@article{fdi:010073639, title = {{N}onlinear relationship between biodiversity and human population density : evidence from {S}outheast {A}sia}, author = {{P}aradis, {E}mmanuel}, editor = {}, language = {{ENG}}, abstract = {{T}he geographical distribution of terrestrial vertebrate biodiversity was assessed in {S}outheast {A}sia, an area characterized by highly heterogeneous human population densities ({HPD}s). {W}e tested the hypothesis that recent (between 1990 and 2000) population increases may result in increased threats to biodiversity. {GIS} data were compiled from the {I}nternational {U}nion for the {C}onservation of {N}ature, {B}ird{L}ife, and the {S}ocioeconomic {D}ata and {A}pplications {C}enter. {P}olygon data sets were transformed into rasters with different resolutions from 2.5 to 1 {R}elationships between species diversity were assessed globally and separately for terrestrial vertebrates (mammals, birds, reptiles, and amphibians) and for five countries ({C}ambodia, {L}aos, {M}yanmar, {T}hailand, and {V}ietnam). {T}he number of species within a 20 km-cell varied greatly and reached a maximum of 801. {T}he species-rich cells ( species) were located in a single, almost continuous area across {M}yanmar, {T}hailand, {V}ietnam, and {S}outh {C}hina. {T}he relationship between vertebrate biodiversity and population density showed that biodiversity increased with {HPD} until around 10 persons km then decreased until around 200 persons km where it stabilized. {T}his relationship was mediated by land cover and protection status with significant interactions between these variables and with population density. {T}he areas with moderately increasing populations between 1990 and 2000 were those with the highest overall diversity (median 607) whereas those with decreasing populations were those with the lowest diversity (median 479). {O}ur results suggest that population pressure on biodiversity has increased between 1990 and 2000 and this is a relatively widespread phenomenon. {T}he presence of a continuous area of high vertebrate biodiversity calls for international action at a regional scale involving {C}hina, {L}aos, {M}yanmar, {T}hailand, and {V}ietnam.}, keywords = {{C}onservation ; {GIS} ; {S}outheast {A}sia ; {T}hreats ; {V}ertebrates ; {CHINE} ; {CAMBODGE} ; {LAOS} ; {MYANMAR} ; {THAILANDE} ; {VIET} {NAM}}, booktitle = {}, journal = {{B}iodiversity and {C}onservation}, volume = {27}, numero = {10}, pages = {2699--2712}, ISSN = {0960-3115}, year = {2018}, DOI = {10.1007/s10531-018-1563-5}, URL = {https://www.documentation.ird.fr/hor/fdi:010073639}, }