CO2 Science

Growth Relative to Growth at Current pH
Macroalgae

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 4 1 10 7 21

Number of Organisms 1 1 4 4 8

Arithmetic Mean 1.60 0.90 1.26 1.00 1.42

Standard Error 0.00 0.00 0.12 0.15 0.23

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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.

Chara aspera [Rough Stonewort] 2 1.23 0.12
Chara horrida [Bristly Stonewort] 2 1.28 0.12
Chara tomentosa [Coral Stonewort] 2 1.46 0.01
Chondrus crispus [Irish Moss] 1 1.06 0.00 2 1.03 0.01
Corallina officinalis [Calcareous Red Seaweed] 1 0.56 0.00 1 0.69 0.00
Gracilaria lemaneiformis [Red Seaweed] 2 1.47 0.2
Hypnea spinella [Red Seaweed] 4 1.60 0.09
Lithophyllum cabiochae [Mediterranean Crustose Coralline Alga] 1 0.90 0.00 3 0.99 0.14
Lomentaria articulata [A Red Seaweed] 4 1.5 0.1 4 1.36 0.2
Macrocystis pyrifera [Giant Kelp] 2 1.03 0.11
Nereocystis luetkeana [Bull Kelp] 4 2.8 0.9
Porphyra yezoensis [Nori, Red Algae] 2 1.36 0 2 1.88 0
Saccharina latissima [Sugar Kelp] 4 0.65 0.1