Open AccessMosaics in the mangroves: allopatric diversification of tree‐climbing mudwhelks ( G astropoda: P otamididae: C erithidea ) in the I ndo‐ W est P acific
Author(s) -
Reid David G.,
Claremont Martine,
Smith Lisa,
Shamoto Manabu,
Glaubrecht Matthias,
Ozawa Tomowo
Publication year - 2013
Publication title -
biological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.906
H-Index - 112
eISSN - 1095-8312
pISSN - 0024-4066
DOI - 10.1111/bij.12151
Subject(s) - allopatric speciation , biology , mangrove , ecology , biotope , gastropoda , biological dispersal , habitat , population , demography , sociology
The I ndo‐ A ustralian A rchipelago ( IAA ) is the richest area of biodiversity in the marine realm, yet the processes that generate and maintain this diversity are poorly understood and have hardly been studied in the mangrove biotope. C erithidea is a genus of marine and brackish‐water snails restricted to mangrove habitats in the I ndo‐ W est P acific, and its species are believed to have a short pelagic larval life. Using molecular and morphological techniques, we demonstrate the existence of 15 species, reconstruct their phylogeny and plot their geographical ranges. Sister species show a pattern of narrowly allopatric ranges across the IAA , with overlap only between clades that show evidence of ecological differentiation. These allopatric mosaic distributions suggest that speciation may have been driven by isolation during low sea‐level stands, during episodes preceding the P lio‐ P leistocene glaciations. The M akassar S trait forms a biogeographical barrier hindering eastward dispersal, corresponding to part of Wallace's Line in the terrestrial realm. Areas of maximum diversity of mangrove plants and their associated molluscs do not coincide closely. © 2013 The Natural History Museum. Biological Journal of the Linnean Society © 2013 The Linnean Society of London, 2013, 110 , 564–580.