Ripley’s K-function (mean number of points within radius <i>r</i> from any point) for the observed point pattern (black), theoretical value under complete spatial randomness (blue), and value under an inhomogeneous Poisson process with no inter-point interaction (red).

<p>Confidence intervals generated through 1,000 simulations of point processes. Gentoo nests show over-dispersion (fewer points than expected) at short scales (inset) and under-dispersion (more points than expected) at larger scales.</p

Parameter estimates for the fitted hybrid Gibbs process model of gentoo nest locations at Port Lockroy, Antarctica.

<p>There is zero probability of points existing within 0.28m (h) of each other. From 0.28m to 0.5m (<i>r</i>₁) the probability of occurrence is reduced by , and from 0.5m - 1.86m (<i>r</i>₂) the probability of occurrence is increased by .</p

Raster and contour map derived from 3D model produced by Structure-from-Motion.

<p>Raster and contour map derived from 3D model produced by Structure-from-Motion.</p

Appendix B. Survivorship model comparison.

Survivorship model comparison

Colony abundance vs. guano stain area.

<p>(A) Colony abundance (and 95^th percentile confidence intervals; as reported by <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0113301#pone.0113301-Southwell1" target="_blank">[7]</a> as a function of the area identified as guano in the Landsat-7 survey (black circles  =  continental Antarctica, orange squares  =  Antarctic Peninsula), with best-fitting Poisson regression model (and associated 95^th percentile prediction envelop; gray-shaded envelop  =  continental Antarctica, orange-shaded envelop  =  Antarctic Peninsula). (B) Zoomed in portion shown as blue box in Panel A.</p

Probability of detection using Landsat-7 imagery.

<p>(A, B) The number of Adélie penguin colonies located (white) and missed (shaded) by the Landsat retrieval method for continental Antarctica (A) and the Antarctic Peninsula (B). The percent contribution of each bin to the total population is also illustrated. The horizontal axis is logarithmic, with boundaries equal to 10⁰, 10¹, 10^1.5, 10², 10^2.5, etc. (C, D) Probability of detection as a function of colony size (as reported by <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0113301#pone.0113301-Lynch1" target="_blank">[5]</a>) along the coast of continental Antarctica (C) and on the Antarctic Peninsula (D). Gray line represents best-fitting logistic model. Inset represents portion of the plot shaded in light gray.</p

Data Paper. Data Paper

<h2>File List</h2><div> <p><a href="Antarctic_Site_Inventory_census_data_1994_2012.csv">Antarctic_Site_Inventory_census_data_1994_2012.csv</a> (MD5: 00871bd47b6ec30cda68d1506120bfb3) </p> </div><h2>Description</h2><div> <p> This data set represents the accumulation of 19 years of seabird population abundance data collected by the Antarctic Site Inventory, an opportunistic vessel-based monitoring program surveying the Antarctic Peninsula and associated sub-Antarctic Islands. This data paper, which include 1124 records from 113 locations for seven species of seabirds (Adélie Penguin [<i>Pygoscelis adeliae</i>], Gentoo Penguin [<i>P. papua</i>], Chinstrap Penguin [<i>P. antarctica</i>], Macaroni Penguin [<i>Eudyptes chrysolophus</i>], Blue-eyed Shag [<i>Phalacrocorax atriceps</i>], Kelp Gull [<i>Larus dominicanus</i>], and Southern Giant Petrel [<i>Macronectes giganteus</i>]) includes data already published by the Antarctic Site Inventory as well as seven years of recent data not previous published. Census data represent a mix of nest and chick counts; each census record includes the location, date, and precision of the census count, along with any auxiliary notes. Included with the database are maps to clarify the location of specific breeding populations that may be new (and thus not previous reported) or ambiguous. This compilation represents the best single source of raw data on the spatiotemporal dynamics of the <i>Pygoscelis</i> penguins in the Antarctic Peninsula region, and provides population data on several flying bird species less frequently studied. </p> <p> <i>Key words</i>: <i>Adélie penguin; Antarctic Peninsula; Blue-eyed Shag; breeding bird survey; Chinstrap Penguin; Gentoo Penguin; Macaroni Penguin; </i>Pygoscelis;<i> Southern Giant Petrel; vessel-based monitoring.</i> </p> </div