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Published on: October 16, 2018
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[Global quantification of the spatial variability and temporal stability of throughfall].
Qian Wang1, Chuan Yuan2,3, Ya-Feng Zhang4
11 College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou 311300, China.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|September 5, 2024
Summary
Throughfall, the rain reaching the forest floor, varies by climate and vegetation type, with arid regions and shrubs receiving less. Spatial distribution is stable, but canopy structure impacts temporal stability.
Area of Science:
- Forest hydrology and ecology
- Environmental science
- Plant science
Background:
- Spatial variability and temporal persistence of throughfall influence soil moisture, plant competition, and ecosystem dynamics.
- Understanding throughfall patterns is crucial for effective forest management and ecological restoration.
Purpose of the Study:
- To quantify and compare the amount, spatial heterogeneity, and temporal stability of throughfall across diverse climate zones and plant functional types.
- To identify key factors influencing throughfall characteristics and highlight research gaps.
Main Methods:
- A meta-analysis of 554 peer-reviewed papers published between 2000 and 2022 from Web of Science and CNKI databases.
- Keyword searches were employed to retrieve relevant studies on throughfall characteristics.
- Data on throughfall proportion, spatial variability, and temporal stability were extracted and analyzed across different climatic and vegetation categories.
Main Results:
- Throughfall proportion was lower in arid regions (72.0%±13.6%) compared to humid (75.1%±9.3%) and semi-humid areas (79.9%±10.4%).
- Cold climates exhibited lower throughfall (74.1%±14.6%) than temperate (74.2%±7.5%) and tropical climates (80.9%±14.6%). Shrubs (68.9%±14.9%) received less throughfall than trees (76.7%±9.1%).
- Spatial variability of throughfall was consistent across different zones, and canopy structure was identified as the primary driver of temporal stability.
Conclusions:
- Throughfall patterns are significantly influenced by climate and vegetation type, with implications for water resource availability and ecosystem functioning.
- While spatial distribution is stable, canopy structure plays a critical role in temporal stability, necessitating further investigation.
- Future research should focus on global-scale rules and process-based temporal mechanisms, standardizing observations for enhanced comparability and ecological insights.
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