1,413 results
1,413 results for: Algae
- Ecosystems
Pfiesteria’s Bite: Microbe may kill fish by skinning, not poisoning
At least one kind of Pfiesteria—accused of killing fish and threatening human health—does not produce a toxin but kills by eating holes in fish's skin, some researchers say.
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Probing Ocean Depths: Photosynthetic bacteria bare their DNA
Scientists have deciphered the DNA of two highly abundant, photosynthetic ocean bacteria.
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- Earth
Zooplankton diet of mercury varies
By modeling a lake ecosystem in large tubs of water, researchers have found that zooplankton—an important link in the food chain—consume much less toxic methylmercury when the lake experiences an algal bloom.
- Chemistry
Lakes reveal low phosphate concentrations
Researchers using a new technique have found that previous measurements of phosphate, an important nutrient in lake ecosystems, have grossly overestimated its concentration.
- Paleontology
Was it sudden death for the Permian period?
The massive extinctions that came at the end of the Permian period could have occurred within a mere 8,000 years, which suggests a catastrophic cause for the die-offs.
- Earth
The Making of a Grand Canyon
Carving this beloved hole in the ground may not have been such a long-term project.
- Earth
On Thinning Ice
Although some of Earth's glaciers seem to be holding their own in the face of global warming, most of them are on the decline, many of them significantly.
- Chemistry
Hydrogen: The Next Generation
Researchers are looking for more sustainable ways to generate hydrogen, which burns cleanly but is typically made from fossil fuel.
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Hey, we’re richer than we thought!
The latest inventory of life in the United States has turned up an extra 100,000 species of plants, animals, and fungi.
- Earth
Symbionts affect coral’s chemistry
The presence of symbiotic organisms in the tiny animals that build coral reefs changes the rates at which the animals take in minerals from the water, a finding that may affect the results of many research projects that have used chemical analyses of coral remains to infer past sea-surface temperatures.
- Earth
Finned Pollution Is One Cost of Our Exotic Tastes
Diners in most countries are accustomed to having an international array of foods in their pantries and eateries. It started more than a millennium ago when spice traders plied the caravan routes linking China to Istanbul. From Turkey, traders shipped their condiments throughout Europe and eventually to the New World. Northern or Chinese snakehead (Channa […]
