Coral Reefs

, Volume 33, Issue 4, pp 1113–1113 | Cite as

Reef oases in a seamount chain in the southwestern Atlantic

Reef Site

Keywords

Fishing Reef Fish Reef Patch Fishing Effort Crustose Coralline Alga 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
The Vitória-Trindade Chain (VTC) is a line of seamounts extending 1,200 km eastwards from the central Brazilian coast (20°S) to the Trindade and Martin Vaz islands (Fig. 1a). These seamounts present mesophotic summits (60–55 m depths) that are predominantly flat and covered by soft sediments and rhodolith beds (Pereira-Filho et al. 2011; Fig. 1b). High-relief biogenic reefs (Fig. 1c) were only recently found in the VTC, during two expeditions in 2011. These singular structures are mostly built by crustose coralline algae and sparse corals and hydrocorals (Fig. 1d), reaching up to 35–17 m (Vitória and Davis seamounts) and 62–84 m depths (Jaseur and Columbia seamounts). Structural reefs shelter a richer and more abundant fauna than the surrounding flat beds, including large, endangered, and commercially important reef fishes (Fig. 1e). Although being small and sparse, reef patches represent a critical habitat in the VTC, functioning as connectivity stepping-stones for several reef organisms that reach and maintain permanent populations in the isolated islands (Floeter and Gasparini 2000). As fishing effort is largely unregulated and mining of carbonates is already taking place at the VTC, the region urgently needs increased scientific and conservation efforts.
Fig. 1

Reef habitats of the Vitória-Trindade Chain (a), off central Brazil: (b) rhodolith beds (60 m depth); (c) and (d) coralline algae reefs of Vitória Seamount, with details of the reef crests (35 m) and (e) reef–sand interface (55 m). Map: J. B. Teixeira. Photos: H. T. Pinheiro

References

  1. Floeter S, Gasparini J (2000) The southwestern Atlantic reef fish fauna: composition and zoogeographic patterns. J Fish Biol 56:1099–1114CrossRefGoogle Scholar
  2. Pereira-Filho G, Amado-Filho GM, Moura RL, Bastos AC, Guimarães SMPB, Salgado LT, Francini-Filho RB, Bahia RG, Abrantes DP, Guth AZ, Brasileiro PS (2011) Extensive rhodolith beds cover the summits of southwestern Atlantic ocean seamounts. J Coast Res 28:261–269Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Department of Ecology and Evolutionary BiologyUniversity of California Santa CruzSanta CruzUSA
  2. 2.California Academy of SciencesSan FranciscoUSA
  3. 3.Departamento de Oceanografia e EcologiaUniversidade Federal do Espírito SantoVitóriaBrazil
  4. 4.Instituto de Biologia and SAGE/COPPEUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil

Personalised recommendations