Coral Reefs do not recover from warming induced bleaching

Byoliveridley

BBC NEWS | Science/Nature | Warming set to ‘devastate’ coral

Bleaching in 1998 occurred in all reef regions of the world; 16% of the world’s reefs were lost in that one year, alone. But the western Indian Ocean suffered most because of an interaction between El Nino and another periodic climate phenomenon called the Indian Ocean dipole.

In the seven years since, the damaged reefs have been largely unable to reseed. Many simply collapsed into rubble and became covered in algae.

This collapse removed food and shelter from predators for a large and diverse amount of marine life. The survey showed four fish species could already be locally extinct, and six species are at critically low levels.

The survey also revealed that the diversity of fish species in the heavily impacted sites had plummeted by about 50%.

Well, this is bad news, there has been earlier indication that coral reefs were not necessarily doomed by higher ocean temperatures because this would just cause a shift in the coral species to varieties thriving at higher temperatures/exhibiting adaptive behaviors. Obviously, this did not happen fast enough to regenerate the reef.

Similar Posts

  • Today is World Water Day

    Byoliveridley

    World Water Day – World Water Day

    As opposed to every other day when water’s not all that important! But seriously, the site is a good compendium of resources. This year’s theme is coping with scarcity. I remember when Madras had severe water shortages in the late ’80s until a couple of years back. You had to be either very lucky to live in the right neighborhood/rich enough to buy water from private tankers to fill up your water tank. Running water was off and on, we had giant buckets of stored water, it was quite an adventure for me (and a great deal of stress for my parents, of course). Those days still leave a big impression on me. Everytime I leave the tap running for more than 30 seconds, or stand in the shower for longer than necessary, I can hear my mom yelling!

  • Recycling better than landfilling even to China

    Byoliveridley

    Sending old newspapers and plastic bottles 10,000 miles for recycling in China produces more carbon savings than landfilling it in Britain and making new goods, reveals a study from the government body charged with reducing UK waste.In the last 10 years annual exports of paper, mainly to India, China and Indonesia, have risen from 470,000 tonnes to 4.7m tonnes, while exports of old plastic bottles have gone from under 40,000 tonnes to half a million tonnes.Now the counterintuitive conclusions of the report from the Waste Resources Action Programme (Wrap) suggest that the advantage of recycling over landfilling is so great that it makes environmental sense to ship waste right round the world if it can be used again.

    Waste Resources Action Programme reveals recycling in China saves carbon emissions | Environment | guardian.co.uk

    One of the issues with carbon footprint calculations like these is that they are very dependent on the assumptions made and the calculations used. So, without going through the study line by line, I don’t know if this is true or not, but it is good to know that sending recycling waste many thousands of miles at least does not result in increased resource use. However, the environmental justice implications are still weighted against the receiving country, especially in the recycling of toxic electronic waste. This particular study only dealt with plastic and paper, so the toxic implications were fewer.

    Of course, reducing the stuff you use and reusing your stuff always beats recycling, oh ye iphone lusters, let your old phone die first!

  • | |

    More depressing water news from India

    Byoliveridley

    Climate change is a factor that will exacerbate water shortages. But the main culprits are over-exploitation, unplanned development, pollution and crazy dam building.

    The Sunday Tribune – Spectrum

    In the years to come the northern plains, heavily dependent on the Ganga, are likely to face severe water scarcity. Together with the onslaught of industrial and sewage pollutants, the river’s fate stands more or less sealed. “Among the categories dead, dying and threatened, I would put the Ganga in the dying category,” says WWF Programme Director Sejal Worah. The other heavyweight to join in the list from the Indian subcontinent is the mighty Indus. The Indus, too, has been the victim of climate change, water extraction and infrastructure development. “In all, poor planning and inadequate protection of natural means have ensured that the world population can no longer assume that water is going to flow forever,” WWF says, adding that the world’s water suppliers—rivers-on-every-continent are dying, threatening severe water shortage in the future.

    I think I will go out and enjoy the rest of this beautiful day, enough bad news!

  • Nissan goes electric

    Byoliveridley

    Nissan Shows Off Its Electric Car, the Leaf – NYTimes.com

    What, no Canada? But still,  an electric hatchback, hits all my buttons and dings all my dongs! I only hope to keep my current, explosion powered hatchback long enough to not buy one ever again. Price, of course, will be a consideration. The good news is that Nissan is considering leasing the battery instead of people having to buy it up front, a great idea, not as great as the battery instant replace model from Shai Agassi and Better Place, but one that lessens the battery buying burden.

    The future is electric.

  • | | |

    Pesticide Exposure and India's green revolution

    Byoliveridley

    Pesticide exposure in Punjab and Haryana is out of control. When I was growing up, the Green Revolution was idolized and idealized to degree that in hindsight seems a little excessive. But back then, this octupling of wheat and rice yields in Punjab and Haryana catalyzed the transformation of India from a country mired in famine and food shortages to one that occasionally runs out of room to store excess food. So, this story (courtesy of 3QD) caught my attention.

    Green.view | Chemical generation | Economist.com:

    IF INDIAN newspaper reports are to be believed, the children of Punjab are in the throes of a grey revolution. Even those as young as ten are sprouting tufts of white and grey hair. Some are going blind. In Punjabi villages, children and adults rare afflicted by uncommon cancers.

    The reason is massive and unregulated use of pesticides and other agricultural chemicals in India’s most intensively farmed state. According to an environmental report by Punjab’s government, the modest-sized state accounts for 17% of India’s total pesticide use. The state’s water, people, animals, milk and agricultural produce are all poisoned with the stuff.

    Ignorance is part of the problem. The report includes details of a survey suggesting that nearly one-third of Punjabi farmers were unaware that pesticides come with instructions for use. Half of the farmers ignored these instructions. Three-quarters put empty pesticide containers to domestic uses.

    The article concludes by saying that the government is encouraging the use of techniques including organic farming, more crop rotation, etc, and how this is ironically “reversing” the green revolution. But two separate issues are getting mixed up here. The green revolution was not won on excessive use of fertilizers, monoculture, excessive water use, and so on. Instead, the development of new hybrid, high yielding varieties of rice and wheat kick started the revolution. The wholesale adoption of water and input intensive agricultural techniques came along for for the ride with the rest of the revolution.

    Hopefully, the Punjab government will not stop at writing reports, but start grassroots education projects with the farmers to encourage sensible farming techniques that take the good parts of the green revolution and leave the bad parts out.

  • |

    Fishing Major threat to Turtles

    Byoliveridley

    Well, not the least bit surprising, sea turtles have always been very difficult to track, and we’re finally getting verification that, gasp, turtles’ lives cannot be described in simple juvenile = open sea, adult = coast behavior.

    BBC NEWS | Science/Nature | Fishing ‘major threat’ to turtles

    Until now scientists have believed that young turtles live in the open ocean, but change to a coastal habitat when they reach a certain size.

    But researchers working in Cape Verde found that most adults nesting there retain their open water behaviour, with the attendant risk posed by longline boats.

    “The bottom line is that we thought juveniles experienced this risk out in the open ocean with longline fisheries,” said Brendan Godley from the University of Exeter.

    “We thought that if you got them past that, then unless they’re being taken by inshore fisheries, you’re OK,” he told the BBC News website.

    “But now you’ve got adults exposed to longline fisheries, which is very worrying.”