近放了食物网,南极企鹅的饮食的作文和封口罐头的顶是地区性的食物网并且这样的优秀指示物海洋的生态系统的地位。现代企鹅和封口的饮食的作文很好被调查了;然而,企鹅和封口食谱上的数据的一个长期的时间系列是稀罕的。在南极洲的如此的数据,特别早于鱼的人的收获,为理解是关键的并且预言到自然气候的地区性的海洋的食物网的回答的开始的任何东西,鲸鱼和封口变化。这里,我们在南极企鹅和封口在 paleodietary 变化的研究上考察最近的进步,明确地广告汢? 楳業慬? 潴洠摯牥 ? 敶敧慴楴湯吗?
Positioned near the top of the food web, the dietary composition of Antarctic penguins and seals can be an excellent indicator of the regional food web and thus the status of the marine ecosystem. The dietary composition of modern penguins and seals has been well investigated; a long-term time series of data on penguin and seal diets, however, are rare. Such data, especially any predating the initiation of human harvesting of fish, whales and seals in Antarctica, are crucial for understanding and predicting responses of regional marine food webs to natural climate changes. Here we review recent progress on research of paleodietary change in Antarctic penguins and seals, specifically the Adelie penguin (Pygoscelis adeliae) and Antarctic fur seal (Arctocephalus gazella). These studies indicate that the dietary changes of penguins correspond quite well with fluctuations in climate and sea ice extent during the Holocene. The depleted δ15N ratios found in modern Adelie penguins support the "krill surplus hypothesis" in relation to historic human depletion of krilleating fish, seals and whales.