Author: Amy Freitag

“You Could Walk On The Backs of Sea Turtles”

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Sea turtle research is unique in that many if not most of the people actually out in the field taking data are volunteers. By day, they are teachers, librarians, business owners, lifeguards, firefighters, students, retirees, you name it. If you’re curious, check out the network’s website. Sea turtles are the classic cute endangered animals that can really make someone care about marine conservation. And all of this data has gone to help produce population assessments such as this that confirm that while overall population is declining, some areas are actually increasing. But no where is back to the populations on which people could walk out to sea on the backs of turtles.

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Chemistry of the Great Big Blue: Nutrients

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Science

The Great Big Blue looks like it contains nothing but water and maybe a little salt, especially out in the open ocean. However, this kind of sparse environment is exactly where the chemistry matters the most – it’s a fine line between not enough, too much, and just right. Given this, there’s no distinct myth here but an underlying unresolved question: what is the limiting factor that keeps the open ocean at low productivity?

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Our favorite sea monsters – Mermaids (#5)

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Mermaids occur in legends from cultures around the world and vary in shape, origin, and intent. From the beautiful temptress on the cliffs luring boats onto dangerous shoals to peaceful coexisting aquatic humans, mermaids have made a place for themselves in history. The basics of merfolk is that they are neither human nor fish but some sort of mammal that includes elements of both. They are musically talented and astoundingly beautiful.

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The Green Flash

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Legend goes that just as the sun sets below the horizon, a flash of green light appears to kiss the day goodbye. Sailors say that when the flash appears, it means a soul has crossed over. Jules Verne wrote that those who witnessed it could no longer be deceived because he could read the thoughts of others. Admiral Byrd supposedly saw one that lasted 35 minutes.  For a full record of sightings, see here.  But is this really stuff of legend or a real phenomenon in the sky?

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The Gentle Tasaday: An anthropological hoax

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In 1971, a group of people known as the Tasaday were discovered on a remote island of the Phillipines known as Mindanao. They wore leafy loincloths and subsisted off what the forest could provide, possessing no knowledge of tobacco, corn, rice, or domesticated animals. They spoke a new dialect of Malay-Philipino language that included no word for outsiders, war, weapon, or enemy, giving them the title ‘The Gentle Tasaday’. The family unit was nuclear and the community has no formal organization or government outside of some loose food-sharing networks.

Today, Tasaday life is way different and matches more modern tribal life in the Phillipines, as documented on their website. The question is, however, whether this modernization was normal development post-contact or whether there was a hoax involved.

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Chemistry of the Great Big Blue: Metals

Posted on By Amy Freitag 1 Comment on Chemistry of the Great Big Blue: Metals
Science

The ocean is full of metals and minerals that naturally occur such as zinc, copper, and cobalt and many marine organisms therefore depend upon access to those metals in small concentrations. However, inshore marine systems receive inputs from industrial, mining, and stormwater runoff that far exceed what these organisms can use. So what’s the effect?  There was recently a good review article by Mayer-Pinto et al describings the effects of these metals at the assemblage level that basically did my job for me, research-wise, covering both marine and freshwater systems.

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Chemistry of the Great Big Blue: Petroleum Byproducts

Posted on By Amy Freitag 2 Comments on Chemistry of the Great Big Blue: Petroleum Byproducts
Science

In light of the BP oil spill, this week’s installment of Chemistry of the Great Big Blue will be particularly relevant to current events and hopefully already on the minds of everyone reading. Where do petrochemicals in the marine environment come from other than oil spills? Road runoff, refineries, plastic production, plastic degradation, atmospheric deposition and ocean circulation from other parts of the world, natural seeps, and the list goes on and on. It is important to note, however, that oil spills are not necessarily the predominant source of petrochemicals.  So what exactly is a petrochemical and what does it do?

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