Agriculture Reference
In-Depth Information
Table 4.3
Biomasses (kg C ha
−1
) and Physiological and Life-History Parameters for the Different
Functional Groups for the Central Plains Experimental Range (CPER) Food Web
Assimilation
efficiency
(%)
Production
efficiency
(%)
Turnover
rate (y
−1
)
Biomass
(kg C ha
−2
)
Functional group
C/N
Predatory mites
8
1.84
60
35
0.160
Nematophaous mites
8
1.84
90
35
0.160
Predatory nematodes
10
1.60
50
37
1.080
Omnivorous nematodes
10
4.36
60
37
0.650
Fungivorous nematodes
10
1.92
38
37
0.410
Bacteriophagous nematodes
10
2.68
60
37
5.800
Collembola
8
1.84
50
35
0.464
Mycophagous Prostigmata
8
1.84
50
35
1.360
Cryptostigmata
8
1.20
50
35
1.680
Amoebas
7
6.00
95
40
3.780
Flagellates
7
6.00
95
40
0.160
Phytophagous nematodes
10
1.08
25
37
2.900
Arbuscular mycorrhizal (AM)
fungi
10
2.00
100
30
7.000
Saprobic fungi
10
1.20
100
30
63.000
Bacteria
4
1.20
100
30
304.000
Detritus
10
0.00
100
100
3,000.000
Roots
10
1.00
100
100
300.000
Consumed
Biomass
F
j
=
d
j
B
j
+
M
j
a
j
p
j
F
j
=
d
j
B
j
+
M
j
a
j
p
j
Unassimilate d
Biomass
(e.g., leavings & feces)
Assimilate d
Biomass
a
j
F
j
(1−
a
j
)
F
j
Production
Biomass
(Growth & Reproduction)
Mineralized
Biomass
(e.g., CO
2
& NH
4
+
)
C
ij
=
a
j
(1−
p
j
)
F
ij
a
j
p
j
F
j
P
j
CN
j
1
CN
i
N
ij
=
a
j
(
−
)
F
ij
Figure 4.3
(A) Representation of a simple trophic interaction
(
Equation 4.1
)
. (B) Schematic diagram
partitioning the fate of consumed matter into various organic and inorganic pools.
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