2021
Plant productivity is a key driver of soil respiration response to climate change in a nutrient-limited soil.
Basic and Applied Ecology 50: 155-168.
"While the positive effects of rising atmospheric CO2 on plant growth are well-recognized, climate alarmists often claim such benefits will be reduced or turn negative when they occur in conjunction with model-projected future increases in air temperature.
... the big surprise ... was the growth response observed in the combined elevated CO2 and elevated temperature treatment, which experienced the greatest increase in tree biomass among the four treatments.
Compared to control conditions (ambient CO2 and ambient temperature) total tree biomass increased by a respectable +84%, whereas compared to the ambient CO2 and elevated temperature treatment it rose by a whopping +106%!
... plant height and total above ground biomass increased significantly under elevated CO2 alone (P < 0.05), but were unaffected by elevated temperature alone.
... as shown in the figure below, elevated CO2 stimulated total above and below ground biomass by 43% compared to ambient CO2 and temperature conditions.
... for this eucalyptus tree species, its growth under elevated CO2 conditions through 15 months was not negatively impacted by a 3°C rise in temperature.
... the ... increase in air temperature further stimulated its total biomass."
