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Ecological Research

, Volume 19, Issue 5, pp 461–467 | Cite as

Dragonfly species richness on man-made ponds: effects of pond size and pond age on newly established assemblages

  • Taku KADOYA
  • Shin-ichi SUDA
  • Izumi WASHITANI
Original Articles

We studied the abundance and species richness of adult dragonflies in 11 artificial ponds which were recently established (within 2 years). We found that the adult dragonfly assemblage patterns were influenced by pond size as well as pond age. The species richness was positively correlated with the pond size, which was because the distributional patterns of species were significantly nested according to pond area. The species richness was highly correlated with pond age in association with the vegetation cover within ponds. It was suggested that the species richness was enhanced by the increasing immigration rate of species which favor well-vegetated ponds.

Key words

nestedness Odonata random placement species diversity wetlands 

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Copyright information

© Blackwell Publishing Ltd 2004

Authors and Affiliations

  1. 1.Department of Ecosystem Studies, Institute of Agriculture and Life ScienceThe University of TokyoTokyoJapan

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