Answer :
Final answer:
The decline in bee populations, linked to colony collapse disorder, is largely attributed to threats like the invasive varroa mite, Nosema gut parasite, and acute paralysis virus. This significant loss of such crucial pollinators threatens the successful growth of many crops that require pollination.
Explanation:
The decline in honey bee populations, a phenomenon often associated with a syndrome known as colony collapse disorder, is largely attributed to certain parasites and viruses. Particularly, the invasive varroa mite poses a significant threat to these vital pollinators. This mite, along with the Nosema gut parasite and acute paralysis virus, is believed to be a major contributor to the loss of honey bees. The loss of these pollinators puts at risk a number of important US crops requiring pollination, including grapes, oranges, lemons, peppers, brassicas like broccoli and cauliflower, as well as many berries, melons, and nuts. While other pollinators exist in nature, the sheer volume and effectiveness of the honey bee make its decline a serious concern for agriculture.
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