44
H.-J. Bolle
Table 4b. Acetic and formic acid and aldehyde emission rates of Mediterranean species after
Seufert et al. (1997), Kesselmeier et al. (1997, 1998), Kesselmeier and Staudt (1999), Staudt et
al. (2000)
Emission rates in ng (g d.w.)1 mini
Species
Acetic acid
Formic acid
Acetaldehyde
Formaldehyde
Citrus sinensis
1 - 1.3
2-3
(orange)
Pinus pinea
0-5
3.3 - 8.3
6.7 - 25
1.6 - 15
(and pinaster)
Quercus ilex
0-6.6
1.6 - 8.3
6.6 - 15
5 - 13
Table 5. BVOC emiSSIOn fluxes after Seufert et al. (1997) calculated from enclosure
measurements for the main land cover types of Castelporziono (Manes et aI., 1997)
Land cover type
LAI
Specific Leaf
Emission flux ng m l Sl
(projected)
Weight g m- 2
Isoprene
Monoterpene
Pine plantation
3 - 4.5
200
70
1000
Mixed oak forest
4.5 - 8
75
3113
1006
Mediterranean maquis
2-6
175
30
750
Cork oak forest
4-6
100
50
0.1
Pseudosteppe with trees
2.5 - 4.5
100
450
4
Pseudosteppe
2-3
100
150
2
Suppressed macchia
3.5 - 4
175
10
750
Dunes
0-3.5
175
50
300
reported by Seufert et. al. (1997) are presented in Table 5. One of the major results
is the important role oaks play for Isoprene (deciduous oaks) as well as Monoterpene
(Quercus ilex) emissions.