Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River
Freshwater ecosystems are vulnerable to various land use impacts, resulting in concern for aquatic biota and humans. Understanding the occurrence of pesticide contamination is necessary to safeguard aquatic biodiversity and human health. We hypothesize that sub-catchments with a higher proportion of...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
|
| Series: | Journal of Freshwater Ecology |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/02705060.2025.2494811 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850142519731421184 |
|---|---|
| author | Eunice O. Ikayaja Nenibarini Zabbey Raphael M. Tshimanga Gilbert Ndatimana Twaha A. Basamba Francis O. Arimoro |
| author_facet | Eunice O. Ikayaja Nenibarini Zabbey Raphael M. Tshimanga Gilbert Ndatimana Twaha A. Basamba Francis O. Arimoro |
| author_sort | Eunice O. Ikayaja |
| collection | DOAJ |
| description | Freshwater ecosystems are vulnerable to various land use impacts, resulting in concern for aquatic biota and humans. Understanding the occurrence of pesticide contamination is necessary to safeguard aquatic biodiversity and human health. We hypothesize that sub-catchments with a higher proportion of agricultural activities have a higher concentration of pesticides in the water sample. Our study assessed the nexus between land uses and pesticide contamination in three zones of the Chanchaga River, namely, a control site, an agricultural area (S1), and an urban area (S2). Various classes of land use around the catchment were determined using ArcGIS 10.8 GIS software. At the same time, analysis of pesticide residues was carried out using the liquid–liquid extraction method, followed by gas chromatography–mass spectrometry. A total of 10 herbicides and 12 insecticides were recorded in each sampled sub-catchments, with a statistically significant difference across the sampled sub-catchments. Sampled sites in agricultural and urban areas had higher concentrations of pesticide residues than the control zone, with less anthropogenic influence. Redundancy analysis revealed farming and urbanized land use were the main sources of pesticide contamination in the waterbody. Pesticides may have chronic or acute impacts on aquatic biodiversity and a higher trophic effect on human health. It was evident that all sampled sub-catchments had pesticide concentrations exceeding the WHO permissible limit for human consumption. Prioritizing alternative methods to pesticides for managing pests and weeds is crucial for sustainable agriculture and environmental sustainability. |
| format | Article |
| id | doaj-art-1f844371bf93479d8b15061ee3ddeae3 |
| institution | OA Journals |
| issn | 0270-5060 2156-6941 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Freshwater Ecology |
| spelling | doaj-art-1f844371bf93479d8b15061ee3ddeae32025-08-20T02:29:03ZengTaylor & Francis GroupJournal of Freshwater Ecology0270-50602156-69412025-12-0140110.1080/02705060.2025.2494811Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga RiverEunice O. Ikayaja0Nenibarini Zabbey1Raphael M. Tshimanga2Gilbert Ndatimana3Twaha A. Basamba4Francis O. Arimoro5Ecology and Environmental Biology Unit, Animal Biology Department, Federal University of Technology, Minna, NigeriaHydrocarbon Pollution Remediation Project (HYPREP), Port Harcourt, NigeriaRegional School of Water and Congo Basin Water Resources Research Center (CRREBaC), University of Kinshasa, Kinshasa, CongoCenter of Excellence in Biodiversity and Natural Resources Management (CoEB), University of Rwanda, Kigali, RwandaCollege of Agricultural and Environmental Science, Makerere University, Kampala, UgandaEcology and Environmental Biology Unit, Animal Biology Department, Federal University of Technology, Minna, NigeriaFreshwater ecosystems are vulnerable to various land use impacts, resulting in concern for aquatic biota and humans. Understanding the occurrence of pesticide contamination is necessary to safeguard aquatic biodiversity and human health. We hypothesize that sub-catchments with a higher proportion of agricultural activities have a higher concentration of pesticides in the water sample. Our study assessed the nexus between land uses and pesticide contamination in three zones of the Chanchaga River, namely, a control site, an agricultural area (S1), and an urban area (S2). Various classes of land use around the catchment were determined using ArcGIS 10.8 GIS software. At the same time, analysis of pesticide residues was carried out using the liquid–liquid extraction method, followed by gas chromatography–mass spectrometry. A total of 10 herbicides and 12 insecticides were recorded in each sampled sub-catchments, with a statistically significant difference across the sampled sub-catchments. Sampled sites in agricultural and urban areas had higher concentrations of pesticide residues than the control zone, with less anthropogenic influence. Redundancy analysis revealed farming and urbanized land use were the main sources of pesticide contamination in the waterbody. Pesticides may have chronic or acute impacts on aquatic biodiversity and a higher trophic effect on human health. It was evident that all sampled sub-catchments had pesticide concentrations exceeding the WHO permissible limit for human consumption. Prioritizing alternative methods to pesticides for managing pests and weeds is crucial for sustainable agriculture and environmental sustainability.https://www.tandfonline.com/doi/10.1080/02705060.2025.2494811Afrotropical riveraquatic healthecotoxicologypesticidesNigeriaLand use |
| spellingShingle | Eunice O. Ikayaja Nenibarini Zabbey Raphael M. Tshimanga Gilbert Ndatimana Twaha A. Basamba Francis O. Arimoro Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River Journal of Freshwater Ecology Afrotropical river aquatic health ecotoxicology pesticides Nigeria Land use |
| title | Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River |
| title_full | Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River |
| title_fullStr | Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River |
| title_full_unstemmed | Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River |
| title_short | Tropical watershed management: understanding the relationship between land use and pesticide pollution in Chanchaga River |
| title_sort | tropical watershed management understanding the relationship between land use and pesticide pollution in chanchaga river |
| topic | Afrotropical river aquatic health ecotoxicology pesticides Nigeria Land use |
| url | https://www.tandfonline.com/doi/10.1080/02705060.2025.2494811 |
| work_keys_str_mv | AT euniceoikayaja tropicalwatershedmanagementunderstandingtherelationshipbetweenlanduseandpesticidepollutioninchanchagariver AT nenibarinizabbey tropicalwatershedmanagementunderstandingtherelationshipbetweenlanduseandpesticidepollutioninchanchagariver AT raphaelmtshimanga tropicalwatershedmanagementunderstandingtherelationshipbetweenlanduseandpesticidepollutioninchanchagariver AT gilbertndatimana tropicalwatershedmanagementunderstandingtherelationshipbetweenlanduseandpesticidepollutioninchanchagariver AT twahaabasamba tropicalwatershedmanagementunderstandingtherelationshipbetweenlanduseandpesticidepollutioninchanchagariver AT francisoarimoro tropicalwatershedmanagementunderstandingtherelationshipbetweenlanduseandpesticidepollutioninchanchagariver |