RAPD markers indicate the occurrence of structured populations in a migratory freshwater fish species
These findings suggest the occurrence of a structured population and have important implications for the conservation of the genetic variability of distinct natural P. marggravii stocks.

Sediments In Many Central Valley Streams Contain Toxic Levels Of Pyrethroid Pesticides
A family of pesticides used increasingly nationwide in place of more heavily restricted organophosphate pesticides has accumulated in many creek sediments to levels that are toxic to freshwater bottom dwellers, according to a study.

Natural Radioactivity Used To Determine Seasonal Changes In Groundwater Supply
The discharge of groundwater to coastal waters represents an important source of dissolved nutrients and contaminants that may affect chemical and biological processes in coastal ecosystems.

Water On The Gaza Strip: Time Bomb Or Ray Of Hope?
Beneath the ongoing conflict in the Gaza Strip is a groundwater crisis that's rapidly depriving Palestinians of drinkable water.

Scientists Conduct First Large-Scale Study Of Lake Superior
When the ice creaks, groans, and finally breaks up on Lake Superior next spring, a team of limnologists and oceanographers will launch a five-year study of a dramatic near-shore current in the lake.

Catastrophic Flooding From Ancient Lake May Have Triggered Cold Period
Imagine a lake three times the size of the present-day Lake Ontario breaking through a dam and flooding down the Hudson River Valley past New York City and into the North Atlantic.

Global Wetlands Surveyed From Space
Dotted across varied regions of our planet are the waterlogged landscapes known as wetlands.

New Fish Species Discovered In Midwestern River
A new species of fish discovered , not in the depths of the tropics, but in the "wilds" of western Tennessee.

Study Sheds Light on Mess in Polluted Streams
Downstream from mining sites, a suffocating gel forms in the water of creeks and rivers

How Much Excess Fresh Water Was Added to the North Atlantic in Recent Decades?
Continued Freshening of the North Atlantic Could Slow the Conveyor in the 21st Century

A treatment, not a cure: Calcium silicate neutralizes an acidic stream
As a result of fossil fuel emissions, many freshwater bodies in eastern North America have become acidified.

What We Know So Far... Nutrients, Ground Water, and the Chesapeake Bay - A Link with Pfiesteria?
Scientists suspect a link between high nutrient levels in water and the occurrence of algal blooms and the occurrence of Pfiesteria-like organisms.

Researchers Seek Answers To Combat World's Stressed Freshwater Supply
A multi-pronged analysis of global water resources indicates the supply of clean freshwater for use by humans and natural ecosystems is shrinking by the year...

Pollen Proves Beneficial For Northern Lakes
Mark Graham, a PhD student from the Department of Biological Sciences at the U of A, has shown for the first time the benefits of pollen on boreal lakes.

Africa's Lake Chad Shrinks By 20 Times Due To Irrigation Demands, Climate Change
NASA-funded researchers using computer models and climate data now understand why Africa's freshwater Lake Chad has been disappearing over the last 30 years.

Asia's Bear-sized Catfish Are Disappearing
One of the world's largest freshwater fish, an Asian catfish as big as a bear, may disappear in the near future, warns a UC Davis conservation biologist from his research base in Cambodia.

Study Links Parasites In Freshwater Runoff To Sea Otter Deaths
To understand the rise in sea otter deaths, scientists investigated potential sources of Toxoplasma contamination.

Differential effect of algal- and soil-derived dissolved organic matter on alpine lake bacterial community composition and activity
The effects of algal- and soil-derived dissolved organic matter (DOM) enrichments on the activity and community composition of bacterioplankton in an alpine lake were studied.

Role of dissolved organic matter in hypolimnetic mineralization of carbon and nitrogen in a large, monomictic lake
The hypothesis, which is the dissolved organic matter (DOM) is delivered to deep layers by convective mixing in winter, was studied.

Eutrophication and trophic state in rivers and streams
Many natural streams are net heterotrophic, so I propose that trophic state be divided into autotrophic and heterotrophic state.