Phenological Complementarity Does not Enhance Ecosystem Production in Undisturbed Steppe Community
Phenological Complementarity Does not Enhance Ecosystem Production in Undisturbed Steppe Community作者机构：Key Laboratory of Arid and Grassland Ecology at Lanzhou University Ministry of Education Lanzhou 730000 China Key Laboratory of Resources Remote Sensing and Digital Agriculture Ministry of Agriculture Beijing 100083 China Inner Mongolia University Huhhot 010021 China
出 版 物：《Journal of Integrative Plant Biology》 (植物学报（英文版）)
年 卷 期：2007年第49卷第5期
页 面：582-587页
核心收录：
学科分类：090503[农学-草业科学] 0909[农学-草学] 07[理学] 0905[农学-畜牧学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学]
基 金：Supported by the National Natural Science Foundation (90102011) and National key Basic Research Special Funds (2002CB111505) of China. We thank Mr Wei-Dong Liu Mr Guang-Li He Ms Wen-Jing Liu and Mr Bao-Hui Zhang for practical assistance. Thanks also to Dr Guang-Lian QIN for helpful advice on data analysis and to Drs Sa Xiao Hui-Min Yang Xin Luan Ying Deng and You-Cai Xiong for helpful suggestions on an early version of the manuscript
主 题：ecosystem function phenological complementarity steppe community temporal variation total annual net primary productivity.
摘 要：Communities with more species could have a greater variety of species＇ characteristics, leading to more effective use of limiting resources through niche partitioning （complementarity） and therefore greater production. The effect of phenologlcal complementarity （PC） on ecosystem production has not been fully Investigated. The seasonal responses of all vascular plant species were tracked to test the effect of phenologlcal complementarity on ecosystem production within a natural stable steppe community. Although a significant phenologlcal pattern was observed, PC had no significant correlation with community production. The value of PC varied with years, but was observed only In a relatively narrow range during the experimental period. Species diversity （richness and evenness） had no correlation with the ecosystem production. The results suggest that the effect of PC may be saturated and has no contribution to the improvement of ecosystem production In a stable natural grassland community with abundant species.
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