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Vivas F, Balladares S, Lobos MG, Gaete H. Assessment Toxicity of Soils from Areas with Mining Activity Through the Stability of the Lysosomal Membrane and Avoidance Behavior in the Earthworm Eisenia fetida. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 110:13. [PMID: 36512136 DOI: 10.1007/s00128-022-03662-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/31/2022] [Indexed: 06/17/2023]
Abstract
The aim of this study was to determine the effect of soils from areas with mining activity on the stability of the lysosomal membrane and avoidance behavior in the worm Eisenia fetida. Texture, organic material, conductivity and pH were determined in soils. The total concentrations of Cu, Zn, Pb, Ni, As and Hg were determined in tissues of E. fetida and in soils. Neutral red retention time (NRRT) was determined in hemocytes, and behavior with the avoidance test, in the earthworm. Cu (1563 ± 58 mg kg-1) and Zn (135 ± 9 mg kg-1) had the highest mean concentrations in the soils, while Hg (0.01 ± 0.001 mg kg-1) had the lowest concentration in all the soils. The soil with the highest Cu concentration produced an avoidance of > 80%. Most of the soils produced a significant loss of the stability of the lysosomal membrane. The variables organic material and sand would facilitate habitat selection in E. fetida, In conclusion, the soils have chemical agents in bioavailable concentrations that provoke adverse cellular effects and evasion behavior. We propose the use of both response variables as early alerts in the evaluation of soils.
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Affiliation(s)
- Francisca Vivas
- Escuela de Ingeniería en Medioambiente, Facultad de Ingeniería, Universidad de Valparaíso, Av. Brasil, 2041, Valparaíso, Chile
| | - Sebastián Balladares
- Escuela de Ingeniería en Medioambiente, Facultad de Ingeniería, Universidad de Valparaíso, Av. Brasil, 2041, Valparaíso, Chile
| | - María Gabriela Lobos
- Instituto de Química y Bioquímica, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile
| | - Hernán Gaete
- Escuela de Ingeniería en Medioambiente, Facultad de Ingeniería, Universidad de Valparaíso, Av. Brasil, 2041, Valparaíso, Chile.
- Centro de Investigación y Gestión de Recursos Naturales CIGREN, Universidad de Valparaíso. Gran, Bretaña 1111, Playa Ancha, Valparaíso, Chile.
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2
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Castro GB, Pinheiro FR, Felipe MC, Bernegossi AC, Girolli D, Gorni GR, Corbi JJ. Update on the use of Pristina longiseta Ehrenberg, 1828 (Oligochaeta: Naididae) as a toxicity test organism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:38360-38369. [PMID: 32748353 DOI: 10.1007/s11356-020-10295-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 07/27/2020] [Indexed: 06/11/2023]
Abstract
Ecotoxicological bioassays have been widely applied to evaluate the toxicity of substances in standardized test organisms. Nevertheless, the main challenge for researchers is the use of native species to express the effects of pollutants on aquatic biota. Thirty years ago, Smith and collaborators evaluate the possible use of Pristina longiseta (as Pristina leidyi) in acute toxicity test, developing some experiments using cadmium and vanadium as toxicants. The present work aimed to update the use of P. longiseta, in acute bioassays, presenting the occurrence and general characteristics of the species; adaptation of cultivation to tropical conditions; sensitivity tests using potassium chloride (KCl) and copper sulfate (CuSO4) as reference substances standardized by OECD, USEPA, and ABNT; and acute exposure to zinc chloride (ZnCl2). The results showed a successful use of this species as tropical test organism, which presented easy laboratory rearing and responded to the classical ecotoxicological index. The present study can increase the utilization of P. longiseta in bioassays for tropical regions and improve the evaluation of environmental impacts using a native species in ecotoxicological studies.
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Affiliation(s)
- Gleyson B Castro
- Aquatic Ecology Laboratory, Department of Hydraulic and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil.
| | - Fernanda R Pinheiro
- Aquatic Ecology Laboratory, Department of Hydraulic and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Mayara C Felipe
- Aquatic Ecology Laboratory, Department of Hydraulic and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Aline C Bernegossi
- Aquatic Ecology Laboratory, Department of Hydraulic and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
| | - Douglas Girolli
- Environmental Studies Center, University of Araraquara, Araraquara, SP, Brazil
| | - Guilherme R Gorni
- Environmental Studies Center, University of Araraquara, Araraquara, SP, Brazil
| | - Juliano J Corbi
- Aquatic Ecology Laboratory, Department of Hydraulic and Sanitation, São Carlos School of Engineering, University of São Paulo, São Carlos, SP, Brazil
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Jegede OO, Awuah KF, Renaud MJ, Cousins M, Hale BA, Siciliano SD. Single metal and metal mixture toxicity of five metals to Oppia nitens in five different Canadian soils. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122341. [PMID: 32092659 DOI: 10.1016/j.jhazmat.2020.122341] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/18/2019] [Accepted: 02/15/2020] [Indexed: 05/24/2023]
Abstract
Metal mixture toxicity across soil types is a daunting challenge to risk assessment. Here, we evaluated metal mixture toxicity in Oppia nitens, using ten fixed metal mixture ratios in five Canadian soils that closely matched some of the EU PNEC reference soils. Soils were dosed with five metals (Cu, Zn, Pb, Co, Ni) as single metals (ten concentrations) and as mixtures (eight concentrations). Synchronized adult mites were exposed to metals, with survival and reproduction assessed after 28 days. We found out that (i) the differences among soils in mite sensitivity and single metals were not consistent when mites were exposed to metal mixtures, (ii) assuming concentration addition, the mixture interaction factor (MIF) showed that single metal low effect levels excessively underestimated low level metal mixture effects (iii) Zn emerged as a protective metal in most mixtures, and (iv) Soil properties such as CEC, independent of effects on metal speciation, explained more of the variation than measured metals. This study suggests that metal risk assessment should be done on a case by case basis. Further work is needed to ensure that by protecting soil-dwelling organisms from single metals, the risk from metal mixtures is appropriately protected for.
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Affiliation(s)
- Olukayode O Jegede
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, S7N 5B3, Canada.
| | - Kobby F Awuah
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, S7N 5B3, Canada
| | - Mathieu J Renaud
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada 8 Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Mark Cousins
- Department of Soil Science, University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada
| | - Beverley A Hale
- Department of Land Resource Science, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Steven D Siciliano
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK, S7N 5B3, Canada; Department of Soil Science, University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada
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Eijsackers H, Reinecke A, Reinecke S, Maboeta M. Heavy Metal Threats to Plants and Soil Life in Southern Africa: Present Knowledge and Consequences for Ecological Risk Assessment. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 249:29-70. [PMID: 30806801 DOI: 10.1007/398_2019_23] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In recent times there has been remarkable development in the field of soil ecotoxicology and risk assessment (RA) models. It is, however, debatable if these RA models are robust representatives for worldwide relevance. In order to investigate this, the current overview aims to address heavy metal threats to soil life in southern Africa by investigating present knowledge and consequences for RA using research in southern Africa as a case. To this end, the focus is on southern African soils, soil life and living conditions. To critically discuss these issues, we report on extensive research conducted in the southern African context and looked how comparable these findings are to RA models employed in the western world. This is done by providing an inventory of selected studies focused on the ecotoxicity of metals towards soil life. It is concluded that there is a dearth of information on southern African soil life, most of which are laboratory-based studies carried out by a handful of researchers. Future research incorporating the available information into a soil ecosystem assessment procedure is paramount. It is recommended that a starting point to tackle this might be the development of holistic sight-specific guidelines for ecological risk assessment at larger spatial scales (km2) which takes into cognizance landscapes, vegetation and faunal characteristics.
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Affiliation(s)
- Herman Eijsackers
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
- Wageningen University & Research, Wageningen, The Netherlands
| | - Adriaan Reinecke
- Department of Botany and Zoology, Stellenbosch University, Matieland, South Africa
| | - Sophié Reinecke
- Department of Botany and Zoology, Stellenbosch University, Matieland, South Africa
| | - Mark Maboeta
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa.
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Hrda K, Pouzar M, Knotek P. Study of zinc oxide nanoparticles and zinc chloride toxicity to annelid Enchytraeus crypticus in modified agar-based media. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:22702-22709. [PMID: 29851017 DOI: 10.1007/s11356-018-2356-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/22/2018] [Indexed: 06/08/2023]
Abstract
Acute toxicity of zinc oxide nanoparticle (ZnO-NP, mean particle size diameter of 10 nm) powder and water-soluble salt of zinc (ZnCl2) to annelid Enchytraeus crypticus was tested using an agar-based nutrient-enriched medium with the addition of kaolin and humic acids (HA). Adults of the E. crypticus were cultivated in pure agar and in three types of modified exposure media containing different proportions of model soil constituents. Potworms were exposed to zinc in both forms (1-1000 mg kg-1 of agar) for 96 h. In experiments with ZnCl2, toxicity of zinc was the highest in pure agar followed by agar with HA and agar with kaolin and HA and the lowest toxicity was observed in agar with kaolin. The corresponding LC50 values were 13.2, 28.8, 39.4, and 75.4 mg kg-1 respectively. In contrast, zinc in the form of ZnO-NPs was most toxic in the presence of HA followed by pure agar, agar with kaolin, and kaolin with HA. In this case, LC50 values were 15.8, 43.5, 111, and 122 mg kg-1 respectively. Scanning electron microscopy revealed that the smallest agglomerates occurred in the presence of kaolin, where ZnO-NPs were sealed in a kaolin shell. This effect reduced the bioavailability and toxicity of the NPs. In contrast, larger agglomerates were observed in the presence of HA but a larger amount of zinc was dispersed in the volume of agar.
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Affiliation(s)
- Katerina Hrda
- Faculty of Chemical Technology, Institute of Environmental and Chemical Engineering, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Miloslav Pouzar
- Faculty of Chemical Technology, Institute of Environmental and Chemical Engineering, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic.
- Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, Square of Czechoslovak legions 565, 530 02, Pardubice, Czech Republic.
| | - Petr Knotek
- Faculty of Chemical Technology, Department of General and Inorganic Chemistry, University of Pardubice, Studentska 573, 530 02, Pardubice, Czech Republic
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Ponsankar A, Vasantha-Srinivasan P, Senthil-Nathan S, Thanigaivel A, Edwin ES, Selin-Rani S, Kalaivani K, Hunter WB, Alessandro RT, Abdel-Megeed A, Paik CH, Duraipandiyan V, Al-Dhabi NA. Target and non-target toxicity of botanical insecticide derived from Couroupita guianensis L. flower against generalist herbivore, Spodoptera litura Fab. and an earthworm, Eisenia foetida Savigny. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 133:260-270. [PMID: 27476000 DOI: 10.1016/j.ecoenv.2016.06.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/17/2016] [Accepted: 06/24/2016] [Indexed: 06/06/2023]
Abstract
Botanical insecticides may provide alternatives to synthetic insecticides for controlling Spodoptera litura (F.) and they are target specific, biodegradable, and harmless to mammals. Eight natural chemical compounds with larvicidal activity were identified from fraction F6 of C. guianensis flower extract. Probit analysis of 95% confidence level exposed an LC50 of 223ppm against S. litura third instar larvae. The growth and development of S. litura was affected in sub-lethal concentrations of fraction F6 (50, 100, 150 and 200ppm) compared to controls. Similarly nutritional indices values decreased significantly compared to controls. Fraction F6 also damaged the gut epithelial layer and brush border membrane (BBM). This study also resolved the effects of toxicity to non-target earthworm treated with fraction F6 and chemical pesticides (monotrophos and cypermethrin) and the results showed that fraction F6 had no harmful effect on E. fetida. Further, fraction F6 was eluted and sub fractions F6c (50ppm) showed high mortality against S. litura third instar larvae. Octacosane from fraction F6c was established and confirmed using IR spectrum and HPLC. The time of retention of fraction F6c was confirmed with the octacosane standard. Fraction F6 of C. guianensis extract caused dose-dependent mortality towards S. litura. Octacosane in fraction F6c was establish to be the prominent chemical compound associated with causing mortality but other compounds present in the fraction F6 were shown to be associated with changes in development of S. litura at low dosages. S. litura at low dosage. Therefore, these findings suggest that octacosane may be one of the major insecticidal compounds affecting S. litura survival.
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Affiliation(s)
- Athirstam Ponsankar
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India
| | - Prabhakaran Vasantha-Srinivasan
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India
| | - Sengottayan Senthil-Nathan
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India.
| | - Annamalai Thanigaivel
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India
| | - Edward-Sam Edwin
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India
| | - Selvaraj Selin-Rani
- Division of Biopesticides and Environmental Toxicology, Sri Paramakalyani Centre for Excellence in Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, 627412 Tirunelveli, Tamil Nadu, India
| | - Kandaswamy Kalaivani
- Post Graduate and Research Department of Zoology, Sri Parasakthi College for Women, Courtrallam, 627802 Tirunelveli, Tamil Nadu, India
| | - Wayne B Hunter
- United States Department of Agriculture, U.S. Horticultural Research Laboratory, 2001 South Rock Road, Fort Pierce, FL 34945, USA
| | - Rocco T Alessandro
- Treasure Coast Chemistry Consultants, LLC 107 Lakes End Drive, Apt. B Ft. Pierce, FL 34982, USA
| | - Ahmed Abdel-Megeed
- Department of Plant Protection, Faculty of Agriculture, Saba Basha, Alexandria University, P.O. Box 21531, Alexandria 21526, Egypt
| | - Chae-Hoon Paik
- Planning and Coordination Division, National Institute of Crop Science, 181, Hyeoksin-ro, Iseo-myeon, Wanju-gun, Jeollabuk-do 565-851, Republic of Korea
| | - Veeramuthu Duraipandiyan
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
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Bustos V, Mondaca P, Verdejo J, Sauvé S, Gaete H, Celis-Diez JL, Neaman A. Thresholds of arsenic toxicity to Eisenia fetida in field-collected agricultural soils exposed to copper mining activities in Chile. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 122:448-454. [PMID: 26398238 DOI: 10.1016/j.ecoenv.2015.09.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 09/02/2015] [Accepted: 09/03/2015] [Indexed: 06/05/2023]
Abstract
Several previous studies highlighted the importance of using field-collected soils-and not artificially-contaminated soils-for ecotoxicity tests. However, the use of field-collected soils presents several difficulties for interpretation of results, due to the presence of various contaminants and unavoidable differences in the physicochemical properties of the tested soils. The objective of this study was to estimate thresholds of metal toxicity in topsoils of 24 agricultural areas historically contaminated by mining activities in Chile. We performed standardized earthworm reproduction tests (OECD 222 and ISO 11268-2) with Eisenia fetida. Total soil concentrations of Cu, As, Zn, and Pb were in the ranges of 82-1295 mg kg(-1), 7-41 mg kg(-1), 86-345 mg kg(-1), and 25-97 mg kg(-1), respectively. In order to differentiate between the effects of different metals, we used regression analysis between soil metal concentrations and earthworm responses, as well as between metal concentrations in earthworm tissues and earthworm responses. Based on regression analysis, we concluded that As was a metal of prime concern for Eisenia fetida in soils affected by Cu mining activities, while Cu exhibited a secondary effect. In contrast, the effects of Zn and Pb were not significant. Soil electrical conductivity was another significant contributor to reproduction toxicity in the studied soils, forcing its integration in the interpretation of the results. By using soils with electrical conductivity ≤ 0.29 dS m(-1) (which corresponds to EC50 of salt toxicity to Eisenia fetida), it was possible to isolate the effect of soil salinity on earthworm reproduction. Despite the confounding effects of Cu, it was possible to determine EC10, EC25 and EC50 values for total soil As at 8 mg kg(-1), 14 mg kg(-1) and 22 mg kg(-1), respectively, for the response of the cocoon production. However, it was not possible to determine these threshold values for juvenile production. Likewise, we were able to determine EC10, EC25 and EC50 of earthworm tissue As of 38 mg kg(-1), 47 mg kg(-1), and 57 mg kg(-1), respectively, for the response of the cocoon production. Finally, we determined the no-observed effect concentration of tissue As in E. fetida of 24 mg kg(-1). Thus, earthworm reproduction test is applicable for assessment of metal toxicity in field-collected soils with low electrical conductivity, while it might have a limited applicability in soils with high electrical conductivity because the salinity-induced toxicity will hinder the interpretation of the results.
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Affiliation(s)
- Víctor Bustos
- Escuela de Agronomía, Pontificia Universidad Católica de Valparaíso, Casilla 4-D, Quillota, Chile
| | - Pedro Mondaca
- Escuela de Agronomía, Pontificia Universidad Católica de Valparaíso, Casilla 4-D, Quillota, Chile
| | - José Verdejo
- Escuela de Agronomía, Pontificia Universidad Católica de Valparaíso, Casilla 4-D, Quillota, Chile
| | - Sébastien Sauvé
- Department of Chemistry, Université de Montréal, Montréal, QC, Canada H3C 3J7
| | - Hernán Gaete
- Instituto de Ciencias Ambientales, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile
| | - Juan L Celis-Diez
- Escuela de Agronomía, Pontificia Universidad Católica de Valparaíso, Casilla 4-D, Quillota, Chile
| | - Alexander Neaman
- Escuela de Agronomía, Pontificia Universidad Católica de Valparaíso, Casilla 4-D, Quillota, Chile.
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Sivakumar S. Effects of metals on earthworm life cycles: a review. ENVIRONMENTAL MONITORING AND ASSESSMENT 2015; 187:530. [PMID: 26215824 DOI: 10.1007/s10661-015-4742-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 07/14/2015] [Indexed: 05/21/2023]
Abstract
Earthworms are abundant and ecologically very important organisms in the soil ecosystem. Impacts by pollutants on earthworm communities greatly influence the fertility of the terrestrial environment. In ecotoxicology, earthworms are good indicators of metal pollution. The observed median lethal concentrations (LC50) and the effective concentrations that cause 50% reduction of earthworm growth and reproduction (EC50) are referred to as toxicity concentrations or endpoints. In addition, the 'no observed effective concentration' (NOEC) is the estimation of the toxicity of metals on earthworms expressed as the highest concentration tested that does not show effects on growth and reproduction compared to controls. This article reviews the ecotoxicological parameters of LC50, EC50 and NOEC of a set of worms exposed to a number of metals in various tested media. In addition, this article reviews metal accumulation and the influences of soil characteristics on metal accumulation in earthworms. Morphological and behavioural responses are often used in earthworm toxicity studies. Therefore, earthworm responses due to metal toxicity are also discussed in this article.
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Affiliation(s)
- S Sivakumar
- Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 627-706, South Korea,
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Owojori OJ, Siciliano SD. The potentiation of zinc toxicity by soil moisture in a boreal forest ecosystem. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:600-607. [PMID: 25502519 DOI: 10.1002/etc.2846] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2014] [Revised: 12/02/2014] [Accepted: 12/03/2014] [Indexed: 06/04/2023]
Abstract
Northern boreal forests often experience forest dieback as a result of metal ore mining and smelting. The common solution is to lime the soil, which increases pH, reducing metal toxicity and encouraging recovery. In certain situations, however, such as in Flin Flon, Manitoba, Canada, liming has yielded only moderate benefits, with some locations responding well to liming and other locations not at all. In an effort to increase the effectiveness of the ecorestoration strategy, the authors investigated if these differences in liming responsiveness were linked to differences in toxicity. Toxicity of metal-impacted Flin Flon soils on the oribatid mite Oppia nitens and the collembolan Folsomia candida was assessed, with a view toward identifying the metal of concern in the area. The effects of moisture content on metal sorption, uptake, and toxicity to the invertebrates were also investigated. Toxicity tests with the invertebrates were conducted using either Flin Flon soils or artificial soils with moisture content adjusted to 30%, 45%, 60%, or 75% of the maximum water-holding capacity of the soil samples. The Relative to Cd Toxicity Model identified Zn as the metal of concern in the area, and this was confirmed using validation tests with field contaminated soils. Furthermore, increasing the moisture content in soils increased the amount of mobile Zn available for uptake with the ion exchange resin. Survival and reproduction of both invertebrates were reduced under Zn exposure as moisture level increased. Thus, moisture-collecting landforms, which are often also associated with high Zn concentrations at Flin Flon, have, as a result, higher Zn toxicity to the soil ecosystem because of increases in soil moisture.
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Affiliation(s)
- Olugbenga J Owojori
- Department of Soil Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Department of Zoology, Obafemi Awolowo University, Ile-Ife, Nigeria
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Leveque T, Capowiez Y, Schreck E, Mazzia C, Auffan M, Foucault Y, Austruy A, Dumat C. Assessing ecotoxicity and uptake of metals and metalloids in relation to two different earthworm species (Eiseina hortensis and Lumbricus terrestris). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 179:232-241. [PMID: 23688736 DOI: 10.1016/j.envpol.2013.03.066] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/23/2013] [Accepted: 03/28/2013] [Indexed: 06/02/2023]
Abstract
Due to diffuse atmospheric fallouts of process particles enriched by metals and metalloids, polluted soils concern large areas at the global scale. Useful tools to assess ecotoxicity induced by these polluted soils are therefore needed. Earthworms are currently used as biotest, however the influence of specie and earthworm behaviour, soil characteristics are poorly highlighted. Our aim was therefore to assess the toxicity of various polluted soils with process particles enriches by metals and metalloids (Pb, Cd, Cu, Zn, As and Sb) collected from a lead recycling facility on two earthworm species belonging to different ecological types and thus likely to have contrasted behavioural responses (Eiseina hortensis and Lumbricus terrestris). The combination of behavioural factors measurements (cast production and biomass) and physico-chemical parameters such as metal absorption, bioaccumulation by earthworms and their localization in invertebrate tissues provided a valuable indication of pollutant bioavailability and ecotoxicity. Soil characteristics influenced ecotoxicity and metal uptake by earthworms, as well as their soil bioturbation.
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Affiliation(s)
- Thibaut Leveque
- INP-ENSAT, Université de Toulouse, Av. Agrobiopôle, PO Box 107, Auzeville-Tolosane, 31326 Castanet-Tolosan, France
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11
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Ma WC, Bonten LTC. Bioavailability pathways underlying zinc-induced avoidance behavior and reproduction toxicity in Lumbricus rubellus earthworms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2011; 74:1721-1726. [PMID: 21497905 DOI: 10.1016/j.ecoenv.2011.04.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 12/07/2010] [Accepted: 04/03/2011] [Indexed: 05/30/2023]
Abstract
We investigated possible bioavailability pathways underlying zinc-induced avoidance behavior and sublethal reproduction impairment in Lumbricus rubellus. Clay-loam (pH 7.3) and sandy soil (three pH values of 4.3-6.0) were amended with zinc sulfate at six soil concentrations of total Zn ranging from 0.1 to 36 mmol/kg dw. Estimated and measured concentrations of free and exchangeable Zn ranged 10(-4) to 7.1 mmol/l. Avoidance behavior responses were fast and could be directly predicted from the activity of free zinc ions without a modifying pH effect. The repellent effect is thus likely mediated by a direct action of Zn(2+) ions on epidermal chemosensitive receptors. Body zinc uptake, however, was determined by proton competition with free Zn(2+) sorption. Excess accumulation of body Zn was a good predictor of reproduction decline, which is indicative of internal zinc poisoning. The results indicated that zinc affects earthworms via both direct and indirect mechanisms of external and internal exposure.
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Affiliation(s)
- Wei-Chun Ma
- Environmental Sciences Group, Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA Wageningen, The Netherlands.
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Owojori OJ, Reinecke AJ, Rozanov AB. Influence of clay content on bioavailability of copper in the earthworm Eisenia fetida. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2010; 73:407-414. [PMID: 19962760 DOI: 10.1016/j.ecoenv.2009.03.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2009] [Revised: 03/25/2009] [Accepted: 03/31/2009] [Indexed: 05/28/2023]
Abstract
We investigated the effect of clay content on the bioavailability of copper to the earthworm Eisenia fetida, in the laboratory for 28 days using OECD artificial soil adjusted to 5%, 20% and 40% clay. Mortality, growth, cocoon production and internal copper concentrations were assessed in worms, and total, DTPA and CaCl(2) extractable copper in the substrates were also determined. The results showed that with increased clay content, there was significant reduction in internal Cu concentration of worms as well as toxicity of copper as shown by data for growth and mortality. However, internal copper concentrations of worms could not explain fully the observed toxicity in this study probably because of Cu regulation. Among the three extraction methods, DTPA extraction revealed the strongest relationship between partitioning and toxicity of Cu in this study. DTPA extract is thus a promising surrogate measure of bioavailability of Cu to earthworms. It is concluded that clay content has significant influence on the bioavailability of copper to earthworms and other similar species.
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Affiliation(s)
- Olugbenga J Owojori
- Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa.
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