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Bigger May Not Be Better When It Comes to Mississippi River Diversions

New research shows how river diversions may change water quality in estuaries.

River diversions are a common coastal wetland restoration tool, but recent research, conducted by U.S. Geological Survey in collaboration with researchers in Louisiana State University’s Department of Civil and Environmental Engineering and the LSU AgCenter, has shown that large-scale Mississippi River diversions may significantly change water quality in estuaries, affecting economically important shellfish and fish species. (more…)

Ancient shark teeth give clues to future of Arctic climate change

By Guest PostJuly 29, 2014Sciencearctic waters, crocodiles, deltaic estuary, eocene epoch, ernst seidl, future, global warming, greenhouse effect, hoehlen, hongqing wang, isotopes, jaelyn eberle, knochenfloete, mississippi river diversions, oxygen atom, rebuilding wetlands, schwaebischen alb, subatomic variations, testosterone therapy, testosterone treatment, thomas gill, ttrials, university of chicago, zekirija sejdini

A new study of sharks that lived in warm Arctic waters millions of years ago suggests that some shark species could handle the falling Arctic salinity that may come with rising temperatures.

The Arctic today is best known for its tundra and polar bear population, but roughly 38 to 53 million years ago during the Eocene epoch, the Arctic was like a huge temperate forest with brackish water, home to a variety of animal life, including ancestors of tapirs, hippo-like creatures, crocodiles and giant tortoises. Much of what is known about the region during this period comes from well-documented terrestrial deposits. Marine records have been harder to come by. (more…)

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Bigger May Not Be Better When It Comes to Mississippi River Diversions

Ancient shark teeth give clues to future of Arctic climate change