Ocean bug has 'smallest genome'

I found this BBC article really quite interesting:

"Ocean bug has 'smallest genome'
[...]
"Pelagibacter has just 1,354 [genes], US biologists report in the journal Science.
What is more, Pelagibacter has none of the genetic clutter that most genomes have accumulated over time.
There are no duplicate gene copies, no viral genes, and no junk DNA."

I know that there are different views around the junk DNA, but to not have any, how could this come about ?
Does this suggest a very tight, clean evolutionary route I wonder, and if so, what does that suggest about the link between the organism and the environment that it develops in.

This beast sounds far more interesting the more you read -

"Pelagibacter has even gone one step further. It has chosen where possible to use genetic letters - or base pairs - which use less nitrogen in their construction: nitrogen is a difficult nutrient for living things to obtain.
The result is one of the most successful organisms on the planet."

Plants generally rely on [mostly] bacteria to deal with their nitrogen, and animals on the plants - it's not something that they can normally on their own, so even this too appears to be linked to streamlined genes, or maybe the cause of them ?

[Edit to fix link. Thanks to Spacedoubt & Sardion2000 for the heads up]

[edit on 19-8-2005 by 0951]

Something is wrong with the link my friend..
Could you check it out?

I'd love to read the article...

Thanks,

Space

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