Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Zooplankton predators and prey: trophic roles and seasonality of C,N isotopic signatures |
| Abstract | Crustacean zooplankton biomass seasonal dynamics in the open water of large, deep lakes is characterized by two main phases: a spring-summer peak, during which primary consumers prevail; and an autumn-winter phase, during which contribution of secondary consumers to zooplankton standing stock biomass is far from negligible. The two phases are traced by different ?15N signatures of mesozooplankton >=450µm size: lower, under prevalence of primary, and higher, under prevalence of secondary, consumers. Differences in contribution of the two groups are largely underestimated in e.g. models dealing with biomagnification and the role of zooplankton in transfer of pollutants to fish. Based on a three-year study on Lake Maggiore, we provide evidence for a need to incorporate quantitative estimates of trophic role within crustacean zooplankton in view of gaining reliable estimates of energy, and pollutants, fluxes through the pelagic food web. |
| Source | SIL XXXII Congress of the International Society of Limnology, Budapest, Ungheria, 4-9 agosto 2013 |
| Keywords | Crustacean zooplanktonPrimary and secondary consumersPersistent organic pollutantsStable isotope analysis |
| Year | 2013 |
| Type | Presentazione |
| Authors | Roberta Piscia; Roberta Bettinetti; Marina Manca |
| Text | 282430 2013 Crustacean zooplankton Primary and secondary consumers Persistent organic pollutants Stable isotope analysis Zooplankton predators and prey trophic roles and seasonality of C,N isotopic signatures Roberta Piscia; Roberta Bettinetti; Marina Manca Roberta Piscia; Marina Manca CNR ISE VB Roberta Bettinetti; Universita dell Insubria Como Crustacean zooplankton biomass seasonal dynamics in the open water of large, deep lakes is characterized by two main phases a spring summer peak, during which primary consumers prevail; and an autumn winter phase, during which contribution of secondary consumers to zooplankton standing stock biomass is far from negligible. The two phases are traced by different 15N signatures of mesozooplankton >=450µm size lower, under prevalence of primary, and higher, under prevalence of secondary, consumers. Differences in contribution of the two groups are largely underestimated in e.g. models dealing with biomagnification and the role of zooplankton in transfer of pollutants to fish. Based on a three year study on Lake Maggiore, we provide evidence for a need to incorporate quantitative estimates of trophic role within crustacean zooplankton in view of gaining reliable estimates of energy, and pollutants, fluxes through the pelagic food web. Published version In SIL XXXII Congress of the International Society of Limnology Budapest, Ungheria, 4 9 agosto 2013 . SIL XXXII Congress of the International Society of Limnology Budapest, Ungheria 4 9 agosto 2013 Internazionale Contributo PPT PPT_SIL_Predators_PIscia.pdf Presentazione roberta.piscia PISCIA ROBERTA marinamarcella.manca MANCA MARINA MARCELLA TA.P04.016.004 Ecologia teorica e applicata degli ecosistemi acquatici |