Comparative Study on the Determination of Chlorophyll-a in Lake Phytoplankton by a YSI Multi-Parameter Water Quality Meter and Laboratory Spectrophotometric Method

Water, Год журнала: 2024, Номер 16(10), С. 1350 - 1350

Опубликована: Май 9, 2024

Algal blooms caused by eutrophication are a major global problem, and the monitoring prediction of algal densities in lakes important indicators management. However, reliability commonly used chlorophyll-a (Chl-a) to characterize phytoplankton density lake environments needs be further investigated. In this paper, we sampled analyzed 365 samples from nine plateau Yunnan Province during dry rainy seasons. The Chl-a data measured laboratory spectrophotometric method portable YSI multi-parameter water quality meter (YSI) directly field were compared, regression analysis correlation with performed. Most values instrument greater than those YSI, between two methods was weak (0.492, p < 0.001). reached 0.67 (p 0.001) season, while measure may have led an overestimation due nonspecific sources Chl-a. both relatively inaccurate for characterizing density. For different trophic states lakes, nutrient concentration changes affect phytoplankton. During seasons, fluorescence intensity response environmental conditions prevent results reflecting authentic Furthermore, high species diversity can lead inconsistent because content individual cells is different. relationship specific. Therefore, when applying it necessary consider conditions, community structure other practical conditions. addition, analytical instrumental techniques instruments need improved.

Язык: Английский

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Response of changes in lake area to drought and land use change

The Science of The Total Environment, Год журнала: 2024, Номер 947, С. 174638 - 174638

Опубликована: Окт. 1, 2024

Язык: Английский

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PGPR Promotes the Recovery of Submerged Macrophytes via Indigenous Microbiome Modulations under Combined Abiotic Stress

Water, Год журнала: 2023, Номер 15(3), С. 590 - 590

Опубликована: Фев. 2, 2023

The restoration of submerged macrophytes is commonly limited by abiotic stress. Here, we isolated PGPR strains from the rhizosphere using ACC deaminase selective medium, and evaluated their growth promoting effects on Vallisneria natans (V. natans) under low light intensity (or) high sediment organic matter load, also explored indigenous microbiome response V. seedlings to inoculants. Ten isolates were chosen 252 based activity production IAA siderophore. M1 (Pseudomonas vancouverensis) E15 (Enterobacter ludwigii) had best stress double shoot height increased 36% 46%, respectively. results analysis showed that inoculants could regulate relative abundance unclassified_f_Enterobacteriaceae improve α-diversity bacterial community. Under inoculation obviously shifted β-diversity communities promote early natans. This study expands application plant–microbe interaction in field freshwater ecological restoration.

Язык: Английский

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Total nitrogen and pH are key variables for functional structure of zooplanktonic communities in an agropastoral landscape

The Science of The Total Environment, Год журнала: 2023, Номер 891, С. 164031 - 164031

Опубликована: Май 10, 2023

Язык: Английский

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Incorporating carbon sequestration into lake management: A potential perspective on climate change

The Science of The Total Environment, Год журнала: 2023, Номер 895, С. 164939 - 164939

Опубликована: Июнь 20, 2023

Язык: Английский

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