- Ocean variability represented by the analysed data and preferences
of planktic foraminifera for parameters describing the physical
environment in the North Atlantic and the Indian Oceans. See
Fig. 41 for definitions of range, suboptimum, and optimum. N
samples: number of samples; occurrences: number of occurrences
of a species in the sample set; Ocean Variability: minima, maxima,
and range of physical parameters in the data set; depth (m):
ocean depth at sample site; W: winter; S: summer; 0 m: at sea
surface; 200 m: 200 m depth below surface; SST: sea surface temperature;
T: temperature; season.: seasonality (summer value minus winter
value); Sal: salinity ( PSS); density: water density (kg/m3);
T grad. (0-200 m): vertical temperature gradient (SST minus (T
200 m)); Sal grad. (0-200 m): vertical salinity gradient (Sal
(0 m) minus Sal (200 m)); Stratification: vertical water density
contrast (density (0 m) minus density (200 m); range (min), range
(max): minimum or maximum value along biogeographic range of
species; range width: variance of parameter; 50% (min), 50% (max):
minimum or maximum value of parameter in interval >50% of
maximum relative abundance of species; 50% (width): variance
of parameter; optimum (min), optimum (max): minimum or maximum
value of parameter in interval >75% of maximum relative abundance
of species; optimum (width): variance of parameter. Optima of
species are often not well covered by data and should be used
with caution (compare figures in this paper).
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