For quite some time, the emergence of the microblogging service Twitter enables to obtain fundamentally new insights about individuals, their behaviors and their relationships. Meanwhile, the social media application emerged as a popular communication medium also at conferences. In this regard, an analysis of the Twitter network has a great potential, where developments like the Biobased Economy could benefit from. In the absence of any analysis in this subject, the objective of this study is to find out what kind of information could be obtained from the Twitter communication and to what extent Twitter data is ideal for displaying and understanding networks. For this purpose short twitter messages sent during three different conferences were analysed. Based on conference-specific Hashtags (a Twitter language operator) data collection and visualization took place with the software program NodeXL. Overall, 722 users participated in the conversations, creating 3294 connections. In the Twitter networks of each conference 3 to 5 large groups of users could be documented. Each network contained a small number of core participants. Mainly individuals and institutions who actively participated in the conferences and thus were directly related to the events, whereas outside participants practically did not occur. Also some current and future applications and research areas could be identified. A thematic focus on basis of the microblogging data, however, was not always possible. Overall, the exchange of information on Twitter during the conferences was limited. Due to the study superficial network structures and patterns of interaction have been identified that could provide a basis for further investigations.