After analyzing the field data of the Antarctic Peninsula and the adjacent Scotia sea area, American researchers found that since the 1970s, the local temperature has increased by 5 to 6 degrees Celsius, and the increase of mammals from other sea areas has intensified the hunting competition of Antarctic mammals. Therefore, the density of euphausiid shrimp as the main food source of mammals in the above areas has decreased by 80%. During the same period, Adelie penguins and chinstrap penguins, which live in the area and feed on euphausiid shrimp, have also decreased sharply.
Which of the followings can be infered:
The rise of temperature has caused great damage to the ecological environment in Antarctica