I'm very curious how the total observed sea level rise of 19cm over the past 100 years has had any measurable effect on cross-continent species transfer by rafting.
I don't mean to belittle the current, or projected sea level rise, but merely point out that it's unhelpful to the climate debate to falsely attribute problems to climate change.
Put another way if the ocean was 7 inches lower then fewer homes would have been destroyed by the tsunami and less junk would have made the trip. Sea level rise stacks with other events so there is more small events and bigger events get magnified.
However, the small islands in the middle of the ocean are awash with all sorts of interesting life, commonly having landed there in some violent event. The warm climate actually is very good for growing vegetation, so herbivores can proliferate if they make it on-land.
The BBC documentary South Pacific covers this v well, definitely recommend watching.
http://knts.tsniimash.ru/ru/site/Experiment_q.aspx?idE=191 (in Russian, but Google Translate seems to work well on this one)
It's not finished yet but apparently preliminary results  show that microorganisms can be lifted into the upper atmosphere from the oceans somehow.
I know this is the wrong answer, but my hungry mouth welcomes every one of these creatures to their new home.