Coral Reefs

pp 1–16

Contrasting patterns of connectivity among endemic and widespread fire coral species (Millepora spp.) in the tropical Southwestern Atlantic

  • Júlia N. de Souza
  • Flávia L. D. Nunes
  • Carla Zilberberg
  • Juan A. Sanchez
  • Alvaro E. Migotto
  • Bert W. Hoeksema
  • Xaymara M. Serrano
  • Andrew C. Baker
  • Alberto Lindner
Report

DOI: 10.1007/s00338-017-1562-0

Cite this article as:
de Souza, J.N., Nunes, F.L.D., Zilberberg, C. et al. Coral Reefs (2017). doi:10.1007/s00338-017-1562-0

Abstract

Fire corals are the only branching corals in the South Atlantic and provide an important ecological role as habitat-builders in the region. With three endemic species (Millepora brazilensis, M. nitida and M. laboreli) and one amphi-Atlantic species (M. alcicornis), fire coral diversity in the Brazilian Province rivals that of the Caribbean Province. Phylogenetic relationships and patterns of population genetic structure and diversity were investigated in all four fire coral species occurring in the Brazilian Province to understand patterns of speciation and biogeography in the genus. A total of 273 colonies from the four species were collected from 17 locations spanning their geographic ranges. Sequences from the 16S ribosomal DNA (rDNA) were used to evaluate phylogenetic relationships. Patterns in genetic diversity and connectivity were inferred by measures of molecular diversity, analyses of molecular variance, pairwise differentiation, and by spatial analyses of molecular variance. Morphometrics of the endemic species M. braziliensis and M. nitida were evaluated by discriminant function analysis; macro-morphological characters were not sufficient to distinguish the two species. Genetic analyses showed that, although they are closely related, each species forms a well-supported clade. Furthermore, the endemic species characterized a distinct biogeographic barrier: M. braziliensis is restricted to the north of the São Francisco River, whereas M. nitida occurs only to the south. Millepora laboreli is restricted to a single location and has low genetic diversity. In contrast, the amphi-Atlantic species M. alcicornis shows high genetic connectivity within the Brazilian Province, and within the Caribbean Province (including Bermuda), despite low levels of gene flow between these populations and across the tropical Atlantic. These patterns reflect the importance of the Amazon–Orinoco Plume and the Mid-Atlantic Barrier as biogeographic barriers, and suggest that, while M. alcicornis is capable of long-distance dispersal, the three endemics have restricted ranges and more limited dispersal capabilities.

Keywords

Biogeographic barriers Endemics Genetic diversity Genetic structure Peripheral populations Phylogenetics 

Supplementary material

338_2017_1562_MOESM1_ESM.docx (716 kb)
Supplementary material 1 (DOCX 716 kb)
338_2017_1562_MOESM2_ESM.docx (45 kb)
Supplementary material 2 (DOCX 45 kb)
338_2017_1562_MOESM3_ESM.fas (40 kb)
Supplementary material 3 (FAS 40 kb)

Funding information

Funder NameGrant NumberFunding Note
CNPq
  • 563276/2010-0
FAPESC
  • 6308/2011-8
FAPESP
  • 2006/02960-8
  • 2006/05821-9
  • 2006/60327-0
Laboratoire d'Excellence (LabexMER)
  • ANR-10-LABX-19

Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Júlia N. de Souza
    • 1
  • Flávia L. D. Nunes
    • 2
    • 3
  • Carla Zilberberg
    • 4
  • Juan A. Sanchez
    • 5
  • Alvaro E. Migotto
    • 6
  • Bert W. Hoeksema
    • 7
  • Xaymara M. Serrano
    • 8
    • 9
  • Andrew C. Baker
    • 8
  • Alberto Lindner
    • 1
  1. 1.Departamento de Ecologia e ZoologiaUniversidade Federal de Santa CatarinaFlorianópolisBrazil
  2. 2.Laboratoire des Sciences de l’Environnement Marin, LEMAR UMR 6539 CNRS/UBO/IRD/Ifremer, Université de Brest (UBO), Université Européenne de Bretagne (UEB)Institut Universitaire Européen de la Mer (IUEM)PlouzanéFrance
  3. 3.Laboratoire d’Écologie Benthique Côtière, DYNECOIfremer Centre BretagnePlouzanéFrance
  4. 4.Departamento de Zoologia, Instituto de BiologiaUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
  5. 5.BIOMMAR, Department of Biological SciencesUniversidad de los AndesBogotáColombia
  6. 6.Centro de Biologia MarinhaUniversidade de São PauloSão SebastiãoBrazil
  7. 7.Naturalis Biodiversity CenterLeidenThe Netherlands
  8. 8.Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric ScienceUniversity of MiamiMiamiUSA
  9. 9.Atlantic Oceanographic and Meteorological LaboratoryNational Oceanic and Atmospheric AdministrationMiamiUSA

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