Dynamic Characteristics and Environmental Driving Factors of Phytoplankton Communities in Plateau Rivers: The Case of the Lhasa River

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 283 - 283

Published: Jan. 20, 2025

The dynamic changes in plateau river ecosystems and the driving mechanisms of environmental factors have garnered significant attention. Phytoplankton, a core component aquatic ecosystems, can directly reflect environment. This study focuses on phytoplankton Lhasa River Basin, including riverbed from source to mouth, five largest tributaries, two adjacent wetlands. We analyzed spatial temporal variation characteristics explored based four field surveys conducted between September 2019 March 2021. Results showed that total 127 species six algal phyla were identified, Cyanobacteria. Among these, Bacillariophyta was dominant group, accounting for 41.7% identified species. Spatially, diversity decreasing trend upstream downstream while temporally peaking spring autumn. Redundancy analysis revealed driven by hardness altitude, midstream pH potassium ions, nitrate ammonium nitrogen. Classification regression tree hardness, magnesium nitrite key influencing abundance, diversity, evenness. highlights ecological dynamics communities River, demonstrating their high sensitivity factors. These findings could help establish as critical indicators ecosystem health provide scientific guidance conservation management ecosystems.

Language: Английский

Hydrological variability significantly influences aquatic biological integrity at the spatial scale in semi-arid watersheds

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133359 - 133359

Published: April 1, 2025

Language: Английский