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Monitoring Global Change in Temperate Reef Communities Larry Deysher – Ocean Imaging Matt Edwards – San Diego State University Jon Dykstra – Earth Satellite.

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Presentation on theme: "Monitoring Global Change in Temperate Reef Communities Larry Deysher – Ocean Imaging Matt Edwards – San Diego State University Jon Dykstra – Earth Satellite."— Presentation transcript:

1 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

2 Project 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

3 Kelp Habitat Structure Half–life 2 to 4 yearsHalf–life 10’s to 100’s years Photos: Mark Carr & Bill Bushing

4 Macrocystis

5 Nereocystis

6 Alaria fistulosa

7 Ecklonia maxima Photo: Taurus Products

8 Durvillaea antarctica Photo: Steve Smith, NMSC

9 Year 2000 ETM+ Coverage

10 Southern California Kelp Canopies

11 ETM+ - 49 haColor IR Photo - 39 ha San Diego Regional Water Quality Control Board

12 Study Area

13

14 ETM+ 4 Aug 2002

15 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

16 Range Boundaries Baja California Peru / Chile & Argentina Namibia / South Africa Australia – Tasmanian population declines Subantarctic Islands –Kerguelen Island –Heard Island –South Georgia Island

17 Peru / Chile / Argentina Northern Boundaries Peru – 13.8 o S Peru Coastal Current (Humboldt) Argentina – 42.0 o S Brazil-Malvinas Confluence

18 Namibia / South Africa Northern Boundary – 21.5 o S Benguela Current Eastern Boundary – 19.6 o E Agulhas Current

19 Subantarctic Islands Kelp on islands north of Antarctic Convergence with the exception of South Georgia Island

20 SST - South Georgia Island April 1998October 1998

21 SST - Kerguelen & Heard April 1998October 1998 Heard Kerguelen

22 SST Anomaly - Kerguelen & Heard April 1998October 1998 Heard Kerguelen

23 Coastal Water Clarity Turbidity plumes Plankton blooms MODIS Satellite imagery Spatial Resolution 250 m (bands 1 - 2) 500 m (bands 3 - 7) 1000 m (bands 8 - 36)

24 LaJolla Kelp Offshore Expansion

25 Ozone Hole October 2000 (< 200 Dobson Units ) NASA TOMS

26 Isla de los Estados I 30 January 2001

27 Data Availability ftp://samoa.gsfc.nasa.gov/landsat/kelp/

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