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Spectra obtained from airborne inaging spectrometers are similar to lab measures of individual kelp blade reflectances:. NDVI can provide optical estimates of kelp abundance. Macrocystis pyrifera (giant kelp) NPP = 14.7 x Standing Crop.

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Presentation Transcript
slide1
Spectra obtained from airborne inaging spectrometers are similar to lab measures of individual kelp blade reflectances:

NDVI can provide optical estimates of kelpabundance

ERF 2007 International Conference

Providence, RI

slide2

Macrocystis pyrifera (giant kelp)

NPP = 14.7 x Standing Crop

  • Converting NDVI into absolute kelp abundance and productivity:
  • Optical BAI = NDVI/0.71
  • True BAI = Optical BAI * 9.04
  • Biomass = True BAI/13.3
  • Productivity = Biomass * 14.7

ERF 2007 International Conference

Providence, RI

slide3

Carmel Bay

Santa Barbara Coastal LTER

ERF 2007 International Conference

Providence, RI

ndvi derived density and productivity of giant kelp carmel bay november 2004

Kelp Density

(Kg DW m-2)

0.54 – 0.61

0.62 - 0.68

0.69 – 0.75

0.75 – 0.82

0.83 – 0.88

0.89 – 0.95

Kelp Productivity

(g DW m-2 d-1)

8 – 9

9.1 – 10

10.1 – 11

11.1 – 12

12.1 – 13

13.1 - 14

NDVI Derived Density and Productivity of Giant Kelp: Carmel Bay November 2004
  • 15 Km of irregular coastline
  • 1.7 Km2 of kelp canopy
  • Biomass: 1400 metric tons dry kelp biomass
  • NPP: 19 metric tons dry biomass d-1

ERF 2007 International Conference

Providence, RI