Fig 1.
Results of global climate change simulation experiments.
Photochemical performance, measured as photochemical efficiency (Fv/Fm) of photosystem II (PSII), and total biomass and the percentage of flowering plants from King George Island (A, B, C) and Antarctic Peninsula (D, E, F) are shown. Plants from all origins were exposed to four experimental treatments (temperature increase, water availability increase, temperature plus water increase and control). Bars are means (± SD). Bars labeled with different lowercase letters are significantly different (Tukey HSD tests, α = 0.05).
Table 1.
Results of the factorial ANOVAs evaluating the interactive effects of the site (King George Island and Antarctic Peninsula) and treatments (warming (+T°), watering (+W), simultaneous warming and watering (+T°+W) and controls) on (A) photochemical performance, measured as maximum quantum yield (Fv/Fm) of photosystem II (PSII), and (B) total biomass of Colobanthus quitensis.
Significant P values (< 0.05) are highlighted in bold.
Fig 2.
Survival of C. quitensis grown in three different soil types: non-sterilized native soil (NS, grey circles), sterilized native soil (S-NS, white circles), and sterilized native soil, re-inoculated with fungal endophytes (RI-SNS, black circles) under current (A) and simulated climatic change scenarios (B). Circles are means (± SE). Different letters indicate significant differences (Cox-Mantel tests, α = 0.05).
Fig 3.
Photochemical performance, measured as maximum quantum yield (Fv/Fm) of photosystem II (PSII), and total biomass of C. quitensis growing in three different soil types (NS: non-sterilized native soil, S-NS: sterilized native soil, and RI-SNS: re-inoculated native soil) under current (A and C), and future climatic conditions (B and D; 20% increased water addition). Bars are means (± SD). Bars labeled with different letters indicate significant differences (Tukey HSD tests, α = 0.05).
Table 2.
Results of factorial ANOVA evaluating the interactive effect of water addition (+W: future conditions) and treatments (non-sterilized, sterilized and re-inoculated sterilized soils) on (A) photochemical performance, measured as maximum quantum efficiency (Fv/Fm) of photosystem II (PSII), and (B) the total biomass of Colobanthus quitensis.
Significant P values (< 0.05) are highlighted in bold.