Table 2.

Criteria for inclusion or exclusion from the review

Inclusion/exclusion criterion	Rationale for inclusion/exclusion
Must contain novel research about the fate of carbon from naturally occurring macroalgal communities.	Cultivated macroalgae are negligible in scale in comparison to naturally occurring macroalgal communities. Theoretical models and other reviews were excluded in favor of primary research.
Must not contain research conducted solely in laboratory settings.	Laboratory experiments alone cannot be used to determine whole ecosystem productivity or the fate of that productivity.
Must report quantitative data on macroalgal carbon displacement, ideally constrained by time and area.	Quantitative information on carbon flux between different pools is required for the comparison of macroalgae to other communities and for integration into large‐scale carbon models.
Must contain information on the fate of productivity and not productivity alone.	Information on productivity alone is not sufficient to determine the fate of this productivity.
Must be in English	There was no capacity to translate publications into languages other than English.