Table 2 Search strings for the literature searches conducted in English, along with the targeted organism group and platform within which the search was conducted.

Language	Search string	Group	Search platform	Conducted by
English	“ctmax” AND “freshwater” AND “aquatic” AND “critical thermal maximum”	Fish, invertebrates	Google Scholar	HSB
English	“lt50” AND “freshwater” AND “aquatic” AND “upper thermal tolerance”	Fish, invertebrates	Google Scholar	HSB
English	“freshwater” AND (“critical thermal maximum” OR “upper thermal tolerance” OR “lower thermal tolerance” OR “thermal tolerance breadth” OR “heat tolerance” OR “upper lethal temperature limit” OR “thermal tolerance window” OR “species temperature tolerance” OR “ctmax”)	Fish, invertebrates	Web of Science	HSB
English^a	“taxonomic name” AND “thermal tolerance” OR “heat tolerance” OR “ctmax” OR “incipient lethal temperature” OR “critical thermal maximum” OR “thermal limit”	Invertebrates	Google Scholar	HSB

Search terms for all languages can be found in Supplementary Table 1.
^aThe search terms were iterated across a list of taxonomic names for this search, with the respective taxonomic name serving as the first term in the search string.

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