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Species Richness of vascular plants along the Climatic Gradient of Mountain Shennongjia in Central China

Journal of Shanghai University(English Edition) 2002年第3期6卷 265-268页

作者：李兆华 Manfred Denich Center for Development Research (ZEF) University of Bonn Walter-Flex-Str. 3 D- 53113 Bonn Germany

A case study on the richness variation of vascular plant species along the climatic gradient from mountain foot (400 m asl) up to the summit (3,100 m) was carried out in Mt. Shennongjia of central China. The results show that climatic features such as mean annual temperature ( Y =16.26-0.506 X, R 2 =0.995), mean annual precipitation ( Y=235.48+82.663X, R 2 =0.951) and frost free day ( Y=283.54-7.148X, R 2 =0.964) are linearly responding to the elevational increase. However the variation of species richness is not uniformly linearly correlated to the climatic gradients. From 400 m up to 1,000 m, the species number increases from 933 to 1718, with a increase rate of 126.18 species/100 m ( R 2=0.951, P <0.001). From 1,000 m up to the highest peak of 3,100 m, species richness gradually declines with a rate of 94.36 species/100 m ( R 2=0.961, P <0.001). This variation can be described by a cubic model, y =-458.22+463.93 x -30.64 x 2+0.53 x 3 ( R 2=0.989, P <0.0001). Analysis calls for further study for better understanding of the relationship between biodiversity and environmental variation in this key area.

关键词： vascular plant temperature precipitation altitudinal step Mt. Shennongjia.

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Paleo-polyploidization in Lycophytes

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Genomics, Proteomics & Bioinformatics 2020年第3期18卷 333-340页

作者： Jinpeng Wang Jigao Yu Pengchuan Sun Chao Li Xiaoming Song Tianyu Lei Yuxian Li Jiaqing Yuan Sangrong Sun Hongling Ding Xueqian Duan Shaoqi Shen Yanshuang Shen Jing Li Fanbo Meng Yangqin Xie Jianyu Wang Yue Hou Jin Zhang Xianchun Zhang Xiu-Qing Li Andrew HPaterson Xiyin Wang Center for Computational Biology and Genomics and School of Life SciencesNorth China University of Science and TechnologyTangshan 063200China National Key Laboratory for North China Crop Improvement and Regulation Agriculture University of HebeiBaoding 071001China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of ScienceBeijing 100093China Fredericton Research and Development Centre Agriculture and Agri-Food CanadaFrederictonNew BrunswickE3B 4Z7Canada plant Genome Mapping Laboratory University of AthensAthensGA 30602USA Department of plant Biology University of GeorgiaAthensGA 30602USA Department of Crop and Soil Science University of GeorgiaAthensGA 30602USA Department of Genetics University of GeorgiaAthensGA 30602USA

Lycophytes and seed plants constitute the typical vascular *** have been thought to have no paleo-polyploidization although the event is known to be critical for the fast expansion of seed ***,genomic analyses including the homologous gene dot plot analysis detected multiple paleo-polyploidization events,with one occurring approximately 13–15 million years ago(MYA)and another about 125–142 MYA,during the evolution of the genome of Selaginella moellendorffii,a model *** addition,comparative analysis of reconstructed ancestral genomes of lycophytes and angiosperms suggested that lycophytes were affected by more paleopolyploidization events than seed *** from the present genomic analyses indicate that paleo-polyploidization has contributed to the successful establishment of both lineages—lycophytes and seed plants—of vascular plants.

关键词： vascular plant Lycophytes Genome Polyploidy Evolution

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Elevational diversity of arrow bamboo (Fargesia spathacea) communities on Mount Shennongjia in Central China

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Journal of Forestry Research 2002年第3期13卷 171-176,250页

作者：李兆华曼丹里奇 Center for Developmant Research University of Bonn

Altitudinal changes in species richness, species diversity, species evenness, life-form spectrum, and community structure of arrow bamboo (Fargesia spathacea) were studied within 11 plots from 1 500 m to 2 600 m asl on Mount Shennongjia in Central China. From the lowest plot (1 680 m) to the highest one (2 570 m), vascular plants declined from 30 to 7 species, following a linear model ofY=55.99-1.83X (d.f.=9,F-value=48.64,r 2=0.84,Pplants (r=0.60), underground bulb perennials (r=0.40), and big trees (r=0.35) tended to increase; shrubs (r=?0.52) and middle-sized trees (r=?0.45) tended to decline; perennial grasses (r=0.04) and semi-shrubs (r=0.03) were not strongly related to the altitudinal gradient. Arrow bamboo communities could be classified into five groups: bamboo under evergreen broad-leaved forest, under deciduous broad-leaved forest, under temperate coniferous forest, under cold-temperate coniferous and mixed forest, and pure bamboo community.

关键词： Species richness Species diversity Life-form vascular plant Altitude

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