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Title: Coral Gardens Reef, Belize: A refugium in the face of Caribbean-wide Acropora spp. coral decline

Abstract

Caribbean Acropora spp. corals have undergone a decline in cover since the second half of the twentieth century. Loss of these architecturally complex and fast-growing corals has resulted in significant, cascading changes to the character, diversity, and available ecospaces of Caribbean reefs. Few thriving Acropora spp. populations exist today in the Caribbean and western North Atlantic seas, and our limited ability to access data from reefs assessed via long-term monitoring efforts means that reef scientists are challenged to determine resilience and longevity of existing Acropora spp. reefs. Here we used multiple dating methods to measure reef longevity and determine whether Coral Gardens Reef, Belize, is a refuge for Acropora cervicornis against the backdrop of wider Caribbean decline. We used a new genetic-aging technique to identify sample sites, and radiocarbon and high-precision uranium-thorium (U-Th) dating techniques to test whether one of the largest populations of extant A. cervicornis in the western Caribbean is newly established after the 1980s, or represents a longer-lived, stable population. We did so with respect for ethical sampling of a threatened species. Our data show corals ranging in age from 1910 (14C) or 1915 (230Th) to at least November 2019. While we cannot exclude the possibility ofmore » short gaps in the residence of A. cervicornis earlier in the record, the data show consistent and sustained living coral throughout the 1980s and up to at least 2019. We suggest that Coral Gardens has served as a refuge for A. cervicornis and that identifying other, similar sites may be critical to efforts to grow, preserve, conserve, and seed besieged Caribbean reefs.« less

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1];  [3];  [4];  [5];  [6];  [7]
  1. Washington and Lee Univ., Lexington, VA (United States). Geology Dept.
  2. Univ. of Wollongong, NSW (Australia). School of Earth Atmospheric and Life Sciences; Univ. of Queensland, Brisbane, QLD (Australia). School of Earth and Environmental Sciences, Radiogenic Isotope Facility
  3. Washington and Lee Univ., Lexington, VA (United States). Geology Dept.; Dartmouth College, Hanover, NH (United States). Dept. of Earth Sciences
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Center for Accelerator Mass Spectrometry; Univ. of California, Santa Cruz, CA (United States). Ocean Sciences Dept.
  5. Macalester College, St. Paul, MN (United States). Geology Dept.
  6. Univ. of Queensland, Brisbane, QLD (Australia). School of Earth and Environmental Sciences, Radiogenic Isotope Facility
  7. Smith College, Northampton, MA (United States). Geosciences Dept.
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1815640
Grant/Contract Number:  
AC52-07NA27344; 1358987
Resource Type:
Accepted Manuscript
Journal Name:
PLoS ONE
Additional Journal Information:
Journal Volume: 15; Journal Issue: 9; Journal ID: ISSN 1932-6203
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 59 BASIC BIOLOGICAL SCIENCES; Coral reefs; Radioactive carbon dating; Corals; Caribbean; Aragonite; Scanning electron microscopy; Conservation science; Storms

Citation Formats

Greer, Lisa, Clark, Tara, Waggoner, Tanner, Busch, James, Guilderson, Thomas P., Wirth, Karl, Zhao, Jian-xin, and Curran, H. Allen. Coral Gardens Reef, Belize: A refugium in the face of Caribbean-wide Acropora spp. coral decline. United States: N. p., 2020. Web. doi:10.1371/journal.pone.0239267.
Greer, Lisa, Clark, Tara, Waggoner, Tanner, Busch, James, Guilderson, Thomas P., Wirth, Karl, Zhao, Jian-xin, & Curran, H. Allen. Coral Gardens Reef, Belize: A refugium in the face of Caribbean-wide Acropora spp. coral decline. United States. https://doi.org/10.1371/journal.pone.0239267
Greer, Lisa, Clark, Tara, Waggoner, Tanner, Busch, James, Guilderson, Thomas P., Wirth, Karl, Zhao, Jian-xin, and Curran, H. Allen. Wed . "Coral Gardens Reef, Belize: A refugium in the face of Caribbean-wide Acropora spp. coral decline". United States. https://doi.org/10.1371/journal.pone.0239267. https://www.osti.gov/servlets/purl/1815640.
@article{osti_1815640,
title = {Coral Gardens Reef, Belize: A refugium in the face of Caribbean-wide Acropora spp. coral decline},
author = {Greer, Lisa and Clark, Tara and Waggoner, Tanner and Busch, James and Guilderson, Thomas P. and Wirth, Karl and Zhao, Jian-xin and Curran, H. Allen},
abstractNote = {Caribbean Acropora spp. corals have undergone a decline in cover since the second half of the twentieth century. Loss of these architecturally complex and fast-growing corals has resulted in significant, cascading changes to the character, diversity, and available ecospaces of Caribbean reefs. Few thriving Acropora spp. populations exist today in the Caribbean and western North Atlantic seas, and our limited ability to access data from reefs assessed via long-term monitoring efforts means that reef scientists are challenged to determine resilience and longevity of existing Acropora spp. reefs. Here we used multiple dating methods to measure reef longevity and determine whether Coral Gardens Reef, Belize, is a refuge for Acropora cervicornis against the backdrop of wider Caribbean decline. We used a new genetic-aging technique to identify sample sites, and radiocarbon and high-precision uranium-thorium (U-Th) dating techniques to test whether one of the largest populations of extant A. cervicornis in the western Caribbean is newly established after the 1980s, or represents a longer-lived, stable population. We did so with respect for ethical sampling of a threatened species. Our data show corals ranging in age from 1910 (14C) or 1915 (230Th) to at least November 2019. While we cannot exclude the possibility of short gaps in the residence of A. cervicornis earlier in the record, the data show consistent and sustained living coral throughout the 1980s and up to at least 2019. We suggest that Coral Gardens has served as a refuge for A. cervicornis and that identifying other, similar sites may be critical to efforts to grow, preserve, conserve, and seed besieged Caribbean reefs.},
doi = {10.1371/journal.pone.0239267},
journal = {PLoS ONE},
number = 9,
volume = 15,
place = {United States},
year = {Wed Sep 30 00:00:00 EDT 2020},
month = {Wed Sep 30 00:00:00 EDT 2020}
}

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