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A novel in situ system to evaluate the effect of high CO2 on photosynthesis and biochemistry of seaweeds

Previous studies of the impact of increased CO2 on macroalgae have mainly been done in laboratories or mesocosm systems, placing organisms under both artificial light and seawater conditions. In this study, macroalgae were incubated in situ in UV-transparent cylinders under conditions similar to the external environment. This system was tested in a short-term study (5.5 […]

The effect of UV light and CO2 in the production of polyunsaturated aldehydes in Skeletonema costatum (Bacillariophycea)

Skeletonema costatum was submitted to two experiments using UV lights and CO2with the purpose of observing changes in the lipids profile and the synthesis of polyunsaturated aldehydes (PUA) after cell disruption. When cells receive CO2 supply, it was noticed that the production of PUA was significantly lower. The same was observed when the culture was […]

CEO Note: Simon Sidamon-Eristoff Becomes Chairman of Oceana’s Board

The new chairman of Oceana’s board of directors, Simon Sidamon-Eristoff, and new vice chair, Valarie Van Cleave, are pictured at an Oceana event in 2012. (Photo: Carla Rhea) I am writing to you to introduce our new chairman for Oceana’s...Show More Summary

Humpback Whales’ Scars Help Explain their Migratory Patterns, Study Finds

Scars on humpback whale (Megaptera novaeangliae) flukes. (Photo: Jeff Li / Flickr Creative Commons) In the Southern Hemisphere, humpback whales migrate between feeding grounds around Antarctica to breeding grounds in tropical waters,...Show More Summary

Ocean Roundup: Male Galápagos Sea Lions Take More Time to Raise, Cosmetic Contaminants Found in Antarctica, and More

A Galápagos sea lion (Zalophus wollebaeki) pup. (Photo: Scott Ableman / Flickr Creative Commons) - Scientists say that chemicals in soaps, lotions, sunscreen, and other fragrances have made it to Antarctic waters. The scientists also...Show More Summary

OA-ICC December calendar: 5/12- “Observe this!”

Count down the days until 2015 together with the OA-ICC! Each day of December you will find a short story on the OA-ICC news stream highlighting an ocean acidification project, effort, or resource. Discover today’s story below: “Observe this!” GOA-ON To be able to understand ocean acidification we must first observe it! That’s where the […]

The global issue of ocean acidification will be represented at the United Nations Framework Convention on Climate Change 20th session of the Conference of the Parties (UNFCCC COP20) by world-leading marine research organisations, including PML

The ocean is under pressure from the multiple stressors of acidification, warming and deoxygenation and these issues will be highlighted at this annual international climate change conference, this year being held in Lima, Peru. As well as exhibiting the Hot, Sour and Breathless message, PML scientist and ocean acidification expert Dr Carol Turley will be […]

Waterways program features the impacts of ocean acidification on coral reefs

The latest episode of the educational television series “Waterways” features coral research conducted by NOAA scientists in the Florida Keys. As the global ocean becomes more acidic, NOAA is documenting these changes and their impact on organisms like corals. The first part of the episode entitled “Ocean Acidification & Tortugas Tide Gauge”   features AOML […]

Waterways Episode 276 – Ocean Acidification & Tortugas Tide Gauge (video)

One of the biggest threats to marine organisms is the phenomenon known as OCEAN ACIDIFICATION where because of increased CO2 in our waters, due to the burning of fossil fuels, has caused the ocean to become more acidic. This increase in acidity inhibits the ability for many corals and mollusks, including oysters and clams, in […]

Ocean acidification worse in coral reefs

The rate of ocean acidification in coral reefs outpaces the rise in carbon dioxide (CO2) in Earth’s atmosphere, indicating that anthropogenic carbon emissions alone are not to blame for the threat to coral reefs, a new study shows. Betz E. O., 2014. Ocean acidification worse in coral reefs. Eos, Transactions American Geophysical Union 95(48):452. Article.Filed […]

Study committee calls for Maine to act on ocean acidification

A report to legislators says more research and local efforts are needed to deal with the threat to shellfish, including lobsters and clams. AUGUSTA — Maine should increase research and monitoring into how rising acidity levels in oceans could harm the state’s valuable commercial fisheries while taking additional steps to reduce local pollution that can […]

Optical assessment of impact and recovery of sedimentary pH profiles in ocean acidification and carbon capture and storage research

Available methods for measuring the impact of ocean acidification (OA) and leakage from carbon capture and storage (CCS) on marine sedimentary pH profiles are unsuitable for replicated experimental setups. To overcome this issue, a novel optical sensor application is presented, using off-the-shelf optode technology (MOPP). Show More Summary

Shell’s Lawsuit against Environmental Groups Declared Unconstitutional by Appeals Court

Royal Dutch Shell’s Kulluk drilling rig is towed from Kiliuda Bay after running aground in December 2012. (Photo: U.S. Pacific Command / Flickr Creative Commons) Last month, the U.S. Court of Appeals for the Ninth Circuit Court rejected...Show More Summary

Ocean Roundup: More Orcas Converging near Puget Sound, Hawaii’s Coral Reef Ecosystems Found in Poor Condition, and More

Offshore orcas have been moving towards the Puget Sound. (Photo: Miles Ritter / Flickr Creative Commons) - Recently, “exotic orcas”—orcas that are typically found off California’s continental shelf—have been converging in unusually high numbers in the Strait of Juan de Fuca. Show More Summary

OMG I Thought You Were Dead!

I shouted with euphoric joy through my regulator, 20 feet underwater. I can only imagine how wide my eyes were. It must have been difficult to discern between an expression of delighted surprise and a textbook example of wide-eyed diver panic. My eyes were transfixed on an old friend with a funny name whom I […]

Rapid acclimation of juvenile corals to CO2-mediated acidification by up-regulation of HSP and Bcl-2 genes

Corals play a key role in ocean ecosystems and carbonate balance but their molecular response to ocean acidification remains unclear. The only previous whole transcriptome study (Moya et al. 2012) documented extensive disruption of gene expression, particularly of genes encoding skeletal organic matrix proteins, in juvenile corals (A. Show More Summary

Interactions of anthropogenic stress factors on phytoplankton

Phytoplankton are the main primary producers in aquatic ecosystems. Their biomass production and CO2 sequestration equals that of all terrestrial plants taken together. Phytoplankton productivity is controlled by a number of environmental factors, many of which currently undergo substantial changes due to anthropogenic global climate change. Show More Summary

Transgenerational effects alleviate severe fecundity loss during ocean acidification in a ubiquitous planktonic copepod

Ocean acidification (OA) caused by anthropogenic CO2 emission is projected for thousands of years to come, and significant effects are predicted for many marine organisms. While significant evolutionary responses are expected during such persistent environmental change, most studies consider only short term effects. Show More Summary

Interactive effects of ocean acidification and rising sea temperatures alter predation rate and predator selectivity in reef fish communities

Ocean warming and acidification are serious threats to marine life. While each stressor alone has been studied in detail, their combined effects on the outcome of ecological interactions are poorly understood. We measured predation rates and predator selectivity of two closely-related species of damselfish exposed to a predatory dottyback. Show More Summary

New research tool tracks changes in ocean acidification

A new research tool launched last week by the National Oceanic and Atmospheric Administration is allowing scientists to better track changes in ocean chemistry along the U.S. West Coast. The tool provides real-time ocean acidification data along the coast and in some protected bays. It captures data from a couple dozen sensors installed at shellfish […]

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