Nuestro objetivo es desarrollar diversas publicaciones científicas que destaquen nuestro compromiso con la conservación de nuestros recursos marinos.
La mayoría de las publicaciones están disponibles gratuitamente en nuestro sitio web.
2020
Gómez-Andújar, Nicolás X; Hernandez-Delgado, Edwin A
Spatial benthic community analysis of shallow coral reefs to support coastal management in Culebra Island, Puerto Rico. Journal Article
In: PeerJ, pp. 1-27, 2020.
Abstract | Links | BibTeX | Tags: Benthic community structure, Caribbean Coral Reefs, Coastal spatial variability, Ecosystem-based management, GIS, Mapping, Marine biology
@article{Gómez-Andújar2020,
title = {Spatial benthic community analysis of shallow coral reefs to support coastal management in Culebra Island, Puerto Rico.},
author = {Nicolás X Gómez-Andújar and Edwin A Hernandez-Delgado },
editor = {Gregory Verutes},
url = {https://pubmed.ncbi.nlm.nih.gov/33088617/
https://sampr.org/wp-content/uploads/2024/01/Spatial-benthic-community-analysis-of-shallow-coral-reefs-to-support-coastal-management-in-Culebra-Island-Puerto-Rico.pdf},
doi = {https://doi.org/10.7717/peerj.10080},
year = {2020},
date = {2020-10-14},
urldate = {2020-10-14},
journal = {PeerJ},
pages = {1-27},
abstract = {Caribbean coral reefs provide essential ecosystem services to society, including fisheries, tourism and shoreline protection from coastal erosion. However, these reefs are also exhibiting major declining trends, leading to the evolution of novel ecosystems dominated by non-reef building taxa, with potentially altered ecological functions. In the search for effective management strategies, this study characterized coral reefs in front of a touristic beach which provides economic benefits to the surrounding coastal communities yet faces increasing anthropogenic pressures and conservation challenges. Haphazard photo-transects were used to address spatial variation patterns in the reef’s benthic community structure in eight locations. Statistically significant differences were found with increasing distance from the shoreline, reef rugosity, Diadema antillarum density, among reef locations, and as a function of recreational use. Nearshore reefs reflected higher percent macroalgal cover, likely due to increased exposure from both recreational activities and nearby unsustainable land-use practices. However, nearshore reefs still support a high abundance of the endangered reef-building coral Orbicella annularis, highlighting the need to conserve these natural shoreline protectors. There is an opportunity for local stakeholders and regulatory institutions to collaboratively implement sea-urchin propagation, restoration of endangered Acroporid coral populations, and zoning of recreational densities across reefs. Our results illustrate vulnerable reef hotspots where these management interventions are needed and recommend guidelines to address them.},
keywords = {Benthic community structure, Caribbean Coral Reefs, Coastal spatial variability, Ecosystem-based management, GIS, Mapping, Marine biology},
pubstate = {published},
tppubtype = {article}
}
Caribbean coral reefs provide essential ecosystem services to society, including fisheries, tourism and shoreline protection from coastal erosion. However, these reefs are also exhibiting major declining trends, leading to the evolution of novel ecosystems dominated by non-reef building taxa, with potentially altered ecological functions. In the search for effective management strategies, this study characterized coral reefs in front of a touristic beach which provides economic benefits to the surrounding coastal communities yet faces increasing anthropogenic pressures and conservation challenges. Haphazard photo-transects were used to address spatial variation patterns in the reef’s benthic community structure in eight locations. Statistically significant differences were found with increasing distance from the shoreline, reef rugosity, Diadema antillarum density, among reef locations, and as a function of recreational use. Nearshore reefs reflected higher percent macroalgal cover, likely due to increased exposure from both recreational activities and nearby unsustainable land-use practices. However, nearshore reefs still support a high abundance of the endangered reef-building coral Orbicella annularis, highlighting the need to conserve these natural shoreline protectors. There is an opportunity for local stakeholders and regulatory institutions to collaboratively implement sea-urchin propagation, restoration of endangered Acroporid coral populations, and zoning of recreational densities across reefs. Our results illustrate vulnerable reef hotspots where these management interventions are needed and recommend guidelines to address them.
2019
Precht, William F.; Aronson, Richard B.; Gardner, Toby A.; Gill, Jennifer A.; Hawkins, Julie P.; Hernández-Delgado, Edwin A.; Jaap, Walter C.; Mcclanahan, Tim R.; Mcfield, Melanie D.; Murdoch, Thaddeus J. T.; Nugues, Maggy M.; Roberts, Callum M.; Schelten, Christiane K.; Watkinson, Andrew R.; Côté, Isabelle M.
Non-Random Timing of Ecological Shifts on Caribbean Coral Reefs Suggests Regional Causes of Change Journal Article
In: Advance in Marine Biology, vol. 87, pp. 1-24, 2019.
Abstract | Links | BibTeX | Tags: Caribbean Coral Reefs, Coral, coral loss, macroalgal cover, macroalgal dominance, Marine biology
@article{Precht2020,
title = {Non-Random Timing of Ecological Shifts on Caribbean Coral Reefs Suggests Regional Causes of Change},
author = {William F. Precht and Richard B. Aronson and Toby A. Gardner and Jennifer A. Gill and Julie P. Hawkins and Edwin A. Hernández-Delgado and Walter C. Jaap and Tim R. Mcclanahan and Melanie D. Mcfield and Thaddeus J.T. Murdoch and Maggy M. Nugues and Callum M. Roberts and Christiane K. Schelten and Andrew R. Watkinson and Isabelle M. Côté},
editor = {Marine and Coastal Programs},
url = {https://www.biorxiv.org/content/10.1101/672121v1.full
https://www.researchgate.net/publication/333988887_NON-RANDOM_TIMING_OF_ECOLOGICAL_SHIFTS_ON_CARIBBEAN_CORAL_REEFS_SUGGESTS_REGIONAL_CAUSES_OF_CHANGE
https://sampr.org/wp-content/uploads/2024/01/Non-random-Timing-of-Ecological-Shifts-on-Caribbean-Coral-Reefs-Suggests-Regional-Causes-of-Change.pdf},
doi = {https://doi.org/10.1101/672121},
year = {2019},
date = {2019-06-24},
urldate = {2019-06-24},
journal = {Advance in Marine Biology},
volume = {87},
pages = {1-24},
abstract = {Caribbean reefs have experienced unprecedented changes in the past four decades. Of great concern is the perceived widespread shift from coral to macroalgal dominance and the question of whether it represents a new, stable equilibrium for coral-reef communities. The primary causes of the shift -- grazing pressure (top-down), nutrient loading (bottom-up) or direct coral mortality (side-in) -- still remain somewhat controversial in the coral reef literature. We have attempted to tease out the relative importance of each of these causes. Four insights emerge from our analysis of an early regional dataset of information on the benthic composition of Caribbean reefs spanning the years 1977–2001. First, although three-quarters of reef sites have experienced coral declines concomitant with macroalgal increases, fewer than 10% of the more than 200 sites studied were dominated by macroalgae in 2001, by even the most conservative definition of dominance. Using relative dominance as the threshold, a total of 49 coral-to-macroalgae shifts were detected. This total represents ∼35% of all sites that were dominated by coral at the start of their monitoring periods. Four shifts (8.2%) occurred because of coral loss with no change in macroalgal cover, 15 (30.6%) occurred because of macroalgal gain without coral loss, and 30 (61.2%) occurred owing to concomitant coral decline and macroalgal increase. Second, the timing of shifts at the regional scale is most consistent with the side-in model of reef degradation, which invokes coral mortality as a precursor to macroalgal takeover, because more shifts occurred after regional coral-mortality events than expected by chance. Third, instantaneous observations taken at the start and end of the time-series for individual sites showed these reefs existed along a continuum of coral and macroalgal cover. The continuous, broadly negative relationship between coral and macroalgal cover suggests that in some cases coral-to-macroalgae phase shifts may be reversed by removing sources of perturbation or restoring critical components such as the herbivorous sea urchin Diadema antillarum to the system. The five instances in which macroalgal dominance was reversed corroborate the conclusion that macroalgal dominance is not a stable, alternative community state as has been commonly assumed. Fourth, the fact that the loss in regional coral cover and concomitant changes to the benthic community are related to punctuated, discrete events with known causes (i.e. coral disease and bleaching), lends credence to the hypothesis that coral reefs of the Caribbean have been under assault from climate-change-related maladies since the 1970s.},
keywords = {Caribbean Coral Reefs, Coral, coral loss, macroalgal cover, macroalgal dominance, Marine biology},
pubstate = {published},
tppubtype = {article}
}
Caribbean reefs have experienced unprecedented changes in the past four decades. Of great concern is the perceived widespread shift from coral to macroalgal dominance and the question of whether it represents a new, stable equilibrium for coral-reef communities. The primary causes of the shift -- grazing pressure (top-down), nutrient loading (bottom-up) or direct coral mortality (side-in) -- still remain somewhat controversial in the coral reef literature. We have attempted to tease out the relative importance of each of these causes. Four insights emerge from our analysis of an early regional dataset of information on the benthic composition of Caribbean reefs spanning the years 1977–2001. First, although three-quarters of reef sites have experienced coral declines concomitant with macroalgal increases, fewer than 10% of the more than 200 sites studied were dominated by macroalgae in 2001, by even the most conservative definition of dominance. Using relative dominance as the threshold, a total of 49 coral-to-macroalgae shifts were detected. This total represents ∼35% of all sites that were dominated by coral at the start of their monitoring periods. Four shifts (8.2%) occurred because of coral loss with no change in macroalgal cover, 15 (30.6%) occurred because of macroalgal gain without coral loss, and 30 (61.2%) occurred owing to concomitant coral decline and macroalgal increase. Second, the timing of shifts at the regional scale is most consistent with the side-in model of reef degradation, which invokes coral mortality as a precursor to macroalgal takeover, because more shifts occurred after regional coral-mortality events than expected by chance. Third, instantaneous observations taken at the start and end of the time-series for individual sites showed these reefs existed along a continuum of coral and macroalgal cover. The continuous, broadly negative relationship between coral and macroalgal cover suggests that in some cases coral-to-macroalgae phase shifts may be reversed by removing sources of perturbation or restoring critical components such as the herbivorous sea urchin Diadema antillarum to the system. The five instances in which macroalgal dominance was reversed corroborate the conclusion that macroalgal dominance is not a stable, alternative community state as has been commonly assumed. Fourth, the fact that the loss in regional coral cover and concomitant changes to the benthic community are related to punctuated, discrete events with known causes (i.e. coral disease and bleaching), lends credence to the hypothesis that coral reefs of the Caribbean have been under assault from climate-change-related maladies since the 1970s.