Sentences with phrase «large algal blooms»

And excess nitrogen fertilizer applied to the fields of feed corn grown to satisfy the world's livestock runs off into streams and rivers, sometimes flowing to coastal waters where it creates large algal blooms and low - oxygen «dead zones» where fish can not survive.

Some of the pale blue in Lake Erie may be sediment, but the green is an extremely large algal bloom.

Not exact matches

Too much nitrogen in water can lead to algal blooms, which reduce oxygen in water and kill large numbers of fish.

Excess amounts from human activities often end up in rivers, streams and coastal environments, causing algal blooms, loss of sea grass and low oxygen levels in the water, which can kill large numbers of fish and other organisms.

James Castle and John Rodgers of Clemson University think that such algal blooms — triggered by warming water or an increase in nutrients — might be behind the five largest mass extinctions in Earth's history.

Large - scale experiments where scientists spray iron into the waters, literally fertilizing phytoplankton, have created huge human - made algal blooms.

Many large, eutrophic lakes such as Lake Erie are plagued each year by algal blooms so massive that they are visible from outer space.

These nutrients end up in rivers and streams as the result of human activities and can cause algal blooms, loss of seagrass and low oxygen levels, which can lead to large numbers of fish and other organisms dying.

«So fish boldness may play an important role in large - scale algal blooms that result from nutrient pollution and threaten coral reefs worldwide.»

During that period, tons of excess nitrogen and phosphorus entered the Mississippi River Basin and drained into the Gulf of Mexico, where the large influx of nutrients has triggered huge algal blooms.