Abstract
Most reported Diadema antillarum restocking has resulted in low survival and retention. These outcomes challenge conservation and restoration goals. A manipulative study was conducted to evaluate site retention, tandem coral-urchin restoration, and herbivory from 200 adult D. antillarum translocated to five experimental plots off Key Biscayne, Florida. Two additional plots were monitored as controls. Surveys revealed homogeneous dispersal over time, with overall retention of 94.5%, 79.5%, 56.0% and 22.5% at 1-, 7-, 84- and 267-days post-release, respectively. Rugosity significantly predicted urchin retention and plots with higher relief exhibited reduced emigration rates. Benthic image analysis revealed a significant decline in macroalgae relative to controls when urchin densities were above 0.15 m−2 but not at 0.04 m−2. Urchin plots experienced a 27% reduction in macroalgae from days 7 to 84. Results indicated higher long-term retention, especially within plots with greater relief, and evidence for ecologically significant herbivory following a single translocation event.
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References
Alvarez-Filip L et al (2009) Flattening of Caribbean coral reefs: region-wide declines in architectural complexity. Proc R Soc B Biol Sci 276(1669):3019–3025
Burdick DR (2008) The effectiveness of macroalgal reduction and Diadema antillarum addition in limiting macroalgal growth and facilitating coral recovery. In: Proc 11th Int Coral Reef Symp. Vol 24 Ft Lauderdale, Florida
Carpenter RC (1984) Predator and population density control of homing behavior in the Caribbean echinoid Diadema antillarum. Mar Biol 82:101–108
Dame EA (2008) Assessing the effect of artificial habitat structure on translocation of the long-spined sea urchin, Diadema antillarum, in Curaçao (Netherlands Antilles). Bull Mar Sci 82:247–254
Delgado GA, Sharp WC (2021) Does artificial shelter have a place in Diadema antillarum restoration in the Florida Keys? Tests of habitat manipulation and sheltering behavior. Glob Ecol Conser 26:e01502
Furman BT, Heck KL (2008) Effects of nutrient enrichment and grazers on coral reefs: An experimental assessment. Mar Ecol Prog Ser 363:89–101
Hylkema A et al (2022) Assisted natural recovery: a novel approach to enhance Diadema antillarum recruitment. Front Mar Sci 9:929355
Kohler KE, Gill SM (2006) Coral Point Count with Excel extensions (CPCe): A Visual Basic program for the determination of coral and substrate coverage using random point count methodology. Comput Geosci 32(9):1259–1269
Lang JC et al (2010) AGRRA protocols version 5.4. Atlantic and Gulf Rapid Reef Assessment Program, Florida, USA, 1–31
Lessios HA, Glynn PW, Robertson DR (1983) Mass mortalities of coral reef organisms. Science 222(4625):715–715
Nedimyer K, Moe MA (2003) Techniques development for the re-establishment of the long-spined sea urchin, Diadema antillarum, on two small patch reefs in the upper Florida Keys. Science Report: An Ecosystem Report Card After Five Years of Marine Zoning 268
Pilnick AR et al (2021) A novel system for intensive Diadema antillarum propagation as a step towards population enhancement. Sci Rep 11(1):1–13
Pilnick AR et al (2022) Development of larviculture protocols for the long-spined sea urchin (Diadema antillarum) and enhanced performance with diets containing the cryptophyte Rhodomonas lens. Aquac Int 10:1–8
Ripple K (2017) Tandem restoration of Diadema antillarum and Acropora cervicornis for enhanced reef recovery. Thesis, University of Florida
Rogers A, Lorenzen K (2016) Does slow and variable recovery of Diadema antillarum on Caribbean fore-reefs reflect density-dependent habitat selection? Front Mar Sci 3:63
Sharp WC, Reckenbeil BA (2021) Predation on a newly-stocked long-spined sea urchin (Diadema antillarum) by the batwing coral crab (Carpilius corallinus) on a coral reef restoration site. Bull Mar Sci 98(1):99–100
Spiers LJ et al (2021) The role of algal chemical defenses in the feeding preferences of the long-spined sea urchin Diadema antillarum. Aquat Ecol 55(3):941–953
Team RC (2020) R: A language and environment for statistical computing
Westbrook CE et al (2015) Survivorship and feeding preferences among size classes of outplanted sea urchins, Tripneustes gratilla, and possible use as biocontrol for invasive alien algae. PeerJ 2015:e1235
Wijers T et al (2023) Novel shaker bottle cultivation method for the long spined sea urchin (Diadema antillarum; Philippi, 1845) results in high larval survival and settlement rates. Aquaculture 562:738855
Williams AH (1981) An analysis of competitive interactions in a patch back-reef environment. Ecology 62(4):1107–1120
Williams SM (2022) The reduction of harmful algae on Caribbean coral reefs through the reintroduction of a keystone herbivore, the long-spined sea urchin Diadema antillarum. Restor Ecol 30(1):e13475
Yanovski R, Nelson PA, Abelson A (2017) Structural complexity in coral reefs: examination of a novel evaluation tool on different spatial scales. Front Ecol Evol 5:27–27
Acknowledgements
All work described occurred under Florida Fish and Wildlife Conservation Commission Special Activity License permit #SAL-20-2287-R. Funding was mainly provided by the Florida Department of Environmental Protection and the National Fish and Wildlife Foundation. Additional support came from USDA/NIFA HATCH project #FLA-FOR-005902. We are grateful for additional assistance provided by Jay Casello, Mack Hollins, Shannon Jones, Andy Dehart, Rachel Serafin, and other members of Force Blue, The University of Florida Josh Patterson lab, and the University of Miami Rescue a Reef program.
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Conceptualization, formal analysis, investigation, data curation, writing—original draft were contributed by Aaron R. Pilnick; investigation, visualization, writing—review and editing were contributed by Joseph A. Henry; conceptualization, investigation, methodology, writing—review and editing were contributed by Dalton Hesley; conceptualization, investigation, resources, writing—review and editing were contributed by John L. Akins; conceptualization, resources, supervision, writing—review and editing were contributed by Joshua T. Patterson; conceptualization, funding acquisition, supervision, methodology, resources, writing—review and editing were contributed by Diego Lirman.
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No specific approval of research ethics committees was required to accomplish the goals of this study because experimental work was conducted with an unregulated invertebrate species.
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Pilnick, A.R., Henry, J.A., Hesley, D. et al. Long-term retention and density-dependent herbivory from Diadema antillarum following translocation onto a reef restoration site. Coral Reefs 42, 629–634 (2023). https://doi.org/10.1007/s00338-023-02369-5
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DOI: https://doi.org/10.1007/s00338-023-02369-5