Marine Biodiversity

, Volume 46, Issue 2, pp 407–420

Macroalgal composition and community structure of the largest rhodolith beds in the world

  • P. S. Brasileiro
  • G. H. Pereira-Filho
  • R. G. Bahia
  • D. P. Abrantes
  • S. M. P. B. Guimarães
  • R. L. Moura
  • R. B. Francini-Filho
  • A. C. Bastos
  • G. M. Amado-Filho
Original Paper

DOI: 10.1007/s12526-015-0378-9

Cite this article as:
Brasileiro, P.S., Pereira-Filho, G.H., Bahia, R.G. et al. Mar Biodiv (2016) 46: 407. doi:10.1007/s12526-015-0378-9

Abstract

The Abrolhos Bank, encompassing a wide portion of the Brazilian continental shelf, harbors the world's largest rhodolith bed, which plays an important role in calcium carbonate production in the South Atlantic Ocean. Little is known about the community structure and species composition of this habitat. The aim of this study was to test the hypothesis that latitudinal differences exist in the community structure of rhodolith beds and their associated flora along the Abrolhos Bank. We sampled a total of 33 sites of rhodolith beds located in three regions—northern, central, and southern—of the Abrolhos Bank between depths of 20 and 70 m. Rhodolith density (rhod. m−2) within the beds ranged from 990 ± 347.6 to 57 ± 18.7, with mean diameter ranging from 9.4 ± 3.2 to 3.1 ± 1.4 cm. A total of 146 macroalgae species were identified, including 14 rhodolith-forming species of crustose coralline algae. Abrolhos Bank supports the world’s greatest species richness of rhodolith-forming CCA, with regional distinctiveness. Observed differences in bed structure among regions can be related to differences in shelf width, slope and depth. The studied rhodolith beds constitute a unique habitat supporting a distinctive diversity of associated organisms, and thus require special attention. We highlight the importance of local and regional differences for defining appropriate conservation strategies to protect the rhodolith bed diversity of Abrolhos Bank.

Keywords

Abrolhos Bank Mesophotic Percentage cover Associated flora Crustose coralline algae 

Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • P. S. Brasileiro
    • 1
  • G. H. Pereira-Filho
    • 2
  • R. G. Bahia
    • 1
  • D. P. Abrantes
    • 1
  • S. M. P. B. Guimarães
    • 3
  • R. L. Moura
    • 4
  • R. B. Francini-Filho
    • 5
  • A. C. Bastos
    • 6
  • G. M. Amado-Filho
    • 1
  1. 1.Instituto de Pesquisas Jardim Botânico do Rio de JaneiroRio de JaneiroBrazil
  2. 2.Instituto do MarUniversidade Federal de São PauloPonta da Praia, SantosBrazil
  3. 3.Núcleo de Pesquisa em Ficologia, Secretaria do Meio Ambiente do Estado de São PauloInstituto de BotânicaÁgua Funda, São PauloBrazil
  4. 4.Departamento de Biologia Marinha, Instituto de Biologia, Centro de Ciências da SaúdeUniversidade Federal do Rio de JaneiroCidade Universitária, Rio de JaneiroBrazil
  5. 5.Centro de Ciências Aplicadas e EducaçãoUniversidade Federal da ParaíbaRio TintoBrazil
  6. 6.Departamento de OceanografiaUniversidade Federal do Espírito SantoVitóriaBrazil