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Large seasonal swings in leaf area of Amazon rainforests
Open accessAbstract
Despite early speculation to the contrary, all tropical forests studied to date display seasonal variations in the presence of new leaves, flowers, and fruits. Past studies were focused on the timing of phenological events and their cues but not on the accompanying changes in leaf area that regulate vegetation–atmosphere exchanges of energy, momentum, and mass. Here we report, from analysis of 5 years of recent satellite data, seasonal swings in green leaf area of ≈25% in a majority of the Amazon rainforests. This seasonal cycle is timed to the seasonality of solar radiation in a manner that is suggestive of anticipatory and opportunistic patterns of net leaf flushing during the early to mid part of the light-rich dry season and net leaf abscission during the cloudy wet season. These seasonal swings in leaf area may be critical to initiation of the transition from dry to wet season, seasonal carbon balance between photosynthetic gains and respiratory losses, and litterfall nutrient cycling in moist tropical forests.
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Cited by
Nobre, C. A., Sampaio, G., Borma, L. S., Castilla-Rubio, J. C., Silva, J. S., & Cardoso, M. (2016) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1605516113 · Cited by 1,045
Nepstad, D. C., Stickler, C. M., Filho, B. S., & Merry, F. (2008) · Philosophical Transactions of the Royal Society B: Biological Sciences · doi:10.1098/rstb.2007.0036 · Cited by 725
Roy, D. P., Boschetti, L., Justice, C. O., & Ju, J. (2008) · Remote Sensing of Environment · doi:10.1016/j.rse.2008.05.013 · Cited by 722
Self-citationChambers, J. Q., Asner, G. P., Morton, D. C., Anderson, L. O., Saatchi, S. S., Espírito-Santo, F. D. B., Palace, M., & Souza, C. (2007) · Trends in Ecology & Evolution · doi:10.1016/j.tree.2007.05.001 · Cited by 304
Self-citationPredicting species distributions across the Amazonian and Andean regions using remote sensing data
Buermann, W., Saatchi, S., Smith, T. B., Zutta, B. R., Chaves, J. A., Milá, B., & Graham, C. H. (2008) · Journal of Biogeography · doi:10.1111/j.1365-2699.2007.01858.x · Cited by 179
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Metadata
- Authors
- Myneni, R. B., Yang, W., Nemani, R. R., Huete, A. R., Dickinson, R. E., Knyazikhin, Y., Didan, K., Fu, R., Negrón Juárez, R. I., Saatchi, S. S., Hashimoto, H., Ichii, K., Shabanov, N. V., Tan, B., Ratana, P., Privette, J. L., Morisette, J. T., Vermote, E. F., Roy, D. P., Wolfe, R. E., Friedl, M. A., Running, S. W., Votava, P., El-Saleous, N., Devadiga, S., Su, Y., & Salomonson, V. V.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2007-03-20
- Volume
- 104
- Issue
- 12
- Pages
- 4820-4823
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2138528351
- Cited by
- 430
- References
- 0
- FWCI
- 20.47
- Type
- journal article
- Language
- en
- Open access
- green
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- The paper
- Myneni, R. B., Yang, W., Nemani, R. R., Huete, A. R., Dickinson, R. E., Knyazikhin, Y., Didan, K., Fu, R., Negrón Juárez, R. I., Saatchi, S. S., Hashimoto, H., Ichii, K., Shabanov, N. V., Tan, B., Ratana, P., Privette, J. L., Morisette, J. T., Vermote, E. F., Roy, D. P., . . . Salomonson, V. V. (2007). Large seasonal swings in leaf area of Amazon rainforests. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0611338104
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