Figure 2.

Microbial Z_mu-based mutualism (two-way arrowed line) networks (a), Z_an-based antagonism (two-way T-shaped line) networks (b), Z_ag-based aggression (one-way T-shaped line) networks (c), and Z_al-based altruism (one-way arrowed line) networks (d) at the genus level within the gut microbiota of the Hutterites in winter and summer. In each network, hub microbes are highlighted in dark circles. These hub microbes, expressed as leaders, antagonists, hawks, and beneficiaries in mutualism, antagonism, aggression, and altruism networks, respectively, are compared with other microbes from each network type, called followers, agonists, doves, and altruists, respectively, in bar graphs. The significance of the difference between each pair of these types was tested by a t-test statistic. The identity of each genus is labeled by a number (Table S1). The distribution of links owned by each genus within each network is given in the middle, separately for winter (w) and summer (s)