Evidences of microplastics in Hawassa Lake, Ethiopia: A first-hand report

Jeevanandam, Malayappa; Talelign, Wegene; Biru, Adane; Sakthi, J.S.; Silva, Judith D.; Saravanan, P.; Jonathan, M.P.

doi:10.1016/j.chemosphere.2022.133979

Cited by 15 publications

(9 citation statements)

References 39 publications

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“…This demonstrates that microplastics from all sources affected both sh species. Our ndings were consistent with a recent study of microplastic pollution along Lake Hawassa's shores (Jeevanandam et al 2022). ).…”

Section: Size Of Mps Detectedsupporting

confidence: 93%

“…According to some research, high quantities of contaminants in industrial, municipal, and hospital wastes enter Lake Hawassa ( Zinabu and Desta 2002;Bekele et al 2021). Concerning microplastic pollution research, only one known case study, Lake Ziway, was explored on MP presence in sh and sediment (Merga et al 2020), and (Jeevanandam et al 2022) on MPS pollution in Lake Hawassa coastal sediment. However, evidence on the occurrence and extent of pollution of MPs in Ethiopian lakes, particularly Lake Hawassa, is still rare.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of microplastics in commercial fish species from the Ethiopian rift valley's Lake Hawassa, Ethiopia

Demsie

Yimer

2023

Preprint

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Microplastics (MPs) have recently been detected as emergent pollutants in the Ethiopian rift valley lakes located close to rapidly expanding towns. We provide the first study of MPs ingestion of commercial fish species from Lake Hawassa, Ethiopia: Catfish (Clarias gariepinus) and Nile Tilapia (Oreochromis niloticus). A total of 60 individual fish species was collected from three sampling sites of lake Hawassa in October 2020. Across all sampling sites, there was a significant difference in ingested MPs between benthic omnivore catfish and pelagic Phyto planktivorous Tilapia (χ2 = 15.864, p < 0.001). The most common size of ingested MPs (84.6%) was 0.5-1 mm, with fragments (59.5%) dominating, followed by fibers (25.4%). On average, 4.03 ± 1.33 MPs with sizes ranging between 60 µm and 10.53 mm were detected per individual. White and yellow MPs were particularly numerous, accounting for 36.8% and 26.4% of the total, respectively. Because Lake Hawassa's fishery is so significant, the potential impact of MP pollution on the lake biota in general, and economically valuable fish species in particular, deserves attention, additional research, and, if possible, early mitigation.

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Section: Size Of Mps Detectedsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Occurrence of microplastics in commercial fish species from the Ethiopian rift valley's Lake Hawassa, Ethiopia

Demsie

Yimer

2023

Preprint

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“…In fact, when combined, black/grey, blue and red colours accounted for the majority of microfibres found. The recurring abundance of these three colours in almost all locations is in line with that of other anthropogenic studies (Nel and Froneman, 2015;Suaria et al, 2020;Li et al, 2021;Jeevanandam et al, 2022). Forensic studies of microfibres prevalence on various surfaces where textile fibres are shed such as seats (Cantrell et al, 2001), head hair (Palmer and Oliver, 2004) and on skin (Palmer and Burch, 2009) have also shown the high prevalence of these colours.…”

Section: Colour Distributionsupporting

confidence: 87%

“…A recent review noted that only three studies were found that had investigated anthropogenic microfibres on the African continent making it the least studied continent on the planet (Athey and Erdle, 2021). Despite data showing the prevalence of microfibres in creeks, lakes and zooplankton (Kosore et al, 2018;Kerubo et al, 2020Kerubo et al, , 2021Jeevanandam et al, 2022), these studies have concentrated on methodologies that do not account for the presence of natural microfibres, which serves only to further widen the knowledge gap and misunderstanding.…”

Section: Introductionmentioning

confidence: 99%

Prevalence and characterisation of microfibres along the Kenyan and Tanzanian coast

Kechi-Okafor

Khan²,

Al-Naimi³

et al. 2023

Front. Ecol. Evol.

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Microplastic pollution is ubiquitous, with textiles being a major source of one of the dominant microplastic types—microfibres. Microfibres have been discovered in the aquatic environment and marine biota, demonstrating direct infiltration in the environment. However, the impact of non-plastic microfibres has been overlooked until recently despite their prevalence and the ecotoxicological risk posed by chemical dyes and finishes used during processing. During an expedition from Lamu to Zanzibar (East Africa), a citizen science strategy was employed to innovate, educate and influence microfibre pollution reform through the Flipflopi project, a circular economy effort to stop the use of single-use plastic. Simple sampling methods were developed to replace costly equipment, which local citizens could use to partake in the collection and sampling of surface water samples from the previously understudied Kenyan and Tanzanian coast. To maintain the reliability of samples and to minimise contamination, a forensic science strategy was embedded throughout the methodology of the study, collection and analysis of the samples. A total of 2,403 microfibres from 37 sites were recovered and fully characterised with 55% found to be of natural origin, 8% regenerated cellulosic and 37% synthetic microfibres. Natural microfibres were in higher abundance in 33 of the 37 sampled sites. Congruent with recent studies, these findings further support the need for greater understanding of the anthropogenic impact of natural microfibres.

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“…There is increased research interest in microplastic contamination worldwide because microplastic pollution has become a major global concern (Jeevanandam et al, 2022). In the field of environmental and ecological science research, microplastic pollution is currently ranked as the second largest scientific problem (Fang, 2021).…”

Section: Microplastic Distribution In Kenya's Surface Watersmentioning

confidence: 99%

Decadal Assessment of Microplastics, Pharmaceuticals, and Pesticides as Contaminants of Emerging Concern in Kenya's Surface Waters: A Review

Githaiga

Njuguna

Bargul

et al. 2023

Enviro Toxic and Chemistry

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Studies investigating microplastics, pharmaceuticals, and pesticides as contaminants of emerging concern (CECs) in surface water sources in Kenya are reviewed. Contaminants of emerging concern are chemicals that have recently been discovered that may pose a threat to the environment, aquatic life, and human life. Microplastics in surface waters range from 1.56 to as high as 4520 particles/m3, with high concentrations recorded in coastal waters. The dominant microplastics are fibers, fragments, and films, with foams, granules, and pellets making up only a small percentage. The main source of pharmaceuticals in water sources is not wastewater‐treatment plants but rather raw untreated sewage because high concentrations are found near informal settlements with poor sewage connectivity. Antibiotics are detected in the range of the limit of quantification to 320 μg/L, with sulfamethoxazole, trimethoprim, and ciprofloxacin being the most abundant antibiotics. The high frequency of detection is attributed to the general misuse of antibiotics in the country. A health risk assessment indicated that only ciprofloxacin and acetaminophen posed noncarcinogenic health risks in the Ndarugo River and Mombasa periurban creeks, respectively. Similarly, the detection of antiretroviral drugs, mainly lamivudine, nevirapine, and zidovudine, is associated with human immunodeficiency virus prevalence in Kenya. In the Lake Naivasha, Nairobi River, and Lake Victoria basins, frequently detected organochloride pesticides (OCPs) are methoxychlor, alachlor, endrin, dieldrin, endosulfan, endosulfan sulfate, α‐hexachlorocyclohexane (α‐HCH), γ‐HCH, and dichlorodiphenyltrichloroethane (DDT), some of which occur above permissible concentrations. The presence of DDT in some sites translates to illegal use or historical application. The majority of individual OCPs posed no noncarcinogenic health risk, except dieldrin and aldrin which had a hazard quotient >1 in two sites. Therefore, more surveying and regular monitoring in different regions in Kenya concerning CECs is essential to determine the spatial variability and effective measures to be taken to reduce pollution. Environ Toxicol Chem 2023;00:1–14. © 2023 SETAC.

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Evidences of microplastics in Hawassa Lake, Ethiopia: A first-hand report

Cited by 15 publications

References 39 publications

Occurrence of microplastics in commercial fish species from the Ethiopian rift valley's Lake Hawassa, Ethiopia

Occurrence of microplastics in commercial fish species from the Ethiopian rift valley's Lake Hawassa, Ethiopia

Prevalence and characterisation of microfibres along the Kenyan and Tanzanian coast

Decadal Assessment of Microplastics, Pharmaceuticals, and Pesticides as Contaminants of Emerging Concern in Kenya's Surface Waters: A Review

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