Phytoplankton Communities’ Response to Thermal Stratification and Changing Environmental Conditions in a Deep-Water Reservoir: Stochastic and Deterministic Processes

Sustainability, Journal Year: 2024, Volume and Issue: 16(7), P. 3058 - 3058

Published: April 6, 2024

Thermal stratification has become more extensive and prolonged because of global warming, this change had a significant impact on the distribution patterns phytoplankton communities. However, response community structures assembly processes to thermal is not fully understood. We predicted that structure communities would be affected by among water layers associated with environmental condition changes, reflecting certain in temporal spatial scales. Phytoplankton from Danjiangkou Reservoir were collected October 2021 July 2022 verify prediction. During sampling period, remained thermally stratified stability. The composition surface layer significantly differed both thermocline bottom layer. phenomenon pattern nitrogen phosphorus and, thus, structures. Deterministic greater influence layers. In contrast, stochastic prevalent community. within exhibited broader niche range than layers, showing notable dissimilarity Canonical correspondence analysis (CCA) revealed vertical distributions correlated NH4+-N, pH, temperature (WT). summary, study explained deep-water reservoirs during period. Additionally, explored potential using stratified-state under subtropical–warm temperate climate as indicators context warming.

Language: Английский

---

Comparative Analysis of Laboratory-Based and Spectroscopic Methods Used to Estimate the Algal Density of Chlorella vulgaris

Microorganisms, Journal Year: 2024, Volume and Issue: 12(6), P. 1050 - 1050

Published: May 23, 2024

Chlorella vulgaris is of great importance in numerous exploratory or industrial applications (e.g., medicals, food, and feed additives). Rapid quantification algal biomass crucial photobioreactors for the optimization nutrient management estimation production. The main goal this study to provide a simple, rapid, not-resource-intensive method determining density C. according measured parameters using UV–Vis spectrophotometry. Comparative assessment measurements were conducted with seven different methods filtration, evaporation, chlorophyll extraction, detection optical fluorescence) determine biomass. By analyzing entire spectra diluted algae samples, optimal wavelengths determined through stepwise series linear regression analyses by novel correlation scanning method, facilitating accurate parameter estimation. Nonlinear formulas spectrometry-based processes derived each parameter. As result, general formula concentration was developed, recommendations suitable measuring devices based on levels. New values magnesium content average single-cell weight established, addition development semiautomated cell counting improving efficiency accuracy cultivation biotechnology applications.

Language: Английский

---

Planktonic communities as indicators of water quality in a tropical reservoir

Environmental Management, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Language: Английский

---

Dynamics of Phytoplankton Communities and Their Characteristics of Realized Niches in a Drinking Reservoir

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(4)

Published: April 1, 2025

Realized niches are crucial in defining their optimal conditions and serve as valuable tools for predicting the phytoplankton dynamics relation to eutrophication, climate change, harmful blooms. However, previous studies have largely focused on marine ecosystems, leaving freshwater systems less studied. In this study, we elucidate patterns of community succession based niche characteristics Shanmei (SM) Reservoir, a drinking water source Quanzhou, Fujian Province. Additionally, variations were mainly explained by realized niche. SM total chlorophyll concentrations ranged from 252 24,008 ng/L. The was dominated Chlorophyta Cyanophyta, which consisted mostly Pseudanabaena Microcystis, especially summer. This dominance attributed wide breadth high mean temperature, nitrogen, dissolved reactive phosphorus. On other hand, Cryptophyta Bacillariophyta reached higher autumn winter, linked low temperature niches. Under multiple pressures change anthropogenic activities, Cyanophyta likely thrive environments characterized rising temperatures elevated nutrient concentrations. is particularly true buoyant cyanobacteria such Pseudanabaena, well-suited stratified layers induced temperatures. Therefore, incorporating bloom-forming species would contribute prevention management blooms, ultimately improving safety water.

Language: Английский

---

Study on the spatiotemporal distribution of algal blooms and its influencing factors in young reservoirs based on remote sensing interpretation

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 354, P. 120333 - 120333

Published: Feb. 20, 2024

Language: Английский

---

Distinct differences of vertical phytoplankton community structure in mainstream and a tributary bay of the Three Gorges Reservoir, China

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: March 22, 2024

The vertical distribution of phytoplankton plays a crucial role in shaping the dynamics and structure aquatic communities. In highly dynamic reservoir systems, water level fluctuations significantly affect physiochemical conditions community. However, specific effects on characteristics between mainstream tributary bay remain unstudied. This study investigated aspects density, biomass, α β diversity through monthly sampling over two years (Chang Jiang, CJ) (Xiang Xi, XX) Three Gorges Reservoir China. Phytoplankton density biomass were higher XX, indicating an increased risk algal blooms tributary. community CJ showed more stable species-environment relationships, lower Shannon index evenness index, suggesting relatively simple uniform among different layers. Conversely, XX greater differences layers (higher diversity), with significant negative correlations positive DO difference, dissolved silica (DSi) stratification. Peak as well high occurred during periods decreased levels strong stratification spring summer. A structural equation model complemented by path analysis revealed that decrease could increase either directly internal processes extended residence time or indirectly modifying DSi XX. Therefore, proposed quality management strategy for was to reduce implementing artificial mixing periods. Overall, this lies its comprehensive investigation both Reservoir, elucidating impact providing insights targeted strategies mitigate potential ecological impacts.

Language: Английский

---

Identifying environmental impacts on planktonic algal proliferation and associated risks: a five-year observation study in Danjiangkou Reservoir, China

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Sept. 16, 2024

Language: Английский

---

Algal or bacterial community: Who can be an effective indicator of the impact of reclaimed water recharge in an urban river

Water Research, Journal Year: 2023, Volume and Issue: 247, P. 120821 - 120821

Published: Nov. 1, 2023

Language: Английский

---

The influence mechanism of water level operation on algal blooms in canyon reservoirs and bloom prevention

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169377 - 169377

Published: Dec. 13, 2023

Language: Английский

---

Interannual succession of phytoplankton community in a canyon-shaped drinking water reservoir during the initial impoundment period: Taxonomic versus functional groups

Journal of Environmental Sciences, Journal Year: 2024, Volume and Issue: 151, P. 454 - 468

Published: April 21, 2024

Language: Английский

---