@article{fdi:010083140, title = {{A}n innovative approach combining metabarcoding and ecological interaction networks for selecting candidate biological control agents}, author = {{O}llivier, {M}. and {L}esieur, {V}. and {T}avoillot, {J}ohannes and {B}enetiere, {F}. and {T}ixier, {M}. {S}. and {M}artin, {J}. {F}.}, editor = {}, language = {{ENG}}, abstract = {{C}lassical biological control ({CBC}) can be used to decrease the density of invasive species to below an acceptable ecological and economic threshold. {N}atural enemies specific to the invasive species are selected from its native range and released into the invaded range. {T}his approach has drawbacks, despite the performance of specificity tests to ensure its safety, because the fundamental host range defined under controlled conditions does not represent the actual host range in natura, and these tests omit indirect interactions within community. {W}e focus on {S}onchus oleraceus ({A}steraceae), a weed species originating from {W}estern {P}alearctic that is invasive in many countries and notably in {A}ustralia. {W}e explore how analyses of interaction network within its native range can be used to (a) inventory herbivores associated to the target plant, (b) characterize their ecological host ranges and (c) guide the selection of candidate biocontrol agents considering interactions with species from higher trophic levels. {A}rthropods were collected from plant community sympatric to {S}. oleraceus, in three bioclimatic regions, and interactions were inferred by a combination of molecular and morphological approaches. {T}he networks reconstructed were structured in several trophic levels from basal species (plant community), to intermediate and top species (herbivorous arthropods and their natural enemies). {T}he sub-network centred on {S}. oleraceus-related interactions contained 116 taxa and 213 interactions. {W}e identified 47 herbivores feeding on {S}. oleraceus, 15 of which were specific to the target species. {S}ome discrepancies with respect to published findings or conventional specificity tests suggested possible insufficient sampling effort for the recording of interactions or the existence of cryptic species. {A}mong potential candidate agents, six exhibited interactions with natural enemies. {S}ynthesis and applications. {A}dopting a network approach as prerequisite step of the classical biological control programme can provide a rapid screening of potential agents to be tested in priority. {O}nce ecological host range defined, we suggest that priority should be given to agent used by a minimum species, and, when they exist, to agents that possess enemies from the most distant taxonomical group from those occurring in the range of introduction.}, keywords = {common sowthistle ; food web ; high-throughput sequencing ; host ; specificity ; importation biological control ; non-target impacts ; risk ; prediction ; weed biocontrol ; {AUSTRALIE} ; {FRANCE}}, booktitle = {}, journal = {{J}ournal of {A}pplied {E}cology}, volume = {58}, numero = {12}, pages = {2866--2880}, ISSN = {0021-8901}, year = {2021}, DOI = {10.1111/1365-2664.14016}, URL = {https://www.documentation.ird.fr/hor/fdi:010083140}, }