Figure captions
Figure 1. The location of study site and associated mean daily
ambient temperature during breeding season at the four study sites
(Paisha
Island and Bohai Bay from May to June, Qinghai Lake
from
May to July and Taitema Lake from in mid-April to July). The mean daily
temperatue has significant different between four sites (ANOVA:
F3,361 = 348, p < 0.001).
Figure 2. Coefficient estimates of the interaction between
temperature (independent variable) and each dependent variable according
to the PGLMMs. a) Coefficient estimates plot for each of male body mass
(MMa), Female body mass (FMa), Male coloration (MPC1) and male’s
ornamental trait area size (MPC2) and their respective interactions with
temperature. The centre points denote the means, the thick bars denote
the 95% lower and upper confidence interval as calculated by PGLMMs
simulated by bootstrapping with 1,000 iterations in R. b–d) Model
predictions of the interaction between male body mass or ornamental
traits and ambient temperature with male ornamental traits (b), female
tarsus length (c), and male incubation investment (d).
Figure 3. Path models showing the influence of male and female
body mass and male ornament color on parents’ incubation investment in
temperatures (a) below and (b) above the mean temperature across the
four environments (23.782 ℃). The left bars show the average time (min)
parents spent incubating the nest in a 3-hour period. Dotted lines with
the double-ended arrow indicate correlations and solid lines with a
single arrow indicate path coefficients. The black lines represent
significant negative relationships and the red lines represent
significant positive relationships. Non-significant paths were removed
from the figure.
Figure 1