Hydrobiologia

, 637:249 | Cite as

A remarkable case of fiddler crab, Uca spp., alpha diversity in Wallacea

Short research note

Abstract

A preliminary attempt was made to quantify the alpha diversity of fiddler crabs (Uca spp.) along a short transect across the interface between an intertidal mudflat and a largely Avicennia mangrove at Ambeua on the Indonesian island of Kaledupa in Sulawesi Tenggara, by means of visual counts within 2 m2 quadrats. An astounding diversity of up to six seemingly coexisting species per quadrat—and a total of seven such species within an area of 4 m2—was revealed. Four species of the ecologically equivalent sentinel crabs (Macrophthalmus) were also present in the quadrats. Seven fiddler crab species equates to more than half those known from Wallacea, more than one-third of all those known from Indonesia, and almost one-fifth of the entire Uca fauna of the Indo-West-Pacific.

Keywords

Biodiversity Brachyura Coexistence Indonesia Mudflat Wallacea 

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Department of ZoologyUniversity of CambridgeCambridgeUK
  2. 2.Marine Research CentrePulau Hoga, Wakatobi, Sulawesi TenggaraIndonesia

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