Glowing Snail: Scripps studies bizarre illuminating mollusk

This was a fun piece of news that caught my eye from the Scripps Institution of Oceanography in San Diego, California. It seems there is a small sea snail that can produce bioluminesence, strong enough with which it can illuminate the entire shell.

Researchers Dimitri Deheyn and Nerida Wilson have studied a particular species of "clusterwink snail" which has the ability to produce light but uses it in a way that is different from other bioluminescent creatures. Typically, bioluminesence is more focused - a dangling light lure atop a deep sea angler fish, a row of lights along a fish's lateral line, or literally a pair of high beams under the eyes. But with this particular snail, the light is emitted in all directions and the shell adds to the overall effect.

"It's rare for any bottom-dwelling snails to produce bioluminescence," Wilson said. "So its even more amazing that this snail has a shell that maximizes the signal so efficiently."

In a paper published in the Proceedings of the Royal Society B (Biological Sciences), the researchers theorized that the bioluminesence acted as a kind of "burglar alarm" triggered at the presence of a predator. The diffusion of the light caused by the shell perhaps makes the snail look bigger than it is and therefore a less appealing easy catch for a hungry crab or shrimp. The researchers are interested in the implications of how light can be transmitted through various materials, like the shell. Also curious is one of the study's funders, the U.S. Air Force, who would be interested in how this research could perhaps provide new approaches to better illuminate instruments and aircraft data readouts.

"Our next focus is to understand what makes the shell have this capacity and that could be important for building materials with better optical performance," said Deheyn.

Military applications aside, I find it very fascinating. It reminds me of the various little "glow-in-the-dark" plastic critters I had as a kid that would illuminate my room when the lights went out. But nature's parlor tricks are always way cooler.

Read the Scripps news release on the glowing snail.

Ocean Trash & Climate Change: California takes some small steps in research and adaptation

A couple of interesting items coming out of my home state of California:

You may have heard of the Great Pacific Ocean Garbage Patch, this floating mat of various plastic and trash items that has accumulated due to a convergence of several ocean currents. The "patch" is no small area, estimated to be almost twice the size of the state of Texas and posing an obvious health hazard to sea animals, like sea birds (who mistakenly feed on the debris), or land animals (as fragments of the patch float ashore).

Researchers and students from the Scripps Institution of Oceanography in San Diego, CA are planning a 20-day expedition to better map out this growing reminder of our non-biodegradable product dependence. They will investigate to determine it's size, depth, and make-up. And they will examine its contents in detail to determine whether it is harboring additional pollutants or any invasive species.

What's to be done about the garbage patch in the future remains unclear. Formed by oceanic forces out of our control and residing in open international waters, addressing its removal has been an international and diplomatic challenge. Certainly we know what to do to not add anymore waste to it, but how do we deal with the current situation? Hopefully, an international solution will be reached but it will require considerable technological and logistical resources.

California has often taken stronger environmental positions than those emanating from the federal government, but that is because California lawmakers recognize that the state, both, has a lot to lose if nothing substantial is done, and that the state has been a major contributor over the years to environmental problems ranging from CO2 emissions to overfishing.

In Yosemite National Park, research has been taking place to compare the growth of large-diameter trees. Comparing records dating back to the early 30's, it has been determined that there has been a marked reduction in the density of these trees by as much as 24%.

"Climate change is a likely contributor to these events and should be taken into consideration," said Jan van Wagtendonk, a U.S. Geological Survey scientist. "Warmer conditions increase the length of the summer dry season and decrease the snowpack that provides much of the water for the growing season. A longer summer dry season can also reduce tree growth and vigor, and can reduce trees' ability to resist insects and pathogens."

In addition to the reduced growth, the current condition of the trees exposes them to greater wildfire danger, as there has been a marked shift in some areas from ponderosa pines, a more fire-retardant species, to less fire-retardant white fir and incense cedar.

While California attempts to push some of the boundaries of environmental policy, it apparently recognizes the bureaucratic logjam that impedes new direction in national and international energy and environmental strategies. The California Natural Resource Agency has issued a preliminary report for public review on the subject of climate adaptation - a strategy wherein it is recognized that there will be inevitable climate-related changes and proposes changes in policies and regulations to deal with them. This means preparing for the worst: heat-waves, rising sea levels, flooding, wildlife die-offs, and more.

It is somewhat reassuring to know that a government agency truly recognizes the implications of climate change. But it is unfortunate that this realization comes at a time when, apparently, prevention is not an option regarding some of its impact. This is not to say that we should throw up our hands in defeat. On the contrary, it is reason for us to double our efforts so as to minimize these effects and perhaps even reverse them in the future.

Birch Aquarium: Island of the Great White Shark screens to a full house

On Tuesday, January 6th, the Birch Aquarium at the Scripps Institution of Oceanography in beautiful La Jolla, CA hosted a screening of Island of the Great White Shark. At the conclusion of the film I had the opportunity to discuss the film with the standing room only audience. The pressing issue of conservation and the value of eco-tourism were discussed along with the importance of understanding the shark's role in maintaining a balanced marine ecology.

My sincere thanks to the Birch Aquarium and its staff for promoting and managing what turned out to be a very successful evening (a special thanks to Lydia Cobb, Marketing Manager and Jessica Crawford, Communications Specialist). After a series of media interviews arranged by the Aquarium, the day of the event arrived and I was treated to a behind-the-scenes tour of the Aquarium and had a chance to sit down and discuss shark research with several of Scripps' top shark research grad students. It was very encouraging to hear about their efforts to learn more about these amazing animals so that we can take the proper steps to ensure their survival.

The Birch Aquarium plays a unique and vital role as a conduit through which the Scripps Institution of Oceanography can enlighten the public to many of the important marine issues being studied by this world renowned research organization - from climate change to marine wildlife conservation. The institution was established in 1903 and became a part of the University of California, San Diego a few years later. With a fleet of research vessels and state-of-the-art research facilities, the institution is one of the leaders in its field and has produced generations of accomplished research scientists and educators across a wide range of oceanographic disciplines.

Again, my thanks to the Birch Aquarium. If you are traveling in the San Diego area, carve out a few hours and stop by for a visit. It will be time well spent.

Birch Aquarium to screen "Island of the Great White Shark"

For those of you in the San Diego/Southern California area, here's some information on an upcoming screening/lecture of Island of the Great White Shark at the Birch Aquarium on Tuesday, January 6th.

Following the screening, I'll be there to take questions and prattle on about filming sharks, shark conservation and the latest news regarding Isla Guadalupe's white sharks.

If you have the time before the event, take a stroll around the aquarium. It's a wonderful showcase of not only the oceans but oceanography as the aquarium is affiliated with the Scripps Institution of Oceanography, one of the nation's leading educational and research organizations devoted to marine science.