TY - JOUR A1 - Zhang, Chengjun A1 - Zhang, Wanyi A1 - Feng, Zhaodong A1 - Mischke, Steffen A1 - Gao, Xiang A1 - Gao, Dou A1 - Sun, Feifei T1 - Holocene hydrological and climatic change on the northern Mongolian Plateau based on multi-proxy records from Lake Gun Nuur JF - Palaeogeography, palaeoclimatology, palaeoecology : an international journal for the geo-sciences N2 - A multi-proxy study including analyses of delta C-13(org) for the lake sediment core GN-02 and grain size, TOC. CaCO3 content, delta C-13(carb) and delta O-18(carb) of bulk carbonate, and the mineralogy of the parallel core GN-04 from Gun Nuur was performed to reconstruct the Holocene hydrology and climate on the northern Mongolian Plateau. The chronology was established using 40 C-14 dates of bulk organic matter in addition to nine previously published radiocarbon dates for core GN-02, and further five C-14 dates for the new core GN-04. A lake reservoir effect of 1060 C-14 years was determined as the intercept of the high-resolution GN-02 age-depth model at the modern sediment surface. The size of the reservoir effect is supported by the age of the core-top sample (1200 +/- 40 C-14 years) and the determined difference between a wood-derived radiocarbon age from the GN-02 core base and the age-model inferred age for bulk organic matter at the same stratigraphic level (1000 C-14 years). Low lake level and prevailing aeolian sediment deposition at Gun Nuur under dry conditions were recorded during the earliest Holocene (> 10,800-10,300 cal a BP). Gun Nuur expanded under significantly wetter conditions between 10,300 and 7000 cal a BP. Unstable climate conditions existed in the mid Holocene (7000-2500 cal a BP) and three periods of low lake-levels and significantly drier conditions were recorded between 7000-5700, 4100-3600 and 3000-2500 cal a BP. Intermediate lake levels were inferred for the intervening periods. Around 2500 cal a BP, the climate change and wetter conditions were established again. As a consequence, the lake level of Gun Nuur rose again due to higher effective moisture and the relatively wet present conditions were achieved ca. 1600 cal a BP. Our results suggest that the initial Holocene climate change on the northern Mongolian Plateau was not accompanied by a rapid increase in precipitation as on the Tibetan Plateau. The establishment of wetter conditions in northern Mongolia lagged behind the early Holocene moisture increase on the Tibetan Plateau by ca. 1000 years. Subsiding dry air in the north of the Tibetan Plateau resulted from the strengthened summer monsoon on the Tibetan Plateau during the period of maximum summer insolation and probably inhibited a significant precipitation increase in Mongolia. The significant moisture increase in the Gun Nuur region at ca. 10.3 cal ka BP is probably not related to the northward shift of the present summer monsoon boundary or the moisture delivery from the northern Atlantic through the westerlies. Instead, water from melting snow, ice and frozen ground and the generation of precipitation from the local recycling of moisture are discussed as possible moisture source for the early onset of wetter conditions on the Mongolian Plateau. KW - Multi-proxy record KW - Sediment geochemistry KW - Mineralogy KW - Paleohydrology KW - Holocene KW - Mongolia Y1 - 2012 U6 - https://doi.org/10.1016/j.palaeo.2012.01.032 SN - 0031-0182 VL - 323 IS - 6 SP - 75 EP - 86 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Xiang, Hai A1 - Gao, Jianqiang A1 - Cai, Dawei A1 - Luo, Yunbing A1 - Yu, Baoquan A1 - Liu, Langqing A1 - Liu, Ranran A1 - Zhou, Hui A1 - Chen, Xiaoyong A1 - Dun, Weitao A1 - Wang, Xi A1 - Hofreiter, Michael A1 - Zhao, Xingbo T1 - Origin and dispersal of early domestic pigs in northern China JF - Scientific reports N2 - It is widely accepted that modern pigs were domesticated independently at least twice, and Chinese native pigs are deemed as direct descendants of the first domesticated pigs in the corresponding domestication centers. By analyzing mitochondrial DNA sequences of an extensive sample set spanning 10,000 years, we find that the earliest pigs from the middle Yellow River region already carried the maternal lineages that are dominant in both younger archaeological populations and modern Chinese pigs. Our data set also supports early Neolithic pig utilization and a long-term in situ origin for northeastern Chinese pigs during 8,000-3,500 BP, suggesting a possibly independent domestication in northeast China. Additionally, we observe a genetic replacement in ancient northeast Chinese pigs since 3,500 BP. The results not only provide increasing evidence for pig origin in the middle Yellow River region but also depict an outline for the process of early pig domestication in northeast China. Y1 - 2017 U6 - https://doi.org/10.1038/s41598-017-06056-8 SN - 2045-2322 VL - 7 PB - Nature Publ. Group CY - London ER - TY - GEN A1 - Xiang, Hai A1 - Gao, Jianqiang A1 - Yu, Baoquan A1 - Hofreiter, Michael A1 - Zhao, Xingbo T1 - Reply to Peters et al.: Further discussions confirm early Holocene chicken domestication in northern China T2 - Proceedings of the National Academy of Sciences of the United States of America Y1 - 2015 U6 - https://doi.org/10.1073/pnas.1503956112 SN - 0027-8424 VL - 112 IS - 19 SP - E2416 EP - E2416 PB - National Acad. of Sciences CY - Washington ER - TY - JOUR A1 - Xiang, Hai A1 - Gao, Jianqiang A1 - Yu, Baoquan A1 - Zhou, Hui A1 - Cai, Dawei A1 - Zhang, Youwen A1 - Chen, Xiaoyong A1 - Wang, Xi A1 - Hofreiter, Michael A1 - Zhao, Xingbo T1 - Early Holocene chicken domestication in northern China JF - Proceedings of the National Academy of Sciences of the United States of America N2 - Chickens represent by far the most important poultry species, yet the number, locations, and timings of their domestication have remained controversial for more than a century. Here we report ancient mitochondrial DNA sequences from the earliest archaeological chicken bones from China, dating back to similar to 10,000 B.P. The results clearly show that all investigated bones, including the oldest from the Nanzhuangtou site, are derived from the genus Gallus, rather than any other related genus, such as Phasianus. Our analyses also suggest that northern China represents one region of the earliest chicken domestication, possibly dating as early as 10,000 y B.P. Similar to the evidence from pig domestication, our results suggest that these early domesticated chickens contributed to the gene pool of modern chicken populations. Moreover, our results support the idea that multiple members of the genus Gallus, specifically Gallus gallus and Gallus sonneratii contributed to the gene pool of the modern domestic chicken. Our results provide further support for the growing evidence of an early mixed agricultural complex in northern China. KW - ancient DNA KW - chicken KW - domestication KW - species origin Y1 - 2014 U6 - https://doi.org/10.1073/pnas.1411882111 SN - 0027-8424 VL - 111 IS - 49 SP - 17564 EP - 17569 PB - National Acad. of Sciences CY - Washington ER - TY - JOUR A1 - Li, Wen-Dong A1 - Fay, Doris A1 - Frese, Michael A1 - Harms, Peter D. A1 - Gao, Xiang Yu T1 - Reciprocal relationship between proactive personality and work characteristics: A latent change score approach JF - Journal of applied psychology N2 - Previous proactivity research has predominantly assumed that proactive personality generates positive environmental changes in the workplace. Grounded in recent research on personality development from a broad interactionist theoretical approach, the present article investigates whether work characteristics, including job demands, job control, social support from supervisors and coworkers, and organizational constraints, change proactive personality over time and, more important, reciprocal relationships between proactive personality and work characteristics. Latent change score analyses based on longitudinal data collected in 3 waves across 3 years show that job demands and job control have positive lagged effects on increases in proactive personality. In addition, proactive personality exerts beneficial lagged effects on increases in job demands, job control, and supervisory support, and on decreases in organizational constraints. Dynamic reciprocal relationships are observed between proactive personality with job demands and job control. The revealed corresponsive change relationships between proactive personality and work characteristics contribute to the proactive personality literature by illuminating more nuanced interplays between the agentic person and work characteristics, and also have important practical implications for organizations and employees. KW - proactive personality KW - personality change KW - work characteristics KW - dynamic reciprocal relationship KW - latent change score Y1 - 2014 U6 - https://doi.org/10.1037/a0036169 SN - 0021-9010 SN - 1939-1854 VL - 99 IS - 5 SP - 948 EP - 965 PB - American Psychological Association CY - Washington ER -