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Title: Distribution of Epifaunal Biomass on a Sublittoral Rock-Reef 
Author: Pequegnat, Willis E.
Date: 1968-01
Publisher: University of Hawai'i Press
Citation: Pequegnat WE. 1968. Distribution of epifaunal biomass on a sublittoral rock-reef. Pac Sci 22(1): 37-40.
Abstract: Previously the author reported on the quantitative
distribution of epifaunal species and individuals
and their zonation on a siltstone reef
located in the open ocean near Corona del Mar,
California (Pequegnat, 1964) . A marked top-to-
bottom reduction in numbers of species and
individuals was observed to exist on this reef,
and these changes were related to a reduction of
wave-induced water movements from the reef's
upper to lower levels. Three observations
pointed to the desirability of determining the
distribution of biomass over the rock-reef:
(1) the populations of some species were
greatest on the reef's lower levels, (2) several
of the largest species with relatively small
numbers of individuals occurred here, and (3)
there appeared to be a shift from a preponderance
of suspension-feeders at the top toward
increasing importance of deposit-feeders and
scavengers at the base.
ISSN: 0030-8870

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