Figure 2. The behaviors of the dynamics of ecological prisoner's dilemma games on a phase plane.
Plots (i)–(xv) correspond to part i–xv in Fig. 1, respectively. Solid circles represent stable equilibriums; open circles represent unstable equilibriums. Parameters are 
, 
, 
for all diagrams, except 
and 
for (i), 
and 
for (ii), 
and 
for (iii), 
and 
for (iv), 
and 
for (v), 
and 
for (vi), 
and 
for (vii), 
and 
for (viii), 
and 
for (ix), 
and 
for (x), 
and 
for (xi), 
and 
for (xii), 
and 
for (xiii), 
and 
for (xiv), and 
and 
for (xv).