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The leopard seal as a barometer of climate warming Presentation by Tracey Rogers With support from: www.tallpoppies.net.au The tall poppy is a metaphor.

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Presentation on theme: "The leopard seal as a barometer of climate warming Presentation by Tracey Rogers With support from: www.tallpoppies.net.au The tall poppy is a metaphor."— Presentation transcript:

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2 The leopard seal as a barometer of climate warming Presentation by Tracey Rogers With support from: www.tallpoppies.net.au The tall poppy is a metaphor for excellence and symbolises Australia’s pride in its outstanding achievers – in all fields.

3 AMMRC 2007 AMMRC Director Australian Marine Mammal Research Centre (University of NSW/ ZPB) 22 programs Evolution & Ecology Research Centre UNSW

4 Western Antarctic Peninsula

5 Glacial retreat

6 Calving ice-bergs Image from Canadian Space Agency & Centre for Remote Sensing

7 Krill decline Atkinson et al. (2004) Nature 432: 100-103

8 Penguin colony declines Fraser & Hofmann (2003) Mar.Ecol.Prog.Ser. 265: 1-15

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11 AMMRC Australia Dr T. Rogers Australia AMMRC Top-order predators UK Chile Ms I. Hebel Mosses & lichens Germany ClicOPEN Germany Prof D. Abele Climate Change Western Antarctic Peninsula Brazil Netherlands USA Dr I. Overeem Sediment analysis Belgium Dr C. De Broyer Data management Netherlands France UK Poland Germany Brazil Mexico South Africa Germany Chile DRAKE BIOSEAS Argentina Dr V. Andrea biodiversity & human impacts CAML Australia Prof M. Stoddart Census of Antarctic Marine Life Brazil Ukraine Italy India UK New Zealand RussiaPoland USA France Norway Canada USA Argentina Dr G. Ferreyra Plankton UK Australia Italy Prof. G. di Prisco Evolution & biodiversity in the Antarctic Germany Netherlands Spain Prof A. Eraso Spain Glacier networks Norway Korea Italy France Uruguay Impacts of climate change

12 Top of the food chain

13 Influence on habitat needs

14 Are the seals drifting with the ice?

15 Acoustic surveys

16 Detection Threshold Distance (r) Source Level (SL) Transmission Loss (TL) Background noise (NL) Predict survey area

17 Remote sensing data Acoustic survey ACC Bathymetry Ice data

18 Morphometrics

19 WAP leopard seals

20 Changes in Prey?

21 Changes in Diet

22  13 C Prey Location  15 N Prey Trophic Position

23 Changes over the Past Century

24 Today 784 species extinct 65 are only in captivity 16,119 threatened 2006 IUCN Red List Threatened Species

25 Thomas et al. 2004 Nature 427 145-148 18-35% species committed to extinction Tomorrow

26 Why do I care?

27 What inspired me

28 My plan

29 Juggling life/work balance?

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31 Thank You

32 ammrc.org.au


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