Disaster, Catastrophe, and Local Persistence of the Sea Palm Postelsia palmaeformis

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Science  17 Aug 1979:
Vol. 205, Issue 4407, pp. 685-687
DOI: 10.1126/science.205.4407.685


Two components of natural disturbance, its local intensity and frequency beyond a threshold level, limit a marine benthic alga to wave-swept shores. Transplant experiments indicate that the limited distribution is not due to physiological restriction. Instead, it requires predictable annual disturbance of moderate intensity for local persistence.