古尔班通古特沙漠南部植物群落β多样性及其解释

摘要/Abstract

摘要： β多样性是表示植物群落物种组成变化的一个重要指示因子。本研究以古尔班通古特沙漠南部为研究区域,在67个样地植被学调查基础上,首先对研究区植物群落β多样性经向和纬向的变化进行了分析,其次利用方差分解的方法分析环境变量,土壤种子库变量及空间变量对β多样性分异的贡献率,探讨沙漠植被β多样性变化机制。结果表明,β多样性在经向上由西向东物种相似性增加,物种替代速率减弱;在纬向上自北向南物种相似性降低,物种替代速率略有升高。对β多样性分异解释方面,环境变量中的30年月平均降水量等变量在沙漠植被群落分布中起着决定性的作用,土壤变量与空间变量的解释比率则相对较低,而土壤种子库变化较土壤异质性对β多样性影响更大。主环境变量、土壤变量的效应是尺度依赖的。空间结构决定的随机过程也发挥着作用。研究还发现除环境变量(含土壤变量),土壤种子库变量及空间变量外,仍有近50%的β多样性分异未能解释,表明其他环境因子和随机过程对植被的影响也较大。

Abstract: β diversity is an important index characterizing composition variation of vegetation community. The southern part of Gurbantunggut Desert is taken as the study area in this paper, on the basis of vegetation survey in 67 plots, β diversity variation of vegetation community in the study area is analyzed first in longitudinal and latitudinal directions, and then the method of variance partitioning is used for analyzing contribution ratio of environment variable, soil seed bank variable and spatial variable to β diversity differentiation, discussing the mechanism of β diversity differentiation of desert vegetation. It is shown with the results that β diversity is an increase of species similarity from west to east in longitudinal direction, and the species succession rate declines; a decrease of species similarity from north to south in latitudinal direction, and the species succession rate increases slightly. Regarding interpretation of β diversity differentiation, the environment variables such as 30-year’s average monthly precipitation play a decisive role in distribution of desert vegetation community, while the interpretation ratio of soil variable and spatial variable are relative low. Comparing with soil heterogeneity, the variation of soil seed bank has a bigger impact on β diversity differentiation. The main environmental variables, soil variables effect were scale dependent. Neutral process determined by the spatial structure also plays a role. It is found out that although environment variables (including soil variable), soil seed bank variable and spatial variable are taken into consideration, nearly 50% of β diversity differentiation cannot be interpreted, which indicates that some other environment variables and random process have impact on the variation of vegetation community.

中图分类号:

Q948.15

赵怀宝,刘彤,雷加强,桂东伟,赵新俊. 古尔班通古特沙漠南部植物群落β多样性及其解释[J]. 草业学报, 2010, 19(3): 29-37.

ZHAO Huai-bao, LIU Tong, LEI Jia-qiang, GUI Dong-wei, ZHAO Xin-jun. β diversity characteristic of vegetation community on south part of Gurbantunggut Desert and its interpretation[J]. Acta Prataculturae Sinica, 2010, 19(3): 29-37.

参考文献

[1] Chapin S F, Schulze E D, Mooney H A. Biodiversity and ecosystem process[J]. Trends in Ecology and Evolution, 1992, 7:107-108.
[2] Hector A, Bagchi R. Biodiversity and ecosystem multifunctionality[J]. Nature, 2007, 448: 188-190.
[3] Hooper D U, Chapin F S, Ewel J J, et al. Effects of biodiversity on ecosystem functioning: A consensus of current knowledge[J]. Ecological Monographs, 2005, 75: 3-35.
[4] Whittaker R H. Evolution and measurement of species diversity[J]. Taxon, 1972, 21: 213-251.
[5] Magurran A. Ecological diversity and its measurement[M]. New Jersey: Princeton University Press, 1988.
[6] 左小安, 赵哈林, 赵学勇, 等. 科尔沁沙地不同恢复年限退化植被的物种多样性[J]. 草业学报, 2009, 18(4): 9-16.
[7] Harrison S, Ross S J, Lawton J H. Beta diversity on geographical gradients in Britain[J]. Journal of Animal Ecology, 1992, 61: 151-158.
[8] Legendre P, Borcard D, Pere-Neto P R. Analyzing beta diversity: Partitioning the spatial variation of community composition data[J]. Ecological Monographs, 2005, 75: 435-450.
[9] Legendre P. Studying beta diversity: Ecological variation partitioning by multiple regression and canonical analysis[J]. Journal of Plant Ecology, 2007, 31: 976-981.
[10] Borcard D, Legendre P. All-scale spatial analysis of ecological data by means of principal coordinates of neighbour matrices[J]. Ecology Modelling, 2002, 153: 51-68.
[11] Borcard D, Legendre P, Avois-Jacquet C, et al. Dissecting the spatial structure of ecological data at multiple scales[J]. Ecology, 2004, 85: 1826-1832.
[12] Gilbert B, Lechowicz M J. Neutrality, niches, and dispersal in a temperate forest understory[J]. Proceeding National Academic Science USA, 2004, 101: 7651-7656.
[13] Jones M M, Tuomisto H, Borcard D, et al. Explaining variation in tropical plant community composition: Influence of environmental and spatial data quality[J]. Oecologia, 2008, 155: 593-604.
[14] Karst J, Gilbert B, Lechowicz M J. Fern community assembly: the roles of chance and the environment at local and intermediate scales[J]. Ecology, 2005, 86: 2473-2486.
[15] Laliberté E, Paquette A, Legendre P, et al. Assessing the scale——specific importance of niches and other spatial processes on beta diversity: A case study from a temperate forest[J]. Oecologia, 2009, 159: 377-388.
[16] Legendre P, Mi X C, Ren H B, et al. Partitioning beta diversity in a subtropical broad-leaved forest of China[J]. Ecology, 2009, 90(3): 663-674.
[17] 张立运, 陈昌笃. 论古尔班通古特沙漠植物多样性的一般特点[J]. 生态学报, 2002, 22(11): 1923-1932.
[18] 潘晓玲, 王学才, 雷加强. 关于中国西部干旱区生态环境演变与控制的一些思考[J]. 地球科学进展, 2001, 16(1): 24-27.
[19] Dray S, Legendre P, Peres-Neto P R. Spatial modelling: A comprehensive framework for principal coordinate analysis of neighbour matrices (PCNM)[J]. Ecological Modelling, 2006, 196: 483-493.
[20] 王雪芹, 王涛, 蒋进, 等. 古尔班通古特沙漠南部沙面稳定性研究[J]. 中国科学, 2004, 34(8): 763-768.
[21] Zhang Y M, Chen J, Wang L. The spatial distribution patterns of biological soil crusts in the Gurbantunggut Desert, Northern Xinjiang, China[J]. Journal of the Arid Environment, 2007, 68: 599-610.
[22] IBAS (Institute of Botany, Academia Sinica). Iconographia Cormophytorum Sonicorum[A]. Tomus 1-5, Supplementum 1-2[M]. Beijing: Science Press, 1983.
[23] Global precipitation climatology centre. Global precipitation analysis products[EB/OL]. (2008-12-30)[2009-04-15]. http://gpcc.dwd.de.
[24] Adler R F, Huffman G J, Chang Alfred, et al. The version-2 global precipitation climatology project (GPCP) monthly precipitation analysis (1979-Present)[J]. Journal of Hydrometeorology, 2003, 4: 1147-1167.
[25] Nezlin N P, Kostianoy A G, Li B L. Inter-annual variability and interaction of remote-sensed vegetation index and atmospheric precipitation in the Aral Sea region[J]. Journal of Arid Environments, 2005, 62: 677-700.
[26] 中国土壤学会农业化学专业委员会.土壤农业化学常规分析方法[M]. 北京: 科学出版社, 1983.
[27] Nathan R, Muller-Landau H C. Spatial patterns of seed dispersal, their determinants and consequences for recruitment[J]. Trends in Ecology and Evolution, 2000, 15:278-285.
[28] 尚占环, 徐鹏彬, 任国华, 等. 土壤种子库研究综述——植被系统中的作用及功能[J]. 草业学报, 2009, 18(2): 175-183.
[29] Guo Q F, Rundel P W, Goodall D W. Structure of desert seed banks: Comparisons across four North American desert sites[J]. Journal of Arid Environments, 1999, 42: 1-14.
[30] 尚占环, 任国华, 龙瑞军. 土壤种子库研究综述——规模、格局及影响因素[J]. 草业学报, 2009, 18(1): 144-154.
[31] Rao C D. The use and interpretation of principal components analysis in applied research[J]. Sankhyaá, 1964, 26: 329-358.
[32] Legendre P, Legendre L. Numerical Ecology[M]. Second English Edition. Amsterdam: Elsevier Science BV, 1998.
[33] R Development Core Team. R: A language and environment for statistical computing[EB/OL]. (2009-08-24)[2009-10-15]. http://www. R-project.org.
[34] Oksanen J, Kindt R, Legendre P, et al. Vegan: Community ecology package[J]. R Package Version, 2007, 1: 9-25.
[35] Wiersma Y F, Urban D L. Beta diversity and nature reserve system design in the Yukon, Canada[J]. Conservation Biology, 2005,19(4): 1262-1272.
[36] Aguado-Santacruz A, García-Moya E. Environmental factors and community dynamics at the southern part of the North American Graminetum I. On the contribution of climatic factors to temporal variation in species composition[J]. Plant Ecology, 1998, 135: 13-29.
[37] Whittaker R H, Niering W A. Vegetation of the Santa Catalina Mountains, Arizona V. Biomass, production and diversity along the elevation gradient[J]. Ecology, 1975, 56: 771-790.
[38] Nobel P S. Remarkable Agaves and Cacti[M]. New York: Oxford University Press, 1994.
[39] Barrera M D, Frangi J L, Richter L L, et al. Structural and functional changes in Nothofagus pumilio forests along an altitudinal gradient in Tierra del Fuego, Argentina[J]. Journal Vegetation Science, 2000, 11: 179-188.
[40] Huston M A. Biological Diversity: The Coexistence of Species on Changing Landscapes[M]. Cambridge: Cambridge University Press, 1994.
[41] Miki T, Kondoh M. Feedbacks between nutrient cycling and vegetation predict plant species coexistence and invasion[J]. Ecology Letter, 2002, 5: 624-633.
[42] Oztas T, Koc A, Comakli B. Changes in vegetation and soil properties along a slope on overgrazed and eroded rangelands[J]. Journal of Arid Environments, 2003, 55: 93-100.
[43] Ehrlen J, Munzbergova Z, Diekmann M, et al. Long-term assessment of seed limitation in plants: Results from an 11-year experiment[J]. Journal of Ecology, 2006, 94: 1224-1232.
[44] Zobel M, Otsus M, Liira J, et al. Is small-scale species richness limited by seed availability or microsite availability?[J]. Ecology, 2000, 81(12): 3274-3282.
[45] 李有志, 张灿明, 林鹏. 土壤种子库评述[J]. 草业科学, 2009, 26(3): 83-90.