However, such experiments are not always feasible for all organisms, for a number of reasons, including high mortalities under laboratory conditions, long-lived or endangered species.
What can we do to make more organisms feasible for these type of experiments?
However, the confounding processes previously mentioned cannot be ruled out based solely on these experiments and a direct estimation of the genetic determination is needed (de Villemereuil et al., 2016).
I like this statement because it reminds us that the experiment is not enough to prove adaptation because of other factors.
The two species of mussels responded differently, to warming and pCO2. The native mussel T. hirsuta grew more under warming (Fig. 1; ANOVA Species × Temperature F1,32 = 6.13, P < 0.05; Supplementary Table 2). In contrast, M. galloprovincialis grew the same at ambient and elevated temperatures (Fig. 1; Supplementary Table 2). There was no effect of elevated pCO2 on growth in either of the mussel species (ANOVA CO2 F1,32 = 0.53, P > 0.05; Supplementary Table 2).
This shows us that M. galloprovincialis was not affected by the temperatures which can lead to a conclusion that temperatures does not affect them. Also, that they can thrive better no matter if the temperatures warm up.