@article{fdi:010066925,
  title = {{A} network-based method to detect patterns of local crop biodiversity : validation at the species and infra-species levels},
  author = {{T}homas, {M}. and {V}erzelen, {N}. and {B}arbillon, {P}. and {C}oomes, {O}. {T}. and {C}aillon, {S}. and {M}c{K}ey, {D}. and {E}lias, {M}. and {G}arine, {E}. and {R}aimond, {C}. and {D}ounias, {E}dmond and {J}arvis, {D}. and {W}encelius, {J}. and {L}eclerc, {C}. and {L}abeyrie, {V}. and {C}uong, {P}. {H}. and {H}ue, {N}. {T}. {N}. and {S}thapit, {B}. and {R}ana, {R}. {B}. and {B}arnaud, {A}deline and {V}iolon, {C}. and {R}eyes, {L}. {M}. {A}. and {M}oreno, {L}. {L}. and {D}e {S}antis, {P}. and {M}assol, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n this chapter, we develop new indicators and statistical tests to characterize patterns of crop diversity at local scales to better understand interactions between ecological and socio-cultural functions of agroecosystems. {F}arms, where a large number of crops (species or landraces) is grown, are known to contribute a large part of the locally available diversity of both rare and common crops but the role of farms with low diversity remains little understood: do they grow only common varieties-following a nestedness pattern typical of mutualistic networks in ecology-or do 'crop-poor' farmers also grow rare varieties? {T}his question is pivotal in ongoing efforts to assess the local-scale contribution of small farms to global agrobiodiversity. {W}e develop new network-based approaches to characterize the distribution of local crop diversity (species and infra-species) at the village level and to validate these approaches using meta-datasets from 10 countries. {O}ur results highlight the sources of heterogeneity in crop diversity at the village level. {W}e often identify two or more groups of farms based on their different levels of diversity. {I}n some datasets, 'crop-poor' farms significantly contribute to the local crop diversity. {G}enerally, we find that the distribution of crop diversity is more heterogeneous at the species than at the infra-species level. {T}his analysis reveals the absence of a general pattern of crop diversity distribution, suggesting strong dependence on local agroecological and socio-cultural contexts. {T}hese different patterns of crop diversity distribution reflect an heterogeneity in farmers' self-organized action in cultivating and maintaining local crop diversity, which ensures the adaptability of agroecosystems to global change.},
  keywords = {{PRESENCE}-{ABSENCE} {MATRICES} ; {NATURAL} {PEST}-{CONTROL} ; {IN}-{HOME} {GARDENS} ; {AGRICULTURAL} {BIODIVERSITY} ; {MUTUALISTIC} {NETWORKS} ; {MANIHOT}-{ESCULENTA} ; {GENETIC}-{RESOURCES} ; {ON}-{FARM} {DIVERSITY} {SYSTEMS} ; {KENYA} ; {CAMEROUN} ; {PEROU} ; {VANUATU} ; {EQUATEUR} ; {NEPAL} ; {VIET} {NAM} ; {MEXIQUE} ; {HONGRIE} ; {GUYANA}},
  booktitle = {{E}cosystem services : from biodiversity to society. {P}art 1},
  journal = {},
  volume = {53},
  numero = {},
  pages = {259--320},
  year = {2015},
  DOI = {10.1016/bs.aecr.2015.10.002},
  ISBN = {978-0-12-803885-7},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066925},
}