Difference between direct and indirect effect

Direct effects, as the name suggests, while not manipulated or communicated by a third party, deal with the direct influence of one entity on another. Indirect effects can be described as the influence, mediated or passed on by a third, of one organism or species on another.

straight or amphibians are homeothermic to thermal

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.