<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Tallavaara, Miikka</style></author><author><style face="normal" font="default" size="100%">Eronen, Jussi T.</style></author><author><style face="normal" font="default" size="100%">Luoto, Miska</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Productivity, biodiversity, and pathogens influence the global hunter-gatherer population density</style></title><secondary-title><style face="normal" font="default" size="100%">PNAS</style></secondary-title><short-title><style face="normal" font="default" size="100%">Proceedings of the National Academy of Sciences</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2017/12/27</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.pnas.org/content/early/2017/12/26/1715638115.full</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(51, 51, 51); font-family: Arial, sans-serif; font-size: 14px; text-align: justify;&quot;&gt;The environmental drivers of species distributions and abundances are at the core of ecological research. However, the effects of these drivers on human abundance are not well-known. Here, we report how net primary productivity, biodiversity, and pathogen stress affect human population density using global ethnographic hunter-gatherer data. Our results show that productivity has significant effects on population density globally. The most important direct drivers, however, depend on environmental conditions: biodiversity influences population density exclusively in low-productivity regions, whereas pathogen stress does so in high-productivity regions. Our results also indicate that subtropical and temperate forest biomes provide the highest carrying capacity for hunter-gatherer populations. These findings document that environmental factors play a key role in shaping global population density patterns of preagricultural humans.&lt;/span&gt;&lt;/p&gt;
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