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Distributional patterns of anemophilous tree pollen indicating the pathways of Indian monsoon through QinghaieTibetan Plateau

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Journal of Palaeogeography 2017年第4期6卷 352-358页

作者： Zhi-Yong Zhang cheng-sen li Lushan Botanical Garden Jiangxi Province and Chinese Academy of Sciences State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences

The distribution pattern of vegetation on QinghaieTibetan Plateau is fundamentally influenced by the plateau climate, which is mainly controlled by Indian monsoon during summer. The long distance transportation of pollen（mostly anemophilous taxa） produced by trees on the plateau has been recorded by modern pollen samples in previous studies, and hypothesized to be a good indicator of monsoon *** we use 270 surface pollen samples from QinghaieTibetan Plateau to test the distribution patterns of the anemophilous tree pollen. Meanwhile factors related to Indian monsoon affecting pollen transportation are simulated and analyzed. Results show that depositional patterns of anemophilous tree pollen, especially Abies, Pinus, Quercus and Betula are completely controlled by the pathways of Indian monsoon. This is reflected by climatic indicators of the atmospheric pressure pattern over JuneeJ ulye August, by the precipitation pattern over JuneeJulyeAugust and by the topographic feature of the plateau. The spatial interpolation of thin plate spline results also display two depositional centers（ca. 30°N, 95°E and 30°N, 105°E）of the anemophilous tree pollen. In contrast to previous conclusion that pollen distributional pattern is determined by mean annual precipitation, we argue that Indian monsoon is the essential controller because of the synchronization between timing of monsoon wind and timing of plants flowering. Our finding strongly suggests that distributional pattern of anemophilous tree pollen on the plateau is a good proxy of Indian monsoon.

关键词： Distributional patterns Anemophilous tree pollen Indian monsoon QinghaieTibetan Plateau Quaternary

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Spirematospermum wetzleri (Heer) Chandler (Zingiberaceae) from the Miocene of Weichang, Hebei Province, North China and the phytogeographic history of the genus

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Journal of Palaeogeography 2018年第4期7卷 308-315页

作者： Ya li Tie-Mei Yi Yue-Zhuo li cheng-sen li State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China cas key laboratory of economic stratigraphy and palaeogeography nanjing institute of geology and palaeontology chinese academy of sciences nanjing 210008jiangsu provincechina beijing institute of science and technology information beijing academy of science and technology beijing 100044china qian-dao-hu museum of natural history hangzhou 311700zhejiang provincechina

Spirematospermum is a well-known extinct zingiberalean taxon, characterized by trilocular capsules containing many distinctive, spirally striate and arillate seeds. It is frequently found and studied in European Neogene carpological floras, but is scarcely represented in East Asia floras. In this work we recognize a new fossil record of Spirematospermum wetzleri（Heer） Chandler based on the capsules and seeds from the Miocene of Weichang, Hebei Province, North China. These fossils represent the first record of the species in the Miocene of China. Fossil data indicate that Spirematospermum probably originated in the Late Cretaceous of North America or Central *** genus still existed in the Paleocene of North America, but became extinct after that time. However, the genus successively survived in Europe from the Eocene to Pliocene, and flourished luxuriantly during the Oligocene to Miocene. As there was Turgai Strait between Europe and Asia during the Eocene, the genus did not spread to Central Asia and West Siberia until the strait closed in the late Eocene/early Oligocene, and further expanded eastwardly to eastern Siberia, Russia, northern China and central Japan during the Miocene, but became extinct in Asia after the Miocene. The genus contracted its distribution to Europe in the Pliocene, and afterwards it became extinct in the world.

关键词： Spiremotospermum Zingiberaceae Musaceae Phytogeographic history Neogene Miocene Weichang North China

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Plants of Leptostrobus Heer （Czekanowskiales） from the Early Cretaceous and Late Triassic of China, with Discussion of the Genus

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Journal of Integrative Plant Biology 2006年第2期48卷 137-147页

作者： Xiu-Qun liu cheng-sen li Yu-Fei Wang Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Investigation of the Mesozoic seed plant Leptostrobus Heer from the Yangcaogou Formation of the Late Triassic and the Yixian Formation of the Early Cretaceous, liaoning Province, China, provides new Insight Into Its general morphology and geographical distribution. The materials of L. cancer from the Yixian Formation described herein are later than all the past findings of this species and add to the record of L. cancer during the Early Cretaceous. Based on well-preserved specimens, the specific diagnosis Is slightly emended and the reconstructlon of L. cancer Is perfected. The materials from the Yangcaogou Formation of the Late Triassic are placed in L. spheericus, in addition, we review the history of investigation of the genus Leptostrobus since its establishment in 1876 and discuss the main characteristics of each species.

关键词： Early Cretaceous Late Triassic Leptostrobus Yangcaogou Formation Yixian Formation.

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Nectar and Pollen Sources for Honeybee （Apis cerana cerana Fabr.） in Qinglan Mangrove Area, Hainan Island, China

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Journal of Integrative Plant Biology 2006年第11期48卷 1266-1273页

作者： Yi-Feng Yao Subir Bera Yu-Fei Wang cheng-sen li State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Department of Botany University of Calcutta Kolkata 700019 India Graduate School the Chinese Academy of Sciences Beijing 100039 China Beijing Museum of Natural History Beijing 100050 China

In the present study, nectar and pollen sources for honeybee （Apls cerana cerana Fabr.） were studied in Qlnglan mangrove area, Hainan Island, China, based on microscopic analysis of honey and pollen load （corblcular and gut contents） from honeybees collected In October and November 2004. Qualitative and quantitative melittopalynologlcal analysis of the natural honey sample showed that the honey is of unlfloral type with Mimosa pudlca L. （Mlmosaceae） as the predominant （89.14%） source of nectar and pollen for A. cerana cerana In October. Members of Araceae are an Important minor （3%-15%） pollen type, whereas those of Arecaceae are a minor （〈3%） pollen type. Pollen grains of Nypa fruticans Wurmb., Rhlzophora spp., Excoecarla agallocha L., Lumnitzera spp., Brugulera spp., Kandella candel Druce, and Ceriops tagal （Perr.） C. B. Rob. are among the notable mangrove texa growing In Qinglan mangrove area recorded as minor taxa In the honey. The absolute pollen count （I.e. the number of pollen grains/10 g honey sample） suggests that the honey belongs to Group V （〉1 000 000）. Pollen analysis from the corblcular and gut contents of A. cerana cerana revealed the highest representation （95.60%） of members of Sonneratia spp. （Sonneratlaceae）, followed by Bruguiera spp. （Rhizophoraceae）, Euphorblaceae, Poaceae, Fabaceae, Arecaceae, Araceae, Anacardlaceae, and Rublaceae. Of these plants, those belonging to Sonneratla plants are the most Important nectar and pollen sources for A. cerana cerana and are frequently foraged and pollinated by these bees in November.

关键词： Hainan Island honeybee mangrove nectar and pollen sources.

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The complexity of climate reconstructions using the coexistence approach on Qinghai-Tibetan Plateau

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Journal of Palaeogeography 2019年第1期8卷 68-77页

作者： Zhi-Yong Zhang Dong-Mei cheng cheng-sen li Wan Hu Xuan-Huai Zhan Hong-li Ji Lushan Botanical Garden Jiangxi Province and Chinese Academy of Sciences State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences

Quantifying the palaeoclimates of Qinghai–Tibetan Plateau is vital for understanding the uplift history of plateau and the evolution of Asian monsoon since Cenozoic. Recently, the Coexistence Approach(CA) has been employed to reconstruct the palaeoelevation and palaeoclimate of the plateau by several studies. However, the application of CA in mountainous areas and the realism of climate reconstructions via this method are seldom discussed,although the complexity of reconstructions is speculated. Here we reevaluated the realism of climate reconstruction using the CA with modern pollen samples from the Qinghai–Tibetan Plateau, and try to explore the possible factors influencing the precipitation and temperature reconstructions by CA. We suggest that the long-distance transport pollen as a result of the Asian summer monsoon potentially significantly affects the reconstructions both for precipitation and temperature. The precipitation complexly interacting with snowmelt and permafrost thaw leads to the discrepancy between the reconstructed precipitation and the real value. The response temperature for blossoming of dwarfed plants on the plateau is mostly likely higher than the air temperature(usually measured at1.5 m above ground) due to energy flux or morphological adaptation of inflorescences during the growing season,causing the distortion of temperature reconstructions. Precipitation reconstruction is notoriously difficult as the establishers of CA have already suggested, but reconstructing the low temperatures may be even more challenging on Qinghai–Tibetan Plateau. Though all of the explorations in current paper are in a qualitative way, it offers an inspiration of how appropriately interpret the disagreements between CA results and the observations, and of how to obtain a reasonable reconstruction of palaeoclimate of the plateau.

关键词： Complexity Climate reconstruction Coexistence approach Modern pollen assemblages Qinghai-Tibetan Plateau

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Fruits of Scirpus(Cyperaceae) from the early Miocene of Weichang,Hebei Province,North China and their palaeoecological and palaeobiogeographical implications

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Journal of Palaeogeography 2019年第2期8卷 142-149页

作者： Ping Lu Ya li Jian-Wei Zhang Xiao-Qing liang Yue-Zhuo li cheng-sen li School of Chemistry BiologyEnvironmentYuxi Normal University CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of Sciences Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Qian-Dao-Hu Museum of Natural History State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences

This paper describes the fossil fruits of Scirpus weichangensis ***,*** the early Miocene of Guangyongfa Village,Weichang County,Hebei Province,North *** fossil fruits are obovate in shape and their lateral sections are plumply *** cell walls of the surface are *** persistent stout bristles have downward-directed barbellae in distal 1/*** occurrence of the fossil Scirpus indicates that Guangfayong was a wetland in the early *** on the fossil data,the genus likely originated in Western Siberia in the Oligocene,spread during the Miocene,and was finally distributed worldwide in the Holocene.

关键词： Scirpus Early Miocene Palaeoecology Palaeobiogeography Weichang

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Late Miocene wood flora associated with the Yuanmou hominoid fauna from Yunnan, southwestern China and its palaeoenvironmental implication

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Journal of Palaeogeography 2014年第3期3卷 323-330页

作者： Ye-Ming cheng Yu-Fei Wang cheng-sen li The Geological Museum of China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany Chinese Academy of Sciences

The Upper Miocene Xiaohe Formation of the Yuanmou Basin in Yunnan Pro- vince, southwestern China, is famous for its hominoid fauna and is important for studying the Late Cenozoic human and mammal evolution. Abundant fossil wood was found associated with this fauna, which provided important evidence for palaeoenvironmental reconstruction of the basin. Among the fossil wood, two different taxa have been identified namely, Quercoxylon sp. （Fagaceae） and Pterocarya sp. （Juglandaceae）. Based on the habitats of their Nearest living Relatives （NRLs）, it is suggested that upland subtropical evergreen broad-leaved forest dominated by Quercusllithocarpus was common around the basin, while a lowland deciduous broad-leaved forest dominated by Pterocarya was present on the river bank of the basin during the Late Miocene.

关键词： fossil wood Quercoxylon Pterocarya palaeovegetation Late Miocene,Yuanmou Basin

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Cyclocarya cf. paliurus （Batal.） Iljinskaja （Juglandaceae） from the Hunchun Formation （Eocene）, Jilin Province, China

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Journal of Integrative Plant Biology 2005年第11期47卷 1281-1287页

作者： Tong-Xing SUN Albert G. ABLAEV Yu-Fei WANG cheng-sen li Institute of Botany the Chinese Academy of Sciences Beijing 100093 China School of life Sciences Laiyang Agricultural College Laiyang 265200 China Pacific Oceanological Institute Russian Academy of Sciences Vladivostok 600041 Russia Beijing Museum of Natural History Beijing 100050 China

The leaflet architecture of Cyclocarya cf. paliurus （Batal.） Iljinskaja from the Hunchun Formation （Middle Eocene） shows similarity to that of modem C. paliurus （Batal.） Iljinskaja and the specimen is the oldest fossil record in Europe and Asia. The distributions of C. cf. paliurus and other fossil records, such as Glyptostrobus, Metasequoia, Nyssa, and liquidambar, in Hunchun flora show that it would have been a warmer-temperature to subtropical climate in Hunchun District during the Eocene period.

关键词： China Cyclocarya cf. paliurus Eocene Juglandaceae.

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Palaeophytochemical Constituents of Cretaceous Ginkgo coriacea Florin Leaves

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Journal of Integrative Plant Biology 2006年第8期48卷 983-990页

作者： You-Xing Zhao cheng-sen li Xiao-Dong Luo Yu-Fei Wang Jun Zhou State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany the Chinese Academy of Sciences Kunming 650204 China Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Chemical investigation of the organic solvent extract of Cretaceous Ginkgo coriacea Florin leaves by liquid chromatography-mass spectroscopy （LC-MS） and gas chromatography-mass spectrometry （GC-MS）, analogous to those from extant leaves of Ginkgo biloba L., led to the detection of a group of natural flavonoids and other volatiles. The similarity of the chemical constituents in these two species of Ginkgo suggest that the secondary metabolism of extant G. biloba is close to that of the Cretaceous species. The remaining natural products may be one explanation why the leaves of the Cretaceous G. coriacea have been preserved morphologically in fossilization. The detection of flavonoids suggests that the leaves of G. coriacea experienced a mild post-depositional environment during their fossilization. This appears to be the oldest occurrence of flavonoids in plant fossils.

关键词： constituents Cretaceous fossil Ginkgo biloba Ginkgo coriacea palaeophytochemistry.

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Uniqueness Problem for the Backward Differential Equation of a Continuous-State Branching Process

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Acta Mathematica Sinica,English Series 2024年第8期40卷 1825-1836页

作者： Pei sen li Zeng Hu li School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100872P.R.China School of Mathematical Sciences Beijing Normal UniversityBeijing 100875P.R.China

The distributional properties of a multi-dimensional continuous-state branching process are determined by its cumulant semigroup,which is defined by the backward differential *** provide a proof of the assertion of Rhyzhov and Skorokhod(Theory ***.,1970)on the uniqueness of the solutions to the equation,which is based on a characterization of the process as the pathwise unique solution to a system of stochastic equations.

关键词： Continuous-state branching process multi-dimensional backward differential equation stochastic equation generator

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