Title :

Once upon a time in the far south: Influence of local drivers and functional traits on plant invasion in the harsh sub‐Antarctic islands

Author(s) :

Bazzichetto, Manuele [Auteur correspondant]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Massol, Francois [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Carboni, Marta [Auteur]
Università degli Studi Roma Tre = Roma Tre University [ROMA TRE]
Lenoir, Jonathan [Auteur]
Ecologie et Dynamique des Systèmes Anthropisés - UMR CNRS 7058 UPJV [EDYSAN]
Lembrechts, Jonas [Auteur]
University of Antwerp [UA]
Joly, Rémi [Auteur]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Renault, David [Auteur]
Ecosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
Institut universitaire de France [IUF]

Journal title :

Journal of Vegetation Science

Pages :

e13057

Publisher :

Wiley

Publication date :

2021-07

ISSN :

1100-9233

HAL domain(s) :

Sciences du Vivant [q-bio]/Biodiversité
Sciences du Vivant [q-bio]/Ecologie, Environnement
Sciences de l'environnement/Milieux et Changements globaux
Sciences de l'environnement/Biodiversité et Ecologie

English abstract : [en]

Aim. Here, we aim to: (a) investigate the local effect of environmental and anthropogenic factors on alien plant invasion in sub-Antarctic islands; and (b) explore whether and how functional traits affect alien species ...
Show more >Aim. Here, we aim to: (a) investigate the local effect of environmental and anthropogenic factors on alien plant invasion in sub-Antarctic islands; and (b) explore whether and how functional traits affect alien species dependence on anthropogenic factors in these environments. Location. Possession Island, Crozet archipelago (French sub-Antarctic islands). Methods. Single-species distribution models were used to explore the effect of high-resolution topoclimatic and human-related variables on the occurrence of six alien plants colonizing French sub-Antarctic islands. Furthermore, plant responses to human-related variables and the effect of those variables in interaction with plant traits were analysed by means of a multi-species distribution model. This allowed identifying functional features mediating the influence of human activities on the occurrence probability of alien plant species. Results. We observed two main invasion patterns: (a) species predicted to occur close to the introduction sites, whose occurrence probability appeared to be strongly affected by anthropogenic factors; and (b) species predicted to occur nearly everywhere on Possession Island, except in areas featuring particularly harsh climatic conditions. Differences in the influence of human-related variables on the occurrence of the alien species were mostly related to their life history, plant height and residence time, with perennial and low-statured species introduced earlier appearing less dependent on human-induced dispersal and disturbance. Conclusions. We conclude that both topoclimatic and anthropogenic factors affect plant invasion on sub-Antarctic islands. Specifically, species predicted to occur close to their introduction sites appear much more dependent on human presence and activity, potentially due to the lack of key functional traits allowing them to spread successfully across Possession Island under the harsh sub-Antarctic climate. Yet, particularly severe abiotic conditions are a major constraint which equally limits the occurrence of all alien plants, irrespective of their dependence on anthropogenic factors.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

ASsessing and mitigating the effects of climate change and biological Invasions on the spatial redistribution of biodiversity in Cold environmentS

Collections :

• Centre d'Infection et d'Immunité de Lille (CIIL) - U1019 - UMR 9017

Source :

Harvested from HAL