網路社群已成為台灣公共事務中不可忽視的參與者，本文旨在分析網路社群在電子民主之下為實體團體與虛擬組織運用的情形，探討其是否有助於促成公民參與和數位公共領域的形成。並以桃園在地聯盟經營桃園觀音新屋藻礁的活動作為案例。研究方法方陎，兼採資料分析與質性訪談，訪談對象包含桃園在地聯盟成員、桃園縣環保局資訊股、活動參與和網站訂閱之民眾，從而取得公民互動經驗與科技使用態度的第一手資料。本研究發現，公民團體運用網路社群所強化電子民主之氛圍已逐漸蔓延，挑戰了政府的回應能力與因應措施，亦影響著動員宣傳的方式和代議制度的運作。隨著政治、社會與科技環境的轉變，電子民主已處於嶄新的環境系絡下，不論實體團體、虛擬組織與政府在運用與參與網路社群溝通與動員都應有新的認知與調適。

This research explores how the physical and virtual organizations apply the social network sites for public communication in the E-democracy age. Empirically the case of ecological conservation issue on algal reed in Taoyuan is examined to analyze how the social network sites affect the local citizen participation and the formation of digital public sphere. Based on the interviews to the members of involved civic groups, local government and activists this study discusses their attitudes to technology, interactive experience for participation. This study finds that the civic participants are capable of using online social networks for mobilization and promotion in the new trend, while the government seems challenged to response effectively under such conditions.