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Description:
Project Manager:
Ron Hill
Project Years:
2019
2020
2021
Project Summary:
The acroporids contribute to the 3-dimensional structure of the reef and form important habitat for reef fishes and other reef organism. They reproduce sexually and asexually, being adapted to occasional fragmenting events in which new (clonal) colonies are formed and can, upon death, form part of the accretional matrix of the reef. Following recent losses of Acropora palmata and A. cervicornis, we are seeing an increased abundance of acroporid hybrids (e.g., Acropora prolifera), supplanting A. cervicornis, in some locations. Preliminary genetic analysis shows diversity in the hybrid reflective of sexual reproduction not simply fragmentation. The hybrids may be better adapted to current environmental conditions and better suited for reef restoration. We propose to 1) revisit permanent sampling sites in the northern Virgin Islands to document local (colony) conditions and monitor recovery dynamics of A. cervicornis and acroporid hybrids from earlier storm impacts, 2) expand surveys for hybrids and parental species, mapping, measuring and sampling colonies, 3) analyze genetic status and diversity of acroporids in and adjacent to sampling sites, and 4) grow and monitor fragments in nursery conditions to compare survival, growth, disease- and predator-resistance in order to guide future restoration efforts.
Expected Outcome:
From the study, we will gain a better understanding of the genetic relationship between the staghorn corals that form a significant part of the structure on shallow reefs and the matrix supporting reef accretion. We will document coral colonies and genotypes that are surviving and growing well under current environmental conditions. These recommendations will support local efforts to restore reefs using nursery grown fragments.
Project Locations:
Project Category:
Restoration
Project Type:
Ongoing
Project Status:
Funding Ended
Associated Products:
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