Figure 2. Winter warming changes topological characteristics
and key genes of functional molecule ecological networks (fMENs):(a) the fMEN of control samples; (b) the fMEN of
warmed samples. Each dot or diamond represents a node (fungal functional
gene), and each line represents an edge (potential interaction).
Networks are separated into modules by using the greedy modularity
optimization method and shown as separate circles. Diamond nodes
represent key genes of fMENs. Diamond nodes inside modules represent
module hubs. Diamond nodes outside modules represent connectors.
Different colors of diamond nodes represent different functional genes,
and the number marked on each diamond node represents fungal species
containing the functional gene. Red lines represent negative links, and
black lines represent positive links.