An international consortium has been formed to study the potential effects of adding iron to the ocean to promote the growth of phytoplankton. Phytoplankton use carbon dioxide from the atmosphere and ocean fertilization might therefore be a way of mitigating the effects of global warming. When phytoplankton die, organic carbon sinks to the seafloor where it may remain for decades, centuries or even longer – we still do not now much about the time-line.

Iron fertilization of the ocean is far from uncontroversial, since it is very difficult to foresee the long term effects of such a project. The international consortium, which has been named In-Situ Iron Studies (ISIS) consortium , will carry out iron fertilization experiments in the open ocean in an effort in to answer some of the questions regarding how iron affects the ocean’s capacity for dragging carbon dioxide from the air and into the water. All experiments will adhere to the London Convention/London Protocol regarding ocean iron fertilization research.

“A great deal remains to be learned about ocean iron fertilization and how effective it could be in storing carbon dioxide in the oceans, and the formation of this consortium is an important first step,” says Lewis Rothstein, professor of oceanography at the University of Rhode Island. “This is not a call for climate engineering; on the contrary this is a research consortium. It is premature to advocate for large-scale ocean iron fertilization, but it is time to conduct a focused research experiment that will examine the concept as comprehensively as we can. We want to make sure that it doesn’t generate harmful side effects that might negatively affect the marine ecosystem.”

The twelve ISIS-members are the following:
University of Rhode Island, USA
University of Hawaii, USA
University of Illinois at Urbana-Champaign, USA
University of Maine, USA
University of Massachusetts Boston, USA
University of Plymouth, UK
Xiamen University, Fujian, China
The Antarctic Climate and Ecosystems Cooperative Research Centre, Australia
Netherlands Institute for Sea Research, The Netherlands
The National Oceanography Centre, UK
Moss Landing Marine Laboratories, California, USA
Woods Hole Oceanographic Institution, Massachusetts, USA

The deep sediment cores brought up from the sea floor of the Bering Sea have shown that the area was devoid of ice the entire year, and the amount of biological activity was high during the last warm period in the history of the Earth.

Professor of ocean sciences at the University of California , Christina Ravelo, is going to share these incredible findings during a presentation this December 13th at the fall reunion of the American Geophysical Union in San Francisco. Ravelo and her right hand man Kozo Takahashi of Kyushu University in Japan went on a two month journey aboard their research boat dubbed “JOIDES Resolution”. The crack team of scientists bore down seven hundred meters through the rock and mud to get sediments which fell there during the Pliocene Warm Period, which took place some three and a half to four and a half million years ago.
“Evidence from the Pliocene Warm Period is relevant to studies of current climate change because it was the last time in our Earth’s history when global temperatures were higher than today,” Ravelo explained.

The levels of carbon dioxide during the Pliocene Warm Period were pretty similar to today, and the temperatures on the whole were a few degrees more, she went on. The researchers of climate have an interest in what this warm period might be able to tell us about global warming, especially when it comes to the poles.

Ravelo and her team found evidence that the poles were also getting warmer in the Pliocene Warm Period. By taking a look at the sediment samples they can calculate the average temperatures of the sea, and the Bering Sea was at least five degrees warmer than it is today, while the average temperatures were only three degrees warmer than today.

Maybe we will finally get some insight into the whole polar ice melting question, as it didn’t happen then, so maybe we have evidence that it won’t happen now…

walrus

There was a story which was written in the Arizona Daily Star which says “Tens of thousands of walruses have come ashore in northwest Alaska because the sea ice they normally rest on has melted. Federal scientists say this massive move to shore by walruses is unusual in the United States”. The “federal scientists” which the story mentions are supposed to be from the USGS, the U.S. Geological Survey. Since when have they been right about anything?

If you ask the FWS, the U.S. Fish and Wildlife Service, this coming of the walruses is not so far out there, and definitely not unusual.

That walrus of the Pacific makes its home in the shallow waters of the continental shelf of the Chukchi and Bering seas. The actual distribution of the population Pacific walruses actually varies greatly season to season. Almost all of the population makes its home in the pack ice in the Bering sea during the cold winter months. During the winter, they most often stake their claim in two areas, one to the southwest of St. Lawrence Island, and in outer Bristol Bay.

Now, as the Bering Sea pack ice begins to melt down in April, the walruses of course move further north and their population becomes less dense. Some of these walruses inevitably make their way to the shores, perhaps to take in the renowned local hospitality, and this has been the pattern for a long time, and will continue to be in the coming years.

Oyster bed

There’s no need to worry – oyster herpes is not transferable to humans by eating “the food of love”.

This incurable, not to mention deadly, virus is a grave concern to the fishing communities in Europe. Oyster herpes is on the rise in Europe, and could go on spreading itself out even further, should the seas continue to get warmer, experts warn.

This past July farmed oysters were tested and the first known United Kingdom cases of herpes was detected in shellfish. This virus has already made its mark, killing somewhere between 20 and 100 percent of the breeding pacific oysters in some French beds from 2008 until 2010, according to, Ifemer, the French Research Institute for Exploitation of the Sea.

The reason that oyster herpes has been emerging more in Pacific oysters off of England still has scientists stumped, however many are speculating that Global Warming has something to do with it.

A new strain of Oyster herpes (Ostreid herpesvirus), remains dormant until the temperature of the water exceeds 16 degrees Celsius. UK waters reach this temperature in the height of summer, according to a member of the British government’s Fish Health Inspectorate, Kevin Denham.

Keeping that fact in mind, the director of Ifemer’s genetic and pathology lab, Tristan Renault, has commented that global warming “could be an explanation of the appearance of this particular type of virus.”

Though all of the herpes strains are DNA-based viruses, herpes, which infects everything from elephants to chickens to monkeys, comes in an astonishing number of species, each with their own distinct set of symptoms.

In humans, the best known forms of herpes are the Herpes simplex viruses, which spread through close contact and can produce symptoms such as oral and genital blisters.

Ostreid herpes viruses have been shown to affect not only oysters, but also scallops, clams and other scallops, explains Renault.

New Oyster Herpes

Shellfish who are infected with herpes are not new to the scientific world, however, in 2008 – the first year where there was a marked increase in the mortality rates detected in France – Ifremer stumbled upon a new strain of the virus.

Much like the other strains of the oyster herpes virus which infect mollusks, this new strain singles out younger oysters during the breeding season when the bodies of the mollusks’ are focusing all their energy on producing sperm and eggs, leaving them without enough energy to maintain their immune system Renault explains.

However, this new strain of oyster herpes is “more virulent than strains we have identified before,” Renault continued, adding that the virus is extremely efficient when it comes to killing its hosts, and can eradicate 80 percent of the oysters in a bed inside a week.

The most starting thing about this new strain of oyster herpes, is that the only visible sign there is something amiss, is the mortality rate, because oyster herpes does not have any visible symptoms, and can only be diagnosed through a lab test.

The temperature of the ocean is key in determining just how productive and how much biodiversity there is in the ocean and also where it is.

There have been two separate studies in which researchers discovered that the ocean heating up has caused a massive decline in the amount of plant life in the ocean over the past 100 years. The studies also indicated that there is a link between the ambient temperature of the water of the ocean and the different patterns of marine biodiversity.

“We are just now understanding how deeply temperature affects ocean life,” explained Boris Worm, a biologist of Dalhousie University, and also co-author on both reports published in the July 28 edition of Nature. “It is not necessarily that increased temperature is destroying biodiversity, but we do know that a warmer ocean will look very different.”

In one of the studies performed which took a look at the historical amounts of algae concentrations over the last century, Worm and his associates have discovered that the rising temperatures of the oceans are directly related to the massive decline in marine algae, commonly know in scientific circles as phytoplankton. These phytoplankton also happen to be the base of the food chain for the ocean, and were responsible for creating oxygen on Earth.

The research seems to indicate that the marine algae has declined by about 40 percent since the 1950’s.
“I think that if this study holds up, it will be one of the biggest biological changes in recent times simply because of its scale,” explained Worm. “The ocean is two-thirds of the earth’s surface area, and because of the depth dimension it is probably 80 to 90 percent of the biosphere. Even the deep sea depends on phytoplankton production that rains down. On land, by contrast, there is only a very thin layer of production.”

The study focused on the phytoplankton is the first study to have looked at the changes over the past 100 years, on a global scale and using data from as far back as 1899. Some similar models have been made using the newly available data from satellites, however that data only goes back as far as 1979.

“One of the most important aspects of the new paper is that they’ve come up with the same answer but from a different approach than we saw from space,” explained Michael Behrenfeld, a marine biologist from Oregon State University. “I think that we should be concerned that this convergence of multiple approaches sees a reduction in the phytoplankton pigments as the ocean warms. If we continue to warm the climate we will probably see further reductions.”

So there you have it.. Global warming is having an adverse effect on our oceans.. I guess it’s time somebody stepped up to the plate to do something about it, however the issue has been ignored for so long, it might be very difficult to remedy the situation. Well, at least now there is solid “proof” that there is a problem, and it might finally provide the incentive needed for action to be taken.

Great star coral (Montastraea cavernosa)

Scientists and conservationists might be barking up the wrong tree when it comes to finding corals which are suited to surviving the global climate crisis. This is according to a recent research paper which was published in the journal Science.

Two researchers, Ann Budd and John Pandolf, came to this conclusion after they closely analyzed the link between evolutionary innovation and geography of the boulder star coral species complex (which is known in the scientific community as Montastrae annularis). The boulder star coral complex is a group of Caribbean reef corals.

They took a look at the shape of various growths of coral, both recent and fossil in order to see what morphology differences existed. The fossils involved dated back to over 850,000 years ago.

The results were that the quickest, and most drastic, changes to the morphology of the fossil coral growth happened at the outer edges, and the least drastic, and slowest, changes happened in the more central parts.

This seems to suggest that the edge of the coral played an integral role in evolutionary innovation, which may just be caused by cross breeding, or any other number of factors.

This is very big in terms of conservation of the coral reefs. The conventional wisdom dictates that we preserve the center of the coral, more so than focus on conserving the outer edges.

However, by focusing our efforts on the center, we may be overlooking the important sources of adaptation during climate changes.

Ann Budd, lead author of the paper, elaborates more on the subject. “…areas ranked highly for species richness, endemism and threats may not represent regions of maximum evolutionary potential.”

The conclusion of the paper is that in order to properly design marine reserves in the future we need to also take the evolutionary processes and the link between the coral and other species into account by looking at the outer edges as well.

The Red Sea

A recent study has found that Global Warming is slowing the growth of Coral in the Red Sea, and all growth could stop by the year 2070.

By utilizing CT (computed tomography) scans, some scientists over at the WHOI (Woods Hole Oceanographic Institution) have found that the greenhouse effect (which is the leading cause of global warming) is killing off one of the predominant species of coral in the Red Sea.

The summer temperatures on the sea surface remained at roughly 1.5 degrees Celsius above what’s the norm for the past ten years. The growth of the coral, Diploastrea heliopora, has seen a marked decrease of 30% and as has been quoted by scientists, “could cease growing altogether by 2070” or even sooner, as the research team quoted in the July 16th issue of the journal Science.

“The warming in the Red Sea and the resultant decline in the health of this coral is a clear regional impact of global warming,” said a WHOL postdoctoral investigator, Neal E. Cantin, who is also the co-lead researcher on the project. In the 1980s, he explained, “the average summer [water] temperatures were below 30 degrees Celsius. In 2008 they were approaching 31 degrees.”

This could spell some big trouble for the Red Sea. If the Coral is being affected in such a way, what of the other species? Could it be that the Red Sea will become another DEAD Sea in the very near future? Scientists are working round the clock on a solution for Global Warming, but it seems a solution is still years from being worked out, and in the meantime we are losing out.

Out of the estimated 5.5 gigatonnes of carbon emitted each year by human activities, about 1.8 percent are removed from the air and stored by echinoderms such as starfish, sea urchins, brittle stars and sea lilies. This makes them less important “carbon sinkers” than plankton, but the finding is still significant since no one expected them to catch such a large chunk of our wayward carbon.

The new discovery is the result of a study* led by Mario Lebrato**, PhD student at the Leibniz Institute of Marine Science. The work was done when he was at the National Oceanography Centre, Southampton (NOCS) and affiliated with the University of Southampton’s School of Ocean and Earth Science (SOES).

“I was definitely surprised by the magnitude of the values reported in this study, but [the study’s] approach seems sound, so the reported numbers are probably fairly accurate,” says palaeoceanographer Justin Ries of the University of North Carolina at Chapel Hill.

Ries also points out that these important creatures might be affected by ocean acidification.

“If the echinoderms end up being disproportionately susceptible to ocean acidification then it’s conceivable that the dissolving of echinoderm-derived sediments will be one of the earliest effects of ocean acidification on the global carbon cycle,” he explains. “In fact, maybe it already is.”
The body of an echinoderm consists of up to 80% calcium carbonate and according to the Lebrato study these hard-shelled animals collectively capture 100 billion tons of carbon each year.

“The realisation that these creatures represent such a significant part of the ocean carbon sink needs to be taken into account in computer models of the biological pump and its effect on global climate“, says Lebrato. “Our research highlights the poor understanding of large-scale carbon processes associated with calcifying animals such as echinoderms and tackles some of the uncertainties in the oceanic calcium carbonate budget. The scientific community needs to reconsider the role of benthic processes in the marine calcium carbonate cycle. This is a crucial but understudied compartment of the global marine carbon cycle, which has been of key importance throughout Earth history and it is still at present.”

The study has been published in the journal ESA Ecological Monographs.

* Mario Lebrato, Debora Iglesias-Rodriguez, Richard Feely, Dana Greeley, Daniel Jones, Nadia Suarez-Bosche, Richard Lampitt, Joan Cartes, Darryl Green, Belinda Alker (2009) Global contribution of echinoderms to the marine carbon cycle: a re-assessment of the oceanic CaCO3 budget and the benthic compartments. Ecological Monographs. doi: 10.1890/09-0553.

** mlebrato13 [at]googlemail.com

According to a new UN report, marine plants take 2 billion tonnes of carbon dioxide away from the atmosphere each year as they use the carbon dioxide for photosynthesis. Most of these plants are plankton, but planktons rarely form a permanent carbon store on the seabed. Instead, mangrove forests, salt marshes and seagrass beds are responsible for locking away well over 50 percent of all carbon that is buried in the sea – an amazing feat when you consider that these types of habitat only comprise 1 percent of the world’s seabed.

“The carbon burial capacity of marine vegetated habitats is phenomenal, 180 times greater than the average burial rate in the open ocean,” say the authors of the UN report.

Mangrove forests, salt marshes and seagrass beds are the most intense carbon sinks on our planet and they store away an estimated 1,650 million tonnes of carbon dioxide per year.

Unfortunately, these habitats are being ruined or damaged worldwide and a third of them are believed to have been lost already, although it is difficult to obtain accurate figures regarding the extent of these types of habitats worldwide. What we do know is that half of the world’s population lives within 65 miles of the ocean and that vegetated ocean near habitats are often under severe pressure.

“On current trends they may be all largely lost within a couple of decades”, said Christian Nellemann, the editor of the report.”

To help developing nations protect the remaining marine vegetated habitats the authors of the report suggest that a fund should be launched. They also wish to have a market place created where oceanic carbon sinks are traded in the same fashion as terrestrial forests.

The report, which has been named Blue Carbon, is a collaboration between the United Nations Environment Programme, the Food and Agriculture Organisation and Unesco.

Compared to the record-setting low years of 2007 and 2008, the Arctic Sea ice has made a slight recovery in 2009, according to the University of Colorado at Boulder’s National Snow and Ice Data Center. Despite this positive change, the minimum sea ice extent in 2009 was the third lowest since satellite record-keeping started in 1979.

“It’s nice to see a little recovery over the past couple of years, but there’s no reason to think that we’re headed back to conditions seen in the 1970s,” said NSIDC Director Mark Serreze, also a professor in CU-Boulder’s geography department. “We still expect to see ice-free summers sometime in the next few decades.”

The standard measurement for climate studies is the average ice extent during September. This September, the average Arctic Sea ice extent was 5.36 million square kilometres, which is 1.06 million square kilometres more than September 2007 and 690,000 square kilometres more than September 2008.

According to Mike Steele, Senior Oceanographer at the University of Washington, the decrease in ice loss is probably due to cloudy skies during late summer. Sea surface temperatures in the Arctic were higher than normal this season, but slightly lower than in 2007 and 2008 – most likely due to the presence of clouds this year. Atmospheric patterns in August and September also helped spreading the ice pack over a larger area.

Arctic sea ice follows an annual cycle of melting during the warm season and refreezing in the winter, and the extent of Arctic sea ice has always varied due to changing atmospheric conditions. During the past 30 years, there has however been a dramatic overall decline in Arctic sea ice extent.