Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Stable Isotope Analysis and Persistent Organic Pollutants in Crustacean Zooplankton: The Role of Size and Seasonality |
| Abstract | 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 delta N-15 signatures in two size fractions, >= 450 mu m and >= 850 mu m, 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 delta N-15 results correlated to pollutant concentrations, by means of taxa contribution to standing stock biomass and delta N-15 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. |
| Source | Water (Basel) 11 (7) |
| Keywords | stable isotope analysispersistent organic pollutantscrustacean zooplanktonfreshwatersize fractionsseasonality |
| Journal | Water (Basel) |
| Editor | Molecular Diversity Preservation International, Basel, |
| Year | 2019 |
| Type | Articolo in rivista |
| DOI | 10.3390/w11071490 |
| Authors | Piscia, Roberta; Mazzoni, Michela; Bettinetti, Roberta; Caroni, Rossana; Cicala, Davide; Manca, Marina Marcella |
| Text | 407940 2019 10.3390/w11071490 ISI Web of Science WOS 000480632300175 stable isotope analysis persistent organic pollutants crustacean zooplankton freshwater size fractions seasonality Stable Isotope Analysis and Persistent Organic Pollutants in Crustacean Zooplankton The Role of Size and Seasonality Piscia, Roberta; Mazzoni, Michela; Bettinetti, Roberta; Caroni, Rossana; Cicala, Davide; Manca, Marina Marcella IRSA CNR; DiSUIT 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 delta N 15 signatures in two size fractions, >= 450 mu m and >= 850 mu m, 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 delta N 15 results correlated to pollutant concentrations, by means of taxa contribution to standing stock biomass and delta N 15 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. 11 Published version Articolo in rivista Molecular Diversity Preservation International 2073 4441 Water Basel Water Basel Water Basel Water. Basel marinamarcella.manca MANCA MARINA MARCELLA CICALA DAVIDE CARONI ROSSANA roberta.piscia PISCIA ROBERTA |