|

Sea Turtle News o' the day – Global warming edition

ScienceDaily: Scientists Warn Of Climate Change Risk To Marine Turtles

North American marine turtles are at risk if global warming occurs at predicted levels, according to scientists from the University of Exeter. An increase in temperatures of just one degree Celsius could completely eliminate the birth of male turtles from some beaches. A rise of three degrees Celsius would lead to extreme levels of infant mortality and declines in nesting beaches across the USA.

Here’s the paper.

Like a lot of other reptiles, the sex of the hatchling is dependent on nest temperature. Warmer temperatures make female turtles (my mnemonic was hot females!), and even warmer temperatures just kill the eggs. But, I wonder if the turtles would adapt by nesting a little earlier. I don’t think it is yet clear when turtles decide to nest. If it is based on sea temperature, then they would eventually figure it out. This paper from 2004 appears to conclude that loggerheads in Florida do nest earlier than before, so there is hope.

John F. Weishampel, Dean A. Bagley, Llewellyn M. Ehrhart (2004) Earlier nesting by loggerhead sea turtles following sea surface warming Global Change Biology 10 (8), 1424–1427

The onset of spring, noted by the timing of wildlife migratory and breeding behaviors, has been occurring earlier over the past few decades. Here, we examine 15 years of loggerhead sea turtle, Caretta caretta, nesting patterns along a 40.5 km beach on Florida’s Atlantic coast. This small section of beach is considered to be the most important nesting area for this threatened species in the western hemisphere. From 1989 to 2003, the annual number of nests fluctuated between 13 000 and 25 000 without a conspicuous trend; however, based on a regression analysis, the median nesting date became earlier by roughly 10 days. The Julian day of median nesting was significantly correlated with near-shore, May sea surface temperatures that warmed an average of 0.8°C over this period. This marine example from warm temperate/subtropical waters represents another response of nature to recent climate trends.

So the truth lies somewhere between easy adaptation and giant swarms of frustrated female turtles!

Similar Posts

  • Nepotism, Environmental Edition – High alert

    In the fast emerging banana republic that is the US of A, apparently, and this was news to me, the vice president’s son-in-law wields a lot of power! I am laughing very hard at the cronyism while I remain concerned about the effects. But, remember Americans, democracy begins at home! While you’re busy lecturing, and invading other countries to “spread democracy”, your vice president’s family acts as if their “descended from god” line to the throne gives them divine right to rule by fiat.

    Dick Cheney’s Dangerous Son-In-Law – Art Levine

    To understand the workings of Philip Perry is to get a sense of the true lines of power in the executive branch. “Perry is an éminence grise,” says one congressional staffer. “He’s been pretty good at getting his fingerprints off of anything, but everyone in this field knows he’s the one directing it. He is very good at the stealth move.” And, as it turns out, Perry’s stealth moves have often benefited opponents of chemical regulation. One of his final pieces of handiwork included coming up with what critics have called an “industry wish list” on chemical security that ultimately became law last fall. “Every time the industry has gotten in trouble,” says the staffer, “they’ve gone running to Phil Perry.” The result has been that our chemical sites remain, even five years after 9/11, stubbornly vulnerable to attack. Philip Perry has hardly been alone in tolerating this. Others in the White House and Congress have been equally solicitous toward the chemical industry. But as part of a network of Cheney loyalists in the executive branch, Perry has been a key player in the struggle to prevent the federal government from assuming any serious regulatory role in business, no matter what the cost. And a successful attack on a chemical facility could make such a cost high indeed. A flippant critic might say the father-in-law has been prosecuting a war that creates more terrorists abroad, while the son-in-law has been working to ensure they’ll have easy targets at home. But it’s more precise to say that White House officials really, really don’t want to alienate the chemical industry, and Perry has been really, really willing to help them not do it.

    Nice work. The alternative that the EPA wants to pursue is called inherently safer technologies, or IST. Read the whole article to follow all the behind the scene machinations. Next time a pesticide plant blows up in N.J releasing tons of chlorine, you can bet that none of the people involved in these maneuvers will be anywhere near the fallout!

  • Carrboro Screening of "After the Peak"

    I happened to watch an interesting short film called After the Peak about peak oil, the concept (not that revolutionary unless you ask Messrs  Exxon-Mobil, Shell and Dick Cheney!) that oil production will start declining after a certain peak production event. The docudrama made by local film maker James McQuaid was part of a public meeting on the local (Orange County, NC) responses to the coming energy crisis. Interesting conceptually, it was shown as a 30 minute local newscast, with the usual cast of characters, the too handsome eye candy anchor and his female sidekick, the young and breathless “street reporter”, the gray haired expert, and the uber-energetic sports guy! The newscast is set a year into the future when the price of gas is $10/gallon. The documentary of interviews with various community members about the effects of the price of gas on their business/life. In the 30 minutes, he touched upon food, school buses, sports, NASCAR, the poor, commutes, etc. It was an interesting effort, if a little over the top! The fake interviews with the racing track owner who’s closing his track down, the UNC athletic director who has to cancel all his long distance events, the manager of the local food store who threatens food scarcity.

    But is $10 a gallon really a big deal?

    gas-prices.png

    This simple chart shows income adjusted dollar per gallon gas prices (gas prices from 2006, income from 2004, but it should not change too much.)

    Let’s avoid the low income outliers and just compare the U.S and Germany. In April 2006, the U.S was paying $2.95 a gallon and Germany, $8.06 per gallon (ref). If you further adjust that with the per capita income of the two countries, $41,300 for the U.S versus $30,500 for Germany (ref), you will find that the price of gas in Germany is well above $10 a gallon already, they seem to be doing just fine! Maybe they just drive less. The US uses 381 million gallons of gas per day (that’s about 1.2 gallons per day per person). I agree that this comparison is a little flawed because the bulk of the German price is due to taxes, which go back to the government and are presumably used for various good deeds. Also, if the price of gas went up due to shortages, the price differential between Germany and the US would presumably stay constant (unless the Germans lowered taxes). My point is that many countries cope with high gas prices quite well, they just don’t make the same choices the Americans make, 1 acre lots, large SUVs, super long commutes, etc. There are a lot of efficiencies to be had here. The graph below shows the income adjusted gasoline price for a few countries (easy data was available!)

    My take: we need to swiftly move away from gasoline by a) Disincentivizing the use of gasoline in transportation b) Incentivizing the use of electricity for transportation. Electricity can be produced more efficiently, and pollution at the source can be controlled more effectively. A combination of a drastic increase in solar and wind power, coupled with aggressive development in battery technology should more than solve our problem without much recourse to biofuels (that great boondongle).

  • Environmental Racism at work

    Could not get any clearer than this.

    ScienceDaily: Study Verifies More Hazardous Waste Facilities Located In Minority Areas

    The other side of that argument is that the hazardous waste facilities came first, which causes the neighborhood demographics to change. As that argument goes, the more affluent white people move out, and poorer minority people are forced to stay or move in, said Paul Mohai, a professor in the U-M School of Natural Resources and Environment. However, done in collaboration with Robin Saha, a former U-M PhD student and post-doctoral scholar, now an assistant professor at University of Montana, shows that minorities were living in the areas where hazardous waste facilities decided to locate before the facilities arrived. Their study also shows that the demographics in the neighborhoods were already changing and that white residents had already started to move out when the facility was sited. “What we discovered is that there are demographic changes after the siting but they started before the siting,” Mohai said. “Our argument is that what’s likely happening is the area is going through a demographic shift, and it lowers the social capital and political clout of the neighborhood so it becomes the path of least resistance.”

    This is not just about the money. Over and above social capital and political clout, it seems that race trumps all.

    Using the new method, researchers have found that racial disparities in the location of hazardous waste facilities are much greater than previous studies have shown. Furthermore, the disparities persist even when controlling for economic and sociopolitical variables, suggesting that racial targeting, housing discrimination and other factors uniquely associated with race influence the location of the nations’ hazardous waste facilities.

    Depressing.

  • Liquid Coal, Hitler's Fuel!

    Congress weighs coal fuels, carbon questions linger – Apr. 23, 2007

    The technology, developed in coal-rich Germany in the 1920s and used heavily by the Nazis in World War II, involves partly burning coal to turn it into a gas, then using a catalyst, usually a metal, to make it a liquid.

    The basic premise of liquid coal (using the wonderful Fischer-Tropsch Reaction) is that “plentiful and easily available” coal is converted into diesel that can be used for automobiles. Liquid coal is yet another wonderful distraction in the quest for clean energy sources.

    The attraction of using a plentiful domestic energy source is obvious. It would help cut our reliance on oil, about a quarter of which comes from the Middle East and Venezuela.

    It also keeps money stateside, flowing to coal miners instead of countries with links to terrorists, which explains why the coalition’s members include several labor unions.

    mountaintop_phixr.jpg
    You mean, you willl do this to every coal mining town just so you don’t have to increase fuel efficiency by 25% and avoid “terrorist” oil? Jeez, and this casual assumption of “if we don’t buy their oil, terrorism will decrease”. Patriotism and blatant fear mongering can be used to sell anything, apparently. Coal mining is one of the most destructive and harmful operations you can imagine. Here’s a short summary (LINK)

    It is difficult to explain the scope and impact of mountain top removal to people who have not seen it. Some sites cover three and four thousand acres. Millions of cubic feet of land are blasted away by explosive charge to get at the thin seams of coal underneath the mountain tops. Trees, rocks, soil-in short, everything but the coal-is considered “overburden.” Land is devastated, and afterwards the ground must be compacted so hard to stabilize it that nothing but scrub grasses will grow. Rains rush off the denuded mountain tops at an alarming rate.

    Of course, like all other carbon rich fuel sources, carbon sequestration remains a must for any possibility that we can see a decrease in carbon emissions coupled to an increase in carbon fuel use.

    Henry said that “carbon storage” – an untested technology where about half the carbon dioxide in coal is removed and injected underground – can make liquid coal so that it emits 60 percent less carbon dioxide than gasoline.

    “This statement is total garbage,” said Pete Altman, coal campaign director at the National Environmental Trust, saying the study Henry was referring to compared a hybrid diesel engine to a gasoline engine

    So we’re willing to go to greatly increased carbon emissions, devastated country side, increased water pollution, air pollution, mining deaths, etc. just so we don’t increase fuel efficiency by 25%? Wow, priorities!!

    The bill is expected to make it to the Senate floor in the next few weeks, and both Democrat and Republican staffers say a Republican sponsored amendment allowing for liquid coal is likely.

    Other bills provide loan guarantees for companies building coal-to-liquid plants, which typically cost $3 billion to $5 billion apiece, as well as guaranteed price support if oil falls below $40 a barrel.

    It seems clear the industry needs government help to succeed. Lawmakers have to decide if they are willing to fund a fuel that appears to do little to cut greenhouse gases.

    I am sure lawmakers will make it happen as long as their lobbyists want to make it happen, if it means subsidies, relaxation of pollution rules, and other such shenanigans, so be it.

    Go Solar!.

    Note: the blog Environmental Action follows the liquid coal story very closely and had a post on this very article. Reading this blog, you will find that the great savior Barack Obama is also a liquid coal acolyte (It’s that whole midwestern pandering to coal and ethanol!)

  • |

    Tuesdays with Turtles – Right Flipperedness Edition

    Across a population studied by scientists, more turtles preferred to use their right rear flipper rather than their left when laying eggs.The result, published in the journal Behavioural Brain Research, is the first time a species of turtle has found to prefer one limb over another.The discovery adds to growing evidence that even lower vertebrates prefer to use one side of the body more often.Such preference is known by scientists as a “lateralised functional behaviour”, and it usually indicates that an animal's brain function is also lateralised, with one side of the brain dominating control of certain tasks.

    via BBC – Earth News – Turtles are ‘right-flippered’.

    Ha, just when you thought Tuesdays with Turtles was gone, it is Tuesday (here in Canada) and a sea turtle post. Turns out, leatherbacks, the biggest of ths sea turtles and critically endangered tend to be right flippered while on land and laying eggs. A slight predilection to right sidedness runs all the way down to reptiles. It is 54%-46%, which does not seem like much, but the report indicates that among humans, it is the same once you control for a cultural right hand bias!

    Anyway, got to love those sexy beasts, even if they’re right flippered, right Ned?

  • Recycling better than landfilling even to China

    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!