Water pollution at Lake Natron Ramsar site in Tanzania: A threat to aquatic life

Yona, Clara M.; Makange, M.; Moshiro, E.; Chengula, A.; Misinzo, Gerald

doi:10.1016/j.ecohyd.2022.11.001

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…This is consistent with the findings of a previous study on Lake Victoria [32]. The values of pH, salinity, TDS, EC, and COD were within acceptable WHO standards, whereas turbidity was above the WHO acceptable standards, consistent with previous studies [33].…”

Section: Discussionsupporting

confidence: 93%

Shotgun Metagenomic Analyses of Microbial Assemblages in the Aquatic Ecosystem of Winam Gulf of Lake Victoria, Kenya Reveals Multiclass Pollution

Khatiebi

Kiprotich

Onyando

et al. 2023

BioMed Research International

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Lake Victoria, the second-largest freshwater lake in the world, provides an important source of food and income, particularly fish for both domestic consumption and for export market. In recent years, Lake Victoria has suffered massive pollution from both industrial and wastewater discharge. Microplastic biomes, pharmaceutical residues, drugs of abuse, heavy metals, agrochemicals, and personal care products are ubiquitous in the aquatic ecosystem of Winam Gulf. These pollutants are known to alter microbial assemblages in aquatic ecosystems with far-reaching ramification including a calamitous consequence to human health. Indeed, some of these pollutants have been associated with human cancers and antimicrobial resistance. There is a paucity of data on the microbial profiles of this important but heavily polluted aquatic ecosystem. The current study sought to investigate the metagenomic profiles of microbial assemblages in the Winam Gulf ecosystem. Water and sediment samples were collected from several locations within the study sites. Total genomic DNA pooled from all sampling sites was extracted and analyzed by whole-genome shotgun sequencing. Analyses revealed three major kingdoms: bacteria, archaea and eukaryotes belonging to 3 phyla, 13 classes, 14 families, 9 orders, 14 genera, and 10 species. Proteobacteria, Betaproteobacteria, Comamonadaceae, Burkholdariales, and Arcobacter were the dominated phyla, class, family, order, genera, and species, respectively. The Kyoto Encyclopedia of Genes and Genomes indicated the highest number of genes involved in metabolism. The presence of carbohydrate metabolism genes and enzymes was used to infer organic pollutions from sewage and agricultural runoffs. Similarly, the presence of xylene and nutrotoluene degradation genes and enzyme was used to infer industrial pollution into the lake. Drug metabolism genes lend credence to the possibility of pharmaceutical pollutants in water. Taken together, there is a clear indication of massive pollution. In addition, carbohydrate-active enzymes were the most abundant and included genes in glycoside hydrolases. Shotgun metagenomic analyses conveyed an understanding of the microbial communities of the massively polluted aquatic ecosystem of Winam Gulf, Lake Vicoria, Kenya. The current study documents the presence of multiclass pollutants in Lake Victoria and reveals information that might be useful for a potential bioremediation strategy using the native microbial communities.

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Section: Discussionsupporting

confidence: 93%

Shotgun Metagenomic Analyses of Microbial Assemblages in the Aquatic Ecosystem of Winam Gulf of Lake Victoria, Kenya Reveals Multiclass Pollution

Khatiebi

Kiprotich

Onyando

et al. 2023

BioMed Research International

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“…The migration of many fish species to aquatic environments with optimal climatic conditions has had a tremendous effect on fishermen who are not able to follow the fish due to political borders and economic reasons. These results are in line with the observation by Chengula et al (2022) that climate change has affected fish and their habitats; and that warmer temperatures have affected the abundance, migration, and mortality rate of wild fish stocks. Brander (2010) warned that climate change is likely going to lead to fluctuations in fish stocks, and this is going to have major economic consequences for many vulnerable communities and national economies that heavily depend on fisheries.…”

Section: The Impact Of Climate Change On Coastal Communitiessupporting

confidence: 92%

Trends and Impacts of Climate Change on the Livelihoods of Coastal Communities in North ‘A’ District, Zanzibar

Hamad,

Sawe

2022

Tanzania Journal for Population studies and Development

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This article examines the trends and impacts of climate change on the livelihoods of coastal communities in Zanzibar. The study used both qualitative and quantitative research methodologies. Quantitative data was collected through household questionnaires, while qualitative data was collected through key informants interviews, focus group discussions, observations, and review of documents. Data on rainfall, temperature, and sea level pressure was acquired from the Tanzania Meteorological Authority (TMA) in Zanzibar. Moreover, remote sensing data of the medium-resolution Landsat 8 image was also used. Data was collected from 400 heads of household in the study area. Results show that most of the households admitted that there has been climate change as testified by rise in sea level, increase in temperature, and a decrease in the amount of rainfall. Moreover, the research findings indicate that climate change has affected coastal areas and the livelihoods of the community as a whole. Some of the impacts of climate change have been coastal erosion and destruction of agriculture and fishing activities. Therefore, it is concluded that climate change is a major environmental problem that affects people’s livelihood, especially for those with low adaptive capacity. It is recommended that strong measures be taken to address the problem of climate change. Furthermore, the government should facilitate the realization of global sustainable development goals by addressing the challenges brought forth by climate change through designing policies that aim to create solutions to climate change, and challenges faced in coastal communities such as Zanzibar.

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“…9.14). On the other hand, the elevation of pH values can be explained based on silicate mineral hydrolysis that contains high HCO 3 − and CO 3 2− concentrations (Deocampo & Jones, 2013 ; Yona et al, 2023 ).…”

Section: Resultsmentioning

confidence: 99%

Chemical, biochemical, and bioactivity studies on some soda lakes, Wadi El-Natrun, Egypt

Mahmoud,

Ali,

Abdelkarim

et al. 2024

Environ Monit Assess

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Wadi El-Natrun is one of the most observable geomorphological features in the North-Western Desert of Egypt; it contains several old saline and saline soda lakes. This study investigates physicochemical and biochemical characteristics and estimates the total phenolic content (TPC), total flavonoid content (TVC), and bioactivities of sediment, cyanobacteria, and brine shrimp (Artemia salina) in soda lakes, i.e., El-Hamra Lake 1 (H1) and El-Hamra Lake 2 (H2). These soda lakes are unique extreme ecosystems characterized by high pH (> 9.3), high alkalinity, and salinity. Some extremophilic microorganisms are hosted in this ecosystem. The results revealed that the chemical water type of studied lakes is soda-saline lakes according to the calculated percentage sequence of major cations and anions. Sodium ranked first among major cations with an abundance ratio of e% 58, while chloride came first among anions with an abundance ratio of e% 71, and bicarbonate and carbonate occupied the last rank with an abundance of 6%. The biochemical investigations showed that TPC and TVC are present in concern contents of sediment, cyanobacteria, and brine shrimp (A. salina) which contribute 89% of antioxidant capacity and antimicrobial activities. Thus, this study helps better understand the chemical and biochemical adaptations in soda lake ecosystems and explores natural sources with potential applications in antioxidant-rich products and environmental conservation efforts.

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Water pollution at Lake Natron Ramsar site in Tanzania: A threat to aquatic life

Cited by 8 publications

References 30 publications

Shotgun Metagenomic Analyses of Microbial Assemblages in the Aquatic Ecosystem of Winam Gulf of Lake Victoria, Kenya Reveals Multiclass Pollution

Shotgun Metagenomic Analyses of Microbial Assemblages in the Aquatic Ecosystem of Winam Gulf of Lake Victoria, Kenya Reveals Multiclass Pollution

Trends and Impacts of Climate Change on the Livelihoods of Coastal Communities in North ‘A’ District, Zanzibar

Chemical, biochemical, and bioactivity studies on some soda lakes, Wadi El-Natrun, Egypt

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