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Open AccessArticle

Stable Isotope Analysis and Persistent Organic Pollutants in Crustacean Zooplankton: The Role of Size and Seasonality

1
Water Research Institute—National Research Council, IRSA-CNR, Largo Tonolli 50, 28922 Verbania, Italy
2
DiSUIT, Department of Human Sciences and Innovation for the Territory, Via S. Abbondio 12, 22100 Como (CO), Italy
*
Author to whom correspondence should be addressed.
Water 2019, 11(7), 1490; https://doi.org/10.3390/w11071490
Received: 12 June 2019 / Revised: 12 July 2019 / Accepted: 14 July 2019 / Published: 18 July 2019
Zooplankton is crucial for the transfer of matter, energy, and pollutants through aquatic food webs. Primary and secondary consumers contribute to the abundance and standing stock biomass, which both vary seasonally. By means of taxa- and size-specific carbon and nitrogen stable isotope analysis, the path of pollutants through zooplankton is traced and seasonal changes are addressed, in an effort to understand pollutant dynamics in the pelagic food web. We analyzed zooplankton plurennial changes in concentration of polychlorinated biphenyls (PCBs) and dichlorodiphenyltrichloroethane and its relatives (DDTs) and in taxa-specific δ15N signatures in two size fractions, ≥450 µm and ≥850 µm, representative of the major part of zooplankton standing stock biomass and of the fraction to which fish predation is mainly directed, respectively. Our work is aimed at verifying: (1) A link between nitrogen isotopic signatures and pollutant concentrations; (2) the predominance of size versus seasonality for concentration of pollutants; and (3) the contribution of secondary versus primary consumers to carbon and nitrogen isotopic signatures. We found a prevalence of seasonality versus size in pollutant concentrations and isotopic signatures. The taxa-specific δ15N results correlated to pollutant concentrations, by means of taxa contribution to standing stock biomass and δ15N isotopic signatures. This is a step forward to understanding the taxa-specific role in pollutant transfer to planktivores and of zooplankton enrichment in PCBs and DDTs. View Full-Text
Keywords: stable isotope analysis; persistent organic pollutants; crustacean zooplankton; freshwater; size fractions; seasonality stable isotope analysis; persistent organic pollutants; crustacean zooplankton; freshwater; size fractions; seasonality
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MDPI and ACS Style

Piscia, R.; Mazzoni, M.; Bettinetti, R.; Caroni, R.; Cicala, D.; Manca, M.M. Stable Isotope Analysis and Persistent Organic Pollutants in Crustacean Zooplankton: The Role of Size and Seasonality. Water 2019, 11, 1490. https://doi.org/10.3390/w11071490

AMA Style

Piscia R, Mazzoni M, Bettinetti R, Caroni R, Cicala D, Manca MM. Stable Isotope Analysis and Persistent Organic Pollutants in Crustacean Zooplankton: The Role of Size and Seasonality. Water. 2019; 11(7):1490. https://doi.org/10.3390/w11071490

Chicago/Turabian Style

Piscia, Roberta; Mazzoni, Michela; Bettinetti, Roberta; Caroni, Rossana; Cicala, Davide; Manca, Marina M. 2019. "Stable Isotope Analysis and Persistent Organic Pollutants in Crustacean Zooplankton: The Role of Size and Seasonality" Water 11, no. 7: 1490. https://doi.org/10.3390/w11071490

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