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Filtration, ingestion, and food selectivity in the freshwater bivalves Diplodon parodizi (native) and Corbicula fluminea (invasive).

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Title: Filtration, ingestion, and food selectivity in the freshwater bivalves Diplodon parodizi (native) and Corbicula fluminea (invasive).
Authors: Prestes, Juliani Giselli1,2 (AUTHOR) juliani.jg@hotmail.com, Pedroso, Clemerson Richard1,2 (AUTHOR), de Siqueira Pereira, Hugo1 (AUTHOR), Miiller, Natali Oliva Roman1,2 (AUTHOR), Rennó Braga, Raul1,2 (AUTHOR), Vitule, Jean Ricardo Simões1 (AUTHOR)
Source: Hydrobiologia. Jun2026, Vol. 853 Issue 10, p2889-2907. 19p.
Subjects: Ingestion, Corbicula fluminea, Bivalves, Food preferences, Introduced species, Native species, Freshwater mussels, Food consumption
Abstract: This study evaluated filtration, ingestion, and food selectivity of the bivalves Diplodon parodizi (native) and Corbicula fluminea (invasive). We hypothesized that these bivalves differ in filtration and ingestion rates as well as in food selectivity, showing distinct phytoplankton preferences. To test this, both bivalves were exposed to a mixed phytoplankton community composed of diatoms, chlorophytes, cyanobacteria, charophytes, rhodophytes, dinoflagellates, and xanthophytes in aquaria for two hours. Afterward, the bivalves were removed, and the remaining particles were filtered to estimate filtration, ingestion and food selectivity. No significant differences in filtration rates were found between the two species (P = 0.11). A significant difference in diatom ingestion rates was observed between the bivalves, with D. parodizi ingesting more cells than C. fluminea (P = 0.0229). Food selectivity analysis showed that D. parodizi had stronger negative selection for cyanobacteria, dinoflagellates, xanthophytes, and diatoms, while C. fluminea showed negative selection only for dinoflagellates and diatoms. Although both species were able to feed on all phytoplankton groups, the broader avoidance by the native species may suggest a disadvantage when sharing resources with invaders. These findings contribute to a better understanding of dietary differences between native and invasive bivalves and their potential ecological impacts. [ABSTRACT FROM AUTHOR]
Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Filtration, ingestion, and food selectivity in the freshwater bivalves Diplodon parodizi (native) and Corbicula fluminea (invasive).
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  Data: <searchLink fieldCode="JN" term="%22Hydrobiologia%22">Hydrobiologia</searchLink>. Jun2026, Vol. 853 Issue 10, p2889-2907. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Ingestion%22">Ingestion</searchLink><br /><searchLink fieldCode="DE" term="%22Corbicula+fluminea%22">Corbicula fluminea</searchLink><br /><searchLink fieldCode="DE" term="%22Bivalves%22">Bivalves</searchLink><br /><searchLink fieldCode="DE" term="%22Food+preferences%22">Food preferences</searchLink><br /><searchLink fieldCode="DE" term="%22Introduced+species%22">Introduced species</searchLink><br /><searchLink fieldCode="DE" term="%22Native+species%22">Native species</searchLink><br /><searchLink fieldCode="DE" term="%22Freshwater+mussels%22">Freshwater mussels</searchLink><br /><searchLink fieldCode="DE" term="%22Food+consumption%22">Food consumption</searchLink>
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  Data: This study evaluated filtration, ingestion, and food selectivity of the bivalves Diplodon parodizi (native) and Corbicula fluminea (invasive). We hypothesized that these bivalves differ in filtration and ingestion rates as well as in food selectivity, showing distinct phytoplankton preferences. To test this, both bivalves were exposed to a mixed phytoplankton community composed of diatoms, chlorophytes, cyanobacteria, charophytes, rhodophytes, dinoflagellates, and xanthophytes in aquaria for two hours. Afterward, the bivalves were removed, and the remaining particles were filtered to estimate filtration, ingestion and food selectivity. No significant differences in filtration rates were found between the two species (P = 0.11). A significant difference in diatom ingestion rates was observed between the bivalves, with D. parodizi ingesting more cells than C. fluminea (P = 0.0229). Food selectivity analysis showed that D. parodizi had stronger negative selection for cyanobacteria, dinoflagellates, xanthophytes, and diatoms, while C. fluminea showed negative selection only for dinoflagellates and diatoms. Although both species were able to feed on all phytoplankton groups, the broader avoidance by the native species may suggest a disadvantage when sharing resources with invaders. These findings contribute to a better understanding of dietary differences between native and invasive bivalves and their potential ecological impacts. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Corbicula fluminea
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      – SubjectFull: Food preferences
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      – TitleFull: Filtration, ingestion, and food selectivity in the freshwater bivalves Diplodon parodizi (native) and Corbicula fluminea (invasive).
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              Text: Jun2026
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