Normally, Search Engines cannot use such data directly because they don't have access to it! How would google know what bounce rate your have on your website?
Many marketers say that usage data like bounce rates, number of visists... will influence rankings in some way, but there is still no evidence for that.
Plus, an 80% bounce rate cannot always be a bad thing, imagine a user looking for an info, he finds your website, reads the page that answers his or her question, you have a 100% bounce rate but the user is satisfied, what's wrong with that?
A good way to reduce bounce rates on a website is to:
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link to related content
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have an easy to navigate website
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engage the user by letting him comment
...
Hope that helps!