Geoscience Reference
In-Depth Information
Species
CO
2
(g) (ppmv);
CO
2
(μatm); pH; Ω; [CO
3
p
Other
variables/
comments
Duration
Observed effect(s)
Ref.
2-
]
(μmol kg
-1
)
Pocillopora damicornis
p CO
2
: 414; 670 (midday)
268 days
No signii cant difference in recruitment.
[34]
pH
NBS
: 8.17; 7.97
Ω
a
: 2.91; 1.95
Pocillopora meandrina
p CO
2
: 395; 720
Temperature
14 days
Calcii cation was not signii cantly affected by CO
2
or T although a signii cant
positive interaction was observed between these parameters. Dark adapted
maximum quantum yield of photosystem II was unaffected at all treatments.
[56]
pH
NBS
: 8.18; 7.80
Ω
a
: 3.8; 2.0
Porites asteroides
p H
SWS
: 7.95-7.99; 7.88-7.91;
7.80-7.82
1 month
No signii cant effect on larval settlement. Reduction in skeletal extension by
50% and 78% in the intermediate and high-CO
2
treatments, respectively.
[2]
Ω
a
: 3.1-3.2; 2.61-2.62;
2.2-2.23
Porites compressa
p CO
2
: 186; 440
Light
6 weeks
Calcii cation rate increased with increasing light and Ω
a
.
[49]
pH
SWS
: 8.31; 7.97
Ω
a
: 5.05; 2.48
Porites compressa
p CO
2
: 186; 336; 641
Light (depth)
30 weeks
Calcii cation rate decreased as a function of decreasing Ω
a
, but also as
a function of increasing depth, i.e. lower light level.
[49]
pH
SWS
: 8.31; 8.08; 7.82
Ω
a
: 5.05; 3.64; 2.25
Porites compressa
p CO
2
: 757; 3982
Nutrients
5 weeks
Calcii cation rate in the low-pH treatment was half the rate observed in
the high-pH treatment. Calcii cation rates of corals exposed to low pH
recovered to normal rates after 2 days in ambient seawater.
[47]
pH
NBS
: 7.96; 7.17
Ω
a
: 1.81; 0.28
Calcii cation (wt% month
-
1
) and net productivity decreased as a function of
decreasing pH under ambient T. Intermediate CO
2
and 3ºC warming caused
an increase in calcii cation. High T and CO
2
led to a maximum of 20%
bleaching.
[3]
Porites lobata
p CO
2
: 130-465; 520-705;
1010-1360
Temperature
8 weeks
pH
SWS
: 8.0-8.4; 7.85-7.95;
7.60-7.70
Ω
a
: 3.3-7.1; 2.5-3.5; 1.5-2.2
Porites lutea
p H
NBS
: ~8.6; ~8.4; ~8.2; ~7.9
3-6 h
Positive linear correlation between coral calcii cation rate and Ω
a
. Evidence
of positive nighttime calcii cation was observed at ~Ω
a
> 4.
[59]
Ω
a
: 7.2; 5.5; 3.6; 1.6
Porites lutea
p CO
2
: 226; 399; 887
Positive linear correlation between rate of calcii cation and seawater Ω
a
.
[30]
pH
NBS
: 8.417; 8.207; 7.855
Ω
a
: ~5.18; ~3.43; ~1.56
Porites porites
p CO
2
: 461; 605
Nutrients
32 days
Addition of 2 mM bicarbonate caused an approximate doubling of seawater
C
T
and A
T
and also a doubling of the calcii cation rate. Addition of nitrate
or ammonium caused a signii cant reduction in coral growth.
[48]
pH
U
: 8.1; 8.27
[CO
3
2-
]: 153; 442
Porites rus
p CO
2
: 395; 720
Temperature
14 days
Calcii cation was reduced by 70% at high CO
2
and low T (27°C), but was
unaffected by CO
2
at high T (29°C). Dark adapted maximum quantum
yield of photosystem II was unaffected at all treatments.
[56]
pH
NBS
: 8.18; 7.80
Ω
a
: 3.8; 2.0
