Gas Exchange and Growth
161
120
- E. globulus _. Q. suber' . A. uned
Cii 100
>
' > ....
:l
80
CI)
"til
~
60
.... c
Q)
(,)
.... 40
8!.
20
0
1 2 3 4 5 6 7 8 9 10 11 12 13
Months
120
B
Eucalyptus globulu
-IL' -I -'F -C
Cii 100
>
'> ....
:l
80
CI)
"til
~ 60
.... c
Q)
(,)
.... 40
8!.
20
0
1 2 3 4 5 6 7 8 9 10 11 12 13
Months
Fig. 8.6A,B. Survivorship curves for given cohortes of leaves of A Three concurring
evergreen tree species in Portugal and B Eucalyptus globulus 1-year-old trees with different water and nutrient supply rates in Portugal. (Borralho and Pereira, unpubl.; see
text and Table 1 for details on treatments)
1989; Metcalfe et al. 1990). In the fast-growing E. giobuius, leaves are
being produced for a much longer period, replacing older ones (compare
Figs. 8.5 and 8.6) and maintaining a younger population of leaves mainly in
the outer layers of the canopy. This will allow a high potential c: value to be
maintained during most of the year.
161
120
- E. globulus _. Q. suber' . A. uned
Cii 100
>
' > ....
:l
80
CI)
"til
~
60
.... c
Q)
(,)
.... 40
8!.
20
0
1 2 3 4 5 6 7 8 9 10 11 12 13
Months
120
B
Eucalyptus globulu
-IL' -I -'F -C
Cii 100
>
'> ....
:l
80
CI)
"til
~ 60
.... c
Q)
(,)
.... 40
8!.
20
0
1 2 3 4 5 6 7 8 9 10 11 12 13
Months
Fig. 8.6A,B. Survivorship curves for given cohortes of leaves of A Three concurring
evergreen tree species in Portugal and B Eucalyptus globulus 1-year-old trees with different water and nutrient supply rates in Portugal. (Borralho and Pereira, unpubl.; see
text and Table 1 for details on treatments)
1989; Metcalfe et al. 1990). In the fast-growing E. giobuius, leaves are
being produced for a much longer period, replacing older ones (compare
Figs. 8.5 and 8.6) and maintaining a younger population of leaves mainly in
the outer layers of the canopy. This will allow a high potential c: value to be
maintained during most of the year.