Algal blooms are environmental challenges confronting lakes worldwide and are significantly influenced by chlorophyll yields per unit phosphorus (Chl/TP), or nitrogen (Chl/TN). Here, the influence of inter-annual hydrometeorological variations on Chl/TP and Chl/TN were evaluated in eutrophic shallow Lake Taihu, China. Our results demonstrated significant increases ( < 0.001) in both Chl/TN and Chl/TP from 2005 to 2017, and increased Chl yields during the winter months were mainly correlated with higher water temperature and longer sunshine hours, which may cause severer blooms in winter and spring. In remaining months from 2005 to 2017, typical associations between atmospheric stilling (or water level elevation) and higher Chl yields were observed. The results also indicate that atmospheric stilling and water level elevation significantly ( < 0.001) decreased background turbidity and promoted buoyant cyanobacterial biomass, alleviating phytoplankton light limitation. Given the subtropical location, eutrophic status, and high background turbidity of Lake Taihu, light may be the critical limiting factor for summer phytoplankton growth; thus, improved light availability would promote Chl yields until self-shading caused further light limitations. If the mechanism is general, promoting the effect of atmospheric stilling on annual peak Chl in shallow lakes may be greatly underestimated, and our finding will affect future bloom mitigation efforts in such systems.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8698560 | PMC |
| http://dx.doi.org/10.3390/biology10121222 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Satellite Tracking Reveals the Speed Up of the Lacustrine Algal Bloom Drift in Response to Climate Change.
Environ Sci Technol
July 2024
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.
Satellite evidence indicates a global increase in lacustrine algal blooms. These blooms can drift with winds, resulting in significant changes of the algal biomass spatial distribution, which is crucial in bloom formation. However, the lack of long-term, large-scale observational data has limited our understanding of bloom drift.
View Article and Find Full Text PDFUncertainty in surface wind speed projections over the Iberian Peninsula: CMIP6 GCMs versus a WRF-RCM.
Ann N Y Acad Sci
November 2023
Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region, Department of Atmospheric Science, Yunnan University, Kunming, China.
This study assessed the projected near-surface wind speed (SWS) changes and variability over the Iberian Peninsula for the 21st century. Here, we compared Coupled Model Intercomparison Project Phase 6 global climate models (GCMs) with a higher spatial resolution regional climate model (RCM; ∼20 km), known as WRF-CESM2, which was created by a dynamic downscaling of the Community Earth System Model version 2 (CESM2) using the Weather Research and Forecasting (WRF) model. Our analysis found that the GCMs tended to overestimate observed SWS for 1985-2014, while the higher spatial resolution of the WRF-CESM2 did not improve the accuracy and underestimated the SWS magnitude.
View Article and Find Full Text PDFImpacts of atmospheric stilling and climate warming on cyanobacterial blooms: An individual-based modelling approach.
Water Res
August 2022
School of Engineering and Built Environment, Griffith University, QLD 4222, Australia.
Harmful algal blooms of the freshwater cyanobacteria genus Microcystis are a global problem and are expected to intensify with climate change. In studies of climate change impacts on Microcystis blooms, atmospheric stilling has not been considered. Stilling is expected to occur in some regions of the world with climate warming, and it will affect lake stratification regimes.
View Article and Find Full Text PDFTemporal dependence of chlorophyll a-nutrient relationships in Lake Taihu: Drivers and management implications.
J Environ Manage
March 2022
Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.
Eutrophication and its associated algal blooms are principal environmental challenges confronting lakes worldwide. The empirical relationships between nutrient (total nitrogen, TN; total phosphorus, TP) and chlorophyll a (Chla) level are widely used as a theoretical basis for lake eutrophication management. Here, seasonal environmental variables and Chla from 2005 to 2020 in Chinese shallow eutrophic Lake Taihu were examined and Chla-nutrient equations in the entire period and annually from 2005 to 2020 were explored using 95% quantile regression model.
View Article and Find Full Text PDFAtmospheric Stilling Promotes Summer Algal Growth in Eutrophic Shallow Lakes.
Biology (Basel)
November 2021
Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
Algal blooms are environmental challenges confronting lakes worldwide and are significantly influenced by chlorophyll yields per unit phosphorus (Chl/TP), or nitrogen (Chl/TN). Here, the influence of inter-annual hydrometeorological variations on Chl/TP and Chl/TN were evaluated in eutrophic shallow Lake Taihu, China. Our results demonstrated significant increases ( < 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!