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Sea Turtle News o' the day – Global warming edition

Byoliveridley

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!

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    Byoliveridley

    Courtesy the grist, my favorite environment related website…

    GreenScanner

    This site is a public database of opinions about the environmental friendliness of various products. It has been designed for use with network-enabled mobile devices so you can use it at the food store. Type in a UPC code and hit “Go” to see what people think about the product (1 is bad, 5 is good). Then you can then add a comment and score of your own!

    This is a start. What we need (I was thinking about this making dinner yesterday) is an easy link between a product’s UPC and its Life Cycle Analysis, if it even exists…

  • Tuesdays with Turtles – Outback Edition

    Byoliveridley

    flatback-kp.jpgWell, since this blog gratuitously takes its name from a sea turtle, it’s only fair that there needs to be a turtle post at least once a week! Why Tuesday? Because it alliterates. Why not Thursday? Because apparently, Tuesday’s the day that you do things with other things, ask Morrie.

    I confess to knowing very little about the flatback. It’s only found around Australia and is listed as threatened. This news item caught my attention (for obvious reasons)

    Turtles may fall victim to Australian gas project – International Herald Tribune

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  • Au Revoir, Clean Water Act?

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    Just like that, the Supreme Court chips away at one of the foundations of this country’s Environmental Law.
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    By DAVID STOUT. WASHINGTON, June 19 — The Supreme Court set the stage for a re-examination of the 1972 Clean Water Act, as it narrowly ruled today in favor of two Michigan property owners who have sought to develop tracts designated as wetlands.

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    I was very afraid when I last thought about this challenge way back in February. It was pretty clear at that point that Kennedy was the swing vote and that 8 out of 9 minds were probably made up. Kennedy’s lawmaking seems to be a little incoherent in this case. He was obviously not comfortable with the Scalia-Alito-Roberts-Thomas cabal’s clearly ideological decision, but can’t bring himself to make the centrist decision.

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    If you thought that there was a “significant nexus”, what kind of logic would then make you turnaround and support the opinion that there is no connection?

    But Justice Scalia had a different perspective as he questioned the extent of federal jurisdiction. Under the government’s logic, he said, “a storm drain, even when not filled with water, is a tributary.”

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    Where Hon. Justice Scalia pretends to misunderstand the concept of drainage? I wonder if he would feel the same way if it was a pollution issue in his neighbor’s backyard.

    This will make things confusing for a while, and you all know who confusion favors!

  • Please stop drinking bottled water

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    This blog(ger) is not prone to order people around, but it is going to now. STOP DRINKING BOTTLED WATER. If you live in a reasonably well taxed/well run town in the first world, just drink from the tap. If your town’s drinking water sucks, get a water filter/purifier, use a refillable drinking water system, and lobby your town council hard to improve their drinking water infrastructure so you can drink from the tap.
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  • Nanoparticles the new asbestos?

    Byoliveridley

    I am sure everyone has heard about the wonders of nanotechnology, but what about the other side?

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    There was a time when asbestos was the wonder material, malleable and fire resistant, capable of being woven into sheets, and being incorporated into buildings for fire retardation. Unfortunately, many cases of asbestosis and mesothelioma later, not so wonderful. Asbestos is a special case because the fibers started out big and would keep breaking down into smaller particles till they reached that magic size range between 0.1 and 1-2 um where they could stay suspended in the air for a long time, and also take advantage of the lungs’ inability to filter particles that size to any great degree of efficiency.

    Nanoparticles are an order of magnitude smaller, and hence behave more like gases. They may  also contain choice toxic heavy metals such as manganese which are not usually floating around in the air at these small sizes. So, this study is a little scary, especially for the folks in the manufacturing end of things, these miracle particles seem to be going straight to the brain. Traditional masks and air handling systems are not designed to filter such fine particles, so I am sure they’re floating around in the air waiting to be breathed in.

    Update 9:00 AM, 8-3-2006
    Well, I swear, I did not see this before I wrote this morning!

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  • Gapminder -Visualize Global Development Data

    Byoliveridley

    I must have been living in a cave somewhere to not have heard of this before today.

    The Gapminder World 2006, beta

    Gapminder is a non-profit venture that develops information technology for provision of free statistics in new visual and animated ways. In short, it enables you to make sense of the world by having fun with statistics. Our method is to turn boring data into enjoyable interactive animations using Flash technology. Gapminder is a Foundation in Stockholm, Sweden. Funding has been mainly by grants from Swedish International Development co-operation Agency, Sida. In collaboration with United Nations Statistic Division we promote free access to searchable public data and our animations of different types of data are freely available at www.gapminder.org.

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    Regardless, very cool, and nothing beats free access to large amounts of data that previously needed specialists to visualize and make sense of.