Abstract
Carbon cycling in ecosystems, and especially in forests, is intensively studied to predict the effects of global climate change, and the role which forests may play in 'changing climate change'. One of the questions is whether the carbon balance of forests will be affected by increasing atmospheric CO2 concentrations. Regarding this question, effects of elevated [CO2] on woody-tissue respiration have frequently been neglected. Stem respiration of three Populus species (P. alba L. (Clone 2AS-11), P. nigra L. (Clone Jean Pourtet), and P. x euramericana (Clone I-214)) was measured in a managed, high-density forest plantation exposed to free-air CO2 enrichment (POPFACE). During the period of measurements, in May of the third year, stem respiration rates were not affected by the FACE treatment. Moreover, FACE did not influence the relationships between respiration rate and both stem temperature and relative growth rate. The results were supported by the reported absence of a FACE-effect on growth and stem wood density.
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Claims 3
Claim · model-written summary
FACE did not affect stem respiration rates in May of year three.
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the period of measurements, in May of the third year, stem respiration rates were not affected by the FACE treatment.”
t0“Populus species”
Claim · model-written summary
FACE did not alter the relationship between respiration rate and stem temperature.
- Treatment
- FACEe0
- Outcome
- relationships between respiration rate and both stem temperature and relative growth ratee0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FACE did not influence the relationships between respiration rate and both stem temperature and relative growth rate.”
t0“Populus species”
Claim · model-written summary
FACE had no reported effect on growth or stem wood density.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reported absence of a FACE-effect on growth and stem wood density”
t0“Populus species”
The same questions in other papers
co2 · growth · Populus (poplar)Results differ
18 in the opposite direction
- positive
- positive
- positive
15 papers more in this group
See all 19 papers →co2 · physiology: respiration · Populus (poplar)Results agree
1 paper in the same direction as this paper
- no effect
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.