Percent recent mortality (PRM) of stony corals as an ecological indicator of coral reef condition

Diego Lirman, N. Formel, S. Schopmeyer, Jerald S Ault, S. G. Smith, D. Gilliam, B. Riegl

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The reef communities of the Florida coral reef tract play a major role in supporting the regional economy but are threatened by increased exploitation and environmental factors. Coral reef ecosystem services are vital to the economy of SE Florida where revenue and jobs depend on the status of reef resources. Here, we used an extensive, reef monitoring database collected by the Florida Reef Resilience (FRRP, 2003-2011) and the Atlantic and Gulf Rapid Reef Assessment (AGRRA, 1997-2011) programs to evaluate percent recent mortality (PRM) as a robust ecological indicator of coral colony and coral reef status. PRM, the proportion of a coral colony that has experienced recent tissue mortality so that corallite structures in the non-living parts of the coral are still intact and identifiable to species, can be attributed to disturbances taking place within days to a few months preceding the surveys. Based on data from >50,000 colonies from 11 coral species and nearly 1400 sites, we propose a benchmark level of <1% PRM and <5% prevalence of partial mortality for Florida reefs during periods of background, low-stress environmental conditions. PRM levels >1.0% and prevalence levels >5% can be used as early warning indicators of degrading conditions. Average PRM values >2% are indicative of increasingly stressful conditions as those experienced during temperature anomalies and major hurricanes. Finally, PRM values considerably >2% are reflective of significantly stressful conditions and warning signals of potential major coral mortality as evidenced by mean PRM levels of >10% recorded in Florida as a consequence of the 2010 extreme cold-water event. PRM and prevalence values from Florida reefs compared favorably with those recorded in the Caribbean and the Mesoamerican region where a benchmark of 2% for background levels of PRM under low-level, chronic stress was proposed. The status of this indicator can be easily communicated to stakeholders and will benefit managers by providing: (1) a baseline to assess the status of coral populations; and (2) early-warning indicators of unfavorable conditions that may trigger management actions such as temporary closures or the establishment of more permanent protection such as MPAs.

Original languageEnglish
Pages (from-to)120-127
Number of pages8
JournalEcological Indicators
Volume44
DOIs
StatePublished - Jan 1 2014

Fingerprint

coral reefs
coral reef
coral
mortality
corals
reefs
reef
indicator
Scleractinia
Coral reefs
Mortality
regional economy
hurricanes
background level
cold water
ecosystem service
ecosystem services
temperature anomaly
stakeholders
hurricane

Keywords

  • Caribbean
  • Coral indicators
  • Florida reefs
  • Partial mortality

ASJC Scopus subject areas

  • Ecology
  • Decision Sciences(all)
  • Ecology, Evolution, Behavior and Systematics

Cite this

Percent recent mortality (PRM) of stony corals as an ecological indicator of coral reef condition. / Lirman, Diego; Formel, N.; Schopmeyer, S.; Ault, Jerald S; Smith, S. G.; Gilliam, D.; Riegl, B.

In: Ecological Indicators, Vol. 44, 01.01.2014, p. 120-127.

Research output: Contribution to journalArticle

Lirman, Diego ; Formel, N. ; Schopmeyer, S. ; Ault, Jerald S ; Smith, S. G. ; Gilliam, D. ; Riegl, B. / Percent recent mortality (PRM) of stony corals as an ecological indicator of coral reef condition. In: Ecological Indicators. 2014 ; Vol. 44. pp. 120-127.
@article{a892bf5704e348c5b315369908bdd364,
title = "Percent recent mortality (PRM) of stony corals as an ecological indicator of coral reef condition",
abstract = "The reef communities of the Florida coral reef tract play a major role in supporting the regional economy but are threatened by increased exploitation and environmental factors. Coral reef ecosystem services are vital to the economy of SE Florida where revenue and jobs depend on the status of reef resources. Here, we used an extensive, reef monitoring database collected by the Florida Reef Resilience (FRRP, 2003-2011) and the Atlantic and Gulf Rapid Reef Assessment (AGRRA, 1997-2011) programs to evaluate percent recent mortality (PRM) as a robust ecological indicator of coral colony and coral reef status. PRM, the proportion of a coral colony that has experienced recent tissue mortality so that corallite structures in the non-living parts of the coral are still intact and identifiable to species, can be attributed to disturbances taking place within days to a few months preceding the surveys. Based on data from >50,000 colonies from 11 coral species and nearly 1400 sites, we propose a benchmark level of <1{\%} PRM and <5{\%} prevalence of partial mortality for Florida reefs during periods of background, low-stress environmental conditions. PRM levels >1.0{\%} and prevalence levels >5{\%} can be used as early warning indicators of degrading conditions. Average PRM values >2{\%} are indicative of increasingly stressful conditions as those experienced during temperature anomalies and major hurricanes. Finally, PRM values considerably >2{\%} are reflective of significantly stressful conditions and warning signals of potential major coral mortality as evidenced by mean PRM levels of >10{\%} recorded in Florida as a consequence of the 2010 extreme cold-water event. PRM and prevalence values from Florida reefs compared favorably with those recorded in the Caribbean and the Mesoamerican region where a benchmark of 2{\%} for background levels of PRM under low-level, chronic stress was proposed. The status of this indicator can be easily communicated to stakeholders and will benefit managers by providing: (1) a baseline to assess the status of coral populations; and (2) early-warning indicators of unfavorable conditions that may trigger management actions such as temporary closures or the establishment of more permanent protection such as MPAs.",
keywords = "Caribbean, Coral indicators, Florida reefs, Partial mortality",
author = "Diego Lirman and N. Formel and S. Schopmeyer and Ault, {Jerald S} and Smith, {S. G.} and D. Gilliam and B. Riegl",
year = "2014",
month = "1",
day = "1",
doi = "10.1016/j.ecolind.2013.10.021",
language = "English",
volume = "44",
pages = "120--127",
journal = "Ecological Indicators",
issn = "1470-160X",
publisher = "Elsevier",

}

TY - JOUR

T1 - Percent recent mortality (PRM) of stony corals as an ecological indicator of coral reef condition

AU - Lirman, Diego

AU - Formel, N.

AU - Schopmeyer, S.

AU - Ault, Jerald S

AU - Smith, S. G.

AU - Gilliam, D.

AU - Riegl, B.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The reef communities of the Florida coral reef tract play a major role in supporting the regional economy but are threatened by increased exploitation and environmental factors. Coral reef ecosystem services are vital to the economy of SE Florida where revenue and jobs depend on the status of reef resources. Here, we used an extensive, reef monitoring database collected by the Florida Reef Resilience (FRRP, 2003-2011) and the Atlantic and Gulf Rapid Reef Assessment (AGRRA, 1997-2011) programs to evaluate percent recent mortality (PRM) as a robust ecological indicator of coral colony and coral reef status. PRM, the proportion of a coral colony that has experienced recent tissue mortality so that corallite structures in the non-living parts of the coral are still intact and identifiable to species, can be attributed to disturbances taking place within days to a few months preceding the surveys. Based on data from >50,000 colonies from 11 coral species and nearly 1400 sites, we propose a benchmark level of <1% PRM and <5% prevalence of partial mortality for Florida reefs during periods of background, low-stress environmental conditions. PRM levels >1.0% and prevalence levels >5% can be used as early warning indicators of degrading conditions. Average PRM values >2% are indicative of increasingly stressful conditions as those experienced during temperature anomalies and major hurricanes. Finally, PRM values considerably >2% are reflective of significantly stressful conditions and warning signals of potential major coral mortality as evidenced by mean PRM levels of >10% recorded in Florida as a consequence of the 2010 extreme cold-water event. PRM and prevalence values from Florida reefs compared favorably with those recorded in the Caribbean and the Mesoamerican region where a benchmark of 2% for background levels of PRM under low-level, chronic stress was proposed. The status of this indicator can be easily communicated to stakeholders and will benefit managers by providing: (1) a baseline to assess the status of coral populations; and (2) early-warning indicators of unfavorable conditions that may trigger management actions such as temporary closures or the establishment of more permanent protection such as MPAs.

AB - The reef communities of the Florida coral reef tract play a major role in supporting the regional economy but are threatened by increased exploitation and environmental factors. Coral reef ecosystem services are vital to the economy of SE Florida where revenue and jobs depend on the status of reef resources. Here, we used an extensive, reef monitoring database collected by the Florida Reef Resilience (FRRP, 2003-2011) and the Atlantic and Gulf Rapid Reef Assessment (AGRRA, 1997-2011) programs to evaluate percent recent mortality (PRM) as a robust ecological indicator of coral colony and coral reef status. PRM, the proportion of a coral colony that has experienced recent tissue mortality so that corallite structures in the non-living parts of the coral are still intact and identifiable to species, can be attributed to disturbances taking place within days to a few months preceding the surveys. Based on data from >50,000 colonies from 11 coral species and nearly 1400 sites, we propose a benchmark level of <1% PRM and <5% prevalence of partial mortality for Florida reefs during periods of background, low-stress environmental conditions. PRM levels >1.0% and prevalence levels >5% can be used as early warning indicators of degrading conditions. Average PRM values >2% are indicative of increasingly stressful conditions as those experienced during temperature anomalies and major hurricanes. Finally, PRM values considerably >2% are reflective of significantly stressful conditions and warning signals of potential major coral mortality as evidenced by mean PRM levels of >10% recorded in Florida as a consequence of the 2010 extreme cold-water event. PRM and prevalence values from Florida reefs compared favorably with those recorded in the Caribbean and the Mesoamerican region where a benchmark of 2% for background levels of PRM under low-level, chronic stress was proposed. The status of this indicator can be easily communicated to stakeholders and will benefit managers by providing: (1) a baseline to assess the status of coral populations; and (2) early-warning indicators of unfavorable conditions that may trigger management actions such as temporary closures or the establishment of more permanent protection such as MPAs.

KW - Caribbean

KW - Coral indicators

KW - Florida reefs

KW - Partial mortality

UR - http://www.scopus.com/inward/record.url?scp=84904764834&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84904764834&partnerID=8YFLogxK

U2 - 10.1016/j.ecolind.2013.10.021

DO - 10.1016/j.ecolind.2013.10.021

M3 - Article

VL - 44

SP - 120

EP - 127

JO - Ecological Indicators

JF - Ecological Indicators

SN - 1470-160X

ER -