Agriculture and environmental change at Qingpu, Yangtze delta region, China: a biomarker, stable isotope and palynological approach

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dc.contributor.authorAtahan, Pen_AU
dc.contributor.authorGrice, Ken_AU
dc.contributor.authorDodson, JRen_AU
dc.date.accessioned2008-04-04T03:36:52Zen_AU
dc.date.accessioned2010-04-30T05:02:05Zen_AU
dc.date.available2008-04-04T03:36:52Zen_AU
dc.date.available2010-04-30T05:02:05Zen_AU
dc.date.issued2007-05en_AU
dc.date.statistics2007-05en_AU
dc.description.abstractRice (Oryza sp.) agriculture sustains vast numbers of people and, despite great advancements made in recent years, questions about its origins and spread throughout Asia remain unanswered. This study uses sedimentary biomarker, stable carbon isotope and palynological analyses to investigate early rice agriculture in the Yangtze delta, a region where rice agriculture emerged at least 7000 years ago. Accelerator mass spectrometer (AMS) C-14 dating reveals the age of sedimentary section to be between c. 6000 and 1800 cal. BP. Widespread clearing of forest vegetation c. 2400 cal. BP, is the earliest major human influence detected in the Qingpu record. Following this, rice agriculture probably dominated the Qingpu area. Evidence supporting rice agriculture after c. 2400cal. BP is provided by increased Poaceae and Cereal-type taxa, which occur with high concentrations of plant wax n-alkanes with a dominant C-3 plant origin (C-27-C-31 with odd/even preference, delta C-13 -29.8 parts per thousand to -36.3 parts per thousand). Also, high concentrations of a C-20 highly branched isoprenoid (HBI) thought to be from epiphytic algae associated with rice agriculture occur after c. 2400cal. BP. C-13-depleted diploptene (in high concentrations) and C-13-depleted C-31 3b-methylhopanes of methanotrophic bacterial origin also occur after c. 2400cal. BP. The strong methane cycle detected in the trench sediment may have provided an alternative CO2 source for plants and algae associated with rice agriculture. © 2007, SAGE Publicationsen_AU
dc.identifier.citationAtahan, P., Grice, K., & Dodson, J. (2007). Agriculture and environmental change at Qingpu, Yangtze delta region, China: a biomarker, stable isotope and palynological approach. Holocene, 17(4), 507-515. doi:10.1177/0959683607076451en_AU
dc.identifier.govdoc1127en_AU
dc.identifier.issn0959-6836en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleHoloceneen_AU
dc.identifier.pagination507-515en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1033en_AU
dc.identifier.urihttps://doi.org/10.1177/0959683607076451en_AU
dc.identifier.volume17en_AU
dc.language.isoenen_AU
dc.publisherSAGE Publicationsen_AU
dc.subjectAgricultureen_AU
dc.subjectChinaen_AU
dc.subjectYangtze Riveren_AU
dc.subjectRiceen_AU
dc.subjectAsiaen_AU
dc.subjectCarbon isotopesen_AU
dc.subjectMass spectrometersen_AU
dc.subjectPlantsen_AU
dc.titleAgriculture and environmental change at Qingpu, Yangtze delta region, China: a biomarker, stable isotope and palynological approachen_AU
dc.typeJournal Articleen_AU
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