Seasonality of above-ground net primary productivity along an Andean altitudinal transect in Peru
| Autor: | Kenneth J. Feeley, K. Garcia Cabrera, Norma Salinas, Yadvinder Malhi, Joshua M. Rapp, M. Mamani, Javier E. Silva-Espejo, Patrick Meir, Christopher E. Doughty, Cécile A. J. Girardin, Luiz E. O. C. Aragão, Daniel B. Metcalfe, W. Huaraca Huasco, Miles R. Silman, W. Farfan Rios |
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| Rok vydání: | 2014 |
| Předmět: |
0106 biological sciences
Cloud forest Canopy 010504 meteorology & atmospheric sciences Ecology Primary production 15. Life on land Seasonality Plant litter medicine.disease Solar irradiance Atmospheric sciences 010603 evolutionary biology 01 natural sciences Dry season medicine Environmental science Transect Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Journal of Tropical Ecology |
| ISSN: | 1469-7831 0266-4674 |
| Popis: | Solar irradiance and precipitation are the most likely drivers of the seasonal variation of net primary productivity (NPP) in tropical forests. Since their roles remain poorly understood, we use litter traps, dendrometer bands and census data collected from one hectare permanent plots to quantify the seasonality of above-groundNPPcomponents and weather parameters in 13 sites distributed along a 2800-m altitudinal gradient ranging from lowland Amazonia to the high Andes. We combine canopy leaf area index and litterfall data to describe the seasonality of canopy production. We hypothesize that solar irradiance is the primary driver of canopy phenology in wetter sites, whereas precipitation drives phenology in drier systems. The seasonal rhythm of canopyNPPcomponents is in synchrony with solar irradiance at all altitudes. Leaf litterfall peaks in the late dry season, both in lowland (averaging 0.54 ± 0.08 Mg C ha y−1, n = 5) and montane forests (averaging 0.29 ± 0.04 Mg C ha y−1, n = 8). Peaks in above-ground coarse woodyNPPappears to be triggered by the onset of rainfall in seasonal lowland rain forests (averaging 0.26 ± 0.04 Mg C ha y−1, n = 5, in November), but not in montane cloud forests. |
| Databáze: | OpenAIRE |
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