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Ocean Roundup: Crabs Found to Look Out for Corals, 35,000 Walruses Gather on Alaskan Beach, and More

A crab of the genus Trapezia, which defends coral reefs from sea stars. (Photo: Richard Ling / Flickr Creative Commons) - New research shows that some coral may have natural “crab guards” that help them fight off predatory sea stars....Show More Summary

Are swimming zooplankton driving ocean currents? Sort of.

Biomixing, where the ocean is mixed by swimming animals, has long been a hot topic in oceanography. Some people think all that biological flapping and stroking could be a major source of oceanic turbulence. Others, not so much. But a new laboratory study by M. Wilhelmus and J. Dabiri from Caltech is certainly going to ignite scientists love […]

A story about fish, plastic debris and sex

This is a guest post by Chelsea Rochman. Chelsea is a post-doc at the University of California Davis. This is her fourth guest post at DSN, and the first one to come with this.  WARNING: Some content may not be acceptable for a younger audience. (Note from Miriam: It’s ok, Chelsea, nothing in this post is at all out of […]

A graveyard in the ocean … the end of coral as we know it?

Coral reefs are vanishing faster than rain forests. Why? Every day for the last decade, our ocean has absorbed roughly 22 million tons of carbon dioxide (CO2). This greenhouse gas, which humans generate by activities such as using electricity, developing land and driving cars, dissolves in the water. But it doesn’t vanish. It turns into […]

Effects of ocean acidification on the brown alga Padina pavonica: decalcification due to acute and chronic events

Since the industrial revolution, anthropogenic CO2 emissions have caused ocean acidification, which particularly affects calcified organisms. Given the fan-like calcified fronds of the brown alga Padina pavonica, we evaluated the acute...Show More Summary

Ocean acidification: Project Censored 2014

Ocean acidification tops the annual list of important stories ignored by the mainstream media. Our oceans are acidifying — even if the nightly news hasn’t told you yet. As humanity continues to fill the atmosphere with harmful gases, the planet is becoming less hospitable to life as we know it. The vast oceans absorb much […]

The Great Barrier Reef is becoming more fragile

Research undertaken at Australia’s Great Barrier Reef has found that coral reef skeletons are becoming less dense and more fragile. The study was led by Professor Jonathan Erez from Hebrew University of Jerusalem and Professor Boaz Lazar at Fredy and Nadine Hermann Institute of Earth Scientists, working with Carnegie Institute colleagues Dr J Silverman and […]

Recent Marine Fossil Discoveries Provide Insight on Ancient Ocean Inhabitants

Spinosaurus aegyptiacus skull, the first semi-aquatic dinosaur known to exist. (Photo: Didier Descouens / Wikimedia Commons) It’s no surprise that the oceans are home to some of the most fascinating animals, from the massive blue whale, the world’s largest animal, to creatures like octopus and squid that can change their coloration instantly. Show More Summary

Celebrate National Seafood Month with This Sustainable Recipe: Mussel Chowder

(Photo: Pete / Flickr Creative Commons) October 1 kicks off National Seafood Month, a time to raise awareness for sustainable fisheries and celebrate the benefits of seafood in one’s diet. Oceana focuses on sustainable seafood all year...Show More Summary

Ocean Roundup: Oceans Get a “D’ for Ocean Health, Beluga Whale Population Faces “Catastrophe,” and More

A beluga whale (Delphinapterus leucas). Beluga whales in the St. Lawrence River are declining. (Photo: Ansgar Walk / Wikimedia Commons) - The Ocean Health Index’s third annual ocean evaluation gave ocean health a “D,” or 67 out of 100. Show More Summary

An ecological and physiological assessment of tropical coral reef responses to past and projected disturbances

Tropical reef structure and topographical complexity is a product of coral morphology, which greatly enhances biodiversity, ecological function, and ecosystem services. However, reef-building corals have declined in cover by 50-80% in response to the accumulated effects of natural and anthropogenic disturbances over the last 3 to 4 decades. Show More Summary

Warming influences Mg2+ content, while warming and acidification influence calcification and test strength a sea urchin

We examined the long-term effects of near-future changes in temperature and acidification on skeletal mineralogy, thickness and strength in the sea urchin Tripneustes gratilla reared in all combinations of three pH (pH 8.1, 7.8, 7.6) and three temperatures (22 oC, 25 oC, 28 oC) from the early juvenile to adult, over 146 days. As the […]

9-30-14 More Food More Energy

Tuesday, September 30th...off the water for me on Monday... Monday evening...Tuesday... of course I was in town and got to the west side asap a bit north of Lime Kiln...in time to see Mike J-26 and Slick J-16 going up island...and then...Show More Summary

Arctic Sea Ice Found to Play Bigger Role in Global Carbon Cycle Than Assumed, Study Says

Arctic Ice. (Photo: Patrick Kelley, U.S. Coast Guard / U.S. Geological Survey / Flickr Creative Commons) It comes as no surprise that Arctic sea ice melt has a range of ecological and economic consequences, from hastening sea level rise to disrupting food chains. Show More Summary

Video: Rare Blue Whale Footage Captured Off California

Underwater footage of the blue whale (Balaenoptera musculus) off Laguna Beach. (Photo: Rich German / YouTube) While paddling off Laguna Beach recently, one lucky paddle boarder was in the right place at the right time to spot an elusive blue whale—an endangered marine mammal that’s rarely spotted. Show More Summary

Ocean Roundup: UN Sounds Alarm on Mangrove Disappearance, Brazil to Triple Marine Protected Areas, and More

Mangroves in Elbow Reef, Key Largo, Florida. The U.N. has issued a report warning about mangrove disappearance. (Photo: Oceana / Carlos Minguell) - Brazil is planning to triple its Marine Protected Areas from 5.5 million hectares to over 17.5 million—a project that’s worth more than $18 million. Show More Summary

Reminder: Scientists, contribute to the OA-ICC data compilation on the biological response to ocean acidification!

Numerous papers report the effects of ocean acidification on marine organisms and communities, but it has been difficult to compare the results since the carbonate chemistry and ancillary data are often reported in different units and scales, and calculated using different sets of constants. In response to this problem, a data compilation on the biological […]

Presentations on ocean acidification at the Climate Engineering Conference 2014

Prof. Dr. Hans-Otto Pörtner, Alfred Wegener Institute, Germany – minute 13 Prof. Dr. Jean-Pierre Gattuso, Laboratoire d’Océanographie, CNRS / Université Pierre et Marie Curie – minute 28 IASS Potsdam, via Youtube, 28 August 2014. Video. Filed under: Meetings, Presentations

9/27-28/14 Fish On the Head and In the Mouth!

Saturday/Sunday, September 27/28th...two mornings of fog that broke into beautiful sunny days with calm seas, awesome whales who were getting some food!...one morning the whales woke me up at about 5:15a.m. over the Lime Kiln hydrophones...the...Show More Summary

Live Action Role-Play for the Baltic Sea: Finding New Ways to Address Environmental Troubles

Baltic Sea project manager, Hanna Paulomäki, being attacked by “Viking Zombies”at the Baltic Warriors event. (Photo: Oceana) Earlier this month, Oceana in Europe’s Baltic Sea Project Manager Hanna Paulomäki attended an event in Finland that simulated “Viking Zomebies” as a way to raise awareness for the issues facing the Baltic Sea. Show More Summary

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