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Net Ecosystem Exchange of CO 2 in Deciduous Pine Forest of Lower Western Himalaya, India

Author

Listed:
  • Nilendu Singh

    (Centre for Glaciology, Wadia Institute of Himalayan Geology, Dehradun 248001, India)

  • Bikash Ranjan Parida

    (Department of Geoinformatics, School of Natural Resource Management, Central University of Jharkhand, Ranchi 835205, India)

  • Joyeeta Singh Charakborty

    (Forest Research Institute, Dehradun 248001, India)

  • N.R. Patel

    (Indian Institute of Remote Sensing, Dehradun 248001, India)

Abstract

Carbon cycle studies over the climate-sensitive Himalayan regions are relatively understudied and to address this gap, systematic measurements on carbon balance components were performed over a deciduous pine forest with an understory layer. We determined annual net carbon balance, seasonality in components of carbon balance, and their environmental controls. Results indicated a strong seasonality in the behavior of carbon exchange components. Net primary productivity (NPP) of pine forest exceeded soil respiration during the growing phase. Consequently, net ecosystem exchange exhibited a net carbon uptake. In the initial phase of the growing season, daily mean uptake was −3.93 (±0.50) g C m −2 day −1 , which maximizes (−8.47 ± 2.3) later during post-monsoon. However, a brief phase of carbon release was observed during peak monsoon (August) owing to an overcast condition. Nevertheless, annually the forest remained as a carbon sink. The understory is extensively distributed and it turned out to be a key component of carbon balance because of sustained NPP during the pine leafless period. Temperature and evaporative fraction exhibited a prime control over the seasonal carbon dynamics. Our observations could lend certain useful insights into the application of coupled climate-carbon cycle models for the Himalaya and ecological functions in the region.

Suggested Citation

  • Nilendu Singh & Bikash Ranjan Parida & Joyeeta Singh Charakborty & N.R. Patel, 2019. "Net Ecosystem Exchange of CO 2 in Deciduous Pine Forest of Lower Western Himalaya, India," Resources, MDPI, vol. 8(2), pages 1-20, May.
    • Handle: RePEc:gam:jresou:v:8:y:2019:i:2:p:98-:d:232658
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    References listed on IDEAS

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    1. R. Wehr & J. W. Munger & J. B. McManus & D. D. Nelson & M. S. Zahniser & E. A. Davidson & S. C. Wofsy & S. R. Saleska, 2016. "Seasonality of temperate forest photosynthesis and daytime respiration," Nature, Nature, vol. 534(7609), pages 680-683, June.
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