Abstract
We investigated relationships between tree-ring δ13C and growth, and flux tower estimates of gross primary productivity (GPP) at Harvard Forest from 1992 to 2010. Seasonal variations of derived photosynthetic isotope discrimination (Δ13C) and leaf intercellular CO2 concentration (ci) showed significant increasing trends for the dominant deciduous and coniferous species. Δ13C was positively correlated to growing-season GPP and is primarily controlled by precipitation and soil moisture indicating that site conditions maintained high stomatal conductance under increasing atmospheric CO2 levels. Increasing Δ13C over the 1992-2010 period is attributed to increasing annual and summer water availability identified at Harvard Forest and across the region. Higher Δ13C is coincident with an enhancement in growth and ecosystem-level net carbon uptake. This work suggests that tree-ring δ13C could serve as a measure of forest GPP and be used to improve the calibration and predictive skill of ecosystem and carbon cycle models.
| Original language | English (US) |
|---|---|
| Article number | 074011 |
| Journal | Environmental Research Letters |
| Volume | 9 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 1 2014 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Environmental Science(all)
- Public Health, Environmental and Occupational Health
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Tree-ring δ 13C tracks flux tower ecosystem productivity estimates in a NE temperate forest. / Belmecheri, Soumaya; Maxwell, R. Stockton; Taylor, Alan H.; Davis, Kenneth J.; Freeman, Katherine H.; Munger, William J.
In: Environmental Research Letters, Vol. 9, No. 7, 074011, 01.07.2014.Research output: Contribution to journal › Article
TY - JOUR
T1 - Tree-ring δ 13C tracks flux tower ecosystem productivity estimates in a NE temperate forest
AU - Belmecheri, Soumaya
AU - Maxwell, R. Stockton
AU - Taylor, Alan H.
AU - Davis, Kenneth J.
AU - Freeman, Katherine H.
AU - Munger, William J.
PY - 2014/7/1
Y1 - 2014/7/1
N2 - We investigated relationships between tree-ring δ13C and growth, and flux tower estimates of gross primary productivity (GPP) at Harvard Forest from 1992 to 2010. Seasonal variations of derived photosynthetic isotope discrimination (Δ13C) and leaf intercellular CO2 concentration (ci) showed significant increasing trends for the dominant deciduous and coniferous species. Δ13C was positively correlated to growing-season GPP and is primarily controlled by precipitation and soil moisture indicating that site conditions maintained high stomatal conductance under increasing atmospheric CO2 levels. Increasing Δ13C over the 1992-2010 period is attributed to increasing annual and summer water availability identified at Harvard Forest and across the region. Higher Δ13C is coincident with an enhancement in growth and ecosystem-level net carbon uptake. This work suggests that tree-ring δ13C could serve as a measure of forest GPP and be used to improve the calibration and predictive skill of ecosystem and carbon cycle models.
AB - We investigated relationships between tree-ring δ13C and growth, and flux tower estimates of gross primary productivity (GPP) at Harvard Forest from 1992 to 2010. Seasonal variations of derived photosynthetic isotope discrimination (Δ13C) and leaf intercellular CO2 concentration (ci) showed significant increasing trends for the dominant deciduous and coniferous species. Δ13C was positively correlated to growing-season GPP and is primarily controlled by precipitation and soil moisture indicating that site conditions maintained high stomatal conductance under increasing atmospheric CO2 levels. Increasing Δ13C over the 1992-2010 period is attributed to increasing annual and summer water availability identified at Harvard Forest and across the region. Higher Δ13C is coincident with an enhancement in growth and ecosystem-level net carbon uptake. This work suggests that tree-ring δ13C could serve as a measure of forest GPP and be used to improve the calibration and predictive skill of ecosystem and carbon cycle models.
UR - http://www.scopus.com/inward/record.url?scp=84905168427&partnerID=8YFLogxK
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U2 - 10.1088/1748-9326/9/7/074011
DO - 10.1088/1748-9326/9/7/074011
M3 - Article
AN - SCOPUS:84905168427
VL - 9
JO - Environmental Research Letters
JF - Environmental Research Letters
SN - 1748-9326
IS - 7
M1 - 074011
ER -