The species richness and cell abundance of Chaetoceros were characterized by a typical seasonal pattern.

角毛藻的种类丰富度和细胞丰度具有典型的季节性特征。

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The abundance of vertebrate species fell by a third between 1970 and 2006.

在1970年到2006年之间，本来丰富的脊椎动物物种减少了三分之一。

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In pursuing this abundance of unknown species, researchers may find that whales are an excellent, if unexpected, place to start.

在关注如此多的未知物种的同时，研究人员出乎意料地发现从鲸入手或许是个不错的选择。

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He suggested that females may perceive the song as abnormal if they could not hear the lower frequencies and, over a period of time, this could have a potential impact on the abundance of the species as if adults were not pairing and mating then the number of offspring would decrease as a result.

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The WCBS, which began in 2009, complements other national butterfly surveys - such as the UK Butterfly Monitoring Scheme - and aims to "more effectively monitor the changing abundance of widespread butterfly species across the general countryside".

BBC: Science & Environment

What is more, the extent of sea ice cover influences the abundance of krill and the fish species that eat them - both food sources for the penguins.

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