Demography and management of the invasive plant species Hypericum perforatum. I. Using multi-level mixed-effects models for characterizing growth, survival and fecundity in a long-term data set
NERC Centre for Population Biology and;Department of Biology, Imperial College London, Silwood Park, Ascot, Berkshire SL5 7PY, UK;and;CSIRO Entomology and CRC for Australian Weed Management, GPO Box 1700, Canberra, ACT 2601, Australia