期刊
BIOGEOCHEMISTRY
卷 94, 期 1, 页码 63-80出版社
SPRINGER
DOI: 10.1007/s10533-009-9308-x
关键词
Luquillo Mountains; Dust; Nutrient cycling; Phosphorus
资金
- U.K. Natural Environment Research Council Fellowship
The input of phosphorus (P) through mineral aerosol dust deposition may be an important component of nutrient dynamics in tropical forest ecosystems. A new dust deposition calculation is used to construct a broad analysis of the importance of dust-derived P to the P budget of a montane wet tropical forest in the Luquillo Mountains of Puerto Rico. The dust deposition calculation used here takes advantage of an internal geochemical signal (Sr isotope mass balance) to provide a spatially integrated longer-term average dust deposition flux. Dust inputs of P (0.23 +/- 0.08 kg ha(-1) year(-1)) are compared with watershed-average inputs of P to the soil through the conversion of underlying saprolite into soil (between 0.07 and 0.19 kg ha(-1) year(-1)), and with watershed-average losses of soil P through leaching (between 0.02 and 0.14 kg ha(-1) year(-1)) and erosion (between 0.04 and 1.38 kg ha(-1) year(-1)). The similar magnitude of dust-derived P inputs to that of other fluxes indicates that dust is an important component of the soil and biomass P budget in this ecosystem. Dust-derived inputs of P alone are capable of completely replacing the total soil and biomass P pool on a timescale of between 2.8 ka and 7.0 ka, less than both the average soil residence time (similar to 15 ka) and the average landslide recurrence interval (similar to 10 ka).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据