The Great Lakes ecosystem has been severely damaged by more than 180 invasive and non-native species. Species such as the zebra mussel, quagga mussel, round goby, sea lamprey, and alewife reproduce and spread, ultimately degrading habitat, out-competing native species, and short-circuiting food webs.
rusader military victory, resulting in a three-year truce. Recognition of the territorial status quo at the end of active campaigning, including continued Muslim control of Jerusalem and the restoration of the Levantine Crusader States.
