@article{fdi:010069272, title = {{T}rait structure reveals the processes underlying fish establishment in the {M}editerranean}, author = {{G}ivan, {O}. and {P}arravicini, {V}. and {K}ulbicki, {M}ichel and {B}elmaker, {J}.}, editor = {}, language = {{ENG}}, abstract = {{A}im{T}ypically, non-indigenous species have been studied in relation to either the invaded (recipient) community or the donor community. {H}owever, we still lack a broad understanding of the mechanisms underlying the establishment of non-indigenous species that combines both perspectives. {S}ince the opening of the {S}uez {C}anal, hundreds of species have invaded the {M}editerranean from the {R}ed {S}ea, forming a unique system in which the entire species pool (donor, non-indigenous and recipient) is known. {F}ocusing on species ecological traits, we assess the drivers underlying the establishment of non-indigenous species from the onset of the invasion to the present. {L}ocation{T}he {M}editerranean and {R}ed {S}eas. {M}ethods{W}e compiled traits for shallow-water hard-bottom-associated fishes in the {M}editerranean (recipient community) and the {R}ed {S}ea (donor community). {W}e compared the multivariate community trait structure of non-indigenous species with the donor and recipient assemblages, using a novel method to objectively assign trait-weights, thereby increasing the robustness of the results. {P}atterns were contrasted with two types of null models which provide distinct insights into the ecological processes. {R}esults{N}on-indigenous fishes are very diverse ecologically, substantially increasing the total community trait diversity of the {M}editerranean. {T}rait similarity between non-indigenous and indigenous {M}editerranean species was lower than expected, indicating that non-indigenous fishes tend to occupy relatively vacant niches within the {M}editerranean. {H}owever, we further found that over time non-indigenous species display increased trait similarity to indigenous {M}editerranean species. {T}his suggests that trait constraints associated with successful establishment are weakening. {M}ain conclusions{N}on-indigenous species establish in relatively vacant ecological niches, opening the possibility for predicting establishment using ecological traits. {H}owever, the weakening of trait constraints through time suggests that forecasting future establishment may be difficult. {F}aced with an accelerating pace of invasion, it appears that the {M}editerranean is going to be transformed into an extension of the {R}ed {S}ea in terms of trait and species composition.}, keywords = {{B}iotic interactions ; biotic resistance ; community ecology ; ecological traits ; fish ; functional ecology ; invasional meltdown ; invasion ecology ; {M}editerranean ; {MEDITERRANEE}}, booktitle = {}, journal = {{G}lobal {E}cology and {B}iogeography}, volume = {26}, numero = {2}, pages = {142--153}, ISSN = {1466-822{X}}, year = {2017}, DOI = {10.1111/geb.12523}, URL = {https://www.documentation.ird.fr/hor/fdi:010069272}, }