Long distance dispersal and vertical gene flow in the Caribbean brooding coral Porites astreoides

Xaymara M. Serrano, Iliana B. Baums, Tyler B. Smith, Ross J. Jones, Tonya L. Shearer, Andrew C Baker

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

To date, most assessments of coral connectivity have emphasized long-distance horizontal dispersal of propagules from one shallow reef to another. The extent of vertical connectivity, however, remains largely understudied. Here, we used newly-developed and existing DNA microsatellite loci for the brooding coral Porites astreoides to assess patterns of horizontal and vertical connectivity in 590 colonies collected from three depth zones (≤10 m, 15-20 m and ≥25 m) at sites in Florida, Bermuda and the U.S. Virgin Islands (USVI). We also tested whether maternal transmission of algal symbionts (Symbiodinium spp.) might limit effective vertical connectivity. Overall, shallow P. astreoides exhibited high gene flow between Florida and USVI, but limited gene flow between these locations and Bermuda. In contrast, there was significant genetic differentiation by depth in Florida (Upper Keys, Lower Keys and Dry Tortugas), but not in Bermuda or USVI, despite strong patterns of depth zonation in algal symbionts at two of these locations. Together, these findings suggest that P. astreoides is effective at dispersing both horizontally and vertically despite its brooding reproductive mode and maternal transmission of algal symbionts. In addition, these findings might help explain the ecological success reported for P. astreoides in the Caribbean in recent decades.

Original languageEnglish (US)
Article number21619
JournalScientific Reports
Volume6
DOIs
StatePublished - Feb 22 2016

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Bermuda
Anthozoa
Gene Flow
Islands
Mothers
Microsatellite Repeats
DNA

ASJC Scopus subject areas

  • General

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Long distance dispersal and vertical gene flow in the Caribbean brooding coral Porites astreoides. / Serrano, Xaymara M.; Baums, Iliana B.; Smith, Tyler B.; Jones, Ross J.; Shearer, Tonya L.; Baker, Andrew C.

In: Scientific Reports, Vol. 6, 21619, 22.02.2016.

Research output: Contribution to journalArticle

Serrano, Xaymara M. ; Baums, Iliana B. ; Smith, Tyler B. ; Jones, Ross J. ; Shearer, Tonya L. ; Baker, Andrew C. / Long distance dispersal and vertical gene flow in the Caribbean brooding coral Porites astreoides. In: Scientific Reports. 2016 ; Vol. 6.
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