@article{fdi:010094638, title = {{I}nfluence of habitat fragmentation and habitat amount on soil fungi communities in ancient forests}, author = {{R}aimbault, {A}. and {B}rin, {A}. and {M}anzi, {S}. and {S}avoie, {J}.{M}. and {G}andois, {L}. and {O}liva, {P}. and {F}ogliani, {O}. and {R}oy-{C}amille, {C}. and {G}ratacap, {L}. and {R}oy, {M}{\'e}lanie}, editor = {}, language = {{ENG}}, abstract = {{C}ontext : {F}ungi represent a large part of soil biodiversity as well as an essential role for tree hydromineral nutrition, survival, and carbon cycling. {W}hile their local diversity has proven to be shaped by abiotic and biotic factors related to soil, climate and vegetation, their response to landscape fragmentation is still debated.{O}bjectives : {I}n this paper, we focus on ancient forests characterized by the presence of beech at low elevation, a habitat particularly fragmented in {S}outh-{W}est {F}rance. {W}e aim to assess the effect of past and present forest fragmentation and quantity on soil fungal and functional group diversity. {W}e expect a negative impact of fragmentation and a positive effect of forest quantity on soil fungal diversity, in addition to an influence of local soil factors.{M}ethods : {S}oils from 41 1ha ancient forest plots across {S}outh-{W}est {F}rance were sampled along gradients of past and present forest fragmentation and quantity, before their fungal diversity was characterized by metabarcoding of environmental {DNA}. {H}ill numbers have been computed and applied to all fungi, trophic guilds and growth forms.{R}esults : {W}e find that past forest fragmentation negatively impacts on soil fungal diversity and in particular for symbiotrophs, while the present forest quantity has a positive impact. {I}n contrast, the species richness of pathotrophic fungi shows a negative correlation with past forest fragmentation. {T}he diversity of fungal groups with lower dispersal abilities (e.g., corticioid, microfungi) is negatively impacted by past forest fragmentation, while the diversity of wind-dispersed fungi (e.g., agaricoid) is not influenced by any landscape descriptors.{C}onclusions : {O}ur results show the complexity of fungal responses to past and present forest fragmentation and demonstrate the long-lasting effect of past fragmentation as well as the positive impact of recent forest quantity in the landscape on fungal diversity associated with ancient forest soils. {O}ur study also highlights the huge diversity of fungi unraveled by e{DNA} metabarcoding in this habitat and the potential of such techniques to study the landscape ecology of soil communities.}, keywords = {}, booktitle = {}, journal = {{L}andscape {E}cology}, volume = {39}, numero = {2}, pages = {19 [16 ]}, ISSN = {1572-9761}, year = {2024}, DOI = {10.1007/s10980-024-01821-3}, URL = {https://www.documentation.ird.fr/hor/fdi:010094638}, }