Stories tagged algae

May
07
2012

Carbon dioxide, you light up my life. Or you could, anyway, if this weirdo has his way. Said weirdo is biochemist Pierre Calleja, who has developed a light that can run on carbon dioxide rather than electricity. His secret: green algae that produce energy when they consume CO2.

The mucklight powerhouse: Gross.
The mucklight powerhouse: Gross.Courtesy Jim Conrad

One large lamp he installed in a parking garage consumes up to one ton of CO2 per year. While that's just a drop in the air--the US alone emits almost 5.5 thousand metric tons per year--just think how much these lamps could consume if we replaced all the streetlamps, parking ramp lights, and other environmental lamps with them. It sounds like a pretty great idea when you consider that CO2 is a major driver of global-scale changes in our climate. Whoda thunk we could tackle our warming climate by turning on the lights?

Yup, it's Friday. Time for a new Science Friday video. Today: Science Friday
Science FridayCourtesy Science Friday
"The New York Department of Environmental Protection installed a prototype "algal turf scrubber" at once of its wastewater treatment plants in Queens. The scrubber--two 350-foot metal ramps coated with algae that grows naturally--is designed to use algae to remove nutrients and boost dissolved oxygen in the water that passes through it. John McLaughlin, Director of Ecological Services for the New York City Department of Environmental Protection (DEP), and Peter May, restoration ecologist for Biohabitats, explain how the scrubber works, and where the harvested algae goes."
Dec
15
2010

If it had hands: it would be holding your life in them. Just saying.
If it had hands: it would be holding your life in them. Just saying.Courtesy splorp
Gather ‘round, Buzzketeers, so that I might tell you all a story.

“What story,” you ask?

Is it the one about the little blond girl who is killed by bears for breaking and entering? No, not that story.

Is it the one about the boy who killed an acromegalic man by cutting down the tree that held his fort? No, it’s not that story either.

Could it be the story about the little Blood member who couldn’t tell the difference between a wolf and her own grandmother, and was subsequently devoured by that very wolf? Oh, I wish it were, but it’s not that story.

No, the story I have for you all is even more enduring and horrifying than all of those. It is the story of biodiversity, and how it will freaking destroy you if you mess with it.

Sure, snort dismissively if you must, but you’ll soon be singing a different tune. A sad tune about how everything you ever knew and loved has been taken away from you.

“But how can a concept—and a boring concept like “biodiversity”—hurt me?” Ah, see, but what you don’t know can hurt you. You’re like the little blond girl, screwing around in a house that belongs to bears. She might not have known that it was a bear house (although it’s hard to imagine that she could have missed all the signs), and yet she was destroyed. So listen up.

You see, all biodiversity is is the degree of variation of living things in an ecosystem. Lots of biodiversity in an ecosystem, lots of different things living there. Little biodiversity in an ecosystem, few species living there. And biodiversity includes all forms of life, from your vampire bats and hagfish, to your streptococcus and your slime molds.

At the moment, biodiversity on the planet is on its way down. Lots of the things we do these days make life harder for other species, until there are very few or none of them left. And, sure, no one wants to see a panda get hit by a train, or watch an eagle being run over by road grading equipment, but who cares about the smaller, grosser stuff, like algae or germy things? We could probably do with a few less of those, right? Right?

Wrong, Goldilocks! An attitude like that is bound to get you turned into bear meat.

And here’s where my story begins (again)…

Once upon a time, long, long ago, everything died.

Well, not everything-everything, but pretty well near everything. It was called “the Permian extinction” (we’ve talked about it on Buzz before: here), and more than 90% of all marine (water) species and 70% of all terrestrial (land) species on the planet went extinct. It was way worse than the extinction that would eventually kill off the dinosaurs, and it took the planet a lot longer to recover from the Permian extinction.

What caused the Permian extinction? Oh, you know, a lot of stuff. Probably a lot of stuff. See, while we can more or less say that the dinosaurs were killed off by a giant space rock, it’s harder to say what did in the creatures of the Permian period. After all, the Permian ended almost two hundred million years before the extinction of the dinosaurs. But people have plenty of good guesses: maybe a few smaller space rocks hit the planet, maybe massive volcanic eruptions in what would become Asia kicked dust and poisonous gas into the atmosphere, maybe the oceans suddenly released massive amounts of methane… probably it was a combination of these things and more, and the extinction probably happened in waves before the planet became a good place to live again.

But here’s another straw for that dead camel’s back: the algae died. Not all of it, but lots and lots of the algae died. But why, and why did it matter? After all, it’s just algae.

Scientists aren’t sure exactly what cause so much alga—microscopic plant-like ocean life that turns sunlight into food—to die, but it looks like a sudden rise in the levels of sulfur in the oceans might have had something to do with it. It could be that there was an explosion in the population of sulfur using, hydrogen-sulfide releasing bacteria in the oceans, which would poison the algae.

In any case, there was a large die off of the sort of species we don’t give a lot of thought to. And what happened? The bear meat hit the fan!

Because they turn so much sunlight into so much food, algae act as the basis for most marine food chains. When the algae were gone, photosynthetic bacteria took its place to some extent, but the bacteria were a poor substitute, and the oceans were left with much, much less food. Also, algae produce a significant amount of the planet’s oxygen, and their absence would have created atmospheric changes as well.

This alone might have been enough to cause extinctions, and combined with the other natural calamities of the end of the Permian, it’s no wonder there was such a massive extinction event.

What a good story, eh? Now, if someone asks you what’s so great about biodiversity among the slimier and more boring species, you can just repeat this post, word for word. Or you can repeat this, the short version, word for word: “Because, Mom, if the algae die, we’ll be left choking and crying among the ruins of humanity for the rest of our short lives. And happy birthday.”

Sep
23
2010

You might be aware of phosphorus, P, as a key ingredient in your lawn fertilizer. Or, perhaps you’ve seen “Does not contain phosphates” labels on your household detergents. If you haven’t seen these labels yet, chances are high you’ll see them soon. Why??

Phosphorus is Useful as Fertilizer and Detergent...

Fertilizer with P: See the N-P-K?  The P stands for phosphorus.  The number 21 below it tells us the percent of P in the fertilizer.  Many lawn fertilizers are now 0% P.
Fertilizer with P: See the N-P-K? The P stands for phosphorus. The number 21 below it tells us the percent of P in the fertilizer. Many lawn fertilizers are now 0% P.Courtesy Malawi MV project work

Phosphorus is a life-supporting mineral, which is why so many fertilizers contain it. Phosphates, the naturally occurring form of phosphorus, help soften water, form soap suds, and suspend particles making them choice detergents. Supporting life and keeping clean would normally be good things, but phosphorus has a dark side too.

... But, Phosphorus Causes Smelly, Dead Eutrophication

Because phosphorus is so good at growing stuff, it is actually harmful to the environment when it becomes dissolved and concentrated in bodies of water. Phosphorus-rich lakes cause algae blooms – huge increases of algae in a short period of time (kind of like the post-World War II Baby Boom, but for algae). Besides being smelly and turning water green, algae “breathe” the oxygen right out of the lake! Stealing dissolved oxygen even in death, algae create hypoxia – low oxygen, which prevents most other living things from surviving in the surrounding area. This whole process, from phosphorus-loading to algae bloom to hypoxia, is called eutrophication. There are other environmental and health risks to phosphorus, but eutrophication is what politicians are talking about around the water cooler these days.

Icky Algae Bloom: Algae blooms occur in nutrient-loaded water bodies and often led to hypoxia in a process called eutrophication.
Icky Algae Bloom: Algae blooms occur in nutrient-loaded water bodies and often led to hypoxia in a process called eutrophication.Courtesy Felix Andrews

Seventeen States Banned Phosphorus in Automatic Dishwashing Detergents

Deciding that euthrophication was yucky, in July, 17 states, including the entire Great Lakes Commission of which Minnesota is a member, passed laws banning phosphates from automatic dishwasher detergent. That might not seem like a big deal, but automatic dishwasher detergent is said to comprise between 7-12% of all the phosphorus making it into our sewage system (source). Previous legislation has limited or banned phosphorus in lawn fertilizers and laundry detergents.

Consumers Asked to Cope

According to a recent New York Times article, some consumers are getting their feathers ruffled as detergent manufacturers re-do their formulas to comply with state laws. The primary complaint is that the phosphate-free detergents don’t clean as well as traditional formulas. Consumer Reports concurred: of 24 low- or no-phosphate detergents tested, none matched the cleaning capabilities of detergents with phosphates. It may be uncomfortable at first, but learning to cope in a low-phosphorus world is already having environmental and human health benefits.

Green Cleaning: There are several line of green cleaning products that contain low- or no-phosphates.
Green Cleaning: There are several line of green cleaning products that contain low- or no-phosphates.Courtesy Becoming Green

Rest assured, industry officials still want your business and are continually improving their formulations. Indeed, the same Consumer Reports article mentioned above rated seven low- or no-phosphate detergents as “very good.” For the curious, there is a multitude of other websites reviewing phosphate-free detergents online. Pre-rinsing and/or post-rinsing have also been cited as ways to deal with phosphate-free dishwashing detergents.

Peak Phosphorus: Another Consideration

If you still aren’t convinced of the switch, consider this: we’re running out of phosphorus like we’re running out of oil. Phosphorus is a mineral, mined from naturally occurring phosphates, and we’re mining it faster than geologic cycles can replenish it. One Scientific American article cites the depletion of U.S. supplies in a few decades (world supplies may last for roughly another 100 years) given current consumption rates. Without phosphorus, world food production will plummet and with a global population soaring towards 9 billion people, that would be a very sorry state of affairs. If we succeed in limiting our phosphorus consumption, say, through eliminating it from household detergents, we may be able to continue using it in fertilizers and thus keep the human population fed well into the future.

What do you think? Is the phosphate-ban worth it?

Jul
20
2009

A Forest of Fuel: Coming soon, to your gas tank!
A Forest of Fuel: Coming soon, to your gas tank!Courtesy Stef Maruch

Move over, old, lame bio-fuels!

Algae! The wondrous plants that can grow easily in controlled conditions and whose needs are very basic for rapid growth is now being tested for use in bio-fuels. ExxonMobil, looking to expand and diversify their alternative fuel options will team up with Venter's Synthetic Genomics Inc. to conduct research on different types of algae to test their effectiveness as biofuels.

The so-called "first generation" bio-fuels caused problems globally when the price of corn (for corn ethanol) sky rocketed when it was being used for food and fuel . Though a small percent of corn (or other) ethanol is added to gasoline, it still has a huge effect on the market, and is therefore not the best long term solution to eliminating our addiction to oil.

The Future?: Someday...someday. Let's keep 'em crossed for a day when all houses are like this!
The Future?: Someday...someday. Let's keep 'em crossed for a day when all houses are like this!Courtesy Bjorn Appel

Many view bio-fuels as only a transitionary solution to the oil problem, hoping that a sustainable energy type (like solar or wind) may soon be widely available. Algae if successful as a bio fuel, it may be used for a longer period than the "first-generation" bio fuels because of how fast it can grow and how easy it can be to care for. It also isn't used for much else, not like corn anyway. Engineers are hoping to develop artificial environments for algae to grow in knowing that this is the only way to produce enough of the green slime to sustain our needs.

It is encouraging, in some ways, that a big business like ExxonMobil is getting involved because research will not be short funded. If there is a will, there is some green slime that can't wait to get in your car!

Jul
16
2009

The burning you feel is your childhood evaporating: Also, your skin.
The burning you feel is your childhood evaporating: Also, your skin.Courtesy jurvetson
Ho-ly spit.

Zo-mg.

We are in deep trouble, friends, enemies and Buzzketeers.

Screw rising sea levels. Nuts to dwindling glacier-based freshwater reserves. Forget desertification. The real danger of global warming we’ve known about since 1958 and we’ve done nothing to prevent it. In our arrogance, we thought we’d be safe forever, but now the chickens have come home to roost. And they’re roosting hard.

Is it possible that you don’t know what I’m talking about yet?

Well, let me explain it to you in a roundabout way.

Remember being a kid in 1958, sitting in your home entertainment room, petting your chinchilla in the dark (not a euphemism), and eating a box of Gushers as you watched your Blu-ray of Steve McQueen’s The Blob? Remember how you felt when that little piece of space goo started to eat that old dude’s hand? Those Gushers burned like the blob’s acid touch, no doubt. And remember when you realized that no amount of hot lead was going to stop the blob, because, duh, why would bullets hurt space goo? You probably squeezed your poor chinchilla to death in your anxiety. Do you recall the little pinprick of hope you felt at the blob’s response to a blast from the CO2 filled fire extinguisher, and the final surge of relief as they crated the awful thing to the arctic, where it could be kept in safety… JUST SO LONG AS THE %@$##$%ING ARCTIC STAYS COLD… QUESTION MARK????!!!!!!!!!

If your chinchilla wasn’t dead already, it didn’t stand a chance at that point, because you were convulsively squeezing everything within reach, and vomiting half-digested Gushers all over your parents’ modern Scandinavian furniture. But no, soothes your nanny, as she strokes your hair and gently clears the Gushers from your airway, that could never happen. It’s the arctic she says, and, standing in the lit doorway behind her, your personal chef nods reassuringly. That’s why they call it “the arctic,” he says in his heavy Japanese accent. Your normal childhood is safe from a life of constant monster threat.

Or so you thought. It’s fifty years later, the arctic is melting, and, in many respects, you’re still a child. And the blob is free.

So far the number of humans-dissolved-alive remains at or near zero, but I expect this figure to skyrocket any day now, as the blob has been seen off the northern coast of Alaska.

The blob has been observed floating in dark, gooey looking mats on the surface of the ocean. The strands of goo are reported to be up to 12 miles long.

What you’re trying to convince yourself, I’m sure, is that this is no blob, but just another harmless oil spill. Wrong-o, says the local coastguard.

“It's certainly biological,” a coastguard petty officer reports. “It's definitely not an oil product of any kind. It has no characteristics of an oil, or a hazardous substance, for that matter.” The smell and composition, he says, suggest that it’s some natural substance, but it’s nothing that any of the locals remember seeing before. But they need only to return to their home theaters, and I’m sure they’ll recognize the substance in no time.

The substance is dark, hangs off the ice when they come in contact, and appears to be “hairy” when examined closely. “It kind of has an odor,” explained one of the locals on the goo expedition, “I can't describe it.” Well, I’ll describe the smell for you: fear.

Jellyfish have been seen tangled up in the blob, and one local turned in the remains of a dead goose, “just bones and feathers,” that had supposedly been found in the goo.

Samples of the blob were brought to Anchorage for analysis. Waste of time, if you ask me. The coastguard pilots that helped retrieve the sample are pretty certain it’s some kind of algae, but that’s what the military would say. It’s the blob.

Hide yourselves. Save your game frequently. Cherish what you remember of “normal life,” because it’s all about to change.

Here is a link to info about a huge stromatolite fossil:

Virginia Museum of Natural History scientists have confirmed that an approximately 500 million-year-old stromatolite was recently discovered at the Boxley Blue Ridge Quarry near Roanoke, Virginia. This specimen is the first-ever intact stromatolite head found in Virginia, and is one of the largest complete “heads” (of algae) in the world, at over 5 feet in diameter and weighing over 2 tons.

The oldest stromatolites have been dated at 3.46 billion years old.

A massive algae bloom is choking China’s Yellow Sea and threatening some Olympic events. Many Chinese cities dump untreated sewage into the Sea. Rich in nutrients, the sewage makes the algae grow like crazy. The problem goes beyond the inconvenience to boaters. The growing algae changes the near-shore habitat. And when all this algae dies, the bacteria that decays it sucks oxygen out of the water, killing fish and creating a dead zone.

And speaking of mud, scientists in Europe are experimenting with the genes of a light-sensitive algae, in hopes that they can be used to treat certain types of blindness.

Jun
28
2007

Pond scum to the rescue: Researchers are looking at ways to produce fuel from algae. Photo from NOAA.
Pond scum to the rescue: Researchers are looking at ways to produce fuel from algae. Photo from NOAA.

If some researchers in Colorado have their way, you may one day be driving a car powered by pond scum. Solix Biofuels is one of a handful of companies trying to produce biodiesel from algae.

May people consider biodeisel fuels, like ethanol, a preferable alternative to gasoline for powering. It is renewable (we’ll never run out; we just grow some more); it pollutes less; it is non-toxic and biodegradable; and we can grow it in the US, and not have to import oil from overseas.

One of the big problems with biofuels, though, is they are made from plants. Some of those plants, like corn and soybeans, we eat. Turning those plants into fuel is already driving up the price of food. And replacing all our oil with biofuel would require more farmland than exists in the entire nation.

This is where algae comes in. Algae produces vegetable oil, which can be refined into biodiesel. It can grow anywhere you can set up water tanks. It thrives on sunshine, which is plentiful and free. And it pulls carbon dioxide out of the air. (You could, in fact, take the CO2 produced by a traditional power plant and pump it straight into an algae farm)

Algae researchers are a long way from producing any biofuel yet. But this could be a way of meeting our energy needs while being gentler to the environment.