Freshwater insects of different feeding guilds ingest microplastics in two Gulf of Guinea tributaries in Nigeria

Akindele, Emmanuel O.; Ehlers, Sonja M.; Koop, Jochen H. E.

doi:10.1007/s11356-020-08763-8

Cited by 80 publications

(50 citation statements)

References 28 publications

(42 reference statements)

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“…This is due to having negligible drawbacks for the damage of MP particles. Another report found that a combination of different chemicals; hydrogen peroxide with alkaline base (H 2 O 2 with KOH) were used for the oxidation of impurities (Akindele et al 2020 ), and the purification of MP particles from the matrix (Tata et al 2020 ) in different samples. A critical selection of the oxidizing agents is an important issue for the effective detection of all the MP particles and components that only degrades the organic matter without degrading plastics.…”

Section: Sampling Techniques Mps Preparations and Detection Methodsmentioning

confidence: 99%

“…However other infrequent shapes, such as pellets, irregular shapes, spheres are originated from different commercial goods and transportations, especially occurred in the municipality (Fred-Ahmadu et al 2020 ). The high percentage of filaments, fragments, and fibers particularly were recorded within fish (Adeogun et al 2020 ), larvae (Akindele et al 2020 ), and insect (Dahms et al 2020 ) samples. Spheres and sheet MP percentage abundant were observed in a small proportion as compared with other shapes.…”

Section: Physical and Structural Characteristics Of Microplastics In The African Water Systemmentioning

confidence: 99%

“…; PS, ABS for Siphlonurus sp. PS, PP FOR, and L. Viridis Akindele et al ( 2020 ) Urban stream 53-4000 μm Filaments (76.3%), round (6.3%), angular ( 2.9%) and other shaped objects (14.3%) for water samples; Filaments (95.0%), angular (3.6%), round (0.4%), other shapes (1.0%) for larvae filaments (19%), round (11%), angular (0.9%) and (68%) for sediment samples Transparent white (30%), blue (29%), black (21%) and others for water sample; Blue (37.4%), black (23.5%), red (13.2%), transparent white (3.9%), green (2.9%) and other colors (19.0%), for larva samples; Transparent/white (80%), black (7.9%), blue (5.7%), green (0.3%) and others (4.9%) for sediment samples – Dahms et al ( 2020 ) The Gulf of Guinea from the tropical Atlantic Ocean 1–5 mm 5% pellets, 33% foam fragments, 4% fibers and 58% hard fragments white, pink, green, black, blue, clear (transparent), and yellow PE, PP, PVC, PA, PS, PU, EVA, ABS, and PET Fred-Ahmadu et al ( 2020 ) Lake Ziway 0.15-40 mm Pellets and fibers – Dominantly PP, PE, and alkyd-varnish. PU, PS, PE/PP cop, PET, SR, SA, PMMA, PA, CPH, and ACR in a small proportion Merga et al ( 2020 ) East coast of South Africa 0.1 to 4.8 mm, averaging 0.89 ± 0.77 mm Fibers (68%), fragments (21%), and others (11%) Dominantly blue.…”

Section: Physical and Structural Characteristics Of Microplastics In The African Water Systemmentioning

confidence: 99%

“…The different abundance in those species is due to their feeding preference of the specific properties (Biginagwa et al 2016 ). In the Ogun and Osun rivers, the MP abundance in different insect samples was observed as 43.29 ± 43.29; 62.36 ± 3.53; 291.76 ± 26.55 particles/species for the three different species (Akindele et al 2020 ). MP observed with varied order of insects is due to different feeding tells than aquatic faunas of different taxonomic and /or ecological niches could be likely on MP pollutants.…”

Section: The Occurrence Of Microplastics In African Countries Aquatic Systemsmentioning

confidence: 99%

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Microplastic pollution in African countries’ water systems: a review on findings, applied methods, characteristics, impacts, and managements

Aragaw

2021

SN Appl. Sci.

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Owed to their simplicity, flexibility, lightweight, and low cost, plastics have become highly demanded in Africa as well as worldwide. However, the management of plastic wastes, particularly in African countries, is inadequate and most of the plastic debris is gatewayed into the water bodies. Nowadays, environmentalists, organizations, and governments are aware of microplastic pollution in the marine and terrestrial environment. Thus, addressing a compressive literature review in one referenced paper, as they draw up the articles, is essential to propose new research directions, to synthesize the existing theories among the existing studies. The abundance of microplastics is variable depending on the sampling and identification techniques. In this review, the available publications on microplastic pollution in African countries’ water systems were retrieved. Investigations found that microplastic pollution levels in the studied water bodies were reported in high concentrations. It was observed that different sampling and analytical methods were applied for the detection of microplastics, and suggestions were raised at it may affect the reliability of the results. Most of the detected and quantified microplastics were confirmed as they are from secondary sources. Most of the microplastic pollution research was conducted dominantly in South Africa, and secondly Nigeria, although other countries should also start conducting in their water systems. Surface water and sediment samples were dominantly carried out, but are limited with biota samples; hence, the risk assessment of microplastics is not yet determined. Some of the African countries have regulations on the prevention of macroplastic wastes, but the implementations are unsuccessful and most have not yet been established resulting in a threat of microplastics pollution. Thus, the research priorities on microplastic detection should be identified, and the African countries’ governments should be more proactive in eradicating macroplastic, which ends up as microplastics, pollutions in the water environments. Graphic abstract Article Highlights Researches on microplastic pollution in African countries water system is limited . A high microplastics abundance is found in African countries water system. Sampling methods and used analytical techniques for microplastic detection were included. Harmonized standard methods for microplastic pollution research should be established. Combined analytical tools at once should be adopted to detect reliable microplastics.

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Section: Sampling Techniques Mps Preparations and Detection Methodsmentioning

confidence: 99%

Section: Physical and Structural Characteristics Of Microplastics In The African Water Systemmentioning

confidence: 99%

Section: Physical and Structural Characteristics Of Microplastics In The African Water Systemmentioning

confidence: 99%

Section: The Occurrence Of Microplastics In African Countries Aquatic Systemsmentioning

confidence: 99%

See 2 more Smart Citations

Microplastic pollution in African countries’ water systems: a review on findings, applied methods, characteristics, impacts, and managements

Aragaw

2021

SN Appl. Sci.

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“…MPs in water have been investigated in Lake Naivasha, Kenya [13] and in sediments in seven tributaries of the Bizerte Lagoon in Tunisia [14]. For Nigeria, one study about MP ingestion of gastropods in the river Osun, Nigeria (a tributary of the Lagos Lagoon), and another about MP ingestion of aquatic insect larvae has recently been published [15]. MPs in fish in the River Nile, Egypt [16], in pelagic and demersal fish [17] and two local fish species [18] in the marine waters of Ghana were also investigated.…”

Section: Introductionmentioning

confidence: 99%

<strong>Microplastic Presence in Sediment and Water of a Lagoon Bordering the Urban Agglomeration of Lagos, Southwest Nigeria</strong>

Olarinmoye¹,

Stock²,

Scherf³

et al. 2020

Preprint

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Microplastics are a fast emerging group of contaminants. Their worldwide occurrence in water, sediment, and aquatic fauna raises questions and concerns as to their probable effects on aquatic life and ecology. This study investigates for the first time presence, abundance, and types of microplastics in water and sediment from a lagoon bordering the large urban agglomeration of Lagos in Nigeria, and renders additional information about grain size and sediment composition. Water and sediment samples were collected from four locations in the Lagos lagoon and a tributary. The abundance and distribution of microplastics in four range classes were determined for the sampled locations. Plastic particles were counted using digital microscopy, and identified with FTIR and pyrolysis GC-MS. The abundance of microplastics ranged from 310-2319 microplastic particles/kg in sediment, and 139-303 particles/m3 in water. The large discrepancy in the sediments can be explained by sediment characteristics as more microplastics were detected in the fine-grained sediments of Makoko. Fibres were the predominant shape found in all samples followed by fragments and few films whereas spheres were missing. Fibres were more abundant in water (92.6 %) than in sediments (32.5 %) while more fragments and foils occurred in sediments. The most commonly used polymers polypropylene and polyethylene were also the most detected ones in both matrices. Compared to other studies in Nigeria, our findings especially in the coarser sediments were lower while the fine-grained site revealed similar results.

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Microplastic burden in invasive signal crayfish (Pacifastacus leniusculus) increases along a stream urbanization gradient

Dent

Chadwick

Eagle

et al. 2023

Ecology and Evolution

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Microplastics are a globally pervasive pollutant with the potential to directly impact species and accumulate in ecosystems. However, there remains a relative paucity of research addressing their accumulation in freshwater ecosystems and a near absence of work in crayfish, despite their high ecological and economic importance. This study investigated the presence of microplastics in the invasive signal crayfish Pacifastacus leniusculus along a stream urbanization gradient. The results demonstrate a ubiquitous presence of microplastics in crayfish digestive tracts at all sites and provide the first evidence of microplastic accumulation in tail tissue. Evidence of a positive linear trend was demonstrated between microplastic concentration in crayfish and upstream urban area size in generalized linear models. Evidence for a positive effect of the upstream urban area and a negative effect of crayfish length on microplastic concentrations in crayfish was demonstrated in multiple generalized linear regression models. Our results extend the current understanding of microplastics presence in freshwater ecosystems and demonstrate their presence in crayfish in the wild for the first time.

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Freshwater insects of different feeding guilds ingest microplastics in two Gulf of Guinea tributaries in Nigeria

Cited by 80 publications

References 28 publications

Microplastic pollution in African countries’ water systems: a review on findings, applied methods, characteristics, impacts, and managements

Microplastic pollution in African countries’ water systems: a review on findings, applied methods, characteristics, impacts, and managements

<strong>Microplastic Presence in Sediment and Water of a Lagoon Bordering the Urban Agglomeration of Lagos, Southwest Nigeria</strong>

Microplastic burden in invasive signal crayfish (Pacifastacus leniusculus) increases along a stream urbanization gradient

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