@article{fdi:010091055, title = {{S}easonal dynamics of {M}editerranean fish communities revealed by e{DNA} : {C}ontrasting compositions across depths and {M}arine {F}ully {P}rotected {A}rea boundaries}, author = {{R}ozanski, {R}. and {V}elez, {L}. and {H}ocd{\'e}, {R}{\'e}gis and {D}uhamet, {A}. and {W}aldock, {C}. and {M}ouillot, {D}. and {P}ellissier, {L}. and {A}lbouy, {C}.}, editor = {}, language = {{ENG}}, abstract = {{M}arine fish communities suffer from anthropogenic pressures and climate change, which influence their spatiotemporal dynamics. {M}arine {P}rotected {A}reas ({MPA}s) have been established worldwide to preserve these communities, while mesophotic ecosystems could provide natural refugia. {A}ssessing the extent to which {MPA}s and deeper ecosystems can mitigate human and climate change impacts requires regular monitoring of temporal community dynamics. {E}nvironmental {DNA} (e{DNA}) surveys - being time- and cost-effective - can provide valuable insights on biodiversity change. {H}ere, we initiated a long-term study based on e{DNA} monitoring in an {MPA} in the north-western {M}editerranean {S}ea that includes areas with various protection levels. {S}pecifically, from {J}une 2021 to {J}anuary 2023, we collected e{DNA} samples during the summer, fall, and winter seasons from shallow water (20 m depth), at 40 m depth, and from the mesophotic zone (80 m depth) in a {F}ully {P}rotected {A}rea ({FPA}) and in a nearby {L}ightly {P}rotected {A}rea ({LPA}) in the {R}iou archipelago ({F}rance). {I}n this short period and relatively small area, we detected a total of 113 actinopterygian and chondrichthyan taxa. {S}pecies with high fishing vulnerability had higher detection rates in the {FPA} than in the {LPA}, suggesting a positive impact of {FPA}s on the conservation of these threatened species. {A} marked seasonal signal in species detections, including significantly lower detections of several species in winter, indicated a combined effect of species biological changes and migration behavior. {T}he seasonality trend was stronger in the {FPA} than in the {LPA}, indicating that such areas may modify sub-yearly patterns in communities and ecosystem processes. {F}ish composition was associated with water depth, with marked species dissimilarities between shallow waters and the mesophotic zone, implying that multiple depths should be considered in {MPA} monitoring to fully capture the response of biodiversity to management. {O}ur results point to the importance of temporal information combined with extensive sampling across depths and protection levels to fully understand the ecological dynamics and structure of coastal fish communities.}, keywords = {{D}epth ; {F}ish ; {F}ully {P}rotected {A}rea ; {L}ightly {P}rotected {A}rea ; {M}editerranean {S}ea ; {MPA} ; {S}eason ; {T}eleo ; {MEDITERRANEE} ; {FRANCE}}, booktitle = {}, journal = {{E}cological {I}ndicators}, volume = {166}, numero = {}, pages = {112290 [13 p.]}, ISSN = {1470-160{X}}, year = {2024}, DOI = {10.1016/j.ecolind.2024.112290}, URL = {https://www.documentation.ird.fr/hor/fdi:010091055}, }