Researchers from the University of Alaska Southeast are studying how rivers and aquatic habitat are affected by the thinning and receding glaciers in Southeast Alaska. Glacial flour, rock that is ground up by the sliding glaciers, affects water clarity by limiting sunlight penetration and thereby regulating biological activity. Glacial fed rivers such as the Mendenhall River supply consistently cold and abundant water throughout the summer, which is also important for salmon habitat. Non-glacial fed rivers can experience warmer water and reduced flows during the summer which can be limiting to the salmon life cycle.
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