Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics
Odonata are biodiversity indicators that adequately represent many aquatic and semi-aquatic animal species. We recorded over two field seasons a rich lentic community of Odonata (18 species) in a large artificial freshwater reservoir (ca. 55 ha) built 40 years ago. The release of water from the dam...
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MDPI AG
2022-11-01
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| Series: | Diversity |
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| Online Access: | https://www.mdpi.com/1424-2818/14/12/1021 |
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| author | Nina Melendez Virginie M. Stevens Michel Baguette |
| author_facet | Nina Melendez Virginie M. Stevens Michel Baguette |
| author_sort | Nina Melendez |
| collection | DOAJ |
| description | Odonata are biodiversity indicators that adequately represent many aquatic and semi-aquatic animal species. We recorded over two field seasons a rich lentic community of Odonata (18 species) in a large artificial freshwater reservoir (ca. 55 ha) built 40 years ago. The release of water from the dam in summer for crop irrigation leads to the desiccation of large parts of the reservoir, which prevents the reproduction of half of the species of this Odonata community. We identify two adaptations that allow eight species to cope with desiccation, i.e., a precocious breeding period allowing the emergence of adults before the retreat of water, or a delayed adult emergence due to egg diapause from oviposition to the end of winter. The reservoir acts thus as an ecological trap for individuals of 10 species that developed elsewhere and were attracted to the site without successfully breeding there. As consequence of the local population extinction at each generation, the presence of individuals of these 10 species at the reservoir depends on source-sink population dynamics in the landscape. In the context of global warming that encourages the creation of artificial freshwater reservoirs, the multiplication of such sinks could threaten the persistence in the landscape of species maladapted to desiccation. |
| first_indexed | 2024-03-09T17:07:03Z |
| format | Article |
| id | doaj.art-0c05cd76190344548f6e988cb9707034 |
| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-09T17:07:03Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diversity |
| spelling | doaj.art-0c05cd76190344548f6e988cb97070342023-11-24T14:22:14ZengMDPI AGDiversity1424-28182022-11-011412102110.3390/d14121021Freshwater Reservoir, Ecological Traps and Source-Sink DynamicsNina Melendez0Virginie M. Stevens1Michel Baguette2Centre National de la Recherche Scientifique, SETE Station d’Ecologie Théorique et Expérimentale, CNRS UAR 2029, 09200 Moulis, FranceCentre National de la Recherche Scientifique, SETE Station d’Ecologie Théorique et Expérimentale, CNRS UAR 2029, 09200 Moulis, FranceCentre National de la Recherche Scientifique, SETE Station d’Ecologie Théorique et Expérimentale, CNRS UAR 2029, 09200 Moulis, FranceOdonata are biodiversity indicators that adequately represent many aquatic and semi-aquatic animal species. We recorded over two field seasons a rich lentic community of Odonata (18 species) in a large artificial freshwater reservoir (ca. 55 ha) built 40 years ago. The release of water from the dam in summer for crop irrigation leads to the desiccation of large parts of the reservoir, which prevents the reproduction of half of the species of this Odonata community. We identify two adaptations that allow eight species to cope with desiccation, i.e., a precocious breeding period allowing the emergence of adults before the retreat of water, or a delayed adult emergence due to egg diapause from oviposition to the end of winter. The reservoir acts thus as an ecological trap for individuals of 10 species that developed elsewhere and were attracted to the site without successfully breeding there. As consequence of the local population extinction at each generation, the presence of individuals of these 10 species at the reservoir depends on source-sink population dynamics in the landscape. In the context of global warming that encourages the creation of artificial freshwater reservoirs, the multiplication of such sinks could threaten the persistence in the landscape of species maladapted to desiccation.https://www.mdpi.com/1424-2818/14/12/1021freshwater ecosystembiodiversitydesiccationOdonatadragonflydamselfly |
| spellingShingle | Nina Melendez Virginie M. Stevens Michel Baguette Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics Diversity freshwater ecosystem biodiversity desiccation Odonata dragonfly damselfly |
| title | Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics |
| title_full | Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics |
| title_fullStr | Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics |
| title_full_unstemmed | Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics |
| title_short | Freshwater Reservoir, Ecological Traps and Source-Sink Dynamics |
| title_sort | freshwater reservoir ecological traps and source sink dynamics |
| topic | freshwater ecosystem biodiversity desiccation Odonata dragonfly damselfly |
| url | https://www.mdpi.com/1424-2818/14/12/1021 |
| work_keys_str_mv | AT ninamelendez freshwaterreservoirecologicaltrapsandsourcesinkdynamics AT virginiemstevens freshwaterreservoirecologicaltrapsandsourcesinkdynamics AT michelbaguette freshwaterreservoirecologicaltrapsandsourcesinkdynamics |