd, late in the day, was that many whales were inbound......that was over the Lime Kiln hydrophones......that's all they told us as far as I know!

A Year in the Life of the Bowhead Whale

Ever wonder what Bowhead whales, the only baleen whale that spends it’s entire life in the Arctic and sub-arctic, do all year round? Well now you can find out by watching this gorgeous new movie put together by Native Alaskans, marine scientists and the Museum of the North at the University of Alaska. I just watched the […]

L’acidification des océans en question à Monaco (video, in French)

C’est à Monaco en 2009 qu’une déclaration a tout d’abord alerté sur ce phénomène inquiétant : l’acidification des océans. S.A.S. le Prince Albert II a présidé cette conférence au Musée Océanographique, réunissant de nombreux participants venus du monde entier. Tous ont échangé pour trouver des solutions afin d’améliorer la situation des populations côtières, de la […]

Changing ocean chemistry imperils ecosystem (video)

Fisheries in Peruvian Pacific struggle to keep up with demand amid rising sea temperatures and ocean acidification. More than one billion people in the world rely on food harvested from the ocean. But global fisheries – already stretched by overfishing – are now threatened by rising sea temperatures and ocean acidification. Al Jazeera’s Nick Clark […]

Strategies to thwart ocean acidification

Taylor Shellfish in Washington state is circumventing the effects of ocean acidification – thanks in part to expanded hatchery facilities in Hawaii; units for juveniles at a de-commissioned pulp and paper mill in Humboldt Bay, California; and state officials who are paying attention. Company spokesperson Bill Dewey told HI that Taylor Shellfish now has three […]

A metadata template for ocean acidification data

This paper defines the best practices for documenting ocean acidification (OA) metadata and presents a framework for an OA metadata template. Metadata is structured information that describes and locates an information resource. It is the key to ensuring that a data set will survive and continue to be accessible into the future. With the rapid […]

Response to pH stress in the reef-building coral Pocillopora capitata (Anthozoa: Scleractinia)

To evaluate the metabolic response of the symbiotic coral Pocillopora capitata to reduced seawater pH in an in vitro system, 112 branches of P. capitata with no apparent damage from bleaching were collected from the La Boquita (LB) coral community. Two pH treatments were evaluated: a) pH 7.85/7.95 (Treatment C1), b) 7.60/7.70 (Treatment C2), and […]

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