ecophysiology of mediterranean species
DESCRIPTION
Ecophysiology of Mediterranean species. L. Serrano 1 , X. Aranda 2 , X. Fábregas 3 , F.X. Martínez 3 , A. Terricabras 4. 1. Dept. Enginyeria Agroalimentària i Biotecnologia. UPC. 2. Dept. Tecnologia Hortícola. IRTA. 3. Escola Superior d’Agricultura de Barcelona. - PowerPoint PPT PresentationTRANSCRIPT
Ecophysiology of Mediterranean species
1. Dept. Enginyeria Agroalimentària i Biotecnologia. UPC.
2. Dept. Tecnologia Hortícola. IRTA.3. Escola Superior d’Agricultura de Barcelona.4. Àrea Metropolitana de Barcelona.
L. Serrano1, X. Aranda2, X. Fábregas3, F.X. Martínez3, A. Terricabras4
Seasonal variations in the ecophysiology and pheno-
morphology of Mediterranean species: adjustment capacity to increasing drought and CO2.
MCYT REN 2002-00633/GLO.
OBJECTIVES To study the seasonal dynamics in the
physiological and morphological responses of Mediterranean species.
To study the seasonal responses to water availability.
To study the responses to increased CO2 under drought.
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Plasticity in functional traits might be linked to species adaptive capacity. ( Norberg et al 2001)
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
SOLAR TIME
6 8 10 12 14 16 18
A (
mol
m-2
s-1
)
-5
0
5
10
15
20
25
30
E (mm
ol m-2 s -1)
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
A E
Cistus ladanifer
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
RWC
0,40,60,81,0
1/
MP
a-1
)
-1,0
-0,8
-0,6
-0,4
-0,2
0,0
Pistacia lentiscus (oct. 2003)
RWC
0,40,60,81,01/
M
P a-1
)
-0,20
-0,15
-0,10
-0,05
0,00
1/100
1/
RWC0
AWF
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
100 ( MPa)-2,0 -1,8 -1,6 -1,4 -1,2 -1,0
A (
mol
CO
2 ·m
-2 ·
S-1)
0
2
4
6
8
10
r2 = 0,85
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Non-intrusive optical techniques.
Chlorophyll fluorescence
Spectral reflectance
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Chl*
PHOTOSYNTHESIS PHOTOCHEMICAL QUENCHING
HEAT DISSIPATION NON-PHOTOCHEMICAL QUENCHING
(xantophyll cycle)
CHLOROPHYLL FLUORESCENCE
low PAR
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Chl*
PHOTOSYNTHESIS PHOTOCHEMICAL QUENCHING
HEAT DISSIPATION NON-PHOTOCHEMICAL QUENCHING
(xantophyll cycle)
CHLOROPHYLL FLUORESCENCE
high PAR
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
qN
0,2
0,4
0,6
0,8
1,0
PRI
-0,08
-0,06
-0,04
-0,02qN PRI
SOLAR TIME
6 8 10 12 14 16 18
ETR
0
50
100
150
200
250
300
F/
Fm'
0,0
0,2
0,4
0,6
0,8
1,0ETR F/Fm'
SOLAR TIME
6 8 10 12 14 16 18
A (
mol
m-2
s-1
)
-5
0
5
10
15
20
25
30
E (mm
ol m-2 s -1)
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
A E
Cistus ladanifer
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Wavelength (nm)400 600 800 1000
Ref
lect
ance
0.0
0.2
0.4
0.6
0.8
1.0
Laurus nobilis predawnLaurus nobilis midday
Xantophyll
Chlorophyll
Water
Ratio indices = Rabs / Rref
Normalized indices = (Rref – Rabs) / (Rref + Rabs)
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Wavelength (nm)400 600 800 1000
Ref
lect
ance
0.0
0.2
0.4
0.6
0.8
1.0
Laurus nobilis predawnLaurus nobilis midday
Wavelength450 500 550 600
re
flect
ance
-0.04
-0.02
0.00
0.02
0.04
SOLAR TIME
4 6 8 10 12 14 16 18 20
PRI
-0,10
-0,08
-0,06
-0,04
-0,02
0,00
0,02
0,04
V. tinus (winter)L. nobillis (autumn)A. unedo (summer)
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
qN
0,2
0,4
0,6
0,8
1,0
PRI
-0,08
-0,06
-0,04
-0,02qN PRI
SOLAR TIME
6 8 10 12 14 16 18
ETR
0
50
100
150
200
250
300
F/F
m'
0,0
0,2
0,4
0,6
0,8
1,0ETR F/Fm'
SOLAR TIME
6 8 10 12 14 16 18
A (
mol
m-2
s-1
)
-5
0
5
10
15
20
25
30
E (mm
ol m-2 s -1)
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
A E
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
ChlT mmol·m-20,0 0,2 0,4 0,6 0,8 1,0 1,2
Chl
_ND
I
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
AUCSPLSNVTCLNO
r2 = 0,70
ChlT mmol·m-20,0 0,2 0,4 0,6 0,8 1,0 1,2
DR
715/
DR
705
0,2
0,4
0,6
0,8
1,0
1,2
1,4
1,6
AUCSPLSNVTCLNO
r2 = 0,78
Seasonal dynamics in the physiological and morphological responses of
Mediterranean species.
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
Important traits determining ecosystem function may be shared by among multiple species: long history of attempts to classify species into functional groups.
(However, difficult because some traits may be only expressed in one context or at one life stage)
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
ps
0,04 0,08 0,12 0,16 0,20
F/F
m'
0,00
0,05
0,10
0,15
0,20
0,25
r2 = 0,97
CO 2
0,002 0,004 0,006 0,008 0,010
F/F
m'
0,00
0,05
0,10
0,15
0,20
r2 = 0,83
Seasonal dynamics in the physiological and morphological responses of Mediterranean species.
PRI-0,14 -0,12 -0,10 -0,08 -0,06 -0,04 -0,02 0,00 0,02
A (
mol
CO
2 · m
-2 ·
s-1 )
0
2
4
6
8
10
r2 = 0,58
Up- scaling: spectral reflectance and transmittance
Serrano et al 2000a
Up-scaling: spectral transmittance
Serrano & Peñuelas (unpublished data)
Net CO2 uptake (mol m-2 s-1)
-2 -1 0 1 2 3 4
T PA
R *
TP
RI
-8
-4
0
4
8winterspringautumnsummer
r2=0.70 (p<0.01)
Up-scaling: AVIRIS reflectance
Serrano et al 2000b
Serrano et al 2002
Up-scaling: AVIRIS reflectance
Acknowledgements
MCYT REN 2002-00633/GLO.
MCYT Ramon y Cajal program to L. Serrano.
Àrea Metropolitana de Barcelona to A. Terricabras.