Showing posts with label oceans. Show all posts
Showing posts with label oceans. Show all posts

Friday, December 11, 2015

Connections of Conflicts

I see a lot of the conflict that is going on in the world as a reaction to global warming, it’s effects, and people’s (probably mostly unconscious) reactions to perceived future effects. This can be seen in the reaction against population control, against environmentalism, anti-regulation in pro-gun advocacy, and with the demonization of those who are outside of one’s group. Nearly everything that the Republicans stand for is in staunch denial of Global Warming and it’s effects.

The Population Bomb was published in 1968 by Stanford University Professor Paul R. Ehrlich and his wife, Anne Ehrlich. “It warned of the mass starvation of humans in the 1970s and 1980s due to overpopulation, as well as other major societal upheavals, and advocated immediate action to limit population growth.” Birth control was not legalized for all Americans until 1972. Roe v. Wade made abortion legal in 1973. The pro-environmental idea at the time was that it would be best for parents to not have more than 2 children - as a way for people to voluntarily participate in population control. While the drastic effects of overpopulation did not happen within the time line that the Ehrlich’s laid out - the effects have been gradually developing. (Detractors use the time inaccuracies to discredit the whole thing).

Anti-abortion fanaticism may be a form of radical denial & stem from worry that society’s concern about over-population will reduce their group and therefore their security. The old idea was that there is security in numbers - more possible warriors, more power in being the majority, etc. Which is not altogether untrue. Such an argument could be reasonably made as long as there are not catastrophic Global consequences. Such an argument breaks down with the Global Warming problem - where over-population / over-consumption cannot be sustained, but will result in mass death and destruction. 

If honest, some might say, but our group needs to the be the biggest, and it’s all the others who should reduce their numbers. And they may intend to enforce that idea with a large military. They had better use drones at that rate.

One or a few small groups could get away with massive consumption. But in the past few decades, American consumption has exploded, and China, India, and many other countries with many more people and groups are trying to catch up. It is not sustainable globally - it would require many more planets and resources. Meanwhile, many corporate executives and stockholders are making fortunes off of the increased consumption of people both within the USA and around the world.

The anti-abortion POV is pushed that ‘we must have more and more babies, we must deny that having more people & more people is a problem.’ I doubt that most anti-abortion people are thinking about societal or group security consciously. But such a POV does explain, what seems inexplicable about anti-abortion arguments, which is the anti-birth control stance. If the desire was to lessen abortions, then of course, people should use more birth control. However, if the desire is actually for women (that is - women within their group) to have more children (for ‘security’, power, or whatever), then, of course, birth control as well as abortion, must be fought against. 

The anti-abortion groups are usually Christian, and generally, the sort of Christians who fight against abortion are mostly concerned about those in their group. Pro-choice advocates have said all along, that it is the people who are alive who must receive help and consideration. And weirdly, this does not concern most anti-abortion fighters. We see this in the reduced taxes on the wealthy and reduced services provided by the government for the needy. At the same time, people who are anti-abortion tend to be pro-military and advocate people in the military getting the help and consideration that liberals would want spread around to those in need. The effect of this is that the disabled and elderly poor, as well as marginalized minority groups, and even women, are left out of the security group. Those who are protected are the wealthy, healthy (men, esp.) and those in the military. 

Anti-environmentalism is similar - with the same people who are against abortion and who are pro-military - radically denying that people should care about the environment. The suggested idea is that people could only care about themselves and we could ‘never’ make the planet inhospitable to life - no matter how many toxins we add to the water, the land, & the atmosphere - and no matter how many eco-systems we wipe out. The level of animosity is bizarre which is hurled toward those who see the earth as an eco-system that life is dependent on, worthy of concern. Also the scorn and derision levied toward renewable energy makes no sense.

Silent Spring by Rachel Carson was published in 1962. “The book documented the detrimental effects on the environment—particularly on birds—of the indiscriminate use of pesticides. Carson accused the chemical industry of spreading disinformation and public officials of accepting industry claims unquestioningly.” Since then we have more detrimental effects on people and animals - more cancers and various health problems. 

The Keeling Curve graph has been illustrating the effects of increased concentration of carbon dioxide in the Earth's atmosphere since 1958. During the 70s, many people were connecting the dots that described the effects of fossil fuel use, over-population and consumption, overfishing & erasing of habitats, and pollution. National Geographic reported recently, “A study of catch data… grimly predicted that if fishing rates continue apace, all the world’s fisheries will have collapsed by the year 2048.” It was not difficult to predict that as weather events such as floods & droughts became more of a problem, as over-fishing and the erasure of habitats became more of a problem, that there would be refugees, there would be strife, there would be wars. 

By the year 2100 or even 2050, the effects of Global Warming and the resulting Climate Changes are expected to be drastic. Coastal areas are already having problems with sea level rise. Those problems are expected to get much worse as time goes on, with Southern Florida expected to be underwater before the century is over. We are seeing droughts as a problem in the farming areas of California. We have 1000 year storms and floods fairly frequently. There are often problems that are supposedly ‘worse than anticipated’. 

Many had been anticipating problems for quite awhile. Apparently much of the Carbon Dioxide was absorbed by the oceans over the years - making them more acidic. This will be a great problem for coral and shellfish. It was predicted long age that  the haves will want to hold on to their privileges, the have-nots will try to stay alive. It was be a mess. It will be like musical chairs - where chairs are being thrown out by the thousands, and people will fight over getting one before the bell rings. The wealthy hope that by buying many extra chairs, they will be safe.

Society has been anticipating problems - consciously by some, unconsciously by others. The more conscious ones live ‘Off the Grid’, and practice organic gardening, and encourage native habitats and healthy eco-systems whenever possible. Many (but not enough) live simply - avoiding over-consumption of meat, of mass-produced things, and fuel - even travel. Liberals have been trying to encourage mass transit, and renewable energy, which is sorely lacking in the USA.

The unconscious Republicans and large corporate interests have worked on getting people to be fearful, buy guns, buy Hummers, get pit bulls, think militia-like - and deny that there are any problems with American capitalism and mindless consumption. They also rail against regulations, against birth control & abortion, against environmentalists, and they say Global Warming is a hoax and the International Scientific community is lying. 

It takes regulations to reduce all the problems that need reducing to maintain a healthy planet - whether it’s overfishing, over-polluting, habitat erosion, and the use of fossil fuels. We have too much antibiotics in our meat and our milk. We have poisons in our make-up and in pet food that goes unregulated. The way it is now, you have to be fairly well off to afford food that is safe and not toxic. Without regulations - some groups take so much that habitats are destroyed, animals become extinct, land is worthless for farming and pollution makes (healthy) fishing impossible. Without regulations, some pollute more than the planet can tolerate.

Consumption could also be regulated - so that some don’t monopolize the resources and contribute more than their share to the problems. Here in the USA, most people, and esp. the wealthy, consume much more than necessary. Where once civilization and production grew and grew and grew - it needs to stop growing. Even if corporations can find and dig up the resources, we need to find peaceful ways to shrink, and to do with less. 

We are using so much money, and resources on the Military - emitting massive amounts of fossil fuels, that it is obscene. A strong military becomes all the more necessary by those who want their country to have more than their share of fossil fuels, or metals, & whatever resources they desire - to maintain their lifestyle. The bloated military, USA, makes global warming worse and it makes strife around the world worse. 

One of the things we are seeing in the USA are Republicans who encourage people to be anti-community - if that community includes people ‘who are not like them’. They want to draw a circle around their group as ‘Christians’ and leave everyone else out. The argument is that if someone needs help, they should join a church (and follow the ‘rules’ - not be gay, for women to be submissive). 

Conservatives and some Libertarians have made people who sell hate and divisiveness, such as Rush Limbaugh and Ann Coulter, rich. The latest is that Donald Trump, hate-monger in chief, is the front runner for the Republican primary elections. The hate and derision that is expressed already make violence more likely toward those the that Republicans see as ‘outsiders’ more likely. That includes violence against the LGBTQ community, as well as Muslims, and even women.

In my opinion, it is the creative, liberal people, who have, for the most part, been working on solutions. It has been the Republicans and conservatives who have been blocking, or trying to block) those solutions (though some have gotten through). We need to be more creative. We need to be more inclusive. We all need to live more simply.



Sunday, February 22, 2015

Sea Lions pups have also been dying off of the California Coast

From the Santa Cruz Sentinel:

Sea lions desperate for nourishment dying off in alarming numbers on California coast

Each day, dog crates with sick sea lions arrive here and at four other locations from San Luis Obispo to Fort Bragg in what’s alarmingly become a third year of massive sea lion pup dieoffs. And if the trend continues, marine biologists warn, it could deplete an entire generation of California sea lions. One desperate and hungry pup was found Wednesday beside busy Skyline Boulevard in San Francisco, more than 1,000 feet from the ocean.
Scientists say changes in the coastal California Current have pushed fish populations further from the sea lion rookeries in the Channel Islands, where the pups are born around June. And the diminishing number of sardines and anchovies have forced nursing mothers to switch to rockfish and squid. These changes are believed to have contributed to a lower quality of milk and higher number of malnourished pups.
“These pups should still be nursing. They don’t have the skills to catch food on their own,” said Shawn Johnson, director of the center’s veterinary science department....

"Mass Death of Seabirds in Western U.S. Is 'Unprecedented'"

Picture of a group of dead Cassin's aukletsFrom National Geographic:
By Craig Welch
PUBLISHED JANUARY 23, 2015
In the storm debris littering a Washington State shoreline, Bonnie Wood saw something grisly: the mangled bodies of dozens of scraggly young seabirds.


Walking half a mile along the beach at Twin Harbors State Park on Wednesday, Wood spotted more than 130 carcasses of juvenile Cassin's auklets—the blue-footed, palm-size victims of what is becoming one of the largest mass die-offs of seabirds ever recorded.

"It was so distressing," recalled Wood, a volunteer who patrols Pacific Northwest beaches looking for dead or stranded birds. "They were just everywhere. Every ten yards we'd find another ten bodies of these sweet little things."

Cassin's auklets are tiny diving seabirds that look like puffballs. They feed on animal plankton and build their nests by burrowing in the dirt on offshore islands. Their total population, from the Baja Peninsula to Alaska's Aleutian Islands, is estimated at somewhere between 1 million and 3.5 million.

Last year, beginning about Halloween, thousands of juvenile auklets started washing ashore dead from California's Farallon Islands to Haida Gwaii (also known as the Queen Charlotte Islands) off central British Columbia. Since then the deaths haven't stopped. Researchers are wondering if the die-off might spread to other birds or even fish.

"This is just massive, massive, unprecedented," said Julia Parrish, a University of Washington seabird ecologist who oversees the Coastal Observation and Seabird Survey Team (COASST), a program that has tracked West Coast seabird deaths for almost 20 years. "We may be talking about 50,000 to 100,000 deaths. So far."

....On some beaches the Cassin's auklet death toll was a hundred times greater than any bird die-off ever tallied there....

Bill Sydeman, a senior scientist at California's Farallon Institute, said he believes the most likely scenario is that the deaths are related to a massive blob of warm water that heated the North Pacific last year and contributed to California's drought and to 2014 being the hottest year on record.

That water was hotter and stayed warm longer than at any time since record-keeping began. It stretched across the Gulf of Alaska, where a high-pressure system blocked storms, preventing the water from churning to the surface and mixing with air. More warm water eventually moved inward along the coast as far south as California, altering how favorable the environment was for the zooplankton that many fish and birds, including Cassin's auklets, feed on.

That all happened in late summer—about the same time the young auklets began to fledge.

Saturday, January 18, 2014

The State of the Oceans

I figured I would Google "The State of the Oceans" to see what came up. What I got was links to a newish website, http://www.stateoftheocean.org/ that outlines many of the problems along with suggested solutions.


Professor Rogers: "Human impacts on the oceans are damaging vital food resources and functions that feedback to climate change and move us further towards unpredictable and potentially catastrophic changes to the environment, biodiversity and human society. This is of deep concern to me and the majority of scientists who study the ocean and should be treated as a global emergency of utmost urgency".


Big Threats: 
Climate Change, Over-fishing, Habitat Destruction, (Oil, etc.) Extraction, Pollution & Alien Species Introduction.


"In Brief: Most, if not all, of the five global mass extinctions in Earth's history carry the fingerprints of the main symptoms of global carbon perturbations (global warming, ocean acidification and anoxia or lack of oxygen; e.g. Veron, 2008).
It is these three factors — the 'deadly trio' — which are present in the ocean today. In fact, the current carbon perturbation is unprecedented in the Earth's history because of the high rate and speed of change. Acidification is occurring faster than in the past 55 million years, and with the added man-made stressors of overfishing and pollution, undermining ocean resilience.

.... Continued releases and slow breakdown rates mean that legacy chemical pollution ( such as from DDT) remains a major concern. However, concerns have been raised recently over a wide range of novel chemicals now being found in marine ecosystems or suspected to be harmful to marine life. High-profile examples include brominated flame retardants, fluorinated compounds, pharmaceuticals and synthetic musks used in detergents and personal care products.
Some of these chemicals have been located recently in the Canadian Arctic seas, and some are known to be endocrine disrupters or can damage immune systems. Marine litter and plastics are also of major concern, and there is evidence that certain plastics can transport other harmful chemicals in the marine environment.

…..Scientists at the IPSO meeting agreed that overfishing is exerting an intolerable pressure on ecosystems already under attack by the effects of acidification and warming, and other largely man-made ocean problems. A recent study showed that 63% of the assessed fish stocks worldwide are over-exploited or depleted and over half of them require further reduction of fishing, in order to recover.
The near extinction of a fish called Chinese bahaba (Bahaba taipingensis) is one of the many examples that highlight how overfishing threatens marine biodiversity. It has taken less than seventy years for this giant fish to become critically endangered after it was first described by scientists in the 1930s."

Thursday, May 16, 2013

Fish fleeing warmed waters


More consequences - study:

May 16 News: Fish Are Fleeing Climate-Warmed Waters And Heading For The Earth’s Poles


(Credit: TANAKA Juuyoh/Flickr)
For more than 30 years, ocean fish and mammals have migrated away from warming equatorial waters and toward the poles, providing more evidence climate change has already had broad global consequences. [Washington Post]
Fish and other sea life have been heading toward the Earth’s poles for more than three decades, a mass migration to cooler waters that provides more evidence of a rapidly warming planet and has repercussions for fish harvests around the globe, according to a first-of-its-kind study released Wednesday.
The study, in the journal Nature, found that significant numbers of 968 species of fish and invertebrates examined by University of British Columbia researchers moved to escape the warming waters of their original habitats. Previous studies had demonstrated the same phenomenon for specific places in the world’s oceans. The authors said their research is the first to assess the migration worldwide and to look back as far as 1970.
The research is more confirmation that “global change is real and has been real for a long time. It’s not something in the distant future. It is well underway,”said Boris Worm, a professor of marine biology at Dalhousie University in Halifax, Nova Scotia, who was not part of the study.

Friday, November 30, 2012

Red algae closes beaches in Sydney

Dinoflagellates in at Clovelly beach in Sydney Australia

From the Herald Sun:

Red tide of algae strikes 10 more Sydney beaches


The Metropolitan Sydney, South Coast and Hunter Regional Algal Co-ordinating Committees yesterday said they had warned "communities along coastal beaches between Sydney and the Central Coast about algal blooms.
"This bloom has likely occurred as a result of the upwelling of nutrient-rich deep ocean water on to the continental shelf," they said.
"Testing of samples taken from Bondi beach have been identified as noctiluca scintillans, which appears as a pinkish to reddish discolouration in water."
"Upwellings create food sources for the predatory noctiluca scintillans - there's more bacteria and phytoplankton for them to eat," Dr Murray said.
...
"They live on the surface off the coast and are very buoyant, so they are at the mercy of wind and ocean currents. If you have the right mix they can be concentrated in dense groups and pushed on to the beaches.
"These two algal concentrations - on the northern and eastern beaches - would have come from the same offshore source.
"They aren't toxic but accumulate ammonia because of what they eat, which can be irritating to some people."

"Study Gives New Benchmark for How Much Ice is Melting"



From Climate Central by Michael Lemonick


The vast ice sheets that cover Greenland and Antarctica have begun melting and sliding into the ocean as heat-trapping greenhouse gases continue to build in the atmosphere. How much and how fast the ice is disappearing, however, has been poorly understood, because the satellites that measure it haven’t always agreed. But a report published Thursday in Science has cleared up much of the uncertainty.
A team of no fewer than 47 scientists from 36 laboratories, looking at data from 10 different satellites, has come up with numbers everyone is on board with: between 1992 and 2011, Greenland has lost 152 billion metric tons of ice, while Antarctica has shed 71 billion, contributing 11 millimeters to the rise in sea level over that period — about a fifth of the total (the rest has come from seawater expanding as it warms).

“The new estimates,” lead author Andrew Shepherd, of the University of Leeds, said in a press conference, “are the most reliable to date. They end 20 years of uncertainty.”

The estimates don't change projections about what’s likely to happen for the rest of this century. Scientists’ best estimate is that that the ocean, which has risen an average of 8 inches since 1900, should rise another 3 feet or so by 2100. But without a truly accurate record of how much melting has already occurred, it’s hard to know how good that projection is. It will also be hard to be certain if the melting starts to speed, or slow.
“This [study] provides a nice baseline. It’s really the start of the reliable record,” said co-author Ben Smith, of the University of Washington, at the press conference...
Scientists working on data from all 10 came together, and compared results from exactly the same time periods for exactly the same regions within Antarctica and Greenland. It was somewhat analogous to photographing a scene not with a single camera, but with 10 different cameras looking from 10 different perspectives: you get a much richer picture of what’s going on. 
In particular, Shepherd said, scientists can now start to pinpoint changes in ice region by region, and figure out what’s happening in each place.
For example, the ice sheet in East Antarctica, which holds by far the most ice, is actually growing slightly, because of an increase in snowfall. “That’s consistent with climate warming because you expect more evaporation and therefore more rain and snow,” Shepherd said.
By contrast, the smaller ice sheets in West Antarctic and the Antarctic Peninsula are losing ice more quickly. “In general,” said co-author Ian Joughin of the University of Washington in an interview, “this is due to heat from the ocean. We’re doing lots of work trying to understand the melting going on beneath ice shelves.”

Tuesday, April 17, 2012

Jellyfish blooms creating oceans of slime


We here at Universal Jellyfish have been on top of this for awhile. If people decide to get serious about eating them - that would probably take care of it.





Here is a BBC article with updates:


In the last decade enormous plagues of jellyfish have been taking over the seas. And it is our fault. 
As I rose to a couple of metres below the surface, I saw the problem too late: the shallow water was carpeted with mauve stinger jellyfish (Pelagia noctiluca). There was no avoiding it, reaching the surface meant I had to swim through the flames of stingers....
Locals told me the carpet of jellyfish, known as a bloom, was not an isolated case. My dive instructor said he had seen massive blooms off the coast of Gozo every year since 2000. But never before then.
In fact, huge annual jellyfish blooms have been cropping up not just across the Mediterranean, but also the Black Sea, the Gulf of Mexico, and the Yellow and Japan Seas.  Is this a bizarre blip in the continually changing balance of oceanic life, or the beginnings of a new state change in marine diversity?Or in other words: in the Anthropocene, will the seas be filled with slime?If they are, we face some serious problems.
Last year alone, nuclear power plants in Scotland, Japan, Israel and Florida, and also a desalination plant in Israel, were forced to shutdown because jellyfish were clogging the water inlets. The entire Irish salmon industry was wiped out in 2007 after a plague of billions of mauve stingers – covering an area of 10 sq miles (26 sq km) and 35ft (11m) deep – attacked the fish cages. Two years later, a fish farm in Tunisia lost a year's production of sea bream and sea bass after jellyfish invasions. 
Perhaps the most extraordinary blooms have been those occurring in waters off Japan. There, refrigerator-sized gelatinous monsters called Nomuras, weighing 485lb (220 kg) and measuring 6.5ft (2m) in diameter, have swarmed the Japan Sea annually since 2002, clogging fishing nets, overturning trawlers and devastating coastal livelihoods. These assaults have cost the Japanese fisheries industry billions of yen in losses. 

Marine ecologists are warning of worse to come, and pointing the tentacle of blame at us. Some researchers fear that human changes to the marine environment may be leading to a tipping point in which jellyfish will rule the oceans, much as they did hundreds of millions of years ago in pre-Cambrian times. In 2009, Australian marine scientist Anthony Richardson and his colleagues published a research paper entitled The jellyfish joyride, in which they warn that if we do not act to curb current blooms, we will experience runaway populations that will cause open oceanic ecosystems to flip from ones dominated by fish biodiversity to ones dominated by jellyfish.
 
The problem is that no one really knows what causes the blooms. Some believe that population explosions result from overfishing of their dining competitors and predators, which include more than 100 species of fish, and animals such as turtles. However, other researchers point out that overfishing also hits jellyfish by reducing their food availability.Either way, what is clear is that jellyfish are simply better prepared than other marine life for many of the ways humans are changing the ocean environment, such as warmer temperatures, salinity changes, ocean acidification and pollution. In this sense, humans might be jellyfishes’ best friend. 
For instance, pollution can cause algal blooms that reduce the water's oxygen content. This hits muscular swimmers like fish hard, but jellyfish can cope far better with these conditions. 

Warmer water encourages jellyfish reproduction, and they can also better tolerate population crashes because their reproductive strategies are complex and adaptable. Some species of jelly can clone themselves, whereas others reproduce sexually but also have a polyp stage – like corals, with which they are related – that allows large populations of immature individuals to multiply while waiting for the right conditions to mature into adulthood. In these ways, they can withstand impacts that devastate other marine species.
 
Even the coastal infrastructure we build seems to be working to their advantage. Rob Condon, a marine scientist at Dauphin Island Sea Lab in Alabama, says that the pontoons, piers and even drilling platforms help provide anchors for jellyfish polyps, encouraging local population explosions.... 
Gathering data on jellyfish, though, is notoriously difficult. Although 70% of the planet is covered by ocean, we really only have a hazy idea about most of the life outside of coastal or estuarine zones. Jellyfish, which inhabit open oceans and deep waters, are still an enigma in many ways. Monitoring individuals and blooms cannot be done by satellite because they are so transparent, have very low biomass, and often occupy waters below the optical depth for satellite penetration. Even finding polyps and larvae in sea grass is tricky. So, despite JEDI's efforts, no one can say for sure whether blooms are increasing or not.... 

Perhaps one solution is to sustainably exploit their abundance. Jellyfish do have their uses: in collagen preparations (to treat rheumatoid arthritis, for example), they are popular attractions in aquaria, and their fluorescent proteins have been instrumental in biomedical discoveries.
 
And, of course, they are a source of food. In Japan and other parts of Asia, jellyfish are dried and chopped into noodle-like strips to be added to soups, for example. Some entrepreneurial Japanese are even making vanilla-and-jellyfish ice cream. Jellyfish are 80% protein and very low in fat, although the high sodium content probably outweighs their health benefits.

Friday, July 01, 2011

“Jellyfish” Ensemble"



Alexander McQueen (British, 1969–2010)
“Jellyfish” Ensemble
Plato’s Atlantis, spring/summer 2010
Dress, leggings, and “Armadillo” boots embroidered with iridescent enamel paillettes
In McQueen’s Words:
“[This collection predicted a future in which] the ice cap would melt . . . the waters would rise and . . . life on earth would have to evolve in order to live beneath the sea once more or perish. Humanity [would] go back to the place from whence it came.”

From the Metropolitan Museum of Art Blog

Sunday, June 26, 2011

"Species Migrate Across Newly Ice-free Northwest Passage"

From the Washington Post:

AMSTERDAM — (AP) When a 43-foot (13-meter) gray whale was spotted off the Israeli town of Herzliya last year, scientists came to a startling conclusion: it must have wandered across the normally icebound route above Canada, where warm weather had briefly opened a clear channel three years earlier.

On a microscopic level, scientists also have found plankton in the North Atlantic where it had not existed for at least 800,000 years.

The whale’s odyssey and the surprising appearance of the plankton indicates a migration of species through the Northwest Passage, a worrying sign of how global warming is affecting animals and plants in the oceans as well as on land.

“The implications are enormous. It’s a threshold that has been crossed,” said Philip C. Reid, of the Alister Hardy Foundation for Ocean Science in Plymouth, England.

“It’s an indication of the speed of change that is taking place in our world in the present day because of climate change,” he said in a telephone interview Friday.

Reid said the last time the world witnessed such a major incursion from the Pacific was 2 million years ago, which had “a huge impact on the North Atlantic,” driving some species to extinction as the newcomers dominated the competition for food.

Reid’s study of plankton and the research on the whale, co-authored by Aviad Scheinin of the Israel Marine Mammal Research and Assistance Center, are among nearly 300 scientific papers written over the last 13 years that are being synthesized and published this year by Project Clamer, a collaboration of 17 institutes on climate change and the oceans.

Changes in the oceans’ chemistry and temperature could have implications for fisheries, as species migrate northward to cooler waters, said Katja Philippart, of the Royal Netherlands Institute of Sea Research who is coordinating the project funded by the European Union.

“We try to put the information on the table for people who have to make decisions. We don’t say whether it’s bad or good. We say there is a high potential for change,” she said.

The Northwest Passage, the route through the frigid archipelago from Alaska across northern Canada, has been ice-free from one end to the other only twice in recorded history, in 1998 and 2007. But the ice pack is retreating farther and more frequently during the summers.

Plankton that had previously been found only in Atlantic sea bed cores from 800,000 years ago appeared in the Labrador Sea in 1999 — and then in massive numbers in the Gulf of St. Lawrence two years later. Now it has established itself as far south as the New York coast, Reid said.

The highly endangered gray whale sighted off the Israeli coast in May 2010 belonged to a species that was hunted to extinction in the Atlantic by the mid-1700s. The same animal — identified by unique markings on its fluke, or tail fin — appeared off the Spanish coast 22 days later, and has not been reported seen since.

Though it was difficult to draw conclusions from one whale, the researchers said its presence in the Mediterranean “coincides with a shrinking of Arctic Sea ice due to climate change and suggests that climate change may allow gray whales to re-colonize the North Atlantic.”

That may be good for the whales, but other aspects of the ice melt could be harmful to the oceans’ biosystems, the scientists warn...

Wednesday, June 22, 2011

"Oceans on brink of catastrophe"

From www.independent.co.uk/
"State of seas 'much worse than we thought', says global panel of scientists"

The world's oceans are faced with an unprecedented loss of species comparable to the great mass extinctions of prehistory, a major report suggests today. The seas are degenerating far faster than anyone has predicted, the report says, because of the cumulative impact of a number of severe individual stresses, ranging from climate warming and sea-water acidification, to widespread chemical pollution and gross overfishing.

The coming together of these factors is now threatening the marine environment with a catastrophe "unprecedented in human history", according to the report, from a panel of leading marine scientists brought together in Oxford earlier this year by the International Programme on the State of the Ocean (IPSO) and the International Union for the Conservation of Nature (IUCN).

The stark suggestion made by the panel is that the potential extinction of species, from large fish at one end of the scale to tiny corals at the other, is directly comparable to the five great mass extinctions in the geological record, during each of which much of the world's life died out. They range from the Ordovician-Silurian "event" of 450 million years ago, to the Cretaceous-Tertiary extinction of 65 million years ago, which is believed to have wiped out the dinosaurs. The worst of them, the event at the end of the Permian period, 251 million years ago, is thought to have eliminated 70 per cent of species on land and 96 per cent of all species in the sea.

The panel of 27 scientists, who considered the latest research from all areas of marine science, concluded that a "combination of stressors is creating the conditions associated with every previous major extinction of species in Earth's history". They also concluded:

* The speed and rate of degeneration of the oceans is far faster than anyone has predicted;

* Many of the negative impacts identified are greater than the worst predictions;

* The first steps to globally significant extinction may have already begun.

"The findings are shocking," said Dr Alex Rogers, professor of conservation biology at Oxford University and IPSO's scientific director. "As we considered the cumulative effect of what humankind does to the oceans, the implications became far worse than we had individually realised.

"This is a very serious situation demanding unequivocal action at every level. We are looking at consequences for humankind that will impact in our lifetime, and worse, in the lifetime of our children and generations beyond that." Reviewing recent research, the panel of experts "found firm evidence" that the effects of climate change, coupled with other human-induced impacts such as overfishing and nutrient run-off from farming, have already caused a dramatic decline in ocean health.

Not only are there severe declines in many fish species, to the point of commercial extinction in some cases, and an "unparalleled" rate of regional extinction of some habitat types, such as mangrove and seagrass meadows, but some whole marine ecosystems, such as coral reefs, may be gone within a generation.

The report says: "Increasing hypoxia [low oxygen levels] and anoxia [absence of oxygen, known as ocean dead zones], combined with warming of the ocean and acidification, are the three factors which have been present in every mass extinction event in Earth's history.

"There is strong scientific evidence that these three factors are combining in the ocean again, exacerbated by multiple severe stressors. The scientific panel concluded that a new extinction event was inevitable if the current trajectory of damage continues."

The panel pointed to a number of indicators showing how serious the situation is. It said, for example, that a single mass coral bleaching event in 1998 killed 16 per cent of all the world's coral reefs, and pointed out that overfishing has reduced some commercial fish stocks and populations of "bycatch" (unintentionally caught) species by more than 90 per cent.

It disclosed that new scientific research suggests that pollutants, including flame-retardant chemicals and synthetic musks found in detergents, are being traced in the polar seas, and that these chemicals can be absorbed by tiny plastic particles in the ocean which are in turn ingested by marine creatures such as bottom-feeding fish.

Plastic particles also assist the transport of algae from place to place, increasing the occurrence of toxic algal blooms – which are also caused by the influx of nutrient-rich pollution from agricultural land.

The experts agreed that when these and other threats are added together, the ocean and the ecosystems within it are unable to recover, being constantly bombarded with multiple attacks....


The report's conclusions will be presented at the UN in New York this week, when delegates begin discussions on reforming governance of the oceans.

The five great extinctions

The Cretaceous–Tertiary extinction (the End Cretaceous or K-T extinction) 65.5 Mya (million years ago)

Plankton, which lies at the bottom of the ocean food chain took a hard hit in an event that also saw the demise of the last of the non-avian dinosaurs. The giant mosasaurs and plesiosaurs also vacated the seas. An asteroid or volcano eruptions are thought to be to blame.

The Triassic–Jurassic extinction (End Triassic) – 205 Mya

Having a profound affect on sea and land, this period saw 20 per cent of all marine families disappear. In total, half the species known to be living on Earth at that time went extinct. Gradual climate change, fluctuating sea-levels and volcanic eruptions are among the reasons cited for the disappearing species.

The Permian–Triassic extinction (End Permian) 251 Mya

A period known as the "great dying" was the most severe of the earth's extinction events, when 96 per cent of marine species were lost, as well as almost three-quarters of terrestrial species. The planet took a long time to recover from what has also been called "the mother of all mass extinctions".

The late Devonian extinction 360–375 Mya

Three-quarters of all species on Earth died out in a period that may have spanned several million years. The shallow seas were the worst affected and reefs would not recover for another 100 million years. Changes in sea level and climate change were among the suspected causes.

The Ordovician–Silurian extinction (End Ordovician or O-S) – 440–450 Mya

The third largest extinction in Earth's history had two peak dying times. During the Ordovician, most life was in the sea, so it was sea creatures such as trilobites, brachiopods and graptolites that were drastically reduced. In all, some 85 per cent of sea species were wiped out.

Waves of destruction

Case Study One in the panel's report assesses the "deadly trio" of factors – global warming, ocean acidification and anoxia (absence of oxygen). Most if not all of the five global mass extinctions in prehistory carry the fingerprints of these "carbon perturbations", the report says, and the "deadly trio" are present in the ocean today.

Case Study Two looks at coral reefs, and the fact that these "rainforests of the sea" (so-called for their species richness) are now facing multiple threats. The panel concluded that these threats acting together (pollution, acidification, warming, overfishing) will have a greater impact than if they were occurring on their own, and so estimates of how coral reefs will respond to global warming will have to be revised.

Case Study Three examines pollution, which is an old problem, but may be presenting new threats, as a wide range of novel chemicals is now being found in marine ecosystems, from pharmaceuticals to flame retardants, and some are known to be endocrine disrupters or can damage immune systems. Marine litter, especially, plastics, is a huge concern.

Case Study Four looks at over-fishing: it focuses on the Chinese bahaba, a giant fish which was first described by scientists only in the 1930s, but is now critically endangered: it has gone from discovery to near-disappearance in less than 70 years. A recent study showed that 63 per cent of the assessed fish stocks worldwide are over-exploited or depleted.

Tuesday, February 22, 2011

SPIKE IN # OF STILLBORN DOLPHINS ON COAST

From Sunherald.com:

GULFPORT -- Baby dolphins, some barely three feet in length, are washing up along the Mississippi and Alabama shorelines at about 10 times the normal number for the first two months of the year, researchers are finding.

Seventeen young dolphins, either aborted before they reached maturity or dead soon after birth, have been collected on the coasts of the states in the past two weeks, both on the barrier islands and mainland beaches.

This is the first birthing season for dolphins since the BP oil spill in the Gulf of Mexico; however, Moby Solangi, director of the Institute for Marine Mammal Studies in Gulfport, said it’s too early to tell why they died.

“For some reason, they’ve started aborting or they were dead before they were born,” Solangi said. “The average is one or two a month. This year we have 17 and February isn’t even over yet.”

It’s the most that Solangi has seen in the two states and he’s been watching the Gulf for 30 years, recording dolphin data in Mississippi for 20. The institute has collected 13 infant dolphins in the last two weeks and three more on Monday along the Gulfport and Horn Island beaches.

Bill Walker, head of the Mississippi Department of Marine Resources said his teams will work with the institute to collect the bodies of infant dolphins on Horn Island.

“Something is amiss,” Walker said Monday. “It could be oil-related. Who knows? Some of these mothers were probably exposed to oil. Whether it rendered them unable to carry their calves, we just don’t know.”

Early in the season
When a dolphin is born, its mother has the job of making sure it gets to the surface for its first breath of air.

If the baby is dead, the mother still tries. Over and over, sometimes for hours. She stays with the baby, not realizing fully that it is dead. She will hit it with her tail, grasp it, pull it and nudge it gently, hoping to get it to breathe.

“The more desperate the animal gets when the calf is not breathing, the more intense her behavior becomes,” Solangi said. “I’ve watched it.”

She goes into a frenzy trying to get the baby to respond and then stays with her dead infant, sometimes for hours before she lets it go.

That’s why some of the dead dolphin infants identified in the last two weeks have trauma to their bodies, he said.
“They didn’t die by being hit,” Solangi said.

The institute performed necropsies, animal autopsies, on two of them Monday and have data collected from the other bodies in the past two weeks.

Friday, January 07, 2011

Global Warming & Changes to Oceanic Currents

From Eawag: Swiss Federal Institute of Aquatic Science and Technology:

Corals provide evidence of changes to oceanic currents through Global Warming

Examination of deep sea corals reveals that there have been drastic changes to oceanic currents in the western North Atlantic since the 1970s. The influence of the cold water Labrador Current, which is in periodic interchange with the warm Gulf Stream, has been decreasing continually since the 1970s. Occurring at the same time as Global Warming this phenomenon is unique in the past 2000 years. These results are reported by researchers from the University of Basel and Eawag in the current edition of the scientific journal «PNAS».

One of the oldest known weather systems in the world is the North Atlantic Oscillation (NAO), the periodic variation of atmospheric pressure difference between the Azores and Iceland. It dictates not only whether the winters in Europe will be cold and dry or wet and warm, but also influences the oceanic currents in the North Atlantic. On the continental shelf off Nova Scotia, the NAO seems to control the interaction between different water masses. During positive phases, the oceanography of the north-west American continental shelf is dictated by a relatively warm water mass at 10 degrees Celsius which is salty and nutrient-rich, originating from the Gulf Stream. If the NAO is in a negative phase, the Labrador Current is dominant, a relatively cold water mass at 6 degrees Celsius, which is relatively nutrient-poor scarce and originates from sub-polar regions.

Using new geochemical methods, an international team of researchers including the biogeochemists Prof. Moritz Lehmann (University of Basel) and Dr. Carsten Schubert (Eawag – Swiss Federal Institute of Aquatic Science and Technology) were able to prove that a drastic change to a «warm water mode» occurred in the western North Atlantic in the early 1970s. This change, the timing of which coincides with and may be directly related to Global Warming, is unique in the last 2000 years.

Corals record climate data

The researchers made use of the fact that water masses carry different nitrogen isotopic signatures (different ratios of the stable nitrogen isotopes 15N und 14N) depending on their origins. These signals are then recorded in the biomass of deep sea corals hundreds of metres below the surface that feed on sinking organic particles from above. The deep sea corals thus allow a reconstruction of the oceanic current ratios over the last few decades. An exact dating of the individual samples is possible due to the corals’ production of easily identifiable annual growth rings. The researchers were able to show a clear reduction in the 15N/14N ratio since 1970 which indicates that the role of the cold Labrador Current, with a higher 15N/14N ratio is becoming less important.

Possible alternative bio-ecological or geochemical causes for such a change in the stable isotope ratio were able to be excluded by the researchers using component-specific nitrogen analyses of the corals. Depending on the food chain structure, changes occur in the 15N/14N ratio of specific amino acids in the corals’ individual annual growth rings. The nitrogen isotope signatures of the amino acids show that the food chain effect did not play a significant role at least since the 1970s.

Global Warming with consequences

Isotopic analysis of fossil deep sea corals from the same region confirms that the nitrogen isotope ratios and thus the oceanic current situation have remained practically unchanged over the past 2000 years. This indicates that the oceanographic change in oceanic currents of this scale, which has been occurring since the 1970s, is a unique occurrence within the past 2000 years.

The researchers suspect there is a direct connection between the changes in the oceanic currents in the North Atlantic and Global Warming primarily caused by human activities.

Sunday, November 21, 2010

New Study- 200 Years of Fish Population Data

From Wired:


By digging up and poring over old books and records of Mediterranean marine life, scientists have filled a 200-year gap in fish population data.

The data, generated from from naturalists’ accounts and fish-market records published between 1818 and 2000, shows the clear decline of fishes in the Adriatic Sea (east of Italy) and provides a crucial baseline comparison for the ongoing collapse of today’s fisheries.

“The understanding of fish communities’ changes over the past centuries has important implications for conservation policy and marine resource management,” the authors wrote in a study published Nov. 17 in the journal PLoS ONE. Ignoring old records, they added, has led to a “historical myopia” in fishery science that underestimates the loss of natural resources.

It’s no puzzle why. Prior to the mid-20th century, large-scale surveys of marine life didn’t happen and, for that matter, there wasn’t the modern-day level of concern about natural resources or the impetus to conserve them. Back then, there were only fish-catch records and naturalists’ qualitative descriptions of life beneath the waves.


To gather the information, an Italian team of ecologists and marine scientists scoured the libraries, museums and archives of six European cities. In total, the search turned up 36 books by naturalists and dozens of detailed catch records from fish markets spanning almost two centuries.

Using statistical methods to combine and integrate the descriptive naturalist records with fish-catch tallies, the scientists partially reconstructed the rise and fall of 255 fish species in the region.

Sharks in the Adriatic Sea made up about 17 percent of the total fish population in 1800, while bottom-dwellers (such as hake, flounder and anglers) made up 27 percent of all fish. By 1950, the populations had dipped to 11 percent and 20 percent, respectively. Meanwhile, the proportion of smaller and faster-breeding fish rose from about 12 percent of the population to more than 28 percent.

“Chondrichthyes are highly vulnerable to [human] disturbances, and especially to fishery,” the authors wrote, thanks to their large size, slow growth and breeding behavior. As fishermen nabbed such large fish, the smaller and more-nimble species thrived because they weren’t being eaten as readily (by sharks or humans).

Fish population declines due to human activity since the mid-20th century are established and substantial, with encroachment by non-native fish species, habitat alteration and pollution all contributing to shrinking and more-fragile populations of fish. While it’s not entirely clear how large a role fishing pressure played prior to 1950, the authors say their “results indicate that pre-industrial fisheries had already had significant impacts” on fish populations in the Adriatic.

The study can’t offer a worldwide assessment of fishery health in the past. But turning old records of marine life into useful datasets may prove promising for assessing past fish populations in other regions.

“Naturalists’ eyewitness accounts of fish species, which have long been disregarded by fishery biologists as being ‘anecdotal’ and not ‘science,’ proved to be a useful tool for extending the analysis into the past, well before the onset of field-based monitoring programs,” the authors wrote.