Author: Lori Jia

Scientists Start a Genomic Catalog of Earth’s Abundant Microbes

Posted on by Lori Jia

The New York Times, December 28, 2009

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If you want to appreciate the diversity of life on earth, you will need a microscope.

There are about 5,400 species of mammals on the planet, but just a spoonful of soil may contain twice as many species of microbes. They can dwell in habitats where so-called higher life forms like us would quickly die, including acid-drenched mines and Antarctic deserts. By one rough estimate, there may be, all told, 150 million species of microbes.

“Microbes represent the vast majority of organisms on earth,” said Hans-Peter Klenk, a microbiologist for the German Collection of Micro-organisms and Cell Cultures, a government microbiology research center.

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#97: Tropical Heat Speeds Up Evolution

Posted on by Lori Jia

Discover, December 16, 2009

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If alien biologists were on an expedition to Earth, it would not take long for them to realize that there are a lot more species in the tropics than there are in temperate regions. “It’s the biggest, most obvious pattern in nature,” says Len Gillman, an evolutionary ecologist at Auckland University of Technology in New Zealand. Why that pattern exists has been a long-standing puzzle. This year, however, Gillman found a possible answer: A warm climate makes life evolve more quickly.

Gillman and his colleagues compared 130 closely related pairs of mammal species. In each case, one species lived at a higher latitude or elevation than the other.

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The First, and Greatest, Reality Show: Evolutionary Biology

Posted on by Lori Jia

Discover, November 23, 2009

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Anne Gaskett, a Cornell University biol­ogist, spends her days crouching quietly next to orchids in Australia. It may seem like an uneventful way to pass the time, but she is actually observing a marvelous act of sexual deception. The flowers are fooling wasps into making love to them.

Male wasps normally seek out females by sniffing for their pheromones, signaling chemicals that they produce. Each species makes a unique pheromone, which means that male wasps rarely end up with the wrong females.

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Scientists Find A Microbe Haven At Ocean’s Surface

Posted on by Lori Jia

The New York Times, July 27, 2009

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The world’s oceans are like an alien world. The National Oceanic and Atmospheric Administration estimates that 95 percent of them remain unexplored. But the mysteries do not start a mile below the surface of the sea. They start with the surface itself.

Scientists are now discovering that the top five-hundredth-inch of the ocean is somewhat like a sheet of jelly. And this odd habitat, thinner than a human hair, is home to an unusual menagerie of microbes. “It’s really a distinct ecosystem of its own,” said Oliver Wurl, of Canada’s Institute of Ocean Sciences.

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Ice, Ice Baby: When Fact-Checking Is Not Fact-Checking

Posted on by Lori Jia

For the past couple weeks, I’ve been blogging about the problems newspaper opinion pages have with science. The example I’ve focused on is two columns on global warming by George Will in the Washington Post (and syndicated to 300 newspapers). Will claims that scientists who point to evidence that global warming is having an effect on the planet and reporters who describe their research are all hysterical doomsayers. To make his point, Will offers a range of evidence, from accounts in the 1970s about global cooling to statistics about the area of global ice cover recorded by satellites.

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