Spatio/ temporal niches (see Figure 4) Ecohydrological period (see Figure 4)
Total rainfall (mm / days)
Origin/source of plant water used in period
Origin/source of plant water used in period
Leaf water potential (MPa) minimum / maximum Leaf water potential (MPa) minimum / maximum
Geoecohydrological mechanism
Geoecohydrological mechanism
Type of niche use
pine oak pine oak pine oak
A
Wet at the end of summer 2012
40 / 45
Pacific and Atlantic rain
Pacific and Atlantic rain
-1.24 -3.15 -0.98 -2.85
Water acquisition (wa) from top soil and upper regolith
Water acquisition (wa) from top soil and upper regolith
Sharing
B
Dry / depletion early autumn 2012 to late winter 2013
33 / 136
Pacific and Atlantic rain
Rock fracture
-3.15 -5.95 -2.85 -4.83
wa from top soil and upper regolith
wa from fractured rock
Segregation
C
Dry /recovery throughout spring 2013
11 / 92
Rock fracture, Pacific and Atlantic rain
Rock fracture
-5.95 -4.84 -4.83 -3.41
wa from top soil and regolith
Hydraulic lift
Facilitation
D
Wet early summer 2013 to early autumn 2013
408 / 153
Pacific and Atlantic rain
Pacific and Atlantic rain
-4.84 -1.25 -3.41 -1.05
Preferential wa from top soil
Preferential wa from regolith
Partial sharing
E
Dry / depletion early autumn 2013 to late winter 2014
105/92
Pacific and Atlantic rain
Pacific and Atlantic rain, cold fronts
-1.25 -1.51 -1.05 -1.33
wa from upper regolith
wa from low regolith. decoupled from topsoil
Segregation
F
Dry / depletion late winter 2014
14 / 59
Pacific and Atlantic rain
Cold fronts
-1.51 -3.75 -1.33 -1.21
wa from top soil and regolith
Use of water from trunk
Segregation
G
Dry / depletion late winter 2014 to late spring 2014
6 / 30
Cold fronts
Rock fracture
-3.75 -4.83 -1.21 -1.24
Preferential wa from regolith
wa from fractures
Segregation
H
Wet late spring 2014 to early autumn 2014
521 / 184
Pacific and Atlantic rain
Pacific and Atlantic rain
-4.83 -2.23 -1.24 -0.42
Preferential wa from top soil
wa from regolith
Partial sharing
I
Dry / depletion early autumn 2014 to early winter 2014
44 / 61
Pacific and Atlantic rain
Rock fracture
-2.23 -3.29 -0.42 -0.46
wa from upper regolith
Preferential wa from fractures
Segregation