Environmental Engineering Reference
In-Depth Information
Table 4.3
Allometric equations for various mangroves based on DBH (cm)
Species
Aboveground tree weight (
W
top
in kg)
References
top
= 0.140DBH
2.40
Fromard et al. (
1998
)
a
Avicennia germinans
W
2
r
= 0.97, n = 45, Dmax = 4 cm
top
= 0.0942DBH
2.54
Imbert and Rollet (
1989
)
a
W
2
= 0.99, n = 21, Dmax: unknown
r
top
= 0.308DBH
2.11
Avicennia marina
W
Comley and McGuinness (
2005
)
2
= 0.97,
r
n
= 22, Dmax = 35 cm
W
top
= 0.102DBH
2.50
2
Fromard et al. (
1998
)
a
Laguncularia
racemosa
r
= 0.97,
n
= 70, Dmax = 10 cm,
W
top
= 0.209DBH
2.24
2
= 0.99,
Imbert and Rollet (
1989
)
a
r
n
= 17, Dmax: unknown
top
= 0.235DBH
2.42
2
= 0.98,
Rhizophora apiculata
W
r
Ong et al. (
2004
)
n
= 57, Dmax = 28 cm
top
= 0.178DBH
2.47
2
= 0.98,
Imbert and Rollet (
1989
)
a
Rhizophora mangle
W
r
n = 17, Dmax: unknown
top
= 0.128DBH
2.60
2
= 0.92,
Fromard et al. (
1998
)
a
Rhizophora
spp.
W
r
n = 9, Dmax = 32 cm
W
top
= 0.105DBH
2.68
2
= 0.99,
Clough and Scott (
1989
)
a
r
n
= 23, Dmax = 25 cm
W
top
= 0.186DBH
2.31
2
Clough and Scott (
1989
)
a
Bruguiera gymnorrhiza
r
= 0.99,
n
= 17, Dmax = 25 cm
W
top
= 0.168DBH
2.42
2
= 0.99,
Clough and Scott (
1989
)
a
Bruguiera parviflora
r
Dmax = 25 cm,
n
=16
top
= 0.189DBH
2.34
2
= 0.99,
Clough and Scott (
1989
)
a
Ceriops australis
W
r
n = 26, Dmax = 20 cm
top
= 0.0823DBH
2.59
2
= 0.99,
Clough and Scott (
1989
)
a
Xylocarpus grnatum
W
r
n
= 15,
Dmax = 25 cm
W
top
= 0.251pD
2.46
2
Common equation
r
= 0.98,
Komiyama et al. (
2005
)
n
= 104, Dmax = 49 cm
W
top
= 0.168pDBH
2.47
2
= 0.99,
r
Chave et al. (
2005
)
n
= 84, Dmax = 50 cm
W
top
: aboveground tree weight
a
After Saenger (
2002
)
D
max
: the upper range of samples
density differs signi
cantly in different mangrove
species, but less for individuals within a species
(Komiyama et al.
2005
).
A number of reports are now available on
mangrove biomass from different regions of the
world. AGB of 460 t ha
−
1
was reported from a
forest dominated by
concession areas. In high-latitude areas (>24
′
N or S), primary forests mostly have an AGB of
around 100 t ha
−
1
; however, even at 27
°
23
°
24
′
S, an
AGB of 341 t ha
−
1
was reported for an
Avicennia
marina
forest (Mackey
1993
). The lowest AGB
reported was 7.9 t ha
−
1
for a
Rhizophora mangle
forest in Florida, USA (Lugo and Snedaker
1974
). The canopy height of mangrove forests is
generally lower at higher latitudes (Pool et al.
1977
; Saenger and Snedaker
1993
) which is a
justi
in Malaysia
(Putz and Chan
1986
). AGB of more than
300 t ha
−
1
was documented in mangrove forests
in Indonesia (Komiyama et al.
1988
) and French
Guiana (Fromard et al.
1998
). The AGB was less
than 100 t ha
−
1
R. apiculata
ed reason for relatively lower AGB in
higher latitudes (Table
4.4
).
in most secondary forests or