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Tropical rainforest carbon sink declines during El Niño as a result of reduced photosynthesis and increased respiration rates

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Acquisition
2017

Citation

Cavaleri, M.A., Coble, A.P., Ryan, M.G., Bauerle, W.L., Loescher, H.W., and Oberbauer, S.F.. (2017). “Tropical Rainforest Carbon Sink Declines during El Niño as a Result of Reduced Photosynthesis and Increased Respiration Rates.” New Phytologist, August. doi:10.1111/nph.14724.

Summary

Summary Changes in tropical forest carbon sink strength during El Niño Southern Oscillation (ENSO) events can indicate future behavior under climate change. Previous studies revealed ˜6 Mg C ha-1 yr-1 lower net ecosystem production (NEP) during ENSO year 1998 compared with non-ENSO year 2000 in a Costa Rican tropical rainforest. We explored environmental drivers of this change and examined the contributions of ecosystem respiration (RE) and gross primary production (GPP) to this weakened carbon sink. For 1998-2000, we estimated RE using chamber-based respiration measurements, and we estimated GPP in two ways: using (1) the canopy process model MAESTRA, and (2) combined eddy covariance and chamber respiration data. MAESTRA-estimated [...]

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Diurnal curves of mean half-hourly instantaneous gross primary production for eight selected months....JPG
“Diurnal curves of mean half-hourly instantaneous gross primary production for ei”
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  • John Wesley Powell Center for Analysis and Synthesis

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noteCavaleri, M.A., Coble, A.P., Ryan, M.G., Bauerle, W.L., Loescher, H.W., and Oberbauer, S.F.. (2017). “Tropical Rainforest Carbon Sink Declines during El Niño as a Result of Reduced Photosynthesis and Increased Respiration Rates.” New Phytologist, August. doi:10.1111/nph.14724.

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