species accumulation curves of the observed (continuous lines)and estimated (Jackknife 2, broken lines) species richness for each type of rubber plantation. Curves are plotted from the means of 50 randomisations of the sample accumulation order. 3a, arboreal ant samplings;3b, ground ant samplings. (Note the estimated richness of zero at one sample is an artefact of the Jackknife method)