NDLI: Response of canopy quantum yield of alpine meadow to temperature under low atmospheric pressure on Tibetan Plateau

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Response of canopy quantum yield of alpine meadow to temperature under low atmospheric pressure on Tibetan Plateau

Content Provider	Springer Nature Link
Author	Xu, Lingling Zhang, Xianzhou Shi, Peili Yu, Guirui
Copyright Year	2006
Abstract	An open-path eddy covariance system was set up in Damxung rangeland station to measure the carbon flux from July to October, 2003. The canopy quantum yield (α) of alpine meadow was calculated by the linear function between the net ecosystem carbon dioxide exchange (NEE) and the photosynthetic active radiation (PAR) under low light, and how it was influenced by the temperature was also discussed. Results showed that the canopy α decreased almost linearly with temperature, with the decrease in every 1 °C increase of temperature similar to those measured on leaf level of C$_{3}$ plant. At the beginning, the decrease of canopy α with temperature was 0.0005 μmol CO$_{2}$·μmol$^{−1}$ PAR; while it increased to 0.0008 μmol CO$_{2}$·μmol$^{−1}$ PAR in September, showing a rising trend with plant growing stages. Compared with the canopy α calculated with rectangular hyperbola function, the value in the paper was lower. However, the method advanced here has the advantages in examining the relationship between α and the key environmental factors, such as temperature.
Starting Page	219
Ending Page	225
Page Count	7
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	49
Issue Number	2
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	2006-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	Tibetan Plateau alpine meadow canopy quantum yield temperature Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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