Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Corbicula fluminea impact in Lake Maggiore (Italy): feeding plasticity and dietary overlap with native mussels |
| Abstract | Feeding plasticity of Corbicula fluminea is possibly of major importance for successfully competing indigenous bivalves in Lake Maggiore (Italy), thus promoting overdomination of the alien species in the area. After its first detection in 2010, our studies on spatial and temporal dynamics of abundance, biomass and population structure revealed that the newcomer spreads to over 1/3 of the lake littoral, reaching.103ind.m-2 in three years. A comparison with historical data evidenced a strong decline of the most abundant native mussel species (Unio mancus), whose actual density is reduced of about 75% after Corbicula establishment. Although native mussel depletion cannot be unequivocally attributed to the impact of Corbicula, change in bivalve species dominance is expected to impact ecosystem structure and functioning. Understanding the ecological role of invasive/native species is essential for predicting how the ecosystem might be altered after the invasion. To this aim, we compared daily filtration rates and food spectra of the two competitors- U. mancus and C. fluminea. Filtration rates were measured by the clearance method under different experimental conditions and over the whole diurnal cycle. Dietary sources and trophic niche overlap were determined by C, N stable isotope analyses of soft tissues of organisms collected along the season and at different developmental stages. Preliminary results suggest that success of Corbicula is also related to its ability to shift diet preferences along the seasons. Corbicula seems to stand already as a keystone littoral species in Lake Maggiore, likely being a strong competitor for space and food to native mussels (i.e. Unio mancus). |
| Source | World Congress of Malacology, Ponta Delgada, Isole Azzorre, 21-28 luglio 2013 |
| Keywords | Invasive bivalvesTrophic nicheCompetitionC and N stable isotopes |
| Year | 2013 |
| Type | Presentazione |
| Authors | Irene Guarneri; Alice Cardeccia; Rosaria Lauceri; Lyudmila Kamburska; Anna Visconti; Marina Manca; Nicoletta Riccardi |
| Text | 310095 2013 Invasive bivalves Trophic niche Competition C and N stable isotopes Corbicula fluminea impact in Lake Maggiore Italy feeding plasticity and dietary overlap with native mussels Irene Guarneri; Alice Cardeccia; Rosaria Lauceri; Lyudmila Kamburska; Anna Visconti; Marina Manca; Nicoletta Riccardi CNR ISE, Pallanza Verbania Feeding plasticity of Corbicula fluminea is possibly of major importance for successfully competing indigenous bivalves in Lake Maggiore Italy , thus promoting overdomination of the alien species in the area. After its first detection in 2010, our studies on spatial and temporal dynamics of abundance, biomass and population structure revealed that the newcomer spreads to over 1/3 of the lake littoral, reaching.103ind.m 2 in three years. A comparison with historical data evidenced a strong decline of the most abundant native mussel species Unio mancus , whose actual density is reduced of about 75% after Corbicula establishment. Although native mussel depletion cannot be unequivocally attributed to the impact of Corbicula, change in bivalve species dominance is expected to impact ecosystem structure and functioning. Understanding the ecological role of invasive/native species is essential for predicting how the ecosystem might be altered after the invasion. To this aim, we compared daily filtration rates and food spectra of the two competitors U. mancus and C. fluminea. Filtration rates were measured by the clearance method under different experimental conditions and over the whole diurnal cycle. Dietary sources and trophic niche overlap were determined by C, N stable isotope analyses of soft tissues of organisms collected along the season and at different developmental stages. Preliminary results suggest that success of Corbicula is also related to its ability to shift diet preferences along the seasons. Corbicula seems to stand already as a keystone littoral species in Lake Maggiore, likely being a strong competitor for space and food to native mussels i.e. Unio mancus . Published version ID_PUMA cnr.ise/2013 A3 028 World Congress of Malacology Ponta Delgada, Isole Azzorre 21 28 luglio 2013 Internazionale Contributo Corbicula fluminea impact in Lake Maggiore Italy feeding plasticity and dietary overlap with native mussels 2013_A3_028.pdf Presentazione VISCONTI ANNA nicolettarita.riccardi RICCARDI NICOLETTA lyudmilatodorova.kamburska KAMBURSKA LYUDMILA TODOROVA rosaria.lauceri LAUCERI ROSARIA marinamarcella.manca MANCA MARINA MARCELLA TA.P04.016.004 Ecologia teorica e applicata degli ecosistemi acquatici |