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Effect of simulated ocean acidification on the acute toxicity of Cu and Cd to Tigriopus japonicus

Heavy metals pollution in marine environments has caused great damage to marine biological and ecological systems. Heavy metals accumulate in marine creatures, after which they are delivered to higher trophic levels of marine organisms through the marine food chain, which causes serious harm to marine biological systems and human health. Show More Summary

Combined effects of elevated CO2 and food limitation on early life stages of Clanus finmarchicus

The early life stages of Calanus finmarchicus were exposed to two levels of pCO2, 380 ppm (control) and 2080 ppm (elevated CO2) and two different food concentrations, ~ 600 µg C/L (high food concentration) and ~150 µg C/L (food limited). Carbon and nitrogen analysis were performed at the first feeding stage (nauplii stage 3), and […]

Scientists aim to boost research and observing on ocean acidification in region

Ongoing acidification of our oceans is threatening our marine life and ocean-based food security and the potentially dire effects of this trend are not properly understood, largely due to a lack of research and observing capacities. That was the consensus of 40 experts who gathered in Phuket, Thailand from 19-21 January 2015 to determine concrete […]

Interactive comment on “A metadata template for ocean acidification data” by L.-Q. Jiang et al.

I applaud the efforts of Jiang and colleagues. A metadata template is an essential tool to better manage ocean acidification data and would provide the scientific community with the required information to perform metaanalyses and syntheses. To achieve this goal, it is critical that the metadata template is approved and used by all major databases […]

What the hell is a “Sea Hawk” anyway?

               The Bird is the Word, but it’s the Wrong Word for the Right Bird It’s Superb Owl Sunday, and America is once again pitting two sets of millionaires against each other in a sanitized, televised, and heavily corporatized modern version of gladiatorial combat of eons passed. With the […]

1-31-15 When Last Heard Over the Hydrophones

Over the last few days: Thursday, January 29th...5:45 a.m. J pod, K pod, and a few L pod calls over the Lime Kiln hydrophones brought me to attention!...they sounded very clear, as if they were in Haro Strait, and were quite close......here's...Show More Summary

Spurious correlations: How Alaskan pollock predict a Seahawks Super Bowl win!

This is a guest post by Kirstin Holsman, who works on developing quantitative methods for ecosystem-based fisheries management and methods to assess and manage for climate-change impacts on fish and fisheries at the University of Washington Joint Institute for the Study of the Atmosphere and Ocean. This post is based on a great talk she gave this January […]

The winners and losers of ocean acidification

The population balance of some marine ‘pests’ could be drastically changed as the world’s oceans become increasingly acidic. Populations of certain types of marine organisms known collectively as the ‘biofouling community’ – tiny creatures that attach themselves to ships’ hulls and rocks – may quadruple within decades, while others may see their numbers reduced by […]

Secondary calcification and dissolution respond differently to future ocean conditions (update)

Climate change threatens both the accretion and erosion processes that sustain coral reefs. Secondary calcification, bioerosion, and reef dissolution are integral to the structural complexity and long-term persistence of coral reefs, yet these processes have received less research attention than reef accretion by corals. Show More Summary

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

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