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Abundance and Horizontal Distribution of Meiofauna on a Northern California Beach

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Title:Abundance and Horizontal Distribution of Meiofauna on a Northern California Beach
Authors:Hooge, Matthew D.
Date Issued:Jul 1999
Publisher:University of Hawai'i Press
Citation:Hooge MD. 1999. Abundance and horizontal distribution of meiofauna on a northern California Beach. Pac Sci 53(3): 305-315.
Abstract:Distribution and abundance of meiofauna on a sandy beach in
Big Lagoon, California, were studied during a 3-week period in the summer of
1996. Sediment cores were taken to a depth of 10 em at three tidal levels. In
addition to quantitative counts of meiofauna, exposure to air, percentage water
content, and grain size composition were determined f-or each sample. Results
of Spearman rank correlations revealed that median grain size, percentage exposure
to air, and sediment saturation were strongly correlated to differences in
meiofauna abundance at the mid and low water stations. Mean meiofauna
abundance was 779 individuals per 100 cm3 of sand. Nematodes and oligochaetes
made up approximately 80% of the mean abundance at the midwater
stations. Although polychaetes accounted for approximately 70% of the mean
total meiofauna at the low water stations, the most numerically dominant
group varied on different sampling days and included polychaetes, gastrotrichs,
turbellarians, and nematodes. New distributional records for Northern California
include Nematoplana nigrocapitula (Turbellaria, Proseriata), Turbanella
mustela (Gastrotricha, Macrodasyida), and Microcerberus abbotti (Isopoda,
Appears in Collections: Pacific Science Volume 53, Number 3, 1999

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