The intensification of socio-environmental conflicts (Scheidel, 2023) and the increase in deaths of activists in the last decade (Global Witness, 2022) is a global stage that challenges information pluralism in the media. From a transdisciplinary approach (Maldonado, 2019) of the semiotic-discursive paradigm, this qualitative research describes the socio-semiotic strategies of the social movement that prevail in the multimodal discourses mediated during the journalistic coverage of three case studies. With data mining tools, a universe of 16,116 posts issued on Twitter, Instagram, and Facebook from a heterogeneous group of Chilean digital media about the death of Macarena Valdés, Alejandro Castro and Camilo Catrillanca from 2016 to 2020 were obtained. The corpus was then inductively analyzed, selecting a non-probabilistic sample of the most frequent graphs in the news. Through multimodal discourse analysis (Kress and Van Leeuwen, 2001), the resources, designs, and modes used to represent identities and cultural elements that characterize the values ​​in dispute during socio-environmental conflict were identified. The socio-semiotic strategies (Otazo, 2004) are the personification of activists in graphics;resemiotization of symbols with variations in formats and materials; recurrence in types of manifestations that express values ​​and culture in resistance. The results allow us to conclude that the news images that the media share on their social media accounts reflect the visual framing of the protest frame (Morrison & Isaac, 2011) through activist agencies hypermediatized (Verón,1998; Fernandez, 2018) in the digital media ecosystem (Scolari, 2015), contributing to informative pluralism regarding these issues in Chile.