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Hot Water Can Prevent the Spread of Invasive Species
New research, published in Biological Invasions, has found that dunking that equipment after use in hot water for 15 minutes could help prevent the invaders from catching a lift. Researchers placed four species of nonnative plants—curly water thyme, New Zealand pigmyweed, floating pennywort, and parrot’s feather—and three species of nonnative animals—zebra mussels, killer shrimp, and bloody red mysid—in angling nets. They then tested the effectiveness of four treatments on mortality rates: hot water (about 45°C) only, hot water and drying, drying only, and a control group. Hot water baths, they found, were extremely effective in dealing with the unwanted species.
 
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Ground Water May Contain Decades Old Contamination - Nitrogen and phosphorus are the two plant nutrients in sewage and fertilizer that foul the bay, feeding its algae blooms and "dead zones." Both are washed off the land into streams whenever it rains, but nitrogen dissolves in water, so it also soaks down into the soil, ultimately reaching the water table.


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