Monitoring of carbaryl and cypermethrin concentrations in water and soil in Southern Malawi

Kanyika-Mbewe, Charity; Thole, Bernard; Makwinja, Rodgers; Kaonga, Chikumbusko Chiziwa

doi:10.1007/s10661-020-08557-y

Cited by 44 publications

(20 citation statements)

References 37 publications

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“…Several researchers, such as Keesstra et al (2016), have evidenced these trade-offs, who concluded that the rate of species extinction, turbidity, soil erosion, and flooding increased with increasing cultivated land. Kay et al (2009), Kanyika-Mbewe et al (2020), andNkwanda et al (2021) also reported similar trade-offs.…”

Section: Trade-offs Between Ecosystem Servicesmentioning

confidence: 58%

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Land use/land cover dynamics, trade-offs and implications on tropical inland shallow lakes’ ecosystems’ management: Case of Lake Malombe, Malawi

Makwinja

Mengistou²,

Kaunda

et al. 2021

Sustainable Environment

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Lake Malombe supports various ecosystem services (ESs). However, it is increasingly experiencing human-induced pressure. This study used geospatial, household surveys, focus group discussion, key informant interviews, consultative meetings, and field observation on assessing the Land use/ Land cover dynamics (LULCD), its trade-offs, and implications on ESs. The findings demonstrated a decrease in forest land (52,932 ha to 78,983 ha) at the expense of cultivated (52,932 ha to 78,983 ha) and settlements (7054 ha to 17,595 ha). Changes in ecological indicators such as fishery, river flow, soil erosion, turbidity, biodiversity, invasion of alien species, scenic beauty, extinction of some species, frequent flooding, cultural value, and carbon sequestration were significantly (p-<0.05) linked to some LULCD classes. The study findings are significant to policymakers, ecosystem managers, the local population, and various stakeholders in understanding conflicting interests and policy priorities to balance the lake ecological restoration and human welfare.

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Section: Trade-offs Between Ecosystem Servicesmentioning

confidence: 58%

“…, Nakawuka et al (2018),Zebire et al (2019), BaHonfoga (2018,Kanyika-Mbewe et al (2020), andMensah et al (2020), andAneseyee et al, 2020) in East, South and West Africa, andMakwinja, et al, (2021b) in Malawi.…”

mentioning

confidence: 99%

Land use/land cover dynamics, trade-offs and implications on tropical inland shallow lakes’ ecosystems’ management: Case of Lake Malombe, Malawi

Makwinja

Mengistou²,

Kaunda

et al. 2021

Sustainable Environment

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“…Environmental samples were mostly clustered around larger aquatic ecosystems [ 78 , 79 , 80 , 81 , 82 ] and were integrating measurements from water, sediment, or aquatic organisms. Further using passive air [ 30 , 47 , 71 , 83 ] and water [ 21 , 84 , 85 ] sampling systems, several pesticides in the chemical groups of the OCPs and OP, carbamates, and triazine could be detected over several years in different regions across SSA. Indeed, such samplings could define exposure windows over time and space to multiple pesticides and lay a basis for risk assessments.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, such samplings could define exposure windows over time and space to multiple pesticides and lay a basis for risk assessments. However, among the studies that collected environmental samples, only a few assessed environmental [ 21 , 86 , 87 ] or human health risks [ 22 , 85 , 88 , 89 , 90 ]. Indeed, in serval cases, there are no contextual environmental risk thresholds available.…”

Section: Discussionmentioning

confidence: 99%

Pesticide Research on Environmental and Human Exposure and Risks in Sub-Saharan Africa: A Systematic Literature Review

Fuhrimann

Wan

Blouzard

et al. 2021

IJERPH

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On the African continent, ongoing agriculture intensification is accompanied by the increasing use of pesticides, associated with environmental and public health concerns. Using a systematic literature review, we aimed to map current geographical research hotspots and gaps around environmental and public health risks research of agriculture pesticides in Sub-Saharan Africa (SSA). Studies were included that collected primary data on past and current-used agricultural pesticides and assessed their environmental occurrence, related knowledge, attitude and practice, human exposure, and environmental or public health risks between 2006 and 2021. We identified 391 articles covering 469 study sites in 37 countries in SSA. Five geographical research hotspots were identified: two in South Africa, two in East Africa, and one in West Africa. Despite its ban for agricultural use, organochlorine was the most studied pesticide group (60%; 86% of studies included DDT). Current-used pesticides in agriculture were studied in 54% of the study sites (including insecticides (92%), herbicides (44%), and fungicides (35%)). Environmental samples were collected in 67% of the studies (e.g., water, aquatic species, sediment, agricultural produce, and air). In 38% of the studies, human subjects were investigated. Only few studies had a longitudinal design or assessed pesticide’s environmental risks; human biomarkers; dose-response in human subjects, including children and women; and interventions to reduce pesticide exposure. We established a research database that can help stakeholders to address research gaps, foster research collaboration between environmental and health dimensions, and work towards sustainable and safe agriculture systems in SSA.

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“…In Malawi, rapid population growth, infrastructure developments (increased inflow from human settlements and industries), agricultural activities (unsustainable farming systems and heavy use of fertilizers in the upland catchments of the lakes), and climate change have been linked to freshwater ecosystems degradation ( Njaya et al., 2011 ; Jamu et al., 2011 ; FISH 2015 ; Kanyika-Mbewe et al., 2020 ; Makwinja et al., 2021b ). Malawi has lost about 30,000–40,000 ha of forest land to agriculture and charcoal production, making it the highest in the Southern African Development Community (SADC) ( Ngwira and Watanabe 2019 ; Nkwanda et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Willingness to pay for the ecological restoration of an inland freshwater shallow lake: case of Lake Malombe, Malawi

Makwinja

Mengistou

Kaunda

et al. 2022

Heliyon

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Lake Malombe is ranked among the most vulnerable inland freshwater shallow lakes in Malawi. The lake has lost over US$79.83 million ecosystem service values from 1999 to 2019 due to rapid population growth, increased poverty, landscape transformation, and over exploitation-hampering the effort to achieve United Nations (UN) Sustainable Development Goals (SDGs), in particular, life underwater (SDG 14), life on land (SDG 15), climate action (SDG 13), and no poverty (SDG 1) and Aichi Biodiversity Targets. In line with the 2021-2030 United Nations' Declaration on massive upscaling of the ecosystems restoration effort, this study applied the contingent valuation method (CVM) and binary logistic regression model to determine the public's willingness to pay (WTP) for ecosystem restoration and the influencing factors. The aim was to integrate science into policy framework to achieve a sustainable flow of ecosystem services (ESs). Qualitative data were collected by employing focus group discussion, key informant interviews, and field observation. Quantitative data were collected using structured questionnaires covering 420 households. The results revealed that 56% of the respondents were willing to pay an average of US$28.42/household/year. These respondents believed that the initiative would improve lake ESs, fish biodiversity, income level, water quality and mitigate climate change impact. Age, gender, literacy, income, social trust, institutional trust, access to extension services, period stay in the area, household distance from the lake, lake ecological dynamics impact, having the hope of reviving the lake health ecological status, perception of having lake ecological restoration program, participation in lake restoration program, access to food from the

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Monitoring of carbaryl and cypermethrin concentrations in water and soil in Southern Malawi

Cited by 44 publications

References 37 publications

Land use/land cover dynamics, trade-offs and implications on tropical inland shallow lakes’ ecosystems’ management: Case of Lake Malombe, Malawi

Land use/land cover dynamics, trade-offs and implications on tropical inland shallow lakes’ ecosystems’ management: Case of Lake Malombe, Malawi

Pesticide Research on Environmental and Human Exposure and Risks in Sub-Saharan Africa: A Systematic Literature Review

Willingness to pay for the ecological restoration of an inland freshwater shallow lake: case of Lake Malombe, Malawi

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