Figure legends
Figure 1. (a) Map depicting the known Balearic shearwater
breeding colonies in the Balearic Islands. Circle size is proportional
to population size as shown in the legend. Modified from Arcos (2011)
(b) Snail plot (Challis et al. 2020) summarizing genome assembly
statistics. From inside to outside, the light-grey spiral shows the
cumulative scaffold count on a log scale with white scale lines
depicting changes of order of magnitude. Dark-grey segments show the
distribution of scaffold lengths, and the plot radius is scaled to the
longest scaffold (shown in red). Orange and light-orange rings represent
the N50 and N90 scaffold lengths, respectively. Blue and light-blue
rings show GC, AT and N percentages along the genome assembly. (c) MSMC2
reconstruction of effective population size estimates
(N e) over time, estimated using generation time
of 12.8 years and mutation rate of 2.89 x 10-9substitutions per nucleotide per generation. Light-brown vertical bars
represent interglacial periods. Upper panel represents global
temperature changes as inferred from the EPICA (European Project for
Ice Coring in Antarctica) Dome C ice core (Augustin et al. 2004). Lower
panel represents sea level changes inferred from a stack of 57 globally
distributed benthic δ18O records (Lisiecki & Raymo 2005).
Figure 2. Comparison of genome-wide heterozygosity among
Procellariiformes. (a) Density plots showing the distribution of
individual nucleotide diversity (π ) values in nonoverlapping 25Kb
windows for each of the eight Procellariiformes species with an
available reference genome. Scientific names of large-bodied and
small-bodied species are shown in green and orange, respectively.
Color-scale represents π values tail probabilities as shown in
the legend. The white line depicts median values and black lines depict
25th and 75th percentiles. (b) Density plots showing the distribution ofπ values in large-bodied and small-bodied species groups.
Figure 3. Ultrametric tree based on the 4D CDS ML tree
calibrated with r8s. Minimum number of gains (green) and losses (red)
per branch are represented according to BadiRate analysis. Numbers in
ancestral nodes and in the tips (in parenthesis) indicate the inferred
number of genes. Illustrations of seabird species were reproduced with
permission from Lynx Edicions and Martí Franch.