Fluxes of Cadmium, Chromium, and Lead Along with Throughfall and Stemflow Vary Among Different Types of Subtropical Forests

Forests, Journal Year: 2025, Volume and Issue: 16(1), P. 152 - 152

Published: Jan. 15, 2025

The interaction between forests and precipitation plays a crucial role in the material cycling of forest ecosystems. Atmospheric deposition rainfall leaching promote transfer heavy metals to floor, while canopy exchange may potentially slow this process. Therefore, studying metal fluxes their influencing factors, along with partitioning, is essential for understanding cycling. We conducted year-long experiment examine dynamics chromium (Cr), cadmium (Cd), lead (Pb) concentrations four types (Cunninghamia lanceolata plantations, Castanopsis carlesii Cas. natural forests, secondary forests) located subtropical regions southeast China. Results showed that (1) annual mean Cr, Cd, Pb were 167.6, 13.8, 6180.5 μg L−1 throughfall 204.7, 28.4, 2251.1 stemflow, respectively, through 29.3, 2.4, 847.7 g ha−1, 1.7, 0.2, 12.7 ha−1 respectively; (2) these associated did not vary types, but highest forests; (3) Cr concentration flux higher during rainy than dry seasons, Cd an opposite trend. Overall, our results indicate partitioning are primarily controlled by meteorological indicating conversion other will substantially change hydrological processes. These contribute better ecosystems valuable sustainable management, particularly context type transformation.

Language: Английский

Rainfall Partitioning Dynamics in Xerophytic Shrubs: Interplays Between Self-Organization and Meteorological Drivers

Forests, Journal Year: 2025, Volume and Issue: 16(4), P. 605 - 605

Published: March 30, 2025

Rainfall partitioning, a crucial process in shaping the local hydrological cycle, governs canopy interception and subsequent soil water recharge. While structure meteorological conditions fundamentally regulate this process, role of plant self-organization its interactions with drivers (non-precipitation variables particular) remain underexplored. To address gap, we investigated rainfall partitioning components, including amount, intensity, efficiency, temporal dynamics throughfall stemflow, clumped scattered Vitex negundo L. var. heterophylla (Franch.) Rehder shrubs Yangjuangou catchment Chinese Loess Plateau during 2021–2022 rainy seasons. Despite comparable net precipitation (clumped: 83.5% vs. scattered: 84.2% incident rains), divergent strategies emerged. Clumped V. exhibited greater stemflow (8.6% 5.2%), characterized by enhanced favorable dynamics. Conversely, favored generation (79.0% 74.9%). Consistent previous research, amount was recognized as primary control on rains. Furthermore, our integrated analysis, combining machine learning variance decomposition, highlighted critical roles antecedent wetness (4 h pre-event leaf wetness) wind speed thresholds (e.g., low gust) regulating efficiency These findings advance mechanistic understanding interplay between processes, demonstrating how morphological adaptations optimize harvesting semi-arid ecosystems. This addressed need to incorporate dynamic interplays (specifically, self-organized patterns) factors (particularly non-precipitation variables) into ecohydrological models, especially for improved predictions water-limited regions.

Language: Английский

Alterations of throughfall and stemflow chemistry by vegetation in China: Insights from a machine learning based meta-analysis

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 641, P. 131786 - 131786

Published: Aug. 11, 2024

Language: Английский