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
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