Retrieval of Chla Concentrations in Lake Xingkai Using OLCI Images DOI Creative Commons
Li Fu,

Yaming Zhou,

Ge Liu

et al.

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(15), P. 3809 - 3809

Published: July 31, 2023

Lake Xingkai is a large turbid lake composed of two parts, Small and Big Xingkai, on the border between Russia China, where it represents vital source water, fishing, water transport, recreation, tourism. Chlorophyll-a (Chla) prominent phytoplankton pigment proxy for biomass, reflecting trophic status waters. Regularly monitoring Chla concentrations issuing timely warnings this lake’s eutrophication. Owing to its higher spatial temporal coverages, remote sensing can provide synoptic complement traditional measurement methods by targeting optical absorption signals, especially lakes that lack regular in situ sampling cruises, like Xingkai. This study calibrated validated several commonly used retrieval algorithms (including two-band ratio, three-band method, four-band baseline methods) applying them Sentinel-3 Ocean Land Colour Instrument (OLCI) images Among these algorithms, model (FBA), which removes signal detritus colored dissolved organic matter, was best-performing with an R2 0.64 mean absolute percentage difference 38.26%. With FBA applied OLCI images, monthly distributions were studied from 2016 2022. The results showed over seven years, than Unlike other eutrophic China (e.g., Taihu Chaohu), did not display stable seasonal variation pattern. We also found uncertainties limitations algorithm models when using larger satellite zenith angle or algal bloom area. Recent increases anthropogenic nutrient loading, clarity, warming temperatures may lead rising biomass be satellite-based quality.

Language: Английский

Lakes in Hot Water: The Impacts of a Changing Climate on Aquatic Ecosystems DOI Creative Commons
R. Iestyn Woolway,

Sapna Sharma,

John P. Smol

et al.

BioScience, Journal Year: 2022, Volume and Issue: 72(11), P. 1050 - 1061

Published: July 18, 2022

Abstract Our planet is being subjected to unprecedented climate change, with far-reaching social and ecological repercussions. Below the waterline, aquatic ecosystems are affected by multiple climate-related anthropogenic stressors, combined effects of which poorly understood rarely appreciated at global stage. A striking consequence change on that many experiencing shorter periods ice cover, as well earlier longer summer stratified seasons, often result in a cascade environmental consequences, such warmer water temperatures, alterations lake mixing levels, declines dissolved oxygen, increased likelihood cyanobacterial algal blooms, loss habitat for native cold-water fisheries. The repercussions changing include impacts freshwater supplies, quality, biodiversity, ecosystem benefits they provide society.

Language: Английский

Citations

149
Nitrous oxide emission in altered nitrogen cycle and implications for climate change DOI
Babita Aryal,

Roshni Gurung,

Aline Frumi Camargo

et al.

Environmental Pollution, Journal Year: 2022, Volume and Issue: 314, P. 120272 - 120272

Published: Sept. 24, 2022

Language: Английский

Citations

76
Blooms also like it cold DOI Creative Commons
Kaitlin L. Reinl, Ted D. Harris, Rebecca L. North

et al.

Limnology and Oceanography Letters, Journal Year: 2023, Volume and Issue: 8(4), P. 546 - 564

Published: Feb. 17, 2023

Abstract Cyanobacterial blooms have substantial direct and indirect negative impacts on freshwater ecosystems including releasing toxins, blocking light needed by other organisms, depleting oxygen. There is growing concern over the potential for climate change to promote cyanobacterial blooms, as positive effects of increasing lake surface temperature growth are well documented in literature; however, there evidence that also being initiated persisting relatively cold‐water temperatures (< 15°C), ice‐covered conditions. In this work, we provide review abiotic drivers physiological adaptations leading these offer a typology lesser‐studied discuss their occurrence under changing

Language: Английский

Citations

62
What makes a cyanobacterial bloom disappear? A review of the abiotic and biotic cyanobacterial bloom loss factors DOI Creative Commons
Ted D. Harris, Kaitlin L. Reinl, M. Azarderakhsh

et al.

Harmful Algae, Journal Year: 2024, Volume and Issue: 133, P. 102599 - 102599

Published: Feb. 9, 2024

Cyanobacterial blooms present substantial challenges to managers and threaten ecological public health. Although the majority of cyanobacterial bloom research management focuses on factors that control initiation, duration, toxicity, geographical extent, relatively little role loss processes in how these are regulated. Here, we define a process terms population dynamics as any removes cells from population, thereby decelerating or reducing development extent blooms. We review abiotic (e.g., hydraulic flushing oxidative stress/UV light) biotic allelopathic compounds, infections, grazing, resting cells/programmed cell death) known govern loss. found dominant depend several system specific including genera-specific traits, situ physicochemical conditions, microbial, phytoplankton, consumer community composition. also address context discuss perspectives predicting changing climate may directly indirectly affect A deeper understanding their underlying mechanisms help mitigate negative consequences improve current strategies.

Language: Английский

Citations

21
Cyanobacteria and Cyanotoxins in a Changing Environment: Concepts, Controversies, Challenges DOI Open Access
Ingrid Chorus,

Jutta Fastner,

Martin Welker

et al.

Water, Journal Year: 2021, Volume and Issue: 13(18), P. 2463 - 2463

Published: Sept. 7, 2021

Concern is widely being published that the occurrence of toxic cyanobacteria increasing in consequence climate change and eutrophication, substantially threatening human health. Here, we review evidence pertinent publications to explore which types waterbodies likely exacerbate cyanobacterial blooms; whether controlling blooms toxin concentrations requires a balanced approach reducing not only phosphorus (P) but also those nitrogen (N); how trophic climatic changes affect health risks caused by cyanobacteria. We propose following for further discussion: (i) Climate promote some waterbodies—not with low P or N stringently limiting biomass, more so shallow than stratified waterbodies. Particularly latter, it can work both ways—rendering conditions proliferation favourable less favourable. (ii) While emissions environment need be reduced number reasons, definitely successful P, provided brought down levels sufficiently limit biomass. Not N:P ratio, absolute concentration nutrient determines maximum possible biomass phytoplankton thus The show two nutrients currently choice reduce if achieving has chances success. (iii) Where cause longer, stronger frequent blooms, they increase exposure, depend on amount exceed current WHO cyanotoxin guideline values respective exposure situation. reduces epilimnion, transparency, species composition may shift reside benthic surfaces metalimnion, changing exposure. conclude studying environmental genotype populations relatively new exciting research field, holding promises understanding biological function wide range metabolites found cyanobacteria, small fraction humans. Overall, management needs case-by-case assessments focusing impacts waterbody, rather generalisations.

Language: Английский

Citations

100
A critical review on operation and performance of source water control strategies for cyanobacterial blooms: Part II-mechanical and biological control methods DOI Creative Commons
Faith A. Kibuye, Arash Zamyadi, Eric C. Wert

et al.

Harmful Algae, Journal Year: 2021, Volume and Issue: 109, P. 102119 - 102119

Published: Oct. 22, 2021

This review summarizes current knowledge on mechanical (artificial mixing, hypolimnetic aeration, dredging, and sonication) biological (biomanipulation, macrophytes, straws) methods for the management of cyanobacterial blooms in drinking water sources. Emphasis has been given to (i) mechanism control, (ii) successful unsuccessful case studies, (iii) factors influencing implementation. Most control strategies offer long-term control. However, their application can be cost-prohibitive treatment efficacy is influenced by source geometry continual nutrient inputs from external When artificial mixing oxygenation units are optimized based characteristics, observed quality benefits included increased dissolved oxygen contents, reduced internal loading nutrients, lower concentrations ions . Treatment during aeration was derailed excessive sedimentation organic matter sediment characteristics such as low Fe/P ratios. Dredging beneficial contaminated removal, but it too costly a practical bloom strategy most systems. Sonication have contradictory findings requiring further research evaluate applicability field-scale cyanobacteria. Biological biomanipulation benefits; however, investigations mechanisms still limited, particularly with use macrophytes straws. Each method site-specific strengths, limitations, ecological impacts. Reduction should significant focus restoration efforts were commonly offset continued inputs.

Language: Английский

Citations

73
Nutrients and not temperature are the key drivers for cyanobacterial biomass in the Americas DOI
Sylvia Bonilla, Anabella Aguilera, Luis Aubriot

et al.

Harmful Algae, Journal Year: 2022, Volume and Issue: 121, P. 102367 - 102367

Published: Dec. 16, 2022

Language: Английский

Citations

54
The role of organic nutrients in structuring freshwater phytoplankton communities in a rapidly changing world DOI Creative Commons
Kaitlin L. Reinl, Ted D. Harris, Inge Elfferich

et al.

Water Research, Journal Year: 2022, Volume and Issue: 219, P. 118573 - 118573

Published: May 11, 2022

Carbon, nitrogen, and phosphorus are critical macroelements in freshwater systems. Historically, researchers managers have focused on inorganic forms, based the premise that organic pool was not available for direct uptake by phytoplankton. We now know phytoplankton can tap nutrient through a number of mechanisms including uptake, enzymatic hydrolysis, mixotrophy, symbiotic relationships with microbial communities. In this review, we explore these considering current projected future anthropogenically-driven changes to particular, focus how naturally- anthropogenically- derived nutrients influence community structure. also synthesize knowledge gaps regarding physiology potential challenges management an organically dynamic anthropogenically modified world. Our review provides basis exploring topics suggests several avenues work relation between eutrophication their ecological implications

Language: Английский

Citations

50
Cyanobacterial Blooms in Environmental Water: Causes and Solutions DOI
Manogaran Lakshmikandan, Ming Li, Baozhu Pan

et al.

Current Pollution Reports, Journal Year: 2024, Volume and Issue: 10(4), P. 606 - 627

Published: July 19, 2024

Language: Английский

Citations

12
Cycles of solar ultraviolet radiation favor periodic expansions of cyanobacterial blooms in global lakes DOI
Mengmeng Wang,

Wanchao Bian,

Ximeng Qi

et al.

Water Research, Journal Year: 2024, Volume and Issue: 255, P. 121471 - 121471

Published: March 13, 2024

Language: Английский

Citations

9