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[Rainfall process and nitrogen input in three typical forests of Jinyun Mountain]
Huan Jing Ke Xue= Huanjing Kexue
|June 3, 2014
Summary
Forest type significantly impacts rainfall interception and nitrogen deposition. Mixed forests received the highest nitrogen input via throughfall and stemflow, highlighting variations in forest ecosystems.
Area of Science:
- Forest Ecology
- Biogeochemistry
- Environmental Science
Background:
- Forest ecosystems play a crucial role in nutrient cycling.
- Understanding rainfall interception and nutrient deposition is vital for forest health and management.
- Jinyun Mountain hosts diverse forest types, including Evergreen Broad-leaved Forest (EBF), Bamboo Forest (BF), and Mixed Forest (MF).
Purpose of the Study:
- To analyze the rainfall interception processes (throughfall and stemflow) in three distinct forest types.
- To quantify the atmospheric nitrogen input via throughfall and stemflow in these forests.
- To investigate the relationships between rainfall characteristics and nitrogen deposition.
Main Methods:
- Field study conducted on Jinyun Mountain from May to October 2012.
- Monitoring of atmospheric rainfall, throughfall, and stemflow volumes.
- Chemical analysis of nitrogen concentrations (NO3(-) and NH4(+)) in collected water samples.
Main Results:
- Throughfall and stemflow volumes varied significantly across forest types, with BF showing the highest throughfall percentage and BF the highest stemflow percentage.
- Nitrogen concentrations (NO3(-) and NH4(+)) were higher in throughfall and stemflow than in atmospheric rainfall, with MF exhibiting the highest concentrations.
- Total inorganic nitrogen input was highest in MF, followed by BF and EBF, with significant linear relationships observed between nitrogen input and water flow.
Conclusions:
- Forest canopy structure and composition significantly influence rainfall partitioning and nutrient interception.
- Mixed forests act as significant sinks for atmospheric nitrogen deposition.
- The findings provide critical data for understanding nutrient dynamics in forest ecosystems and informing conservation strategies.
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