Stories tagged Diversity of Organisms

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.”

Dec
09
2010

Surveying Microbes at Sea
Surveying Microbes at SeaCourtesy C-MORE
There are microbes…and then there are micro-microbes. Oceanographers on C-MORE’s BiG RAPA oceanographic expedition are finding bacteria the size of one-one-millionth of a meter in the oligotrophic (low nutrient), open-ocean of the Southeast Pacific, far from the productive waters off the coast of Chile. But that’s not all; some scientists are looking for the even smaller marine viruses in gallons of filtered seawater. Meet some of these micro-microbes in these video reports:
Prochlorococcus
ProchlorococcusCourtesy Dr. Anne Thompson, MIT

  • Microbe Diversity, Part 1: Prochlorococcus, the most common bacterium in the world’s oceans; nitrogen-fixing bacteria that provide a usable form of nitrogen “fertilizer” for other photosynthesizers
  • Microbe Diversity, Part 2: picophytoeukaryotes with different colored pigments; viruses, which are parasites on other living things

Yes indeed, microbial oceanographers are taking home quite a collection from the South Pacific Ocean. In less than a week the good ship RV Melville will arrive at Rapa Nui (Easter Island), and scientists will step onto land for the first time in almost a month. They and their oceanographic samples will return to C-MORE laboratories around the U.S. The oceanographers are also returning with new hypotheses buzzing around in their heads. Now it’s time for them to take the next step in the Scientific Method: data analysis!

Dec
02
2010

The shores of the alien world: Mono Lake, California, Earth.
The shores of the alien world: Mono Lake, California, Earth.Courtesy Eeek
Big news from NASA today, y'all.

NASA scientists are holding a conference at 2:00 EST today, and I hate to spoil the surprise, but word on the street is that they've discovered life on the planet Earth. Ah... but it's not what you think—word is that they've discovered life that's really different from everything else here.

Last year, I posted about the theory that this sort of thing might exist, but it wasn't until now that it has actually been discovered. Here's the gist: bacteria living in the mud of weirdo Mono Lake have been found to use arsenic as a building block of their bodies. That may not sound like much, but, if it's true, it would mean that these bacteria are different than every other living thing on this planet. Everything else that lives on this planet is made of carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur. These creatures use arsenic instead of phosphorous.

Aside from being super cool and different, the discovery suggests that if life can exist in ways we didn't think was possible, it can exist in places we didn't think life was possible. Like other planets and moons in our own solar system.

More details after the conference, hopefully.

Dec
01
2010

The University of Minnesota's Institute on the Environment has made some great movies examining what they call "big questions."

Big question: Feast or famine?
IonE's first Big Question asks: How do we feed a growing world without destroying the planet?

Big question: Is Earth past the tipping point?
Have we pushed our planet past the tipping point? That's a critical issue the IonE explores in our second Big Question video.

Big question: What is nature worth?
Plants, animals, even entire ecosystems are disappearing. So what? "What is Nature Worth" offers a three-minute look at what we’re REALLY losing – and what we can do about it.

Interesting problems, right? If you're intrigued, and want to know more about the folks posing the questions and trying to find the solutions, jump over to Future Earth.

Nov
29
2010

The Hawaiian monk seal, Monachus schauinslandi, is known to the Native Hawaiians as 'ilio-holo-i-ka-uaua', or "dog that runs in rough water".

Hawaiian Monk Seal
Hawaiian Monk SealCourtesy Karen Holman and James Watt

This endangered seal, along with the Hawaiian Hoary Bat, are the only mammals endemic to the Hawaiian Archipelago: they are found nowhere else in the world.

Seals can be injured or killed by becoming entangled in marine debris.

There are fewer than 1200 Hawaiian monk seals left in the wild. If you are lucky enough to see one on a beach or swimming, please keep your distance and do not disturb them: they are protected by both state and federal laws. 

Nov
17
2010

All Abooooooard!  Microbes Set Sail
All Abooooooard! Microbes Set SailCourtesy C-MORE
Well, yeah, that’s right. Microbes don’t smile, and they sure don’t command an oceanographic ship. However, there are lots of microbes in the sea; in fact, they account for most of the total marine biomass. With that in mind, there’s no question about microbes being fundamental to the functioning and health of the oceans.

UNOLS ship, the RV Melville
UNOLS ship, the RV MelvilleCourtesy Scripps Institution of Oceanography
Scientists from C-MORE (Center for Microbial Oceanography: Research and Education) and the Universidad de Concepción, Chile have organized an expedition to one of the most sparsely sampled oceanic regions on the planet…the southeast Pacific Ocean. The expedition’s official name is BiG RAPA (Biogeochemical Gradients: Role in Arranging Planktonic Assemblages). It departed from Chile on November 17 on the research ship Melville and will travel almost due west, ending at Rapa Nui (Easter Island) on December 14.

BiG RAPA expedition’s multi-media, interactive Sea It Live website
BiG RAPA expedition’s multi-media, interactive Sea It Live websiteCourtesy C-MORE
Oceanographers will conduct studies on a microbial community that exists in a very curious environment. The Melville will travel from the nutrient-rich coastal waters off Chile into the low-nutrient area known as the South Pacific Subtropical Gyre. The SPSG is the most oligotrophic, or nutrient-poor, of all sub-tropical gyres. What kind of microbes can live in such an impoverished area? How do they do it? Join the BiG RAPA’s Sea It Live Tracker and find out!

Nov
12
2010

Giant bison skull: behind it stands Dr. Steve Holen, curator of archaeology at the Denver Museum of Nature & Science
Giant bison skull: behind it stands Dr. Steve Holen, curator of archaeology at the Denver Museum of Nature & ScienceCourtesy Photo by Heather Rousseau ©Denver Museum of Nature and Science
I remember as a kid riding across North Dakota and marveling at the giant bison we passed on a hilltop near Jamestown. I don’t remember if we stopped to see it up close, but it is billed as the World’s Largest Buffalo, and according to records is 46 feet long and stands 26 feet tall at the shoulders. I do remember having a real sense of its massive size even from the highway. It was big.

Now, paleontologists from the Denver Museum of Nature & Science have announced the discovery of a prehistoric bison that could give the Jamestown sculpture a run for its money. When a horn core of the bison was first uncovered, paleontologist Ian Miller thought it was the tusk of a mammoth or mastodon. A second horn core, and the rest of the skull were soon located, and when all the pieces were put together, it made for a very large bison, one with horns that spanned more than 6 feet across! That makes the Ice Age giant twice as large as the American buffalo (Bison bison) seen today in places like Yellowstone National Park.

The gigantic skull was discovered near Snowmass Village in Colorado, in an excavation that has produced numerous fossils of prehistoric beasts that once roamed the area, including mammoths and a giant ground sloth. The age of the former lakebed deposits are thought to be between 12,000 and 15,000 years old.

SOURCES

American Archaeologist website story
Additional Snowmass excavation photos on Flickr
Days of Giants and Ice
Prehistoric human and bison relationships on the plains of North America

Nov
12
2010

a paver, or stone tile, representing ocean microbes
a paver, or stone tile, representing ocean microbesCourtesy B. Mayer
Who hasn’t heard about the very great scientific and social problems of global warming and ocean acidification? As microbiologist Louis Pasteur noted more than a century ago, “The very great is accomplished by the very small.” Part of the answer to these very great problems can be accomplished by understanding the very small: ocean microbes, living things that are less than a hundredth of the thickness of a human hair.

Our effort to understand the very small in the ocean has just taken a big step. C-MORE Hale (Hawaiian language for “house,” pronounced hah-lay) was officially dedicated in a ceremony that took place on October 25, 2010. C-MORE, or the Center for Microbial Oceanography: Research & Education, is all about studying ocean microbes. Scientists at C-MORE are looking into microorganisms at the genomic, DNA level and all the way up to the biome level where microbes recycle elements in ocean ecosystems.

Headquartered at the University of Hawai`i, C-MORE’s interdisciplinary team includes scientists, engineers and educators from the Massachusetts Institute of Technology, Monterey Bay Aquarium Research Institute, Oregon State University, University of California – Santa Cruz and Woods Hole Oceanographic Institution. As a National Science Foundation center, C-MORE is a dynamic “think tank” community of researchers, educators and students from a variety of cultural backgrounds, including native Hawaiian and other Pacific Islander.

C-MORE Hale, with stone tiles
C-MORE Hale, with stone tilesCourtesy B. Mayer
C-MORE Hale will be equipped completely and ready for scientists to put on their lab coats and get to work in January 2011. For now, e komo mai! (welcome!) Imagine yourself walking along this sidewalk leading to C-MORE Hale. Stop for a moment to look at the round pavers; they depict ocean microbes first discovered by 19th century zoologists on the worldwide HMS Challenger expedition. Step past these unique designs and take a tour of the brand-new building!

Nov
05
2010

Aiding and abetting science: Prison inmates have been enlisted to help forest ecologist Nalini Nadkarni in her research.
Aiding and abetting science: Prison inmates have been enlisted to help forest ecologist Nalini Nadkarni in her research.Courtesy Nalini Nadkarni
Since 2004, scientist Nalini Nadkarni has enlisted prisoners to aid in her scientific research.

Don’t worry, it’s not cruel and usual punishment. The inmates aren’t being used as guinea pigs to test new drugs or try out some new method of electroshock therapy. Instead, the incarcerated offenders are part of Nadkarni’s research team. Nadkarni holds a PhD in Forest Ecology and is on the faculty at Evergreen State College in Olympia, Washington. The National Science Foundation (NSF) has funded some of her inmate-aided research.

For one of Dr. Nadkarni'sDr. Nalini Nadkarni
Dr. Nalini NadkarniCourtesy Nalini Nadkarni
research projects, offenders at the Stafford Creek Corrections Center in Aberdeen, Washington, helped plant seeds of rare prairie plants then recorded data during the plants growth stages. The prisoners actually enjoyed helping out with the research. Not only did it give them a sense of doing something worthwhile, it connects them to something that’s sorely lacking in the old Graybar Hotel: nature.

For another project called Moss-in-Prisons (no Thor, your hero Randy has been picked up by the Tennessee Titans), Nadkarni recruited inmates at the Cedar Creek Corrections Center in Littlerock, Washington, to help discover improved ways of cultivating slow-growing mosses.

"I need help from people who have long periods of time available to observe and measure the growing mosses; access to extensive space to lay out flats of plants; and fresh minds to put forward innovative solutions," Nadkarni said.

If successful, the research could help replace ecologically important mosses that have been stripped from old-growth forests in the Pacific Northwest, a sometimes illegal tactic that seems to be a favorite among some horticulturists.

In many cases, helping with the research isn’t just a way for inmates to pass time behind the brick walls and barbed wire of their confinement. It’s also a way to inspire them. One former inmate, who had worked with Nadkarni, enrolled in a Ph.D. program in microbiology after his release from Cedar Creek, and went on to give a presentation of the research he had done there at the annual meeting of the Ecological Society of America.

Apparently, Dr. Nadkarni is on to something, and its importance is not lost on those still behind bars.

"It teaches me something," said one prisoner involved with Nadkarni’s prairie plant study. "It makes me work with people and it's just a new skill that I've learned."

Both science and prisoners benefit from this natural symbiosis taking place in such an unnatural setting. And other prisons have expressed interest in getting their inmates involved in Nadkarni’s research programs,

"Everyone can be a scientist,” Nadkarni says. “Everyone can relate to nature, everyone can contribute to the scientific enterprise, even those who are shut away from nature.”

SOURCES
NSF story and video
NSF press release

Nov
04
2010

You think you’re safe from the dangers of the wild just because you live in a city? This video will change your view. It was shot by a guy named Craig Kuberski, who lives within the city limits of St. Paul, MN. I know some of you were hoping you'd get to see a rogue cougar or bear mauling innocent urbanites or eating their pets, but that’s not the case here. It’s just a couple of bucks on the town and in a rut trying to catch some city girls' attention.

Rutting period is the mating season for many ruminants, (i.e. mammals like moose, caribou, bison, and deer). The rut is set-off by the shortening of daylight hours during autumn and in the case of white-tail deer (Odocoileus virginianus - which I’m pretty sure these are) can last for one to three months. During that time, male deer get all goofy and twitterpated, rubbing their antlers against trees, rolling in the dirt or mud, or battling each other – as seen in this video. Rutting season is the best time to hunt for them, and the easiest time to hit them with your car, although I don’t advise you do the latter.

As you may notice, Mr. Kubinski posted two buck fever videos on YouTube. I’ve only used the second here because it’s the better of the two, focus-wise, But if you’d also like to watch Part I, there you have it. KARE 11 also ran a story on it.