Sustainability of gastropod introduction for ecological engineering solution in infiltration basins: feeding strategy of V. viviparus
The present study aimed at evaluating the sustainability of ecological engineering solutions based on the introduction of the gastropod V. viviparus for maintaining the hydrological performances of infiltration basins clogged by benthic biofilms. This sustainability depends on the ability of gastropods to deal with variations in trophic resources throughout seasonal changes and so their feeding strategy. It is expected from literature that V. viviparus is a generalist species, well adapted for ecological engineering approaches. With this objective, laboratory and field experiments were developed to measure the ability of gastropods to maintain energy body stores under several food sources and seasons, in relation with their physiological state. Our results showed that V. viviparus was not a strict generalist: it tended to be more efficient to constitute energy reserves when feeding on algae under laboratory conditions and its energy stores were positively correlated with primary productivity of the benthic biofilm in the field. Despite this higher efficiency of V. viviparus to produce energy reserves from algal resources, the survival and the levels of energy reserves measured on the field, even when trophic conditions were the harshest (low algal development), make this species a good candidate for ecological engineering approaches.
KeywordsTrophic strategy Ecological engineering Biofilm Physiological state Gastropod Algae
We express our gratitude to Pauline Barbe and Mélissa Tenaille for their help during the collection of organisms and the experimentation, and to Laurent Simon and Félix Vallier who were involved in chemical analyses. Our thanks also go to Météo-France and Eau du Grand Lyon for the data they provided. This research was done on the Research Platform of Crépieux-Charmy (Plateforme de Recherche de Crépieux-Charmy) and received financial and technical support from the Lyon Metropole and Veolia Water (Eau du Grand Lyon).
All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Jean-Bastien Gambonnet, Laurence Volatier, Florian Mermillod-Blondin, Frédéric Hervant and Valerian Estragnat. The first draft of the manuscript was written by Valerian Estragnat, Florian Mermillod-Blondin and Laurence Volatier. All authors contributed critically to the drafts and gave final approval for publication.
This study was funded by the Lyon Metropole and Veolia Water (Eau du Grand Lyon).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national and/or institutional guidelines for the care and use of animals were followed.
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