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To: | Birding-aus <> |
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Subject: | Post-Monica bird mortality information? |
From: | Andrew Taylor <> |
Date: | Sun, 30 Apr 2006 12:00:06 +1000 |
If you like back-of-the-envelope arithmetic, here is my estimate of the post-Monica bird mortality. Monica crossed the coast at Manangrida and has significantly weakened by the time it reached Jabiru roughly 300km away. Suppose the path is 50km wide thats 15000km^2 affected. I haven't seen relevant estimates of bird densities but some common eastern Australian bird species are estimated to have densities of the order of 1 per hectare. So suppose 20 birds/hectare in the Top end = 2000 birds/km^2 or 30,000,000 birds in the area affected by Monica. In the studies of Heron Island Silvereyes, cyclones look to knock the population back 10-30% . If you suppose 20% bird mortality from Monica that would be 6,000,000 birds dead. Andrew =============================== www.birding-aus.org birding-aus.blogspot.com To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line) to: =============================== |
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The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU