New member Erica Gies (@egies) writes for Nautilus about what happens when human engineering weakens the connections between rivers and seas. Scientists are only now studying how dams change the oceanward flow of sediments, affecting nutrient distribution to ocean ecosystems, disrupting natural patterns of coastal land buildup, and altering currents. But these dynamics are still too complex for current climate models to predict, Gies writes, obscuring the full future impacts of these ongoing changes. Image: European Space Agency via Wikimedia Commons
