这是我的一个presentation的讲稿 for community ecology 不知道适不适合你，是以一个文章为背景的 the bees are back in town (The Economist on March 7th 2009)
At the end of February, the almond flowers were competing for the pollinators in the orchards of California’s central valley. The flowers are so delicate to attract the pollinators which are mainly honeybees, because of the shortage of honeybees in California. The shortage of the honeybees called colony collapse disorder. The colony collapse disorder is described as a phenomenon that large numbers of honeybees are dead in the winter. The causes of colony collapse disorder are unclear. There are some possible causes of the colony collapse disorder, such as virus, parasites and fungus. A study from Cox-foster et. al. showing that the Israeli acute paralysis virus is closely corresponding to the colony collapse disorder by molecular analysis of pathogen DNA like 16s DNA which are highly conserved. For instance, DNA sequencing and NCBI blast were used to identify the species of pathogen on the honeybees. Beside the Israeli acute paralysis virus, parasitic mites can also lead to the colony collapse disorder. But further study is showing that the origin of the colony collapse disorder is the poor food nutrients.
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