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3.
Figure 2

Figure 2. Estimated number of emperor penguin breeding pairs on Emperor Island.. From: First Recorded Loss of an Emperor Penguin Colony in the Recent Period of Antarctic Regional Warming: Implications for Other Colonies.

Black circles indicate counts made during winter and grey circles counts made later in the breeding season during spring, potentially after some egg/chick loss.

Philip N. Trathan, et al. PLoS One. 2011;6(2):e14738.
5.
Figure 5

Figure 5. The spatial pattern of trend in sea ice duration change over 1979–2004 .. From: First Recorded Loss of an Emperor Penguin Colony in the Recent Period of Antarctic Regional Warming: Implications for Other Colonies.

Scale shows trend in days per year. Black squares indicate the location of all known emperor penguin colonies . Colony reference numbers refer to .

Philip N. Trathan, et al. PLoS One. 2011;6(2):e14738.
6.
Figure 3

Figure 3. Variability in air temperature at Adelaide Island (May 1962 to December 1974) and at Rothera Point (April 1977 to April 2010).. From: First Recorded Loss of an Emperor Penguin Colony in the Recent Period of Antarctic Regional Warming: Implications for Other Colonies.

Thin black lines show the average monthly data; data from www.antarctica.ac.uk/met; red lines are the average annual (arithmetic average of all months) data; and blue lines average winter (arithmetic average of JJA) data. Analyses shows a significant trend in the average annual (dashed red line; F = 8.97; P<0.015) and average winter temperatures (dashed blue line; F = 5.84; P<0.035) at Adelaide Island and in the average annual temperatures (dashed red line; F = 10.13; P<0.005) at Rothera Point.

Philip N. Trathan, et al. PLoS One. 2011;6(2):e14738.

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