The historical records of Antarctic penguin and seal population changes, which had been reconstructed from the sediments influenced by animal excrements, showed that historically the penguin and seal population had experienced dramatic fluctuations.
另外,南极海豹毛和生物粪土层中还保存了过去几千年人类文明的历史信息,汞(Hg)含量的波动与人类冶金文明的盛衰存在明显的响应关系。