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Filtration and pedal-feeding contribution to the biomass of the freshwater bivalve Diplodon parallelopipedon : evidence from stable isotopes analysis

Marroni, Soledad ; Stábile, Franca LU orcid ; González‐Bergonzoni, Iván ; Teixeira de Mello, Franco ; Mazzeo, Néstor and Iglesias, Carlos (2025) In Hydrobiologia
Abstract
Bivalves are considered mainly filter-feeding organisms; they remove suspended particles including phytoplankton, zooplankton, and bacteria from the water column. Moreover, some bivalves can also feed via pedal-feeding, which is the uptake of organic matter from the sediment using cilia on the foot. <i>Diplodon parallelopipedon</i> is a native bivalve from South America, which can obtain their food by both feeding mechanisms. This work aimed to determine the relative importance of two food sources on <i>D. parallelopipedon</i> biomass: organic matter from the sediment and seston of the water column. Stable isotope analysis (δ13C/δ15N) was performed on two locations with lower/higher organic matter content. We used... (More)
Bivalves are considered mainly filter-feeding organisms; they remove suspended particles including phytoplankton, zooplankton, and bacteria from the water column. Moreover, some bivalves can also feed via pedal-feeding, which is the uptake of organic matter from the sediment using cilia on the foot. <i>Diplodon parallelopipedon</i> is a native bivalve from South America, which can obtain their food by both feeding mechanisms. This work aimed to determine the relative importance of two food sources on <i>D. parallelopipedon</i> biomass: organic matter from the sediment and seston of the water column. Stable isotope analysis (δ13C/δ15N) was performed on two locations with lower/higher organic matter content. We used Bayesian mixing models to determine the relative contribution of the two food sources to the biomass of <i>D. parallelopipedon</i> in each location. We used isotopic values of a filter-feeding bivalve <i>Limnoperna fortunei</i> as an integral signal of seston. For pedal-feeding, we used isotopic values of <i>Campsurus violaceous</i>. Both signals reflect isotopic variability at a larger temporal scale. Our results suggest that the biomass of <i>D. parallelopipedon</i> derives largely from the organic matter of sediments. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
Hydrobiologia
publisher
Springer Science and Business Media B.V.
external identifiers
  • scopus:105012258955
ISSN
0018-8158
DOI
10.1007/s10750-025-05950-x
language
English
LU publication?
yes
id
2f48c42a-8cf9-4dc3-9f01-5874e70fe89f
date added to LUP
2025-08-12 12:44:12
date last changed
2025-10-14 10:44:31
@article{2f48c42a-8cf9-4dc3-9f01-5874e70fe89f,
  abstract     = {{Bivalves are considered mainly filter-feeding organisms; they remove suspended particles including phytoplankton, zooplankton, and bacteria from the water column. Moreover, some bivalves can also feed via pedal-feeding, which is the uptake of organic matter from the sediment using cilia on the foot. &lt;i&gt;Diplodon parallelopipedon&lt;/i&gt; is a native bivalve from South America, which can obtain their food by both feeding mechanisms. This work aimed to determine the relative importance of two food sources on &lt;i&gt;D. parallelopipedon&lt;/i&gt; biomass: organic matter from the sediment and seston of the water column. Stable isotope analysis (δ13C/δ15N) was performed on two locations with lower/higher organic matter content. We used Bayesian mixing models to determine the relative contribution of the two food sources to the biomass of &lt;i&gt;D. parallelopipedon&lt;/i&gt; in each location. We used isotopic values of a filter-feeding bivalve &lt;i&gt;Limnoperna fortunei&lt;/i&gt; as an integral signal of seston. For pedal-feeding, we used isotopic values of &lt;i&gt;Campsurus violaceous&lt;/i&gt;. Both signals reflect isotopic variability at a larger temporal scale. Our results suggest that the biomass of &lt;i&gt;D. parallelopipedon&lt;/i&gt; derives largely from the organic matter of sediments.}},
  author       = {{Marroni, Soledad and Stábile, Franca and González‐Bergonzoni, Iván and Teixeira de Mello, Franco and Mazzeo, Néstor and Iglesias, Carlos}},
  issn         = {{0018-8158}},
  language     = {{eng}},
  month        = {{07}},
  publisher    = {{Springer Science and Business Media B.V.}},
  series       = {{Hydrobiologia}},
  title        = {{Filtration and pedal-feeding contribution to the biomass of the freshwater bivalve Diplodon parallelopipedon : evidence from stable isotopes analysis}},
  url          = {{http://dx.doi.org/10.1007/s10750-025-05950-x}},
  doi          = {{10.1007/s10750-025-05950-x}},
  year         = {{2025}},
}