Short-term variations in delta(13)C of ecosystem respiration reveals link between assimilation and respiration in a deciduous forest

Oecologia
Alexander KnohlNina Buchmann

Abstract

We present a comprehensive dataset of hourly, daily, and monthly measurements of carbon isotope measurements of CO(2) in canopy air from a temperate deciduous forest with the aim to identify the relevance of short-term variations in the isotopic signature of ecosystem respiration (delta(13)C(R)) and to understand its underlying physiological processes. We show that during daytime low vertical mixing inside the canopy can lead to decoupling of the air in the lower and upper canopy layer resulting in large spatial variation of delta(13)C in CO(2) of canopy air. Intercept of Keeling Plots also showed large temporal variation (3.8 per thousand) over the course of the day demonstrating that intercepts can differ between day and night and suggesting that choosing the right time for sampling is essential to capture the isotopic signature of ecosystem respiration (delta(13)C(R)). delta(13)C(R) as obtained from night-time measurements showed large variation of up to 2.65 per thousand on a day-to-day basis, which was similar to the observed variation of delta(13)C(R) over the seasonal cycle (3.08 per thousand). This highlights the importance of short-term physiological processes within ecosystems for the isotopic composition of CO(2) in ...Continue Reading

References

Jul 17, 1999·Rapid Communications in Mass Spectrometry : RCM·R A WernerW A Brand
Nov 1, 1994·Tree Physiology·R H Waring, W B Silvester
Oct 1, 1994·Tree Physiology·W R HorwathE A Paul
Jul 30, 2004·Rapid Communications in Mass Spectrometry : RCM·Alexander KnohlWilli A Brand
Apr 1, 2001·Oecologia·Donald L Phillips, Jillian W Gregg
Apr 1, 1997·Oecologia·J R BrooksJames R Ehleringer
Sep 1, 1994·Oecologia·Jon Lloyd, Graham D Farquhar

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Citations

Feb 26, 2010·Isotopes in Environmental and Health Studies·Kadmiel MaseykMaurizio Mencuccini
Jun 7, 2011·Isotopes in Environmental and Health Studies·Matjaz Cater, Nives Ogrinc
Jan 9, 2008·The New Phytologist·David R BowlingJames T Randerson
Jul 10, 2007·Plant, Cell & Environment·Guillaume TcherkezHoward Griffiths
Jan 31, 2006·Rapid Communications in Mass Spectrometry : RCM·Sabine GöttlicherAndreas Richter
Nov 4, 2006·Plant, Cell & Environment·James L PraterJeffrey P Chanton
Dec 15, 2010·Rapid Communications in Mass Spectrometry : RCM·Elizabeth M Powers, John D Marshall
Jul 21, 2010·The New Phytologist·Owen AtkinMatthew Turnbull
Sep 3, 2008·Isotopes in Environmental and Health Studies·Joachim MohnLukas Emmenegger

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