Map of study location in Norway and the 15 islands in the river Glomma. Black dots represent trap locations on the islands and on the mainland.

<p>Map of study location in Norway and the 15 islands in the river Glomma. Black dots represent trap locations on the islands and on the mainland.</p

Probability of extinction.

<p>The relationship between the probability of extinction (ε), population density index on the island the previous season (POPISL) and maximum water lever (WMAX; 255 m = solid line, 256 m = broken line, 257 m = dotted line).</p

Probability of colonisation.

<p>The relationship between the probability of colonisation (γ), population density index on the mainland the previous season (POPML) and proportion of food and cover on the ground (PFOOD; 5% = solid line, 33% = broken line and 55% = dotted line).</p

Estimates ± SE on the logit scale for the covariates used to model the occupancy dynamics (ψ₀, γ, ε, <i>p</i>) of the root vole metapopulation.

<p>NOTE: Estimates from univariate models used to identify covariates for the multivariate analyses and from the best multivariate model are shown. Provided is also the sign of the a priori predicted effects. All covariates in the best model had at strong impact, i.e. 95% CI (<i>β</i> ±1.96xSE) do not overlap 0; * denotes covariates with strong univariate impact and thus included in the multivariate models; PERIM = perimeter; DISTML = distance to mainland; DISTS = distance to nearest source population; PFOOD = proportion of food and cover; WMAX = maximum water level; WMIN = minimum water level; POPML = population density index for the mainland the previous season; POPISL = population density index for the island the previous season; WEEK = week of the year; WEEK∧2 = week of the year on a quadratic form.</p

Time schedule of the study and trapping results.

<p>Time schedule of the study and trapping results.</p

Probability of detection.

<p>The relationship between the probability of detection (<i>p</i>), week of the year (WEEK∧2) and island perimeter (PERIM; 40 m = solid line, 358 m = broken line, 800 m = dotted line).</p

Appendix A. A table of biological species traits and affinity scores.

A table of biological species traits and affinity scores

Appendix B. A table of ecological species traits.

A table of ecological species traits

camera trap data

A dataset of collected by nine below-snow camera traps. See metadata file for detailed description

Generalised Additive Mixed Models exploring the variations in diving parameters.

<p>Generalised Additive Models which best fitted (estimated using Δ BIC) daily temperature at the bottom of the dive (Tmax), salinity at the bottom of a dive (Smax), maximum dive depth and dive duration as a function of the date and averaged weekly northerly (North) or north-easterly (NorthEast) winds the precedent week for 30 adult and juvenile harbour seals equipped with Conductivity-Temperature-Depth Satellite-Relay-Data-Loggers (CTD-SRDLs) in Svalbard, Norway during 2009/2010 and 2010/2011. Top-ranked models are in bold.</p><p>Generalised Additive Mixed Models exploring the variations in diving parameters.</p