Metal uptake of two ecophysiologically different earthworms (Eisenia fetida and Aporrectodea caliginosa) exposed to ultramafic soils

Maleri, Rudolf A.; Reinecke, A. J.; Reinecke, S. A.

doi:10.1016/j.apsoil.2007.08.010

Cited by 32 publications

(11 citation statements)

References 31 publications

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“…At a given concentration when the metal uptake by an individual worm reaches a distinct threshold level, the worms actively eliminate the excess in their cast. This implies that the elimination process is based on the transport of Cd into internal storage compartments [ 44 ]. BCF for both worm species gradually decreased with the increase of Cd concentration in soil ( Table 4 ).…”

Section: Discussionmentioning

confidence: 99%

“…This supports the observation that, at low Cd concentration, earthworms absorb and accumulate Cd in their tissues. In contrast, at higher concentrations, earthworms could absorb Cd but not to accumulate it, and thus, worms eliminate Cd into their cast [ 44 ]. When the bulk soils are taken up by worms, it passes through their guts; enzyme, surfactant and the mucus secreted into the content changes the metal form [ 45 ].…”

Section: Discussionmentioning

confidence: 99%

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Earthworms, Rice Straw, and Plant Interactions Change the Organic Connections in Soil and Promote the Decontamination of Cadmium in Soil

Elyamine

Moussa

Ismael

et al. 2018

IJERPH

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The joint effects of earthworms and crop straw on toxic metal speciation are not clear, and very limited information is available regarding the effects of their interaction on Cd mobility in Cd contaminated soil or in remediation processes involving plants. This study evaluated their impacts on Cd mobile form changes in soil and their effects on Cd uptake by plants. Treatments included both planted and unplanted-Cd-contaminated soil with or without rice straw and/or earthworms. The results revealed that earthworms, rice straw, and plant interactions change the Cd mobile forms in soil. The order of Cd concentration of different chemical forms was as follows: exchangeable > residual > bound to Fe-Mn oxide > bound to organic matter for earthworms, and exchangeable > bound to organic matter > residual > bound to Fe-Mn oxide for rice straw treatment, with a recovery rate of 96 ± 3%. The accumulation of Cd in plants increased in the presence of earthworms and decreased in the presence of rice straw. FT-IR spectra indicated that the degradation of rice straw increases C–O, C–O–H, C–H, and O–H functional groups which could complex with Cd ions. These findings highlighted that earthworms’ activities and crop straw can modify soil properties and structure and promote the remediation of heavy metal. This study suggests that the ecological context of remediation instead of being limiting on soil-earthworms-plant interaction, should integrate the natural resources forsaken which can provide a positive influence on both plant health and the remediation of heavy metal in contaminated soil.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Earthworms, Rice Straw, and Plant Interactions Change the Organic Connections in Soil and Promote the Decontamination of Cadmium in Soil

Elyamine

Moussa

Ismael

et al. 2018

IJERPH

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“…Thereby, earthworms developed a strategy by which, when the uptake chemical reaches a certain concentration level, the worms actively could eliminate the excess of pollutant in their corresponding cast [ 35 ]. This implies an uptake/elimination process based on the transport of metals into internal storage compartments and its excretion thereafter [ 51 ]. BAF for both worm species gradually decreased with the increase of Cd concentration in soil ( Table 4 ).…”

Section: Discussionmentioning

confidence: 99%

Phenanthrene Mitigates Cadmium Toxicity in Earthworms Eisenia fetida (Epigeic Specie) and Aporrectodea caliginosa (Endogeic Specie) in Soil

Elyamine

Afzal

Rana

et al. 2018

IJERPH

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In classical toxicology studies, the interaction of combined doses of chemicals with dissimilar modes of toxic action in soil is complex and depending on the end point investigated and the experimental protocol employed. This study was used to examine the interactive effect of phenanthrene and Cadmium on two ecologically different species of earthworms; Eisenia. fetida and Aporrectodea. caliginosa. This interactive effect was scrutinized by using the acute toxicity test with the concentrations of 2.51 mg kg−1 and 3.74 mg kg−1, respectively, being lethal for 50% of E. fetida and A. caliginosa. The results showed that in the mixture treatment, phenanthrene at 5, 10, 15 and 20 mg kg−1 significantly mitigated both earthworms species mortality and body-mass loss. Moreover, the factor of Cd accumulated in E. fetida and A. caliginosa tissues was significantly decreased by about 12% and 16%, respectively. Linear regression correlation coefficient revealed that the reduction of both earthworm species mortality was negatively and significantly correlated (r2 = 0.98 ± 0.40 and 1 ± 3.9 p < 0.001) with phenanthrene concentration in soil. However, over 20 mg kg−1 of phenanthrene, both organisms mortality rate increased again, as was the Bioaccumulation factor of phenanthrene. Thus, this study proposes that the antagonistical effect of phenanthrene on Cd at a degree of concentration can be used to mitigate Cd effect on soil living organisms. However, as an implication of these results, the interpretation of standardized toxicity bioassays, including whole effluent toxicity tests and single-compound toxicity tests, should be performed with caution. In addition, risk assessment protocols for environment pollution by a mixture of metals and polycyclic aromatic hydrocarbons should include robust methods that can detect possible interactive effects between contaminants to optimize environmental protection.

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“…Kennette et al, 2002;Nahmani et al, 2007;Suthar et al, 2008;Goix et al, 2015). Furthermore, chemical analysis of earthworms may provide an indication of bioavailable amounts of heavy metals (Maleri et al, 2008;Ruiz et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Considering the various factors influencing element availability in soil, more specific available pools may be defined (Harmsen, 2007;Peijnenburg et al, 2007;Maleri et al, 2008;Alvarenga et al, 2012): 1) the "effective available" pool consisting of water-soluble and extractable fractions, which are the most mobile and very active pool of a chemical element, mainly regulated by rapid reactions in soil such as water solubilization, ionic exchange and acid dissolution; 2) the "potentially available" pool, consisting of reducible and oxidable fractions, namely the leachable and partly active pool mainly mobilizable by redox reactions; 3) the "bioaccessible" pool, the amount of a chemical element that can be released through digestion by water and ingested soil; this is the fraction most available for intestinal uptake.…”

Section: Introductionmentioning

confidence: 99%

Chemical and biological methods to evaluate the availability of heavy metals in soils of the Siena urban area (Italy)

Nannoni

Protano

2016

Science of The Total Environment

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Metal uptake of two ecophysiologically different earthworms (Eisenia fetida and Aporrectodea caliginosa) exposed to ultramafic soils

Cited by 32 publications

References 31 publications

Earthworms, Rice Straw, and Plant Interactions Change the Organic Connections in Soil and Promote the Decontamination of Cadmium in Soil

Earthworms, Rice Straw, and Plant Interactions Change the Organic Connections in Soil and Promote the Decontamination of Cadmium in Soil

Phenanthrene Mitigates Cadmium Toxicity in Earthworms Eisenia fetida (Epigeic Specie) and Aporrectodea caliginosa (Endogeic Specie) in Soil

Chemical and biological methods to evaluate the availability of heavy metals in soils of the Siena urban area (Italy)

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