C-N-P driven changes to phytoplankton community structure and gross primary productivity in river-fed reservoir ecosystems on the Chinese Loess Plateau

Shao, Mingyu; Liu, Zaihua; Sun, Hailong; Lai, Chaowei; Ma, Zhen; He, Xuejun; Yan, F.; Chai, Qinong

doi:10.1016/j.jhydrol.2022.128781

Cited by 10 publications

(5 citation statements)

References 86 publications

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“…GPP during the P2 dry seasons was also less prone to be photoinhibited and more prone to be light saturated. These findings may be explained by variables not considered in this study, such as phytoplankton composition and stoichiometry (Shao et al, 2023).…”

Section: Water Loss Water Chemistry and Metabolic Ratesmentioning

confidence: 77%

Post-drought leads to increasing metabolic rates in the surface waters of a natural tropical lake

Brighenti,

Viana,

Pujoni

et al. 2024

Front. Geochem.

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As hotspots of the global carbon cycle, lakes can regulate climate change while being regulated by it via a feedback loop. As ecosystem metabolism is considered to be a sentinel to these changes, we used high-frequency measurements and the inverse modeling approach to study the temporal dynamic of gross primary production (GPP), respiration (R), and net ecosystem production (NEP) at surface waters of a tropical lake, which lost about 60% of its volume in almost 10 years. This water loss and the return of the average rainfall led to an increased concentration of nitrogen, phosphorus, and dissolved organic carbon and decreased water transparency and light availability. During the post-drought period, epilimnetic GPP increased by 40% compared with the pre-drought period, and R surpassed GPP during the mixing period of the lake. We discuss that this modification results from higher carbon and nutrient concentrations, lower light availability, and a change in the lake stratification pattern. Surface water metabolism changed due to meteorological and hydrological drought, and it may continue to change under the ongoing variation in rainfall patterns, temperature, and human disturbances.

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Section: Water Loss Water Chemistry and Metabolic Ratesmentioning

confidence: 77%

Post-drought leads to increasing metabolic rates in the surface waters of a natural tropical lake

Brighenti,

Viana,

Pujoni

et al. 2024

Front. Geochem.

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“…The THg in the water passing through a 0.45 μm filter is defined as DHg; subtracting the DHg from the THg yields the concentration of PHg in the water [ 34 ]. The anions and cations were analyzed by automated Dionex ICS-90 ion chromatography (Dionex, Sunnyvale, CA, USA) and an inductively coupled plasma optical emission spectrometer (ICP-OES, Varian, Palo Alto, CA, USA), respectively [ 38 ].…”

Section: Methodsmentioning

confidence: 99%

Mercury Biogeochemical Cycle in Yanwuping Hg Mine and Source Apportionment by Hg Isotopes

Jin

Yan

Ali

et al. 2023

Toxics

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Although mercury (Hg) mining activities in the Wanshan area have ceased, mine wastes remain the primary source of Hg pollution in the local environment. To prevent and control Hg pollution, it is crucial to estimate the contribution of Hg contamination from mine wastes. This study aimed to investigate Hg pollution in the mine wastes, river water, air, and paddy fields around the Yanwuping Mine and to quantify the pollution sources using the Hg isotopes approach. The Hg contamination at the study site was still severe, and the total Hg concentrations in the mine wastes ranged from 1.60 to 358 mg/kg. The binary mixing model showed that, concerning the relative contributions of the mine wastes to the river water, dissolved Hg and particulate Hg were 48.6% and 90.5%, respectively. The mine wastes directly contributed 89.3% to the river water Hg contamination, which was the main Hg pollution source in the surface water. The ternary mixing model showed that the contribution was highest from the river water to paddy soil and that the mean contribution was 46.3%. In addition to mine wastes, paddy soil is also impacted by domestic sources, with a boundary of 5.5 km to the river source. This study demonstrated that Hg isotopes can be used as an effective tool for tracing environmental Hg contamination in typical Hg-polluted areas.

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“…Sehingga dengan tersedianya biomassa tumbuhan dan oksigen yang cukup tersebut dapat mendukung perkembangan ekosistem perairan (Paserang, 2020). Perubahan produktivitas perairan yang di akibatkan oleh nutrient terutama Nitrat dan Phosphat sangat penting dalam penanganan eutrofikasi dalam mengoptimalkan tingkat penyerapan karbon (Eimers et al, 2023;Shao et al, 2023).…”

Section: Pendahuluanunclassified

Status Trofik Perairan Danau Laguna, Kota Ternate Selatan, Maluku Utara

Samman,

Sabar,

Abjan Fabanjo

et al. 2024

JPPIK

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Water quality and trophic status of waters play an important role in aquaculture activities because they will affect the growth process of cultivated fish, if the water quality and trophic status are low then they can support aquaculture activities in the waters of Laguna Lake, South Ternate City. The purpose of this study was to determine the water quality and trophic status in the waters of Laguna Lake in supporting and supporting freshwater aquaculture activities. The research method used in this research is descriptive qualitative, the results of air analysis are described based on Class and Water Quality Standards, while the trophic status is estimated based on Carlson, 1977. The results of the analysis show that the water quality in Laguna Lake is still in accordance with Class II Quality Standards. PP No. 22 of 2021, while the trophic level status in Laguna Lake is also classified in the oligotrophic category, namely TSI <40, TSI in Laguna Lake waters ranges from 20.69-23.28. Based on the results of the analysis of water quality and trophic status, it was found that the waters of Laguna Lake are still good and can support freshwater fish farming activities

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C-N-P driven changes to phytoplankton community structure and gross primary productivity in river-fed reservoir ecosystems on the Chinese Loess Plateau

Cited by 10 publications

References 86 publications

Post-drought leads to increasing metabolic rates in the surface waters of a natural tropical lake

Post-drought leads to increasing metabolic rates in the surface waters of a natural tropical lake

Mercury Biogeochemical Cycle in Yanwuping Hg Mine and Source Apportionment by Hg Isotopes

Status Trofik Perairan Danau Laguna, Kota Ternate Selatan, Maluku Utara

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