Polluted paradise: Occurrence of pesticide residues within the urban coastal zones of Santa Cruz and Isabela (Galapagos, Ecuador)

Riascos-Flores, Lenin; Bruneel, Stijn; heyden, Christine Van der; Deknock, Arne; Echelpoel, Wout Van; Forio, Marie Anne Eurie; Saeyer, Nancy De; Berghe, Wim Vanden; Spanoghe, Pieter; Bermudez, Rafael; Domínguez-Granda, Luis; Goethals, Peter

doi:10.1016/j.scitotenv.2020.142956

Cited by 24 publications

(18 citation statements)

References 55 publications

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“…Herbicides in the environment represent a potential hazard to living organisms due to their lipophilic properties, which allow bioaccumulation in biota, and their resistance to degradation (Aparecida et al, 2013;Jurado et al, 2011;Wyss et al, 2006;Ying and Williams, 2000;Yu et al, 2016). The majority of herbicide monitoring studies have focused on freshwater, such as lakes, rivers and reservoirs, with a particular focus on organochlorine compounds (Ccanccapa et al, 2016b(Ccanccapa et al, , 2016aHorak et al, 2021;Masiá et al, 2013;Miller et al, 2019;Palma et al, 2014;Papadakis et al, 2015;Tadeo et al, 2008), with a few exceptions see for example (Riascos-Flores et al, 2020;Yang et al, 2019). A large portion of the herbicide residues reach the ocean through agricultural runoff, atmospheric transportation, and sewage discharge (Campo et al, 2013;Knopp et al, 2016;Münze et al, 2017;Pandit et al, 2006;Stamatis et al, 2010).…”

Section: Herbicides In the Environmentmentioning

confidence: 99%

Herbicides in Camps Bay (Cape Town, South Africa), supplemented

Ojemaye

Onwordi

Pampanin

et al. 2021

Science of The Total Environment

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In 2017 sewage released into Camps Bay, Cape Town was nine fold more than rainfall.• Five herbicides were found in seawater, sediments and marine biota from Camps Bay. • The chemical load in sewage was not removed by a 3 mm screen pretreatment step. • The chemical signature found in marine biota was linked to herbicides in sewage. • Dilution of sewage by seawater did not prevent bioaccumulation of herbicides.

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Section: Herbicides In the Environmentmentioning

confidence: 99%

Herbicides in Camps Bay (Cape Town, South Africa), supplemented

Ojemaye

Onwordi

Pampanin

et al. 2021

Science of The Total Environment

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“…Note that pesticide application rates were not available for the province of Galapagos. This region warrants exposure assessments due to its great environmental value worldwide and previous reports of pesticide residues from local crops, including banned pesticides (Riascos‐Flores et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Mapping Potential Population‐Level Pesticide Exposures in Ecuador Using a Modular and Scalable Geospatial Strategy

et al. 2023

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Human populations and ecosystems are extensively exposed to pesticides. Most nations lack the capacity to control pesticide contamination and have limited availability of pesticide use information. Ecuador is a country with intense pesticide use with high exposure risks to humans and the environment, although relative or combined risks are not well understood. Here, we analyzed the distribution of application rates in Ecuador and identified regions of concern because of high potential exposure. We used a geospatial analysis to identify grid cells (∼8 km × 8 km) where the highest pesticide application rates and density of human populations overlap. Furthermore, we identified other regions of concern based on the number of amphibian species as an indicator of ecosystem integrity and the location of natural protected areas. We found that 28% of Ecuador's population dwelled in areas with high pesticide application rate. We identified an area of ∼512 km2 in the Amazon region where high application rates, large human settlements, and a high number of amphibian species overlapped. Additionally, we distinguished clusters of pesticide application rates and human populations that intersected with natural protected areas. Ecuador exemplifies how pesticides are disproportionately applied in areas with the potential to affect human health and ecosystems' integrity. Global estimates of population dwelling, pesticide application rates, and environmental factors are key in prioritizing locations to conduct further exposure assessments. The modular and scalable nature of the geospatial tools we developed can be expanded and adapted to other regions of the world where data on pesticide use are limited.

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“…In the Galápagos Islands, one of the last frontiers for conducting ecotoxicology research (UNESCO World Heritage region), the concentration of DUR (1.61 μg/L) between the two islands was the highest in samples from coastal waters in urban areas. Riascos-Flores et al (2020) showed that this concentration (1.61 μg/L) poses a high risk for three groups of organisms: algae, invertebrates, and fishes.…”

Section: Environmental Occurrence and Toxicitymentioning

confidence: 99%

Emerging Strategies for the Bioremediation of the Phenylurea Herbicide Diuron

Zhang

Lin

et al. 2021

Front. Microbiol.

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Diuron (DUR) is a phenylurea herbicide widely used for the effective control of most annual and perennial weeds in farming areas. The extensive use of DUR has led to its widespread presence in soil, sediment, and aquatic environments, which poses a threat to non-target crops, animals, humans, and ecosystems. Therefore, the removal of DUR from contaminated environments has been a hot topic for researchers in recent decades. Bioremediation seldom leaves harmful intermediate metabolites and is emerging as the most effective and eco-friendly strategy for removing DUR from the environment. Microorganisms, such as bacteria, fungi, and actinomycetes, can use DUR as their sole source of carbon. Some of them have been isolated, including organisms from the bacterial genera Arthrobacter, Bacillus, Vagococcus, Burkholderia, Micrococcus, Stenotrophomonas, and Pseudomonas and fungal genera Aspergillus, Pycnoporus, Pluteus, Trametes, Neurospora, Cunninghamella, and Mortierella. A number of studies have investigated the toxicity and fate of DUR, its degradation pathways and metabolites, and DUR-degrading hydrolases and related genes. However, few reviews have focused on the microbial degradation and biochemical mechanisms of DUR. The common microbial degradation pathway for DUR is via transformation to 3,4-dichloroaniline, which is then metabolized through two different metabolic pathways: dehalogenation and hydroxylation, the products of which are further degraded via cooperative metabolism. Microbial degradation hydrolases, including PuhA, PuhB, LibA, HylA, Phh, Mhh, and LahB, provide new knowledge about the underlying pathways governing DUR metabolism. The present review summarizes the state-of-the-art knowledge regarding (1) the environmental occurrence and toxicity of DUR, (2) newly isolated and identified DUR-degrading microbes and their enzymes/genes, and (3) the bioremediation of DUR in soil and water environments. This review further updates the recent knowledge on bioremediation strategies with a focus on the metabolic pathways and molecular mechanisms involved in the bioremediation of DUR.

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Polluted paradise: Occurrence of pesticide residues within the urban coastal zones of Santa Cruz and Isabela (Galapagos, Ecuador)

Cited by 24 publications

References 55 publications

Herbicides in Camps Bay (Cape Town, South Africa), supplemented

Herbicides in Camps Bay (Cape Town, South Africa), supplemented

Mapping Potential Population‐Level Pesticide Exposures in Ecuador Using a Modular and Scalable Geospatial Strategy

Emerging Strategies for the Bioremediation of the Phenylurea Herbicide Diuron

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