Host development times and survival across temperatures
and community contexts without parasitoids
In the absence of parasitoids, warming and competition levels altered
mean host development times by up to four days (30%) (Fig. S1, Fig.
S2). On average, shortening of developmental time due to warming was
more pronounced (Mean = -2 ± 0.2 days) than its extension due to
increased competition (Mean = +1.2 ± 0.2 days); and the changes were
consistent in direction for all species combinations (Table S1).
Survival rates were always highest in 24°C and low competition
treatments across all host species combinations, but species responses
to warming and competition varied (Fig. S3, Table S2 & Table S3). For
example, D. birchii survival (Post hoc odds ratio (OR) = 7.54, P
< 0.001) declined significantly more in elevated temperatures
than D. sulfurigaster (OR = 2.17, P = 0.002) (Fig. S3).