“…Some functions used in tweets, like user mentions and hashtags, reflect specific interactions around scientific publications as well. For instance, user mentions establish the relationships among users who might be related to or interested in the mentioned research, based on which the communities of users sharing interest can be detected (Araujo, 2020; Pearce, Holmberg, Hellsten, & Nerlich, 2014; Said et al, 2019; Van Schalkwyk, Dudek, & Costas, 2020). Hashtags added in scholarly Twitter mentions indicate particular concepts in relation to the mentioned publications (Haustein, Bowman, & Costas, 2016); therefore, the adoption of hashtags provides the opportunities of identifying not only the connections among tweets or users focusing on the same topics (Costas, Rijcke, & Marres, 2020; Hellsten & Leydesdorff, 2020), but also the broader public concerns about some specific research topics (Haunschild, Leydesdorff, Bornmann, Hellsten, & Marx, 2019; Lyu & Costas, 2020).…”