Fig. 2.

Bibliometric analysis of phyllosphere microbiome research based on the Web of Science Core Collection database from January 2010 to May 2021. (a) Keyword cooccurrence network. Nodes represent unique keywords; node size is proportional to the number of references; node colours indicate modules. (b) Burst word detection analysis. Length represents the burst status duration; colour saturation indicates citation burst strength. Bibliometric analysis was conducted by retrieving citation data based on a topic search using as query: ‘N deposition OR nitrogen deposition OR CO2 OR carbon dioxide OR precipitation OR temperature OR climate change) AND (phyllospher* OR leaf OR leaves) AND (fung* OR bacteria* OR microb* OR archaea* OR virus OR viral OR protist*’. The results were filtered to include items from January 2010 to May 2021, and were further analysed by CiteSpace (Chen et al., ²⁰¹⁰) to highlight the hotspots and frontier trends in the phyllosphere microbiome responses to global change.