Fig. 1.

Mean vulnerability curves for each of the seven herbaceous Brassicaceae species studied native to different vegetation zones of Tenerife (Canary Islands), with reference to the sampling localities for Hirschfeldia incana and Sisymbrium orientale. Shaded bands represent P₅₀ standard errors, and 50 % percentage loss of conductivity (PLC) is indicated by the horizontal dotted line. L.L. refers to the more humid population of H. incana collected in the city of La Laguna. The numbers 1 and 2 of Sisymbrium orientale refer to the populations collected in drier and more humid sites, respectively. See Supplementary Data Fig S1.