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Table 4 Reproductive cost ratio and reproduction ratio of C. stenophylla in the four climatic aridity zones (mean ± SE)

From: What drives the shift between sexual and clonal reproduction of Caragana stenophylla along a climatic aridity gradient?

  Semi-arid zone Arid zone Very arid zone Intensively arid zone Test method and result
CSR (g biomass/sapling) 5.35 ± 0.33 16.48 ± 0.86 31.06 ± 1.27 546.54 ± 89.09
CCR (g biomass/ramet) 7.74 ± 0.42 7.37 ± 0.23 6.50 ± 0.45 6.04 ± 0.34
GLMM test result of differences between CSR and CCR F1,6 = 8.488 P < 0.05 F1,6 = 52.162 P < 0.01 F1,6 = 146.593 P < 0.01 F1,6 = 14.519 P < 0.01
Reproductive cost ratio (CCR / CSR) 1.47 ± 0.16 0.45 ± 0.02 0.21 ± 0.02 0.01 ± 0.00 Regression analysis, R2 = 0.906, P < 0.01
Proportion of sexual reproduction 67.3% 40.0% 27.5% 10.7% GLMM F3,316 = 73.51 P < 0.01
Proportion of clonal reproduction 32.7% 60.0% 72.5% 89.3%
Reproduction ratio (sexual reproduction/ clonal reproduction) 2.08 ± 0.15 0.67 ± 0.04 0.38 ± 0.02 0.12 ± 0.01 Regression analysis, R2 = 0.967, P < 0.01
  1. CSR cost of sexual reproduction, CCR cost of clonal reproduction