• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Barry Lovelace's Coral Reef Presentation
 

Barry Lovelace's Coral Reef Presentation

on

  • 722 views

Presentation done for Coral Reef and Wetland Education Campaign in Tobago

Presentation done for Coral Reef and Wetland Education Campaign in Tobago

Statistics

Views

Total Views
722
Views on SlideShare
620
Embed Views
102

Actions

Likes
2
Downloads
0
Comments
0

1 Embed 102

http://elearn.usc.edu.tt 102

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Barry Lovelace's Coral Reef Presentation Barry Lovelace's Coral Reef Presentation Presentation Transcript

    • Keeping the Balance RightCoral ReefsCITIES UNDER THE SEAPresented by:Barry Lovelace, MSc.,Environmental Science Educator
    • Coral ReefsOur AmazingVery Rich Biodiversity• Well over 1 million differentkinds of organisms sharesmall space (only 10% Identified)• Cities under the sea• Rainforest of the Sea
    • … are large underwater structures(ridges and mounds) built fromthe calcium carbonate (limestone)deposits of animals (mainly coralpolyps).What are Coral Reefs?
    • Coral Reef in Tobago
    • Coral ReefsOur Amazing
    • Largest brain coral in the WesternHemisphere at Speyside, Tobago
    • Coral ReefsCollage of colourful soft corals
    • Coral ReefsDiving between barrel sponges atSpeyside, Tobago
    • Coral ReefsManta ray at Speyside, Tobago
    • Coral ReefsFeather duster worm, Tobago
    • Coral ReefsYellow tube sponge, Tobago
    • Why areCoral Reefsimportant toT&T?In 2006 the World Resource Institute (WRI) presented theestimates of an economic valuation of several Caribbean reefs,Tobago included.
    • Why are Coral Reefs important?Coral reef-associatedTourism andRecreationContributed $130 million tothe national economy in 2006
    • Divers examine largest brain coral
    • Glass-bottom boat tours
    • Why are Coral Reefs important?Coral reef-associatedFisheriesprovide annual economic benefitsestimated $1.3 million
    • Important source of protein in the Caribbeanparrot fishparrot fishSpanishhogfishgruntsnappergrouper
    • Why are Coral Reefs important?ShorelineProtection Services of CoralReefsavoided erosion and storm damage fromwaves valued $33 million peryear
    • BuccooReefTobago’slargestfringing reefon the way tobecoming asmall barrierreef
    • Why are Coral Reefs important?Tourism and recreationFisheriesShoreline ProtectionUS$ 130US$ 1.3US$ 33US$ 164 MilThese are significant compared to Tobago’s GDP, whichwas US$286 million in 2006.Coral reefs provide other important values not capturedin study (beaches, cultural, pharmaceuticals).
    • Understanding thethreats to coral reefsTemperature 21 to 29ºCSalinity >20pptWater Clarity/Light mostly above 30m asthey require sunlightFirm Base for attachmentWater Movement for food and oxygenOptimum conditions for survival
    • Found worldwide in tropical waters…..….warm, clear shallow water.
    • Coral Polyps build reefs
    • Most coralsconsist of manysmall animals(polyps) livingtogether in alarge group ora colony.Coral Polyps build reefs
    • •Tube-shaped body•SessileThePolypTentacles – capture foodMouth – ingests food; expels wasteGut – digests foodSkeleton (coralite cups) – protectivecalcium carbonate structureSkin – contains zooxanthellae
    • Sunlight(90%)Filter feeding(10%)The Polyp Gets Energy from:
    • Filter feeding nematocystzooplanktonAt night, polyps feed ontiny floating animals (zoo-plankton).They paralyse prey withstinging cells callednematocyst.Tentacles pass food to themouth which then getsdigested in the stomach.Waste is expelled throughmouth.
    • Energy from sunlightInner cellszooxanthellaesunlightCoral polyps retreat intotheir coralite cups duringday.Single-celled plants in skin(zooxanthellae), producefood (sugars) fromsunlight (photosynthesis).
    • Coral Bleaching!!!Inner cellszooxanthellaesunlight•Stress: Temperature rise•Polyp expelszooxanthellae•colony appears brilliantwhite•4 – 6 week of bleaching,corals would starve todeath.
    • SEPTEMBER 2005Bleaching of Fire Corals and Brain Coralsfirst observed!
    • OCTOBER 2005Bleaching spread to most coral species
    • OCTOBER 2005Buccoo Reef Trust and Coral CayConservation Team up to survey main reefsfor severity and extent of bleaching…
    • Method25 Sites were surveyed using PointIntercept TransectReport available at www.buccooreeftrust.org
    • ResultsOverall 66%of hard coralbleached!!At some sites over 85%bleachedReport available at www.buccooreeftrust.org
    • NOVEMBER 2005 -SEPTEMBER 2006Buccoo Reef Trust continue tomonitor reefs for recovery/mortality
    • Method8 stations were established from previoussurvey sites
    • At each station, 20 discrete colonies weretagged, photographed repeatedly, andanalyzed over the period the 10 month period
    • Results66% Bleached colonies:November 2005A Bleached colony
    • ResultsPartial Mortality:32.5%Some areas died: Sept. 2006A Bleached colony: Nov. 2005
    • ResultsNovember 2005A Bleached colony
    • ResultsTotal Mortality:6.6%Sept. 2006A Bleached colony: Nov. 2005
    • How do we dealwith CoralBleaching?Reduce stress fromhuman activities
    • Reef Walking…
    • …prevents small corals…
    • …and boat anchors…
    • …kill live corals.
    • Simple solutions to preventing anchor damage- Install moorings and reef demarcation buoys- Avoid reef walking and contact with corals
    • DrainAlgaeCoralWastewater
    • Runoff from cleared lands results insedimentation of water…Sediment kill reef
    • Introductionwww.buccooreef.orgSediment kill reef
    • Coral reefs are in crisis!!!• Less than 0.2% of ocean isreefs• Reefs are disappearing at analarming rate worldwide.
    • Coral reefs are in crisis!!!• 75% of the worlds coralreefs are currentlythreatened by local andglobal pressures (WRI)
    • Coral reefs are in crisis!!!• Left unchecked, the percentof threatened reefs willincrease to more than 90%by 2030 and to nearly allreefs by 2050
    • EDUCATE SELFwww.BuccooReefTrust.orgwww.Learn.EnvironmentTobago.net
    • SPEAK OUT!!
    • Thank you
    • BuccooReefTobago’slargestfringing reefon the way tobecoming asmall barrierreef