Role of hydraulic residence time in shaping phytoplankton community assembly in the upper yellow river cascade reservoirs DOI Creative Commons

Qiyong Luo,

Linyu Zhu,

Daikui Li

et al.

Frontiers in Environmental Science, Journal Year: 2025, Volume and Issue: 13

Published: April 9, 2025

Introduction: Cascade hydropower development significantly alters the structure and function of river ecosystems. Phytoplankton, as primary producers, are highly sensitive to environmental changes, their diversity community reflect state water environment. While there is extensive research on how changes in environments affect phytoplankton structure, studies spatial distribution patterns assembly mechanisms relation hydraulic residence time (HRT)—a key characteristic reservoirs—are limited. Methods: Linear regression analysis was used examine relationship between communities HRT. Additionally, Neutral Community Model (NCM) combined with Modified Stochasticity Ratio (MST) employed reveal types these cascade reservoirs. Finally, Mantel tests stepwise assessed specific impacts factors communities. Results: In ecosystem Yellow River reservoirs, HRT positively correlated abundance across different seasons. annual regulation stations (LJX LYX), species richness, abundance, indices higher compared those runoff stations. Discussion: The primarily driven by deterministic processes, station being more influenced processes than station. HRT, temperature (WT), total nitrogen (TN) most significant affecting structural differences There a positive correlation temperature, especially short where impacted temperature.

Language: Английский

Role of hydraulic residence time in shaping phytoplankton community assembly in the upper yellow river cascade reservoirs DOI Creative Commons

Qiyong Luo,

Linyu Zhu,

Daikui Li

et al.

Frontiers in Environmental Science, Journal Year: 2025, Volume and Issue: 13

Published: April 9, 2025

Introduction: Cascade hydropower development significantly alters the structure and function of river ecosystems. Phytoplankton, as primary producers, are highly sensitive to environmental changes, their diversity community reflect state water environment. While there is extensive research on how changes in environments affect phytoplankton structure, studies spatial distribution patterns assembly mechanisms relation hydraulic residence time (HRT)—a key characteristic reservoirs—are limited. Methods: Linear regression analysis was used examine relationship between communities HRT. Additionally, Neutral Community Model (NCM) combined with Modified Stochasticity Ratio (MST) employed reveal types these cascade reservoirs. Finally, Mantel tests stepwise assessed specific impacts factors communities. Results: In ecosystem Yellow River reservoirs, HRT positively correlated abundance across different seasons. annual regulation stations (LJX LYX), species richness, abundance, indices higher compared those runoff stations. Discussion: The primarily driven by deterministic processes, station being more influenced processes than station. HRT, temperature (WT), total nitrogen (TN) most significant affecting structural differences There a positive correlation temperature, especially short where impacted temperature.

Language: Английский

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