Patagonian Ice Sheet Ice Sheet resulted in a dramatic release of freshwater to the adjacent ocean, decreasing its salinity and altering its circulation, resulting in significant ecological changes both locally and remotely. Patagonian Ice Sheet The Patagonian Ice Sheet was a large elongated and narrow ice sheet centered in the southern Andes that existed during the Llanquihue glaciation. The ice sheet covered all of Chile south of Puerto Montt plus the western fringes of Argentine Patagonia. The ice sheet extended beyond the crest of the Andes into Argentina, but because of the dryness of the climate it did not reach beyond present-day lakes
Patagonian crested duck crested duck is not endangered. Although its global population is unknown, there are thought to be around 10,000 breeding pairs in the Falkland Islands. Its sibling subspecies, the Andean crested duck, is extremely rare even in captive collections. One of the main predators of the Patagonian crested duck is the black-crowned night heron. Adult ducks have few other predators though the younger ducklings are subject to predation by brown skuas. Patagonian crested duck The Patagonian crested duck ("Lophonetta specularioides specularioides"), also known as the southern crested duck, or the grey duck in the Falkland Islands, is the nominate of two