Environmental Engineering Reference
In-Depth Information
TABLE 1
Modern Rates of Bioerosion (Grazing and Boring) from Experimental Substrates under a Variety of Environmental Conditions
Net rates of
bioerosion
(grazing
Rates of
calcification
on reef kg
CaCO
3
m
2
a
1
Rates of
microboring
kg CaCO
3
m
2
a
1
boring)
Rates of
macroboring
kg CaCO
3
m
2
a
1
þ
Environmental
conditions
accretion kg
CaCO
3
m
2
a
1
Rates of grazing
kg CaCO
3
m
2
a
1
Exposure
duration
Location
Comments
Substrate
References
Pristine
Lizard Islands,
Great Barrier
Reef
1.459
0.679
1.145
0.518
0.391
0.277
0.75
0.03
3.7-4.6
Estimated for
windward
margin
Marine park, good
populations of
grazing fish, and
limited echinoids
48 months
Blocks of
Porites
Osorno et al.
(2005)
and
Kinsey (1979)
Pristine
Osprey,
Coral Sea
4.918
0.078
4.886
1.995
0.154
1.34
0.74
Open ocean, good
populations of
grazing fish, limited
echinoids
48 months
Blocks of
Porites
Osorno et al.
(2005)
Lagoonal,
limited flushing
Tikehau,
French
Polynesia
2.74
0.79
1.95
0.58
0.78
0.27
No echinoids,
medium scarids
5 years
Blocks of
Porites
Pari et al. (2002)
Closed lagoon
Takapoto,
French
Polynesia
1.70
0.54
3.16
0.38
0.7
0.11
No echinoids,
medium scarids
5 years
Blocks of
Porites
Pari et al. (2002)
High sediment
loads
Snapper-
entrance to
Daintree River,
North
Queensland
1.590
0.773
0.590
0.188
1.075
0.659
48 months
Blocks of
Porites
Major bleaching
event, mortality
of 50% corals
Uva Island,
Panama
15.4
N/A
N/A
Includes echinoid
and fish,
grazers
85, 282,
419, 655,
702, and
938 days
Cores of
Porites
Eakin (1992)
>
internal
borers, after severe
bleaching events
þ
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