Journal of Insect Conservation

, Volume 4, Issue 4, pp 239–244 | Cite as

Ground Beetles (Coleoptera, Carabidae) in Forest Fragments of the Manawatu, New Zealand: Collapsed Assemblages?

Article

Abstract

Botanically diverse and well-maintained, protected forest fragments in the Manawatu area of the North Island of New Zealand contained very species-poor carabid assemblages. In a nearby large forest tract, the potential source area, nine species were caught in pitfall traps, while the largest forest remnant had two species, and a well-managed suburban forest patch had three species but only one with a potentially reproducing population. Lack of grazing and high botanical diversity was insufficient to maintain the potential carabid assemblage in these fragments. Predation risk and a low dispersal power in endemic New Zealand ground beetles, combined with fragment size and degree of isolation could contribute to this collapse. Active management of ground-active invertebrate species seems necessary to protect them in isolated forest fragments in New Zealand.

carabid assemblages collapse, diversity forest fragment New Zealand 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  1. 1.Ecology Group, Institute of Natural ResourcesMassey UniversityPalmerston NorthNew Zealand
  2. 2.Department of Crop Protection, Flakkebjerg Research CentreDanish Institute of Agricultural SciencesSlagelseDenmark
  3. 3.Ecology Group, Institute of Natural ResourcesMassey UniversityPalmerston NorthNew Zealand
  4. 4.Zoologisches Institut und Museum EMAUGreifswaldGermany

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