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Vegetation and environment changes inferred from pollen records since 3000 cal. yr BP in kanas wetland, Xinjiang

Journal of Plant Ecology 2019年第5期12卷 907-916页

作者： Yumei Li Yun Zhang Zhaochen Kong Long Zhao Li Wang Yuanyuan Li Lixin Chen State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China College of Earth Sciences Jilin UniversityChangchun 130061China Beijing Geological and Mineral Exploration and Development Bureau Beijing 100195China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Aims climate change can significantly affect the vegetation ***,paleovegetation and paleoclimate reconstruction should consider the quantitative relationship between modern vegetation and *** specific objectives of this study were(i)to assess the influence of environmental variables on pollen assemblages in the kanas region,(ii)to reconstruct the evolution of vegetation over the past 3000 years using pollen records and(iii)to quantify historical climate change(including mean annual temperature and total annual precipitation)using a weighted averaging partial least squares regression method(WAPLS)applied to fossil pollen data from the kanas wetland in Xinjiang,*** A total of 65 surface and 50 fossil samples were collected from the kanas wetland and analysed for 14c,pollen and grain *** com-bining these data with those obtained from 214 samples of surface pollen assemblages in north Xinjiang,the late Holocene climate was reconstructed using a WAPLS *** Findingsthe vegetation in kanas was dominated by forest for the past 3000 years,undergoing an arbour-vegetation transition from predominantly pine to spruce over that *** WAPLS model showed that the paleoclimate progressed from cold-wet to warm-dry and subsequently back to *** to 1350 calibrated years before the present(*** BP),the climate of kanas was cold and wet,and conditions became increasingly warm and dry until 870 *** *** temperature reconstruction model indicated that a‘Little Ice Age’occurred~380 *** *** data will help us improve the understanding of abrupt climate change and provide important information regarding the prediction of climate.

关键词： climate change kanas wetland north Xinjiang pollen grain size

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