Skip to main content
padlock icon - secure page this page is secure

Hydrodynamic conditions that favor the settlement of Diadema antillarum to a western Caribbean coral reef

Buy Article:

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

The reduction in the Diadema antillarum population (Philippi, 1845) across the Caribbean in the 1980s had adverse ecological consequences, including coral-algal phase-shifts. Reduced larval supply, and subsequent low recruitment success, has hampered population recovery. To examine larval density and the influence of hydrodynamics on settlement of D. antillarum, monthly plankton tows were conducted from May 2014 to April 2015 in the lagoon and fore reef zones of a western Caribbean coral reef (Xcalak, Mexico). A moored AWAC-Nortek oceanographic instrument recorded wave height, wave velocity, and suspended particles in the water column. To assess settlement of D. antillarum, collectors were placed along the lagoon and fore reef and inspected monthly. Monthly samples had a mean density of 0.06 larvae per 15 m3 from June to August corresponding to two developmental stages. Five settlers with test diameter ~1 mm were collected from August to December. During August, Doppler profiles recorded via the AWAC-Nortek instrument showed the lowest wave height values (<0.3 m) and a low bottom shear stress of <0.15 N m-1. Acoustic signals indicated that the particle displacement was driven primarily by wave action and that currents played a secondary role. During settlement of D. antillarum, wave orbital velocity (Uw) was below the threshold of motion (Uwr), allowing deposition of particles at the seabed. These hydrodynamic conditions suggest a window of opportunity for larval transport and benthic settlement. This is the first field study documenting the mechanisms that link hydrodynamics to the settlement of D. antillarum to a Caribbean reef.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Affiliations: Departamento de Recursos del Mar, Cinvestav

Appeared or available online: 05 October 2018

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more