Results of AGRRA Surveys of Twenty Western Atlantic Reef Areas

Results of AGRRA Surveys of Twenty Western Atlantic Reef AreasCompiled by Philip Kramer, Robert Ginsburg and Judith Lang

from the assessments of AGRRA teams

Rosenstiel School of Marine and Atmospheric Science, University of Miami

Ocean Research and Education Foundation

Atlantic and Gulf Rapid Reef AssessmentAtlantic and Gulf Rapid Reef Assessment

(AGRRA)(AGRRA)

• Develop a regional scale of reef condition

• Identify end member reefs in serious decline and candidates for protection

•Provide region-wide comparative data

• Map spatial patterns of reef condition

•Identify reefs for monitoring programs or marine protected areas

A tla ntic a n d G ulf R a p id R ee f A sse ssm ent(A G R R A )

P R O T O C O L

(1) Corals:10m line transects

Partial coral mortality

Colony size distribution

Identify incidences of bleaching and disease

Coral cover

(2) Algae:

25cm2 quadrats

Relative abundance of macro, turf, coralline

Macroalgal height

Diadema surveys

(3) Fishes:

30m x 2m belt transects

Abundance and size of key species

Commerically significant(groupers, snappers)

Important grazers (parrotfish blue tangs)

Indicator species (damselfish)

REEF Rover Diver census

Species diversity of all species

O p tion a l C om p o n en ts eas ily a d d edCoral recruitment; Herbivory (fish bites); Video transects

AGRRA Sampling effort

Coral Cover by Country

Bahamas Belize CaymanIslands

Cuba Jamaica Turks &Caicos

Coral Cover by CountryCoral Cover by Country

Coral indicator norms

Coral indicator norms cont.

Coral size frequency and mortality

Reef fish abundance and biomass norms

Preliminary health index based on 13 AGRRA indicators

Preliminary ConclusionsCoral cover:• A regional average (n = 20) of 21% BUT• Wide regional variations• Remote reefs reefs near centers of population

Montastraea annularis Complex• Reef structure; habitat for fish and conch/lobster• Increased diseases and bleaching

Elevated SSTs of 1998 ENSO:• Bleaching-induced mortality• Increased coral diseases

Preliminary Conclusions

Indicator of regional overfishing • Low sightings (~<1/100m2) of large-bodied groupers

and snappers

Complex controls on regional reef condition• Environment, biogeography, history• Natural and anthropogenic impacts

A. palmata “Shangri-La”, Cuba’s south coast

Widespread resheeting of A. palmata colonies

n= 650 reefs average = 21%

AGRRA program results

High variability across the region

AGRRA has become a widely accepted tool for assessing and monitoring for MPA’s

Results of AGRRA Surveys of Twenty Western Atlantic Reef Areas

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