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This decrease has led to reduced numbers of krill, the main source of food for some penguins2, as well as for many of the fish species that penguins feed on. But it is not just climate change and melting ice that is putting penguins at risk. Other human activities are having serious impacts on penguin1 habitats and their food supplies. These include over fishing, guano mining, and rampant3 coastal4 development. In addition, oil pollution from drilling and shipping5 industries has impacted penguin populations throughout the southern hemisphere. Canaries were used as sentinels in coal mines because they were more sensitive to toxic6 gases than humans. Their deaths warned miners to get out before it was too late. Similarly, penguin populations respond rapidly to changes in the marine7 environment, and serve as a warning that we are doing a poor job of managing our oceans, which could lead to potentially catastrophic consequences.
1 penguin | |
n.企鹅 | |
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2 penguins | |
n.企鹅( penguin的名词复数 ) | |
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3 rampant | |
adj.(植物)蔓生的;狂暴的,无约束的 | |
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4 coastal | |
adj.海岸的,沿海的,沿岸的 | |
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5 shipping | |
n.船运(发货,运输,乘船) | |
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6 toxic | |
adj.有毒的,因中毒引起的 | |
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7 marine | |
adj.海的;海生的;航海的;海事的;n.水兵 | |
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