only marginally significantP =0.0521
A 2x2 ANOVA revealed main effects of culture density (F(1, 35)=39.5; P <0.0001) and the interaction between density and species (F(1, 35)=23.2; P <0.0001), whereas the effect of species was only marginally significant (F(1, 35)=4.1; P =0.0521).