Functional Niche Partitioning Occurs over ...
Document type :
Article dans une revue scientifique: Article original
DOI :
PMID :
Title :
Functional Niche Partitioning Occurs over Body Size but Not Nutrient Reserves nor Melanism in a Polar Carabid Beetle along an Altitudinal Gradient
Author(s) :
Espel, Diane [Auteur]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Coux, Camille [Auteur]
Centre d’Ecologie Fonctionnelle et Evolutive [CEFE]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Pertierra, Luis R [Auteur]
University of Pretoria [South Africa]
Eymar-Dauphin, Pauline [Auteur]
Équipe 1 - Biodiversité et Adaptation dans les Hydrosystèmes [BAH]
Lembrechts, Jonas J. [Auteur]
University of Antwerp [UA]
Renault, D [Auteur]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Coux, Camille [Auteur]
Centre d’Ecologie Fonctionnelle et Evolutive [CEFE]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Pertierra, Luis R [Auteur]
University of Pretoria [South Africa]
Eymar-Dauphin, Pauline [Auteur]
Équipe 1 - Biodiversité et Adaptation dans les Hydrosystèmes [BAH]
Lembrechts, Jonas J. [Auteur]
University of Antwerp [UA]
Renault, D [Auteur]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Journal title :
INSECTS
Pages :
123
Publisher :
MDPI
Publication date :
2023-01-25
ISSN :
2075-4450
English keyword(s) :
Amblystogenium pacificum
Carabidae
French sub-Antarctic islands
dimorphism
functional diversity
melanism
thermal tolerance
Carabidae
French sub-Antarctic islands
dimorphism
functional diversity
melanism
thermal tolerance
HAL domain(s) :
Sciences de l'environnement/Biodiversité et Ecologie
English abstract : [en]
Phenotypic plasticity can favor the emergence of different morphotypes specialized in specific ranges of environmental conditions. The existence of intraspecific partitioning confers resilience at the species scale and can ...
Show more >Phenotypic plasticity can favor the emergence of different morphotypes specialized in specific ranges of environmental conditions. The existence of intraspecific partitioning confers resilience at the species scale and can ultimately determine species survival in a context of global changes. Amblystogenium pacificum is a carabid beetle endemic to the sub-Antarctic Crozet Islands, and it has two distinctive morphotypes based on body coloration. For this study, A. pacificum specimens of functional niches were sampled along an altitudinal gradient (as a proxy for temperature), and some morphological and biochemical traits were measured. We used an FAMD multivariate analysis and linear mixed-effects models to test whether these traits were related to morphotype, altitude, and sexual dimorphism. We then calculated and compared the functional niches at different altitudes and tested for niche partitioning through a hypervolume approach. We found a positive hump-shaped correlation between altitude and body size as well as higher protein and sugar reserves in females than in males. Our functional hypervolume results suggest that the main driver of niche partitioning along the altitudinal gradient is body size rather than morphotype or sex, even though darker morphotypes tended to be more functionally constrained at higher altitudes and females showed limited trait variations at the highest altitude.Show less >
Show more >Phenotypic plasticity can favor the emergence of different morphotypes specialized in specific ranges of environmental conditions. The existence of intraspecific partitioning confers resilience at the species scale and can ultimately determine species survival in a context of global changes. Amblystogenium pacificum is a carabid beetle endemic to the sub-Antarctic Crozet Islands, and it has two distinctive morphotypes based on body coloration. For this study, A. pacificum specimens of functional niches were sampled along an altitudinal gradient (as a proxy for temperature), and some morphological and biochemical traits were measured. We used an FAMD multivariate analysis and linear mixed-effects models to test whether these traits were related to morphotype, altitude, and sexual dimorphism. We then calculated and compared the functional niches at different altitudes and tested for niche partitioning through a hypervolume approach. We found a positive hump-shaped correlation between altitude and body size as well as higher protein and sugar reserves in females than in males. Our functional hypervolume results suggest that the main driver of niche partitioning along the altitudinal gradient is body size rather than morphotype or sex, even though darker morphotypes tended to be more functionally constrained at higher altitudes and females showed limited trait variations at the highest altitude.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :
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