Figure 3
From: Radiocarbon analysis reveals expanded diet breadth associates with the invasion of a predatory ant
The abundance of B. chinensis and termite nests collected at each sampling point. (a) Relationship between the number of B. chinensis nests and the abundance of termites in the native and introduced ranges of B. chinensis. We collected 73 R. speratus nests in Japan and 121 R. flavipes, 51 R. virginicus and one R. hageni nests in the United States. There was no significant relationship between the number of B. chinensis nests and the abundance of termites in Japan (χ 2 = 1.01, P = 0.32) and in the United States (χ 2 = 2.58, P = 0.11; likelihood ratio test). The size of each plot is proportional to the number of data points it represents. (b) Comparison of termite presence between the downed logs with and without B. chinensis colonies. The proportion of logs containing termites was higher than those without B. chinensis both in the native (χ 2 = 4.126, P < 0.05) and introduced ranges (χ 2 = 5.243, P < 0.05; likelihood ratio test).
