Plate 13.1 Photograph of the ocean bottom on an abyssal plain at 2°N, 140°W. The
curving track was made by a sea urchin seen in the foreground. Older tracks and
sundry animal mounds are also visible.
(Photograph by C.R. Smith, from Smith 1996.)
Plate 14.1 Plot of time-series samples from four stations in the upper San Francisco
Bay estuary versus the first two principal components of the benthic macrofauna
composition. PCA-1 is the “virtual” abscissa, PCA-2 the ordinate.
(^) (After Peterson & Vayssières 2010.)