FRISCO — Nutrient pollution from farming has seeped into nearly every corner of a California estuary, affecting the abundance of fish in the important marine nursery, according to new research by scientists with the University of California at Santa Cruz and The Nature Conservancy.
Lead author Brent Hughes began studying water quality in Elkhorn Slough as a UCSC graduate student. His earlier research showed that virtually every portion of the estuary is adversely affected by high nutrient levels. The pollution stimulates the growth of algae, leading to low oxygen levels when the algae die and decompose.
Excess nitrogen and phosphorus speed breakdown of forest litter
FRISCO — Along with causing unwanted and potentially toxic blooms of algae, nutrient pollution also causes a significant loss of forest-derived carbon in stream ecosystems — to the detriment of aquatic life, according to a research team led by University of Georgia scientists.
‘We’re drawing direct lines from human nutrient inputs to the reef ecosystem, and how it affects wildlife’
FRISCO — What goes on your lawn and garden doesn’t stay there — and that’s bad news for sea turtles in Hawaii, Duke University biologists said this week, explaining that pollution from urban areas and farms is causing often-deadly tumors in the endangered animals.
‘We’re desperately trying to save what’s left, and cleaning up the water may be one mechanism that has the most promise …’
By Summit Voice
FRISCO — By setting up a long-term, controlled exposure experiment in Florida, researchers were able to pin down the impact of nutrient overloads and separate them from other possible causes of coral reef decline.
The three-year study, confirmed what scientists have long suspected — pollution from sewage, agricultural runoff and other land-based sources can lead to coral disease and bleaching.
Proposed rule still subject to hearings and final EPA approval
By Bob Berwyn
SUMMIT COUNTY — Twenty years after the Clean Water Act was amended to address organic pollutants like nitrogen and phosphorus, Colorado is moving to limit the discharge of those nutrients, which lead to vexing water quality issues in lakes and streams.
“Phosphorus and nitrogen are incredibly prevalent. They’re in animal waste, human waste, fertilizer, and we’ve ignored it for 20 years,” said Becky Long, water caucus coordinator for the Colorado Environmental Coalition.
If left unaddressed the pollution causes algae blooms and dead zones in waterways, impacting aquatic wildlife and Colorado’s outdoor recreation opportunities.
Long said she’s encouraged by the Colorado Water Quality Control Commission’s early support for the new standards limiting nitrogen and phosphorus pollution. The rule is still subject to challenge at subsequent hearings, as well EPA review and final approval.