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Assessment and Management of Lake Eutrophication
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Assessment and Management of Lake Eutrophication

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 4487

Special Issue Editor

Prof. Dr. Shengrui Wang

E-Mail Website
Guest Editor
College of Water Sciences, Beijing Normal University, Beijing 100875, China
Interests: nitrogen; phosphorus; organic matter; dynamics; lake
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Lake eutrophication is an international problem, and its assessment and management are an important topic. In recent years, relevant research has mainly focused on the biogeochemical process of nitrogen and phosphorus, the mechanism and process of lake eutrophication, the evolution of lake water environment and the assessment of eutrophication, the comprehensive management and regulation of the lake basin, especially for the reduction in lake nutrients, and the comprehensive management and protection of the lake basin based on process analysis. Research on the multilevel ecological barrier of the lake basin and the construction of a comprehensive management system and management system for the lake basin has achieved impressive results. Focused on the theme of assessment and management of lake eutrophication, this Special Issue will summarize and publish the latest research results in an attempt to promote the study of lake eutrophication.

Prof. Dr. Shengrui Wang
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • lake eutrophication
  • biogeochemical process
  • nitrogen and phosphorus
  • assessment
  • management
  • mechanism
  • comprehensive management
  • protection of lake basin
  • lake water environment

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Published Papers (2 papers)

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Research

17 pages, 4641 KiB  
Article
Limnological Response of Las Curias Reservoir, San Juan, Puerto Rico: Successful Management of the Invasive Aquatic Fern, Salvinia molesta
by Xavier A. García-López, Jorge R. Ortiz-Zayas, Rodrigo Díaz, Aurelio Castro-Jiménez and Charles F. Wahl
Water 2023, 15(22), 3966; https://doi.org/10.3390/w15223966 - 15 Nov 2023
Cited by 2 | Viewed by 1825
Abstract
The anthropogenic deterioration of aquatic ecosystems affects water resources due to agricultural malpractices, pollution from domestic septic tanks, recreational activities, and poor watershed management, among other factors. This study examines the management of Las Curias Reservoir, San Juan, Puerto Rico, after the 2016 [...] Read more.
The anthropogenic deterioration of aquatic ecosystems affects water resources due to agricultural malpractices, pollution from domestic septic tanks, recreational activities, and poor watershed management, among other factors. This study examines the management of Las Curias Reservoir, San Juan, Puerto Rico, after the 2016 arrival of the invasive aquatic fern Salvinia molesta. In September 2019, a community-led initiative introduced the Cyrtobagous salviniae weevil, an effective biological control agent for S. molesta, and commenced a mechanical removal campaign using an aquatic harvester. Limnological sampling (September 2019 to September 2022) and drone flights were employed to measure physicochemical and floating plant cover changes, respectively, in the reservoir. Monitoring of weevils in the reservoir demonstrated rapid establishment and dispersal, which resulted in visible damage including browning of plants and eventually sinking of entire mats. From 23 July 2019, the reservoir surface was predominantly covered by salvinia, occupying an area of 17.7 ha (100% coverage). This coverage decreased to 12.6 ha (71%) by 29 January 2021. By 12 August 2022, the coverage had been substantially reduced to just 1.1 ha, representing only 6% of the reservoir surface. In 2022, the reservoir recorded an average dissolved oxygen concentration of 2.4 mg L−1 (±0.0, n = 144), the highest in the study period and indicative of ecosystem recovery. After three years of control efforts, dissolved oxygen, pH, and specific conductance returned to levels recorded prior to Salvinia molesta introduction. This ecosystem recovery, a first in Puerto Rico, could be attributed to early use of mechanical control and the long-term impact of biological control. Full article
(This article belongs to the Special Issue Assessment and Management of Lake Eutrophication)
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19 pages, 5107 KiB  
Article
Sediment Heavy Metal Pollution Assessment in Changwang and Wuyuan Rivers in Hainan Island, China
by Edwine Yongo, Fangfang Jin, Eunice Mutethya, Di Wu, Pengfei Zhang and Zhiqiang Guo
Water 2023, 15(8), 1580; https://doi.org/10.3390/w15081580 - 18 Apr 2023
Cited by 11 | Viewed by 2317
Abstract
Heavy metal pollution may pose a significant threat to aquatic ecosystems. To assess heavy metal pollution, sediment samples were collected from Changwang and Wuyuan Rivers between June and December 2019. An inductively coupled plasma mass spectrometer was used to analyze the concentrations of [...] Read more.
Heavy metal pollution may pose a significant threat to aquatic ecosystems. To assess heavy metal pollution, sediment samples were collected from Changwang and Wuyuan Rivers between June and December 2019. An inductively coupled plasma mass spectrometer was used to analyze the concentrations of As, Cd, Co, Cr, Cu, Mn, Ni, Pb, and Zn. The results revealed that Changwang River had significantly high concentrations of Cr (240.70 mg kg−1), Co (36.02 mg kg−1), Ni (108.70 mg kg−1), and Cu (36.61 mg kg−1), whereas As (7.55 mg kg−1) was elevated in Wuyuan River. In addition, Cd, As, Pb and Zn concentrations were below China’s sediment quality standard limits (GB 3838-2002), but the Cr level exceeded the limit. However, Cr and Ni exceeded the probable effect concentrations (PEC) and thus may cause toxic effects. The contamination factor, geo-accumulation index, and modified degree of contamination revealed that Changwang experienced considerable to very high heavy metal pollution, while Wuyuan had low to moderate pollution. The pollution load index demonstrated that the rivers were polluted during all seasons. Additionally, the risk index showed considerable and moderate risks in Changwang and Wuyuan, respectively. The metal ecological risk was ranked as Cd > Ni > As > Co > Cu > Cr > Mn > Pb > Zn. Multivariate analyses categorized heavy metals into two groups based on their potential sources: group one included Cr, Co, Ni, Cu, Mn, and Zn, while group two contained As, Cd, and Pb. The study provides valuable data on heavy metal pollution, which needs improvement for the studied rivers. The data can be used to assess pollution risks and manage riverine sediment quality. Full article
(This article belongs to the Special Issue Assessment and Management of Lake Eutrophication)
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