Evaluation of copper toxicity using site specific algae and water chemistry: Field validation of laboratory bioassays

Fawaz, Elyssa G.; Salam, Darine A.; Kamareddine, Lina A.

doi:10.1016/j.ecoenv.2018.02.054

Cited by 37 publications

(13 citation statements)

References 18 publications

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“…Toxicity of pollutants to green algae varied among species [28] and strains [29]. In the present study, based on locally collected alga strains, the as-obtained toxic assessment results should be more accurate to evaluate environmental risk of Cd 2+ to the local environments [29].…”

Section: Discussionmentioning

confidence: 81%

Early Toxic Effects of Cd2+ on Photosynthetic Activity of Six Freshwater Algae Species

Dong¹,

Zhang²,

Li³

et al. 2020

Pol. J. Environ. Stud.

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Cd 2+ is a serious environmental pollutant. Previous studies have investigated the effects of Cd 2+ on animals, plants and algae. However, the tested concentrations were generally higher than the actual environment level. The present study determined the effects of low concentrations of Cd 2+ (0.05 to 0.20 mg/L) on the chlorophyll fluorescent parameters of six local algae species in order to investigate the early toxicity of Cd 2+. The results showed that treatments with up to 0.20 mg/L Cd 2+ did not significantly affect population growth rate of S. quadricauda, C. pyrenoidosa, S. obliquus, N. palea, S. minutum and S. acutus. Treatments with 0.05-0.20 mg/L Cd 2+ significantly increased F v /F m in N. palea and S. minutum and decreased F v /F m in S. obliquus and S. acutus, but did not significantly affect F v /F m in C. pyrenoidosa. When exposed to Cd 2+ , rETR max was reduced in S. obliquus, C. pyrenoidosa, S. acutus and S. quadricauda, but was elevated in N. palea and S. minutum. Overall, trace Cd 2+ still revealed early toxicity to green algae. N. palea, S. minutum and C. pyrenoidosa were more tolerant to Cd 2+ than S. obliquus, S. acutus and S. quadricauda.

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Section: Discussionmentioning

confidence: 81%

Early Toxic Effects of Cd2+ on Photosynthetic Activity of Six Freshwater Algae Species

Dong¹,

Zhang²,

Li³

et al. 2020

Pol. J. Environ. Stud.

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“…Copper deficiency can lead to the inhibition of organism growth, photosynthesis, and respiration. However, excessive copper also has obvious toxic effects on algal bodies, even leading to plant death [61,62]. To adapt to an excessive copper environment, M.homosphaera may possess multiple mechanisms for ameliorating copper toxicity.…”

Section: Discussionmentioning

confidence: 99%

Genome analyses provide insights into the evolution and adaptation of the eukaryotic Picophytoplankton Mychonastes homosphaera

Liu

Shi

et al. 2020

BMC Genomics

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Background: Picophytoplankton are abundant and can contribute greatly to primary production in eutrophic lakes. Mychonastes species are among the common eukaryotic picophytoplankton in eutrophic lakes. We used thirdgeneration sequencing technology to sequence the whole genome of Mychonastes homosphaera isolated from Lake Chaohu, a eutrophic freshwater lake in China. Result: The 24.23 Mbp nuclear genome of M.homosphaera, harboring 6649 protein-coding genes, is more compact than the genomes of the closely related Sphaeropleales species. This genome streamlining may be caused by a reduction in gene family number, intergenic size and introns. The genome sequence of M.homosphaera reveals the strategies adopted by this organism for environmental adaptation in the eutrophic lake. Analysis of cultures and the protein complement highlight the metabolic flexibility of M.homosphaera, the genome of which encodes genes involved in light harvesting, carbohydrate metabolism, and nitrogen and microelement metabolism, many of which form functional gene clusters. Reconstruction of the bioenergetic metabolic pathways of M.homosphaera, such as the lipid, starch and isoprenoid pathways, reveals characteristics that make this species suitable for biofuel production. Conclusion: The analysis of the whole genome of M. homosphaera provides insights into the genome streamlining, the high lipid yield, the environmental adaptation and phytoplankton evolution.

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“…Both of them inhibited growth, cell permeability, photosynthesis and/or nitrogen fixation in algae [9][10][11][12][13][14], and altered alga communities [15]. These effects were influenced by environmental conditions and water chemistry, i.e., temperature [16], water hardnees and alkalinity [17]. However, most studies tested the toxicity of Hg 2+ and Cu 2+ at concentrations ranging from 0.5 mg/L to 100 mg/L.…”

mentioning

confidence: 99%

“…Toxicity of pollutants to green algae varied among species [14] and strains [17,18]. Investigations on more species and strains from local water bodies might more accurately evaluate pollution on local environments [17]. S. quadricauda and S. acutus are two dominant alga species in aquatic environments.…”

mentioning

confidence: 99%

Effects of Cu2+ and Hg2+ on Growth and Photosynthesis of Two Scenedesmus Species

Dong

Zhang

Wei

et al. 2020

Pol. J. Environ. Stud.

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Hg 2+ and Cu 2+ are two typical contaminants. Environmental pollution of Hg 2+ and Cu 2+ have been observed globally. Hg 2+ is high toxicity to human beings and environments due to its bioaccumulation and biomagnification within trophic levels [1]. Hg 2+ could be transformed to methylmercury, which is even more toxic [2]. Hg 2+ and derivates can cause severe disorders to organisms, including neurological, immunological, cardiac, motor, reproductive and genetic toxicity, and also is associated with Alzeihemer's, Parkinson's, autism, lupus, and amyotrophic lateral sclerosis [3,4]. Recent molecular studies have revealed that Hg 2+ treatment decreased many critical processes, including ferric iron binding, antioxidant activity, cellular homeostasis, and glutathione metabolism in copepod

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Evaluation of copper toxicity using site specific algae and water chemistry: Field validation of laboratory bioassays

Cited by 37 publications

References 18 publications

Early Toxic Effects of Cd<sup>2+</sup> on Photosynthetic Activity of Six Freshwater Algae Species

Early Toxic Effects of Cd<sup>2+</sup> on Photosynthetic Activity of Six Freshwater Algae Species

Genome analyses provide insights into the evolution and adaptation of the eukaryotic Picophytoplankton Mychonastes homosphaera

Effects of Cu<sup>2+</sup> and Hg<sup>2+</sup> on Growth and Photosynthesis of Two <i>Scenedesmus</i> Species

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