From: The response of tropical rainforests to drought—lessons from recent research and future prospects
Parameter | Summary results from | ||
---|---|---|---|
Experimental drought | Seasonal drought | Extreme drought | |
Mortality | Increase (especially large trees) | Increase (especially large trees) | |
Tree growth | Large trees and high-growth rate trees negatively impacted | Decrease likely due to change in C allocation | Reduced or even suppressed |
Net ecosystem exchange | Contrasted patterns | Higher C uptake | |
Gross primary productivity | Moderate decrease | Moderate decrease | |
Ecosystem respiration | Moderate decrease | Strong decrease | |
Fluxes of greenhouse gases other than CO2 | Decrease (but very few information) | ||
Carbon balance | Contrasted patterns | Negate the positive fertilization effect of atmospheric CO2 | |
Transpiration | Decrease through regulation of stomatal conductance | Decrease through regulation of stomatal conductance | |
Shifts in species composition | Variability in mortality rates within phylogeny | Shift to more xeric forest types Increase in lianas? | |
Phenology/litterfall/LAI | Slight decline in litterfall | Leaf renewal driven by solar radiation | Decrease in LAI |
Remote sensing approaches | Green-up in dry season when water is not limited | Contrasted patterns | |
Fire events | Increase (especially in logged and disturbed forests) |