150,000 Adelie penguins of Cape Denison died since 2011 (1 Viewer)

because they became trapped by an iceberg in 2010 and forced to walk 60km to the sea, penguins number in the colony decreased from 160,000 to 10,000 so far.
http://www.theguardian.com/world/20...after-giant-iceberg-renders-colony-landlocked

This is not a conservation issue, the iceberg is natural, its movement is natural, the effect on the penguins is natural. If this was the only Adelie Penguin colony in the world (which it isn't) then this would be an example of how extinction happens naturally.

John

This might be be conservation issue, because the iceberg could break away from the main land or get so close to penguins due to climate change. Moreover dying off of so large number of penguins is probably an unusual event, what makes it very suspicious independently of cause. And even it were not suspicious, it would be still conservation issue because such change of penguins numbers can affect population of other animals and plants.

And this is conservation issue also because we think if it is conservation issue or it is not conservation issue. So in this situation, even it were not conservation issue, it is conservation issue. Because we take such a possibility into account, or exclude it

Obviously it would be very perverse influence of global warming, because penguins were killed not by warming but by cold ice (they like in addition).

The effect of global warming on icebergs:
http://education.seattlepi.com/effect-global-warming-icebergs-4877.html
(global warming increases their numbers)

Where exactly this particular iceberg came from ? Because it was part of such "main ice" somewhere.

Edited later:
This iceberg is designated B09B. It was grounded near the Mertz Glacier before.
http://www.antarctica.gov.au/magazi...ertz-glacier-tongue-unhinged-by-giant-iceberg
http://www.antarctica.gov.au/news/2010/gigantic-iceberg-altering-natural-processes
http://www.antarctica.gov.au/__data/assets/image/0008/37718/varieties/antarctic.jpg
https://www.youtube.com/watch?v=b5hI3oKdDqM

A little earlier, C28 iceberg was calved from the Mertz Glacier. This event was caused by collision with our B09B iceberg (in 2010). B09B became grounded and later started to move again.
B09B calved from the Ross Ice Shelf in 1987 and this is it's real origin.
This everything looks a little like sort of domino effect or even chain reaction.