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| 锟斤拷锟斤化石锟桔硷拷锟斤拷示锟叫癸拷锟斤拷锟斤拷农业 |
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弄锟斤拷全锟斤拷锟界不同锟斤拷锟斤拷锟斤拷农业锟斤拷源一直锟角匡拷锟斤拷学锟斤拷锟斤拷锟劫碉拷一锟斤拷锟斤拷战锟斤拷锟斤拷锟斤拷芯锟斤拷锟皆憋拷凇锟斤拷锟斤拷锟斤拷锟窖г涸猴拷锟斤拷锟斤拷锟�PNAS锟斤拷锟较憋拷锟斤拷说锟斤拷锟斤拷锟角凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节讹拷锟角斤拷锟叫癸拷锟斤拷锟斤拷锟斤拷实锟斤拷锟街わ拷荨锟斤拷锟斤拷谴锟揭伙拷锟斤拷锟斤拷锟饺ワ拷锟教拷锟斤拷艿锟斤拷锟皆达拷锟斤拷占锟斤拷锟斤拷锟揭伙拷锟较�——锟斤拷锟斤拷锟斤拷锟侥癸拷锟斤拷锟斤拷
锟斤拷些锟斤拷锟斤拷锟斤拷锟侥癸拷锟斤拷锟皆硷拷锟斤拷锟叫撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷墓锟斤拷锟斤拷锟斤拷锟斤拷泄锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟轿拷嵌锟斤拷锟脚┮碉拷锟揭伙拷锟斤拷锟斤拷艿锟斤拷锟斤拷锟斤拷锟斤拷摹锟斤拷锟斤拷锟斤拷锟斤拷系暮锟斤拷锟斤拷幕锟窖э拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟绞筹拷懈锟斤拷锟斤拷冢锟斤拷锟斤拷锟揭伙拷锟揭帮拷锟斤拷锟斤拷锟教拷锟斤拷艹缘煤芏锟侥癸拷锟斤，锟斤拷锟斤拷锟斤拷锟斤拷锟叫癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷农业锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷“锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫达拷锟斤拷冢锟斤拷锟斤拷堑锟斤拷锟斤拷锟斤拷锟斤拷撕芸锟斤拷锟揭惨伙拷锟斤拷锟�”锟斤拷锟叫撅拷锟斤拷锟斤拷锟斤拷之一锟斤拷锟斤拷锟节伙拷锟叫撅拷院锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷锟揭的诧拷士锟斤拷锟叫撅拷员Seth Newsome说锟斤拷锟斤拷些锟斤拷学锟斤拷锟斤拷锟斤拷锟节革拷实锟斤拷锟揭斤拷锟叫的★拷
锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟叫癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷原锟侥达拷锟斤拷锟斤拷锟绞拷锟绞憋拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷泄锟斤拷锟斤拷锟窖э拷锟斤拷锟�20锟斤拷锟斤拷70锟斤拷锟侥╋拷锟�80锟斤拷锟斤拷锟斤拷锟斤拷锟侥ｏ拷2006锟斤拷锟斤拷锟皆硷拷锟捷达拷学锟斤拷维斯锟斤拷校锟斤拷锟叫癸拷锟斤拷锟捷达拷学锟斤拷一锟斤拷锟脚讹拷也锟斤拷锟斤拷锟斤拷锟斤拷锟剿凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷木锟阶★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟绞憋拷冢锟斤拷锟�7900锟斤拷前锟斤拷7200锟斤拷前锟斤拷1锟节ｏ拷锟酵达拷6500锟斤拷前锟斤拷4900锟斤拷前锟斤拷2锟节ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟叫讹拷锟斤拷锟斤拷锟斤拷锟节碉拷植锟斤拷锟揭恍╋拷锟绞拷锟斤拷锟叫╋拷锟绞拷锟斤拷锟斤拷锟街憋拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟绞筹拷锟斤拷锟秸硷拷硕锟斤拷佟锟�
为锟剿斤拷锟斤拷锟斤拷锟斤拷锟解，锟斤拷锟斤拷锟窖э拷锟斤拷锟斤拷锟斤拷锟揭伙拷殖锟轿拷榷锟酵伙拷胤锟斤拷锟斤拷募锟斤拷锟斤拷锟教硷拷锟皆拷氐锟皆拷锟斤拷胁锟酵拷锟斤拷锟绞斤拷锟酵伙拷兀锟斤拷锟斤拷锟斤拷堑幕锟窖э拷锟斤拷锟斤拷锟斤拷疲锟斤拷锟斤拷强锟斤拷锟斤拷锟绞碉拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷堑锟斤拷锟斤拷锟斤拷锟轿⑿★拷锟斤拷锟斤拷锟斤拷锟金开★拷一些C4植锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷C3 植锟斤集锟叫革拷锟斤拷锟斤拷氐锟教纪伙拷亍锟斤拷锟绞筹拷锟斤拷泻芏锟紺4植锟斤拷亩锟斤拷锟揭诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷堑墓锟斤拷锟斤拷屑锟斤拷懈锟斤拷锟斤拷锟截碉拷碳同位锟截★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷泄锟斤拷珊锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷 C4植锟斤拷之一锟斤拷锟斤拷锟矫癸拷锟斤拷锟叫碉拷碳同位锟截筹拷为锟剿革拷锟斤拷锟斤拷食锟斤拷一锟斤拷锟杰好碉拷指锟疥。
锟斤拷锟斤拷锟窖э拷曳锟斤拷锟斤拷锟斤拷锟�1锟节筹拷锟斤拷锟斤拷拇锟斤拷锟斤拷锟斤拷锟侥癸拷锟斤拷锟斤拷锟叫革拷锟斤拷锟斤拷食锟斤拷同位锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷些锟斤拷锟角憋拷驯锟斤拷锟侥ｏ拷锟斤拷锟揭憋拷锟秸伙拷锟节碉拷锟斤拷锟斤拷喂锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟轿拷锟酵拷墓锟斤拷隆锟斤拷锟�1锟节筹拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷没锟斤拷锟斤拷示锟斤拷锟斤拷食锟斤拷锟斤拷锟节的硷拷锟斤拷锟斤拷锟斤拷锟斤拷呛芸锟斤拷锟斤拷潜锟斤拷锟斤拷嗖讹拷锟绞筹拷玫锟揭帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�2锟节筹拷锟斤拷锟斤拷锟叫碉拷锟斤拷锟斤拷锟斤拷确实锟斤拷锟斤拷锟节碉拷同位锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷呛芸锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟节憋拷驯锟斤拷锟侥★拷
“锟斤拷锟角的斤拷锟斤拷锟斤拷锟斤拷锟斤拷畈古┮碉拷锟斤拷锟节该碉拷锟斤拷锟斤拷锟斤拷锟酵硷拷锟斤拷锟�”Newsome说锟斤拷“锟斤拷锟斤拷锟狡诧拷农业锟斤拷锟较凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟津北达拷锟斤拷锟斤拷锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷锟街凤拷模锟�1锟斤拷锟斤拷锟斤拷芸锟斤拷锟酵拷锟斤拷锟斤拷嗟憋拷毓锟斤拷锟接讹拷锟斤拷锟斤拷农业实锟介。锟斤拷锟街简单碉拷锟斤拷系锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街凤拷模锟�2锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷锟斤拷锟斤拷拥锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟脚┮碉拷锟较碉拷锟�”锟斤拷锟斤拷源锟斤拷EurekAlert! 锟斤拷锟侥版）
锟斤拷锟斤拷锟斤拷锟揭匡拷学院院锟斤拷锟斤拷锟斤拷
PNAS锟斤拷锟斤拷doi: 10.1073/pnas.0809960106 锟斤拷Loukas Barton锟斤拷 Robert L. Bettinger锟斤拷
