Limnology and Oceanography
Deepened isotherms associated with El Niño resulted in severe nutrient limitation and very low kelp productivity during the last half of 1983. Frond growth rates were so low that terminal blades formed before reaching the surface, eliminating the canopy. Frond initiation rates were also extremely low, resulting in significant reductions in mean plant size. Plants growing above 10m were more severely affected than plants at 20m. Nutrient pulses associated with internal waves are thus critical for survival of Macrocystis pyrifera in nutritionally marginal habitats in Southern California.
Original Publication Citation
Zimmerman, R.C., & Robertson, D.L. (1985). Effects of El Niño on local hydrography and growth of the giant kelp, Macrocystis pyrifera, at Santa Catalina Island, California. Limnology and Oceanography, 30(6), 1298-1302. doi: 10.4319/lo.1918.104.22.1688
Zimmerman, Richard C. and Robertson, Deborah L., "Effects of El Nino on Local Hydrography and Growth of the Giant Kelp, Macrocystis Pyrifera, at Santa Catalina Island, California" (1985). OEAS Faculty Publications. 108.