streambeds

Healthy rivers needed to remove nitrogen

...ntered the river if that ecosystem was healthy. Tiny organisms such as algae, fungi and bacteria that may live on rocks, pieces of wood, leaves or streambeds can take up, or absorb about half of the nitrogen on average that humans currently put into the sampled river sites, according to Sherri Johnson, a ...

Habitat microstructure drives salamander metamorphosis

...etamorphoses into a more terrestrial adult form in streambeds composed of fine, tightly packed gravel but retains its juvenile, or paedomorphic, form in streambeds made of large, loosely packed particles. This stud...ts show that paedomorphic salamanders prevailed in streambeds made of large well-sorted gravel, whereas metamorp...

New class of antibiotics effective against drug-resistant bacteria discovered in fungi

... and aquifer sediments, a surprising finding from water samples from streams receiving runoff is that low concentrations of arsenic are transported to streambeds instead of being retained by the aquifers, Schreiber said. "We think that the arsenic is adsorbed onto nanoscale particles that pass though our filter...

Geoscientists follow arsenic from chicken feed to streambeds

... and aquifer sediments, a surprising finding from water samples from streams receiving runoff is that low concentrations of arsenic are transported to streambeds instead of being retained by the aquifers, Schreiber said. "We think that the arsenic is adsorbed onto nanoscale particles that pass though our filter...

Freeze-dried mats of microbes awaken in Antarctic streambed

...to frozen lakes on the valley floor, she said. The streambeds contain photosynthetic microbes known as cyanobact...nnel had higher growth rates than mats in adjacent streambeds receiving annual summer water flow, she said. The ...f a cooling trend in the McMurdo Dry Valleys, some streambeds that normally have annual summer flows have been d...