CO2 Science

Calcification Relative to Calcification at Current pH
Echinoderms

Statistics

Decline in pH from the Present

0.0 to 0.09 0.09 to 0.17 0.17 to 0.3 0.3 to 0.5 More than 0.5

Number of Results 0 2 7 5 11

Number of Organisms 0 2 5 3 5

Arithmetic Mean 0.00 2.72 1.76 0.98 1.25

Standard Error 0.00 1.47 0.78 0.06 0.52

Click on the links below to expand the data. For a description of this page click here.

Decline in pH from the Present

0.0 to 0.09 0.09 to 0.17 0.17 to 0.3 0.3 to 0.5 More than 0.5

Organism Name No. Mean Std.
Err. No. Mean Std.
Err. No. Mean Std.
Err. No. Mean Std.
Err. No. Mean Std.
Err.

Arbacia punctulata [Purple Urchin] 1 4.80 0.00 1 5.22 0.00 1 3.48 0.00
Eucidaris tribuloides [Pencil Urchin] 1 0.64 0 1 0.64 0 1 0 0
Ophiura ophiura [Serpent Star] 2 0.98 0.08 2 1.09 0.04 4 0.98 0.06
Paracentrotus lividus [Purple Sea Urchin] 1 1.00 0.00 1 1.00 0.00 3 1.00 0.00
Pisaster ochraceus [Purple Sea Star] 2 0.95 0.1
Tripneustes gratilla [Collector Urchin] 2 0.85 0.02 2 0.81 0.00