Diversity and abundance of some ground-dwelling invertebrates in plantation vs. native forests in Tasmania, Australia

Land snails, millipedes, carabid beetles and velvet worms (Onychophora) were methodically hand-sampled at 46 localities on paired plots in conifer or eucalypt plantations and in nearby native forest in northwest Tasmania. Native land snails and millipedes were less diverse in plantations than in native forests, and introduced land snails were several times more abundant in plantations. Many taxa, however, including a velvet worm previously considered to be threatened by plantation development, and including almost half the taxa represented by 10 or more specimens, were found at least as commonly in plantations as in native forests. Invertebrate conservation may be assisted by specific forestry operations, including windrowing, mound ploughing, and leaving waste prunings and thinnings to rot. Plantation development on cleared farmland can allow invertebrates to re-invade from adjacent bush remnants, reducing the risk of local extinctions. (C) 2002 Elsevier Science B.V. All rights reserved.