Cargando…

Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish

Although intraspecific variability is now widely recognized as affecting evolutionary and ecological processes, our knowledge on the importance of intraspecific variability within invasive species is still limited. This is despite the fact that understanding the linkage between within‐population mor...

Descripción completa

Detalles Bibliográficos
Autores principales: Lang, Iris, Evangelista, Charlotte, Everts, Rebecca Marie, Loot, Géraldine, Cucherousset, Julien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069303/
https://www.ncbi.nlm.nih.gov/pubmed/32185009
http://dx.doi.org/10.1002/ece3.6095
_version_ 1783505753897697280
author Lang, Iris
Evangelista, Charlotte
Everts, Rebecca Marie
Loot, Géraldine
Cucherousset, Julien
author_facet Lang, Iris
Evangelista, Charlotte
Everts, Rebecca Marie
Loot, Géraldine
Cucherousset, Julien
author_sort Lang, Iris
collection PubMed
description Although intraspecific variability is now widely recognized as affecting evolutionary and ecological processes, our knowledge on the importance of intraspecific variability within invasive species is still limited. This is despite the fact that understanding the linkage between within‐population morphological divergences and the use of different trophic or spatial resources (i.e., resource polymorphism) can help to better predict their ecological impacts on recipient ecosystems. Here, we quantified the extent of resource polymorphism within populations of a worldwide invasive crayfish species, Procambarus clarkii, in 16 lake populations by comparing their trophic (estimated using stable isotope analyses) and morphological characteristics between individuals from the littoral and pelagic habitats. Our results first demonstrated that crayfish occured in both littoral and pelagic habitats of seven lakes and that the use of pelagic habitat was associated with increased abundance of littoral crayfish. We then found morphological (i.e., body and chelae shapes) and trophic divergence (i.e., reliance on littoral carbon) among individuals from littoral and pelagic habitats, highlighting the existence of resource polymorphism in invasive populations. There was no genetic differentiation between individuals from the two habitats, implying that this resource polymorphism was stable (i.e., high gene flow between individuals). Finally, we demonstrated that a divergent adaptive process was responsible for the morphological divergence in body and chela shapes between habitats while difference in littoral reliance neutrally evolved under genetic drift. These findings demonstrated that invasive P. clarkii can display strong within‐population phenotypic variability in recent populations, and this could lead to contrasting ecological impacts between littoral and pelagic individuals.
format Online
Article
Text
id pubmed-7069303
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher John Wiley and Sons Inc.
record_format MEDLINE/PubMed
spelling pubmed-70693032020-03-17 Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish Lang, Iris Evangelista, Charlotte Everts, Rebecca Marie Loot, Géraldine Cucherousset, Julien Ecol Evol Original Research Although intraspecific variability is now widely recognized as affecting evolutionary and ecological processes, our knowledge on the importance of intraspecific variability within invasive species is still limited. This is despite the fact that understanding the linkage between within‐population morphological divergences and the use of different trophic or spatial resources (i.e., resource polymorphism) can help to better predict their ecological impacts on recipient ecosystems. Here, we quantified the extent of resource polymorphism within populations of a worldwide invasive crayfish species, Procambarus clarkii, in 16 lake populations by comparing their trophic (estimated using stable isotope analyses) and morphological characteristics between individuals from the littoral and pelagic habitats. Our results first demonstrated that crayfish occured in both littoral and pelagic habitats of seven lakes and that the use of pelagic habitat was associated with increased abundance of littoral crayfish. We then found morphological (i.e., body and chelae shapes) and trophic divergence (i.e., reliance on littoral carbon) among individuals from littoral and pelagic habitats, highlighting the existence of resource polymorphism in invasive populations. There was no genetic differentiation between individuals from the two habitats, implying that this resource polymorphism was stable (i.e., high gene flow between individuals). Finally, we demonstrated that a divergent adaptive process was responsible for the morphological divergence in body and chela shapes between habitats while difference in littoral reliance neutrally evolved under genetic drift. These findings demonstrated that invasive P. clarkii can display strong within‐population phenotypic variability in recent populations, and this could lead to contrasting ecological impacts between littoral and pelagic individuals. John Wiley and Sons Inc. 2020-02-14 /pmc/articles/PMC7069303/ /pubmed/32185009 http://dx.doi.org/10.1002/ece3.6095 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Lang, Iris
Evangelista, Charlotte
Everts, Rebecca Marie
Loot, Géraldine
Cucherousset, Julien
Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
title Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
title_full Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
title_fullStr Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
title_full_unstemmed Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
title_short Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
title_sort stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069303/
https://www.ncbi.nlm.nih.gov/pubmed/32185009
http://dx.doi.org/10.1002/ece3.6095
work_keys_str_mv AT langiris stableresourcepolymorphismalongthebenthiclittoralpelagicaxisinaninvasivecrayfish
AT evangelistacharlotte stableresourcepolymorphismalongthebenthiclittoralpelagicaxisinaninvasivecrayfish
AT evertsrebeccamarie stableresourcepolymorphismalongthebenthiclittoralpelagicaxisinaninvasivecrayfish
AT lootgeraldine stableresourcepolymorphismalongthebenthiclittoralpelagicaxisinaninvasivecrayfish
AT cucheroussetjulien stableresourcepolymorphismalongthebenthiclittoralpelagicaxisinaninvasivecrayfish