北太平洋海鸟改变了它们的猎食偏好：进食鱿鱼增加，对鱼类摄食减少 (IMAGE)

American Association for the Advancement of Science (AAAS)

北太平洋海鸟改变了它们的猎食偏好：进食鱿鱼增加，对鱼类摄食减少

Caption

一幅根据对过去一个世纪生态系统变化趋势所做的分析资料图显示，北太平洋中部的海鸟品种在其食物链内的位置总体上在下滑，它们取食鱿鱼增加，对鱼类的摄食则有所减少。

Credit

Carla Schaffer / AAAS

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