@article{fdi:010060602, title = {{T}he exotic legume tree species, {A}cacia mearnsii, alters microbial soil functionalities and the early development of a native tree species, {Q}uercus suber, in {N}orth {A}frica}, author = {{B}oudiaf, {I}. and {B}audoin, {E}z{\'e}kiel and {S}anguin, {H}. and {B}eddiar, {A}. and {T}hioulouse, {J}. and {G}aliana, {A}. and {P}rin, {Y}. and {L}e {R}oux, {C}. and {L}ebrun, {M}ichel and {D}uponnois, {R}obin}, editor = {}, language = {{ENG}}, abstract = {{A}cacia mearnsii is one of the most planted {A}ustralian {A}cacia around the world but is known to be highly invasive, threatening native habitats by competing with indigenous vegetation. {T}he introduction of this species in the {A}lgerian {E}l {K}ala {B}iosphere reserve led to the invasion of natural formations to the detriment of {Q}uercus suber, a native tree species. {W}e hypothesized that shifts in soil microbial functions and ectomycorrhizal ({E}c{M}) fungal community structure triggered by this exotic {A}cacia species might correlate with a decrease of the early growth of {Q} suber. {S}oil samples were thus collected from 3 different sites where the exotic species was at different stages of invasion in the {A}lgerian {E}l {K}ala {B}iosphere reserve, (i) a {Q} suber forest free of {A}. mearnsii (site {S}1), (ii) a {Q} suber/{A}. mearnsii mixed forest where the {A}ustralian {A}cacia has been recently detected (site {S}2) and (iii) pure stands of {A}. mearnsii formed more than 20 years ago (site {S}3). {P}lant growth, {E}c{M} community structure associated with {Q}. suber roots and soil microbial functionalities were assessed for 6 month-old cultures of {Q} suber in glasshouse conditions. {T}he results clearly demonstrated a strong deleterious impact of {A}. mearnsii invasion level on soil chemical characteristics, microbial functions and {E}c{M} community structure and colonization, correlated to a decrease in the early growth of {Q} suber seedlings. {T}he current study gives new insights into both the negative impact of exotic species on soil functioning and their effect on indigenous vegetation growth. {T}hese results may be used as a basis for improving the conservation practices of native tree species in such degraded areas as a complement of ecological strategies using indigenous ectotrophic early-successional shrub species (eg. {C}istus spp.) that our findings have shown to promote {E}c{M} multiplication and the early growth of native tree species.}, keywords = {{E}xotic invasive plant ; {A}cacia mearnsii ; {S}oil microbial community ; {E}ctomycorrhiza ; {ALGERIE}}, booktitle = {}, journal = {{S}oil {B}iology and {B}iochemistry}, volume = {65}, numero = {}, pages = {172--179}, ISSN = {0038-0717}, year = {2013}, DOI = {10.1016/j.soilbio.2013.05.003}, URL = {https://www.documentation.ird.fr/hor/fdi:010060602}, }