Academic Journal
Analysing Amazonian forest productivity using a new individual and trait-based model (TFS v.1)
| العنوان: | Analysing Amazonian forest productivity using a new individual and trait-based model (TFS v.1) |
|---|---|
| المؤلفون: | Fyllas, N. M., Gloor, E., Mercado, L. M., Sitch, S., Quesada, C. A., Domingues, T. F., Galbraith, D. R., Torre-Lezama, A., Vilanova, E., Ramírez-Angulo, H., Higuchi, N., Neill, D. A., Silveira, M., Ferreira, L., Aymard C., G. A., Malhi, Y., Phillips, O. L., Lloyd, J. |
| المصدر: | eISSN: 1991-9603 |
| سنة النشر: | 2018 |
| المجموعة: | Copernicus Publications: E-Journals |
| الوصف: | Repeated long-term censuses have revealed large-scale spatial patterns in Amazon basin forest structure and dynamism, with some forests in the west of the basin having up to a twice as high rate of aboveground biomass production and tree recruitment as forests in the east. Possible causes for this variation could be the climatic and edaphic gradients across the basin and/or the spatial distribution of tree species composition. To help understand causes of this variation a new individual-based model of tropical forest growth, designed to take full advantage of the forest census data available from the Amazonian Forest Inventory Network (RAINFOR), has been developed. The model allows for within-stand variations in tree size distribution and key functional traits and between-stand differences in climate and soil physical and chemical properties. It runs at the stand level with four functional traits – leaf dry mass per area ( M a ), leaf nitrogen (N L ) and phosphorus (P L ) content and wood density ( D W ) varying from tree to tree – in a way that replicates the observed continua found within each stand. We first applied the model to validate canopy-level water fluxes at three eddy covariance flux measurement sites. For all three sites the canopy-level water fluxes were adequately simulated. We then applied the model at seven plots, where intensive measurements of carbon allocation are available. Tree-by-tree multi-annual growth rates generally agreed well with observations for small trees, but with deviations identified for larger trees. At the stand level, simulations at 40 plots were used to explore the influence of climate and soil nutrient availability on the gross (Π G ) and net (Π N ) primary production rates as well as the carbon use efficiency (C U ). Simulated Π G , Π N and C U were not associated with temperature. On the other hand, all three measures of stand level productivity were positively related to both mean annual precipitation and soil nutrient status. Sensitivity ... |
| نوع الوثيقة: | text |
| وصف الملف: | info:eu-repo/semantics/application/pdf |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/EC/FP7/236936; https://gmd.copernicus.org/articles/7/1251/2014/ |
| DOI: | 10.5194/gmd-7-1251-2014 |
| الاتاحة: | https://doi.org/10.5194/gmd-7-1251-2014 https://gmd.copernicus.org/articles/7/1251/2014/ |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.332EB46 |
| قاعدة البيانات: | BASE |
كن أول من يترك تعليقا!