Abstract
ABSTRACT The intra-annual increase in irradiance and temperature is associated with a short dry season in the central Amazon. Notwithstanding, the accurate effect of intra-annual microclimatic variability on tree growth of multipurpose-use species is still under investigation. The aim of this study was to evaluate how stem growth in diameter (radial growth) responds to monthly variations in microclimatic factors in the central Amazon. During four years (2018-2021) we recorded climatic data and measured stem growth of 29 trees from seven species. In order to evaluate the effect of microclimatic variability on radial growth we applied principal component regression. On average the species had a stem growth in diameter of 1.50 ± 0.74 mm yr⁻¹. The radial growth of most species increased with an increase in monthly rainfall intensity and soil moisture, while the effect of mean temperature and vapor pressure deficit varied among species. In Brosimum parinarioides, Licania micrantha, and Pouteria guianensis stem growth decreased with a rise in mean temperature, while the increase in mean vapor pressure deficit slowed down the radial growth in Brosimum parinarioides, Licania micrantha, Micropholis guyanensis, Pouteria guianensis and Theobroma sylvestre. Minimum and maximum temperatures had a neutral effect on stem growth across species. This study shows that the evaluated multipurpose-use trees are not acclimated to intra-annual climatic variability, as in addition to reducing growth during the dry season, they also responded to monthly changes in mean temperature and vapor pressure deficit, which is relevant in the face of the ongoing climate change.
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Claims 8
Claim · model-written summary
The studied tree species had a mean stem growth in diameter of 1.50 ± 0.74 mm yr⁻¹.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e1“On average the species had a stem growth in diameter of 1.50 ± 0.74 mm yr⁻¹”
Claim · model-written summary
Radial growth of most species increased with an increase in monthly rainfall intensity and soil moisture.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e2“The radial growth of most species increased with an increase in monthly rainfall intensity and soil moisture”
Claim · model-written summary
Stem growth of Brosimum parinarioides, Licania micrantha and Pouteria guianensis decreased with a rise in mean temperature.
- Taxon
- Brosimum parinarioides, Licania micrantha, and Pouteria guianensisPouteria guianensis
Licania micranthaBrosimum parinarioidese3 - Treatment
- a rise in mean temperaturee3
- Outcome
- stem growthe3
- Direction
- decreasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e3“In Brosimum parinarioides, Licania micrantha, and Pouteria guianensis stem growth decreased with a rise in mean temperature”
Claim · model-written summary
An increase in mean vapor pressure deficit slowed down the radial growth of Brosimum parinarioides, Licania micrantha and Micropholis guyanensis.
- Taxon
- Brosimum parinarioides, Licania micrantha, Micropholis guyanensisMicropholis guyanensisLicania micranthaBrosimum parinarioidese4
- Treatment
- increase in mean vapor pressure deficite4
- Outcome
- radial growthe4
- Direction
- slowed downe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e4“the increase in mean vapor pressure deficit slowed down the radial growth in Brosimum parinarioides, Licania micrantha, Micropholis guyanensis, Pouteria guianensis and Theobroma sylvestre”
Claim · model-written summary
An increase in mean vapor pressure deficit slowed down the radial growth of Pouteria guianensis and Theobroma sylvestre.
- Taxon
- Pouteria guianensis and Theobroma sylvestre
Theobroma sylvestrePouteria guianensise4 - Treatment
- increase in mean vapor pressure deficite4
- Outcome
- radial growthe4
- Direction
- slowed downe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e4“the increase in mean vapor pressure deficit slowed down the radial growth in Brosimum parinarioides, Licania micrantha, Micropholis guyanensis, Pouteria guianensis and Theobroma sylvestre”
Claim · model-written summary
The effect of mean temperature and vapor pressure deficit on radial growth varied among species.
- Taxon
- Amazonian tree speciest0
- Treatment
- mean temperature and vapor pressure deficite5
- Outcome
- effecte5
- Qualifier
- varied among speciese5
Not reportedDirection
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e5“the effect of mean temperature and vapor pressure deficit varied among species”
Claim · model-written summary
Minimum and maximum temperatures had a neutral effect on stem growth across species.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e6“Minimum and maximum temperatures had a neutral effect on stem growth across species”
Claim · model-written summary
The trees reduced stem growth during the dry season.
Verbatim
t0“Radial growth of seven multipurpose-use Amazonian tree species”
e7“in addition to reducing growth during the dry season”