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松嫩平原草地群落物种多样性与生产力关系的研究 被引量:84

RELATIONSHIP BETWEEN PRODUCTIVITY AND PLANT SPECIES DIVERSITY OF GRASSLAND COMMUNITIES IN SONGNEN PLAIN OF NORTHEAST CHINA
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摘要 物种多样性对生态系统功能的作用是生物多样性研究的核心领域之一,而生态系统生产力水平是其功能的重要表现形式.自然群落的物种多样性常与生产力密切相关,其相关性格局主要表现为3种形式,即单调上升、单调下降和单峰关系.本研究结果支持单峰格局,即中等生产力水平物种多样性最高.并认为水的作用导致草地群落养分资源的空间异质性降低,物种竞争增大,从而物种多样性下降,但生产力明显增加.物种的共存依赖于进化上稳固的物种之间利用资源能力的交换,而物种在竞争能力和生产能力上的交换使具有更高生产力的物种是竞争的弱者.物种多样性与生产力的单峰格局可能受异质性生境中生态位特化的选择. The interaction of species diversity with ecosystem function is one of the core problems of biodiversity research, while productivity is the important modality of ecosystem function. The species diversity of natural communities is often strongly related to their productivity. Three patterns of this relationship are present, that is, to increase monotonically with productivity, to decrease monotonically with productivity and to be unimodally related to productivity. Studying the ecological mechanism creating these relationship patterns under different ecological conditions has important significance to biodiversity conservation and ecosystem management. The sampling regions are in Shuangliao, Changling and Qianguo counties, Jilin province, Northeast China. They are situated in the south of the Songnen Plain. This is a standard agro-pastoral transitional region. Natural vegetation is mainly composed of grassland communities. In August, 1999, the drying on-ground biomass, number of individual and plant species diversity of 16 grassland communities, including the meadow steppe dominated by Stipa baicalensis and Aneurolepidium chinense, the meadows dominated by A. chinense and herbage, the salinizational meadows dominated by Suaeda spp. on the over-salinization areas, as well as the elm (Ulmus pumila) sparse wood community on the hilled sand dune, were investigated respectively with 20 quadrates of 0.25 m 2. At the same time the nutrient content and water content of the soil were measured. All these communities had no effective grazing disturbance and were annually mowed in the autumn. The research results support the unimodal pattern, that is, the maximum species diversity occurs at intermediate levels of productivity. In addition, relationships between individuals and species diversity and between individuals and productivities are also unimodal patterns, although different communities differ in different relative patterns. The results verified with χ 2 show that all these unimodal relationships are remarkabl
作者 杨利民 周广胜 李建东 YANG Li-Min 1,2 ZHOU Guang-Sheng 2 and LI Jian-Dong 3 (1 Agroecological Research Center, Jilin Agricultural University, Changchun 130118, China) (2 Laboratory of Quantitative Vegetation Ecology, Institute of Botany, the Chinese Academy of Sciences
出处 《植物生态学报》 CAS CSCD 北大核心 2002年第5期 589-593,共5页 Acta Phytoecologica Sinica
基金 国家重点基础研究发展计划(973计划),中国科学院知识创新工程项目
关键词 松嫩平原 草地群落 物种多样性 生产力 关系 水分作用 异质性 Grassland community, Species diversity, Productivity, Function of water, Heterogeneity
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  • 1Abrams, P. A. 1995. Monotonic or unimodal diversity-productivity gradients: what does competition theory predict. Ecology, 76: 2019~2027. 被引量:1
  • 2Abramsky, Z.& M. L. Rodenzweig. 1984. Tilman's predicted productivity-diversity relationship shown by desert rodents. Nature, 309: 150~151. 被引量:1
  • 3Alatalo, R. V. 1981. Problems in the measurement of evenness in ecology. Oikos, 37: 199~204. 被引量:1
  • 4Al-Mufti, M. M., C. L. Sydes, S. B. Furness, J. P. Grime & S. R. Band. 1977. A quantitative analysis of shoot phenology and dominance in herbaceous vegetation. Journal of Ecology, 65: 759~791. 被引量:1
  • 5Chen L. Z.(陈灵芝).Frontiers of biodiversity science[J].生态学报,1997,17:565-572. 被引量:1
  • 6Grime, J. P. 1973. Control of species density in herbaceous vegetation. Journal of Environmental Management, 1: 151~167. 被引量:1
  • 7Huston, M. 1979. A general hypothesis of species diversity. American Naturalist, 113: 81~101. 被引量:1
  • 8Kassen, R., B. Angus, B. Graham & B. R. Paul. 2000. Diversity peaks at intermediate productivity in a laboratory microcosm. Nature, 406: 508~511. 被引量:1
  • 9Kempton, R. A. & L. R. Taylor. 1976. Models and statistics for species diversity. Nature, 262: 818-820. 被引量:1
  • 10Kempton, R. A. & L. R. Taylor. 1978. The Q-statistic and the diversity of floras. Nature, 275: 252-253. 被引量:1

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