Du développement durable à la transition écologique dans les tweets : Des phraséotermes concurrents du domaine écologique ?

This paper focuses on the common uses of two phraseological units from the ecological domain, développement durable ‘sustainable development’ and transition écologique ‘ecological transition’, in Twitter discourses. An over- view of their terminological description is followed by an analysis of the themes most frequently associated with the two phraseological units. An exploration of their lexico-discursive profiles highlights then their main uses in this discursive space as well as their semantic and pragmatic differences. The results show par- tially distinct discursive profiles which could contribute to convey different per- spectives of the ecological issue.