Monitoring Global Change in Monitoring Global Change in Temperate Reef Communities Temperate Reef Communities • Larry Deysher – Ocean Imaging • Matt Edwards – San Diego State University • Jon Dykstra – Earth Satellite Corporation • Paul Dayton – Scripps Institution of Oceanography
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Monitoring Global Change in Temperate Reef Communities
Monitoring Global Change in Temperate Reef Communities. Larry Deysher – Ocean Imaging Matt Edwards – San Diego State University Jon Dykstra – Earth Satellite Corporation Paul Dayton – Scripps Institution of Oceanography. Project Objectives. - PowerPoint PPT Presentation
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Monitoring Global Change in Monitoring Global Change in Temperate Reef CommunitiesTemperate Reef Communities
• Larry Deysher – Ocean Imaging• Matt Edwards – San Diego State University• Jon Dykstra – Earth Satellite Corporation• Paul Dayton – Scripps Institution of Oceanography
Project ObjectivesProject Objectives
• Cost-effective method of mapping kelp canopies on a global basis
• Baseline for global kelp distributions (Year 2000)• Model linking kelp distributions with physical
factors such as temperature & wave heights• Discriminate localized kelp bed changes from
climate related effects
Kelp Habitat StructureKelp Habitat Structure
Half–life 2 to 4 years Half–life 10’s to 100’s years
Photos: Mark Carr & Bill Bushing
MacrocystisMacrocystis
NereocystisNereocystis
Alaria fistulosaAlaria fistulosa
Ecklonia maximaEcklonia maxima
Photo: Taurus Products
Durvillaea antarcticaDurvillaea antarctica
Photo: Steve Smith,
NMSC
Year 2000 ETM+ CoverageYear 2000 ETM+ Coverage
Southern California Kelp CanopiesSouthern California Kelp Canopies
ETM+ - 49 haColor IR Photo - 39
ha
San Diego Regional Water Quality Control Board
Study AreaStudy Area
ETM+ 4 Aug 2002ETM+ 4 Aug 2002
Canopy Area (ha)
Bed DMSC ETM+
Harvest 4.9 8.0
Control 1 0.5 0.9
Control 2 2.3 3.4
Control 3 9.0 11.1
Range BoundariesRange Boundaries• Baja California• Peru / Chile & Argentina• Namibia / South Africa• Australia – Tasmanian
population declines• Subantarctic Islands
– Kerguelen Island– Heard Island– South Georgia Island
Peru / Chile / Argentina
Northern Boundaries
Peru – 13.8o SPeru Coastal Current (Humboldt)
Argentina – 42.0o SBrazil-Malvinas Confluence
Namibia / South Africa
Northern Boundary – 21.5o SBenguela Current
Eastern Boundary – 19.6o E Agulhas Current
Subantarctic Subantarctic IslandsIslands
Kelp on islands north of Antarctic Convergence
with the exception of South Georgia Island
SST - South Georgia IslandSST - South Georgia IslandApril 1998 October 1998