Combined effects of nutrients and trace metals on chironomid composition and morphology in a heavily polluted lake in central China since the early 20th century

Cao, Yanmin; Zhang, Enlou; Tang, Hongqu; Langdon, Peter G.; Ning, Dongliang; Zheng, Wenxiu

doi:10.1007/s10750-016-2810-y

Cited by 13 publications

(4 citation statements)

References 54 publications

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“…Chironomus plumosus specimens were classified according to the protocol for morphological response of the mentum, consisting of three classes [22,[42][43][44]62]: Class 1 (CL. 1) specimens without morphological deformity or with mechanical damages (broken or worn menta or teeth) [4,5,[63][64][65]; Class 2 (CL. 2) specimens with weak deformity (one or two round/filed teeth; one missing or additional tooth; one bifid tooth; one serrate tooth; two joined teeth; weak asymmetry); Class 3 (CL.…”

Section: Discussionmentioning

confidence: 99%

Use of Larval Morphological Deformities in Chironomus plumosus (Chironomidae: Diptera) as an Indicator of Freshwater Environmental Contamination (Lake Trasimeno, Italy)

Goretti

Pallottini

Pagliarini

et al. 2019

Water

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The mentum deformity incidence in Chironomus plumosus larvae to assess the environmental contamination level in Lake Trasimeno, Central Italy, was investigated. The survey lasted from May 2018 to August 2019. Fifty-one samplings were carried out: 34 in the littoral zone and 17 in the central zone. The deformity assessment was based on 737 and 2767 larval specimens of C. plumosus collected from the littoral and central zones, respectively. Comparison of the larval morphometric variables between normal and deformed specimens highlighted that the deformities did not cause alterations of the larval growth. The deformity incidence amounted to 7.22% in the whole Trasimeno’s ecosystem, reaching 8.28% in the littoral zone and 6.94% in the central zone. Among the different seasonal cohorts, the spring cohort had overall the highest deformity value (11.41%). The deformity type assessment protocol highlighted that the most common deformity type was “round/filed teeth” (64%). The results of this 2018–2019 survey revealed a low deformity incidence, within the background range of relatively low-impacted freshwaters. Comparison with previous investigations (2000–2010) of the same habitat showed a clear decrease of the deformity incidence. This study further contributes to the evaluation of the mentum deformity in chironomids that represent an indicator endpoint of the anthropogenic contamination level in freshwaters.

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Section: Discussionmentioning

confidence: 99%

Use of Larval Morphological Deformities in Chironomus plumosus (Chironomidae: Diptera) as an Indicator of Freshwater Environmental Contamination (Lake Trasimeno, Italy)

Goretti

Pallottini

Pagliarini

et al. 2019

Water

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“…Similar to teratological diatoms, chironomid mouthpart deformities have been reported in higher percentages when exposed to various metals and other toxic substances. , However, deformities can also be natural occurrences . A recent meta-analysis of studies on chironomid mouthpart deformities emphasized the importance of understanding background deformity rates in a community or population before asserting causal linkages to pollutant exposure .…”

Section: Biological Organisms That Can Be Studied From Sediment Coresmentioning

confidence: 99%

“…A recent meta-analysis of studies on chironomid mouthpart deformities emphasized the importance of understanding background deformity rates in a community or population before asserting causal linkages to pollutant exposure . Since one of the main advantages of a paleolimnological approach is the characterization of background conditions typically over decadal to centennial (and even millennial) time scales, and chironomid mouthparts are well preserved in sediments, paleolimnology may represent a promising tool for refining the use of chironomid mouthpart deformities as an early warning bioindicator of pollutant exposure …”

Section: Biological Organisms That Can Be Studied From Sediment Coresmentioning

confidence: 99%

“…77 Since one of the main advantages of a paleolimnological approach is the characterization of background conditions typically over decadal to centennial (and even millennial) time scales, and chironomid mouthparts are well preserved in sediments, paleolimnology may represent a promising tool for refining the use of chironomid mouthpart deformities as an early warning bioindicator of pollutant exposure. 74 Cladocera. Cladocera (Crustacea, Branchiopoda) are the main group of zooplankton that leave abundant and readily identifiable remains preserved in sediments cores and provide several opportunities for the development of paleo-ecotoxicology.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

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Paleo-ecotoxicology: What Can Lake Sediments Tell Us about Ecosystem Responses to Environmental Pollutants?

Korosi

Thienpont

Smol

et al. 2017

Environ. Sci. Technol.

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The development of effective risk reduction strategies for aquatic pollutants requires a comprehensive understanding of toxic impacts on ecosystems. Classical toxicological studies are effective for characterizing pollutant impacts on biota in a controlled, simplified environment. Nonetheless, it is well-acknowledged that predictions based on the results of these studies must be tested over the long-term in a natural ecosystem setting to account for increased complexity and multiple stressors. Paleolimnology (the study of lake sediment cores to reconstruct environmental change) can address many key knowledge gaps. When used as part of a weight-of-evidence framework with more traditional approaches in ecotoxicology, it can facilitate rapid advances in our understanding of the chronic effects of pollutants on ecosystems in an environmentally realistic, multistressor context. Paleolimnology played a central role in the Acid Rain debates, as it was instrumental in demonstrating industrial emissions caused acidification of lakes and associated ecosystem-wide impacts. "Resurrection Ecology" (hatching dormant resting eggs deposited in the past) records evolutionary responses of populations to chronic pollutant exposure. With recent technological advances (e.g., geochemistry, genomic approaches), combined with an emerging paleo-ecotoxicological framework that leverages strengths across multiple disciplines, paleolimnology will continue to provide valuable insights into the most pressing questions in ecotoxicology.

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Subfossil Chironomid Assemblages as Indicators of Remedial Efficacy in the Historically Contaminated St. Lawrence River at Cornwall, Ontario

Armstrong,

Moir,

Ridal

et al. 2023

Arch Environ Contam Toxicol

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Long-term data are required to quantify the impacts of historic industrial pollution and subsequent remedial action on the nearshore benthic community in the St. Lawrence River Area of Concern at Cornwall, Ontario. Speci cally, high-quality temporal records are needed to understand changes in benthic invertebrate assemblages in response to multiple possible drivers including industrial pollution, environmental heterogeneity, and climate warming. We compare long-term records of subfossil chironomid assemblages and geochemical variables among sediment cores from two Cornwall sites with differing pollution histories and a minimally disturbed downstream reference site. Chironomids were functionally absent from the Cornwall sediment cores when mercury and zinc concentrations were elevated. As metal concentrations decreased in more recent sediment intervals, chironomid abundance and the relative abundance of pollution-sensitive taxa increased. Recently deposited sediment in all three sediment cores display increased relative abundance of warm-water, macrophyte-associated taxa. We conclude that these temporal changes in chironomid assemblages provide evidence for ecological recovery for both of the impacted sites, consistent with the objectives of the current management strategy. These ndings advance our understanding of industrial impacts on uvial chironomid ecology, directly inform local management strategies, and further develop the application of chironomids as bioindicators for contaminated sediments.

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Combined effects of nutrients and trace metals on chironomid composition and morphology in a heavily polluted lake in central China since the early 20th century

Cited by 13 publications

References 54 publications

Use of Larval Morphological Deformities in Chironomus plumosus (Chironomidae: Diptera) as an Indicator of Freshwater Environmental Contamination (Lake Trasimeno, Italy)

Use of Larval Morphological Deformities in Chironomus plumosus (Chironomidae: Diptera) as an Indicator of Freshwater Environmental Contamination (Lake Trasimeno, Italy)

Paleo-ecotoxicology: What Can Lake Sediments Tell Us about Ecosystem Responses to Environmental Pollutants?

Subfossil Chironomid Assemblages as Indicators of Remedial Efficacy in the Historically Contaminated St. Lawrence River at Cornwall, Ontario

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