coral bleaching and disease continuecoral bleaching conclusion a guide to coral disease managing...
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South Florida/Caribbean Network I&M Program
Coral bleaching and disease continueto cause extensive mortality on reefs
in US Virgin Islands
Jeff [email protected]
Matt Patterson
Dr. Andrea AtkinsonChris Ringewald
Rob Waara
Dr. Kevin R.T. WhelanBrian Witcher
Alexandra Wright
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South Florida/Caribbean Network I&M Program
Tremendous Collaborative Effort
Caroline Rogers
Erinn Muller
Tony Spitzack
Bane Schill
Jim Murray
Matt Patterson
Zandy Hillis-Starr
Ian Lundgren
My wife -Jude Woodcock
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Last year at this time……
Hurricane Wilma (cat 3) and TS Alpha
South Florida/Caribbean Network I&M Program
Coral Reef Task Force Meeting in Palau
Historically warm seawater temperatures caused extensive coral bleaching
Average Monthly Temperature (at resource depth)
23.0
24.0
25.0
26.0
27.0
28.0
29.0
30.0
31.0
Jan Feb Mar April May June July Aug Sept Oct Nov Dec
Degre
e C
Historical2005
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90%Coral Cover
Bleached
South Florida/Caribbean Network I&M Program
Monitoring 120 transects at 6 reefs sites (~31 acres) at Buck Island Reef NM &
Virgin Islands NP
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Five Months Ago……
South Florida/Caribbean Network I&M Program
Coral Reef Task Force Meeting in DC
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42% loss
23% loss
48% loss
42% loss
28% loss
AVERAGE LOSS
South Florida/Caribbean Network I&M Program
35%
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What we learned from this eventThis “event” is not over – decline continues
South Florida/Caribbean Network I&M Program
0
5
10
15
20
25
30
Oct-04
Sep.05
Oct.05
Nov.05
Dec.05
Jan.06
Feb.06
Mar.06
Apr.06
May.06
Jun.06
Jul.06
% c
over
050100150200250300350400450
sq. c
m.
Coral coverBleached coral cover Mortality from disease
(mean, n=20)
Mennebeck Reef Haulover Reef
0
5
10
15
20
25
30
Jan-05
Sep.05
Oct.05
Nov.05
Dec.05
Jan.06
Feb.06
Mar.06
Apr.06
May.06
Jun.06
Jul.06
% c
over
050100150200250300350400450
sq. c
m.
Coral coverBleached coral cover Mortality from disease
(mean, n=20)
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What we learned from this eventThis “event” is not over – decline continues
South Florida/Caribbean Network I&M Program
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45% loss
49% loss54% loss
42% loss
53% loss
South Florida/Caribbean Network I&M Program
39% loss
AVERAGE LOSS
47%35%
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What we learned from this eventThis was not just a coral bleaching event.
South Florida/Caribbean Network I&M Program
If “just” coral bleaching(=no mortality from disease)……….
much less loss of coral
Small proportion of these colonies died from bleaching
Tony Spitzack USGS following fate of 4153 colonies
Most mortality occurred after coral began to regain color
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What we learned from this eventCoral disease caused majority of coral mortality.
South Florida/Caribbean Network I&M Program
4x – 80x increase in area of mortality from disease
Erinn Muller of USGS monitored 6061 lesions
Mortality from disease STILL above normal
Mortality from disease must be monitoredand
What is “normal” coral disease level for your reef?
# disease lesions “pre”……….17 (range: 8-33)# disease lesions “peak”…....727 (range: 569-1213)
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What we learned from this eventNeed well-designed monitoring program in
place beforebefore event takes place
South Florida/Caribbean Network I&M Program
Knowledge of coral cover trends, and“normal” disease mortality level
Permanent plots/transects
Randomly chosen samples (larger zone of inference)
Multi-zone approach (better coverage)Area of interest (not necessarily entire “park”)
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South Florida/Caribbean Network I&M Program
2005 2006
Disease
Bleaching
What we learned from this eventIncrease monitoring frequency
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Much we still need to learn……What is the mechanism of mortality and
pathogen(s) with coral disease?
South Florida/Caribbean Network I&M Program
Effect on Fishery: Dead reef structure = Live reef structure?
Quality of surviving corals….Ultra-strong? or barely alive?
Fecundity: Where will the future corals come from?
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Socio-economic impact
FY 2005 Economic Benefits of National Parks (Virgin Isl. NP, Buck Isl. NP, C’sted NHP)
South Florida/Caribbean Network I&M Program
Local Jobs Supported………………..…..
Park’s Benefit to Local Areas......incl. spending by visitors in/around parksincl. spending by NPS employees of wages, salaries, benefits
incl. local areas around parksincl. NPS employees spending in areas around parks
~70% of VI economy is derived from tourism. (Source: VI Bureau of Eco. Resh.)
2281
$99,966,000
80% of visitors surveyed listed “visiting the park” primary reason for visiting area.
(source: Report by Jane Israel to Friends-VINP)
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Much we still need to learn……
South Florida/Caribbean Network I&M Program
Effect on Fishery: Will fish be attracted to and use Dead reef structure = Live reef structure?
Socio-economic impact
Effect on Tourism:Will visitors be attracted to and use Dead reef structure = Live reef structure
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Socio-economic impact
Shoreline protection
South Florida/Caribbean Network I&M Program
FishingTourismBiodiversity: ~1,000,000 speciesBio-prospecting:Connectivity: where do future reefs come from?Intrinsic value: what is a healthy reef “worth”?
$3.1 - $4.6 Billion (year-2000; source Reefs at Risk)
Dr. Jennifer Carroll, UVIsource of medicines
- Dive Tourism: $2.1 Billion
- $0.7 to 2.2 Billion- $300 Million
Reefs provide
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South Florida/Caribbean Network I&M Program
October 1997 October 2006
What we’ve learned
Overgrowth by algae
Growth of finger and small plate coral
Bio-erosionKilled by white plague
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Photo by Judd Patterson
South Florida/Caribbean Network I&M Program
Photo by Judd PattersonPhoto by NPSAnimations by Judd Patterson
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South Florida/Caribbean Network I&M Program
1988 Yellowstone Fire Season
Conclusion
Burned about 880,000 acres~1/2 the park25,000 firefighters
$120,000,000 logistical support
RESULT: re-evaluation of NPS Wildland Fire Management
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South Florida/Caribbean Network I&M Program
A Reef Manager’s Guide to Coral Bleaching
ConclusionA Guide to Coral Disease
ManagingRespondingResilienceCauses and Consequences
Now time for….A Manual to Coral Disease
Well managed areas with undeveloped watershedsHigh coral cover, diversity, and complexity sitesShowed little mortality to 1997-98 bleaching
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Dr. Caroline RogersErinn Muller, Tony Spitzack, Bane SchillUS Geological SurveyZandy Hillis-Starr, Ian LundgrenNational Park ServiceDr. Barry Devine, Pedro NievesUniversity of the Virgin Islands
RESPONSE OF ELKHORN CORAL (ACROPORAPALMATA) TO THE 2005 BLEACHING EVENT
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Why is elkhorn coral important?
• Listed as threatened under the ESA (losses from disease and storms)
• Large, complex colonies create the architecture of the reef• Habitat for high diversity of organisms—fishes, sea turtles
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Monthly monitoring of individual elkhorn colonies starting in 2003
460+ individual elkhorncolonies
4 sites within Virgin Islands National Park
Disease, physical damage, other factors that could limit recovery
Photographs of each colony, eachmonth
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Hawksnest
TrunkHaulover
Saltpond
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0%
10%
20%
30%
40%
50%
60%
Did NotBleach
Bleached Bleachedand
Recovered
Bleachedwith Partial
Mortality
Bleachedwith
CompleteMortality
% o
f Col
onie
s (N
=427
)
Response of elkhorn coral from St. John study sitesThe first time elkhorn bleached in the VI
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0
10
20
30
40
50
60
70
80
90
100
Haulover Hawksnest Saltpond Bay Trunk Bay
No Mortality
Partial Mortality
Complete Mortality
FATE OF BLEACHED ELKHORN COLONIES
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Buck Island Reef National Monument, St. Croix USVI
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SUPER-SIZED (“Venti”) ELKHORN COLONIES HARD HIT BY BLEACHING
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Buck Island Reef National Monument, St. Croix USVIBleaching, Mortality, and Recovery – Barrier Reef
Bleaching
• 23/35 colonies (66%) bleached
Mortality
• One-half of the colonies died completely between August 2005 to January 2006
Depth = average 2 m
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Buck Island Reef National Monument, St. Croix USVIBleaching, Mortality, and Recovery – Outside the Barrier Reef
Mortality
• 6 of 76 (8%) of the colonies died completely between August 2005 and January 2006
Bleaching
• 178/289 colonies (62%) bleached
Depth = maximum 10 m
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•Elkhorn coral reefs (< 6m) responded differently than deeper reefs (max. 20 m) dominated by star and brain corals•Elkhorn corals that bleached did NOT begin to recover and then suffer major outbreak of disease•Coral cover losses are continuing on the deeper reefs
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Elkhorn “clones” are created when branches break off and start new colonies—
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Two colonies near each other with the same genotype (clones)—Neither bleached
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Elkhorn reefs which have colonies of many different genotypes (higher diversity) might be more resistant and resilient to bleaching and disease(highlighted in Manager’s Guide to Bleaching)
A SEXUAL RECRUIT (from a larva)
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8/29/2005
TWO SEPARATE, ADJACENT ELKHORN COLONIES
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BleachedNot Bleached
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9/29/2005
11/30/2005
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PRIORITIES FOR RESEARCH• Continue research on coral/zooxanthellae genotypes• Continue research on microbial communities associated with diseased
and healthy corals• Continue research on the basic symbiotic relationship (corals + zoox.=
solar-powered animals)
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Non-destructive method for sampling coralsRecent research by Bane Schill (USGS) indicated different microbes (alphaproteobacteria) associated with healthy and diseased corals—(please see Fact Sheet)
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OTHER RESEARCH/MANAGEMENT PRIORITIES
• Build on existing collaborations to integrate long-term monitoring with field sampling of diseases/lab. analysis (“ecological history”)
• Determine the links between human activities and bleaching/disease (synergy of stressors assaulting reefs)
• Determine the effects of coral losses on fishes and other organisms
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•Consider identifying more RESISTANT and RESILIENT corals and coral reefs for greater protection (“TOUGHER” GENOTYPES)
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ROLE OF NPS MARINE RESERVES (NATIONAL MONUMENTS) AND OTHER MPAS IN REVERSING DEGRADATION
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Currents, gene flow, connectivity
Virgin Islands NationalParks and Monuments
A REGIONAL NOT JUST LOCAL CRISIS
CONNECTIVITY--Where will future corals/fishes come from?
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Support the CDHC as a way to bring a diverse group of scientists and managers together to document aftermath of 2005 event, future events, and “recovery”
Exciting opportunities for collaboration!!
UNIVERSITY
Industry
State Govn’ts& U.S. TerritoriesNon-Profit Research
Foundations
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Acknowledgements
• NOAA, NPS, UVI, USGS, Disney Wildlife Conservation Fund, Dr. Mark Monaco, Master Chris Caldow, Dr. Iliana Baums, many others
• Numerous volunteers