Title

Shared Phylogeographical Breaks in a Caribbean Coral Reef Sponge and Its Invertebrate Commensals

Authors

M. B. DeBiasse, Louisiana State University
Vincent P. Richards, Clemson University
Mahmood S. Shivji, Nova Southeastern UniversityFollow
Michael E. Hellberg, Louisiana State University - Baton Rouge

Document Type

Article

Publication Date

11-2016

Publication Title

Journal of Biogeography

Keywords

Amphipod, Brittle star, Callyspongia, Comparative phylogeography, Cryptic species, Leucothoe, Ophiothrix

ISSN

0305-0270

Volume

43

Issue/No.

11

First Page

2136

Last Page

2146

Abstract

Aim

To test whether phylogeographical barriers in the brooding sponge Callyspongia vaginalis match breaks previously identified in the Caribbean. We also compared patterns of subdivision in the sponge to those of three of its commensals, the broadcast spawning brittle star Ophiothrix suensonii and the brooding amphipods Leucothoe ashleyae and L. kensleyi, and tested whether any shared breaks arose simultaneously.

Location

Florida, Bahamas and the Caribbean.

Methods

Subdivision of C. vaginalis populations was inferred from one mitochondrial (COI) and six nuclear loci using clustering analyses. We identified phylogeographical breaks in the sponge and its invertebrate commensals by determining geographical patterns of genetic variation and tested simultaneous population divergence across barriers shared among taxa using hierarchical approximate Bayesian computation.

Results

Sponge populations were partitioned into western and eastern groups across the Caribbean, with hierarchical subdivision within regions. The sponge and its commensals shared barriers across their ranges despite differences in dispersal strategy: C. vaginalis, L. ashleyae andO. suensonii populations in Central America were isolated from the remainder of the Caribbean, and all four taxa shared a break between Florida and the Bahamas, although simultaneous population divergence could not be inferred with statistical certainty. Our results also suggest cryptic speciation within C. vaginalis.

Main conclusions

Phylogeographical patterns in C. vaginalis largely matched barriers previously identified at the Florida Straits, Mona Passage and Bay of Honduras in other Caribbean taxa. Oceanographic features such as deep water between locations, strong currents, and eddies are likely mechanisms responsible for these breaks.

Comments

©2016 John Wiley & Sons Ltd

Additional Comments

NOAA award #: NA04NOS4260065; GenBank accession #s: LK026325-LK026602, LK026931-LK028492, LT556086-LT556285

NSUWorks Citation

DeBiasse, M. B.; Vincent P. Richards; Mahmood S. Shivji; and Michael E. Hellberg. 2016. "Shared Phylogeographical Breaks in a Caribbean Coral Reef Sponge and Its Invertebrate Commensals." Journal of Biogeography 43, (11): 2136-2146. doi:10.1111/jbi.12785.

ResearcherID

G-4080-2013

DOI

10.1111/jbi.12785