highly significantp < .001
Further examination of trends in standardized fruit size across positions in the two environments separately using quadratic regression confirms a negative linear decline in both environments and reveals a highly significant nonlinear (concave) decline in fruit size only for individuals under a constrained season (quadratic parameter estimate = –0.764 ± 0.109, t = 7.00, p < .001) and not under a long season (quadratic parameter estimate = 0.143 ± 0.093, t = 1.54, p = .125).