Some aspects of forest soil and litter ecology in the Dawyck Cryptogamic Sanctuary, with a particular reference to fungi The driving forces of species extinction in fragmented habitat Relationship of Indirect Effects of UV-B Radiation on Stomatal Movement of Vicia faba Leaves with Nitric Oxide and Hydrogen Peroxide Effects of parasitism on biological invasion in intraguild predation Biological control of alien invasive weeds and the effects of biocontrol agents on nontarget native species