I think there are some microorganisms in the snowpack, but other than that it's a pretty barren place, at least above the water. Below, a lot of sea life congregates around the ice front - there are nutrients that melt out of the ice - and this supports an ecosystem, but that should all just move to the new ice front. The iceberg itself will probably support a small marine ecosystem as it floats away and melts.
I'm not an ecologist though, so I'm hazy on the details.
I'm not an ecologist though, so I'm hazy on the details.