Scientists say it's because some colonies adapted to the worsening conditions by moving south to find better ice or to more stable ice shelves or icebergs.

科学家们表示，这是因为有些企鹅群为了适应日益恶化的环境，向南迁徙寻找更好的冰层，或者迁徙到更稳定的冰架或冰山上。