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Tag: "runoff" at biology news

Past droughts geographically widespread in the West, according to tree-ring data

... from this study, the conventional wisdom was that runoff from the Colorado River would be available to make...nting this past winter when 2,017,580 acre-feet of runoff ?the first above-normal runoff season since 1998 -- filled the reservoirs on the Salt and Verde rive...

Study shows eutrophic lakes may not recover for a millennium

...steady decline in water quality due to accelerated runoff and the resulting eutrophication. But the lake is similar in most respects to lakes anywhere in the world, Carpenter says, and the results of the new study are generally applicable to lakes anywhere. "The global pattern is the same," he says. "We a...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...community that flourishes in the iron sulfide-rich runoff of the Richmond Mine near Redding. A pH level of 7 is considered neutral and most proteins prefer pH levels between 5 and 7. The water trickling from the mine has a pH of about 0.8 and a temperature of 107 degrees Fahrenheit. "This microbial communi...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

...ters thick, sits atop green, 108 degree Fahrenheit runoff containing zinc, iron, copper and arsenic. "This system is a very tightly coupled biogeochemical system, and we are just trying to find out how it works," she said. "This microbial community is thriving at the extreme edge," added co-author Bob Het...

Man-made wetland's effectiveness similar to natural marsh

...this wetland acted as an effective sink, even when runoff from fertilized fields was especially high," Mitsc...." Most of the water entering the wetland came as runoff from farm fields, and nitrate and phosphorus levels all peaked after fertilizer application in the s...

Road salt affects mitigation wetlands

...sure the amounts of salt that enter the designated runoff wetland and one other that is slightly affected by...ggers record salinity hourly. "Salt levels in the runoff wetland reach peaks that are half as salty as sea water," Silver told attendees at the North America...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

Researchers have long suspected that fertilizer runoff from big farms can trigger sudden explosions of ma...the ocean are much more vulnerable to agricultural runoff than was previously assumed. The study is based on satellite imagery of Mexico's Gulf of California...

Dead zone area in Gulf could be increasing, researchers say

...o accounts for almost 90 percent of the freshwater runoff into the Gulf of Mexico. "We saw no hypoxia in this area until June of last year, and this year we found in late March," DiMarco says. "If the physical conditions we noticed continue, it could mean an unusually strong hypoxic zone this year, and th...

Scientists discover unique microbe in California's largest lake

...d States.Because it also receives the agricultural runoff of the Imperial Valleyand municipal runoff from Mexicali, Mexico, considerable attention hasfocused on the fate of the now highly polluted wate...

Essential mangrove forest threatened by cryptic ecological degradation

... assemblages in southern Sri Lanka, changing water runoff patterns, and archival material from the Dutch East-India company, the researchers show that over the past few decades contemporary irrigation projects have abused the long-standing Sri Lankan tradition of freshwater management that once sustained ro...

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