C dynamics
and global change research
at the Institute of Pacific Islands Fores
J.
J. Boone
Boone Kauffman
Kauffman
Institute
Institute of
of Pacific
Pacific Islands
Islands Forestry
Forestry
1151
1151 Punchbow1
Punchbow1 St
St Rm
Rm 323
323
Honolulu
Honolulu Hawaii
Hawaii 96813
96813
808-522-8230
808-522-8230 ext
ext 117
117
Boonekauffman@fs.fed.us
Boonekauffman@fs.fed.us
Institute of
Pacific Islands
Forestry
Restoration
Wetlands
Advisory Council
•Dir. PSW Res. Sta.
•Regional Forester, R5
•Dir. Intl Programs
Invasive
species
Forest
Management
Services
C pools greatly
vary at spatial
scales
Life Zones – Land Cover
Costa Rica
TAGB – Costa Rica Primary forests
600
>1 00cm
Tr ees 70-1 00cm
Tr ees 50-70cm
400
Tr ees 30-50 cm
Tr ees1 0-30cm
300
Tr ees 0-1 0cm
Standi ng Dead
200
Pal ms
Li anas
100
Seedl i ngs
Downed Wood
0
w
et
pr
em
on
ta
ne
lo
ra
w
in
er
m
on
ta
ne
ra
in
Pr
em
on
ta
ne
or
es
t
et
f
w
w
et
tra
ns
fo
re
st
pr
em
on
ta
ne
M
oi
st
Fo
re
st
Li tter / f or est f l oor
Dr
y
Biom ass (Mg/ha)
500
Soil C Pools
3
2.5
2
1.5
1
0.5
PM rain
LM Rain
PM Wet
Wet trans
Wet
Moist
0
Dry
Soil C mass (Mg/ha x 100)
Soil C Pools Costa Rica Tropical
forests (means and 95% CIs)
pr
ta
low
mo
n
em
on
er
pr
ta
ta
ne
ne
ra
ra
st
t
t
in
in
et
re
ns
es
es
w
fo
tr a
ne
et
et
or
Fo
r
tf
ta
w
w
mo
n
ne
Pr
e
em
on
Mo
is
Dr
y
C m as s (M g/ha)
Ecosystem C pools
600
500
400
300
Abovegroun
d
200
0-10
100
10-20
0
20-30
30-50
50-100
Land use/Land cover change
360
Biomass dynamics of
Amazon Evergreen forest & Mexican Tropical dry fore
341
320
Assumptions
280
Moist Forest
Dry Forest
Total Aboveground biomass (Mg ha-1)
334 (298-400)
127 (74-135)
Combustion Factor - slash (% of TAGB)
48
71
Pasture biomass increase year-1 (Mg ha-1) 8.9
6
Combustion factor (%) - w ood in pasture 38
60
Combustion factor (%) - recent grow th
98
87
240
200
177
195
160
127
110
120
128
80
68
86
54
36.5
40
36
37
11
23
6
18
0
0
1
2
2
4
3
6
4
16
16
4
34
15
3
3
8
5
10
6
10
Years since conversion
Cumulative number of fir
Secondary forest - PNSR
Interactions of land use and natural processes that
affects rates of C sequestration in tropical secondary forests
C pool (M g/ha )
A
Inherent differences among
forests in rates
of C sequestration
B
C
D
E
F
Time since abandonment
Land use decreases rates
and may affect
saturation potential
Invasive alien grasses increase fire
frequency and decrease
establishment sites, degrading
native forests.
Figure 1. Conceptual figure of the potential effects of scaly sword
fern invasion on Hawaiian rain forest ecosystems. Scaly fern is
hypothesized to alter fuels, greatly increasing the likelihood of
wildland fire. In postfire environments, the alien species creates
conditions favorable to its persistence but deleterious to rainforest
recovery (modified from D’Antonio and Vitousek 1992).
700
30
600
25
500
20
400
15
300
10
200
100
5
0
0
F
I
R
Yela River
Kosrae
F I
R 6 5 4 8 7
6
mouth
scrub
Sapwalap
Shark River Taylor Slough
River
ENP
ENP
Pohnpei
Tree Height (m)
Aboveground Biomass (Mg ha-1)
STRUCTURE: Aboveground Biomass
The End