Xu Zhi-Guo, He Yan, Yan Bai-Xing, Song Chang-Chun
Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences , Changchun 130012, China.
Ying Yong Sheng Tai Xue Bao. 2007 Apr;18(4):783-7.
Based on field investigation and by using Levins formulae, the niche breadth and niche overlap of dominant plant populations in Sanjiang Plain marsh wetland were studied. The results showed that the niche breadth of test marsh wetland plants decreased in the order of Carex pseudocuraica (0.907) > C. lasiocarpa (0.864) > Glyceria spiculosa (0.855) > Deyeuxia angustifolia (0.500) = Menyanthes trifotiata (0.500) = Naumburgia thyrsiflora (0.500) = Anemone dichotoma (0.500). The niche overlaps among C. lasiocarpa, C. pseudocuraica, M. trifotiata and N. thyrsiflora, and among G. spiculosa, D. angustifolia and A. dichotom were comparatively large, indicating an intense competition among them, while the niche overlap between M. trifotiata and N. thyrsiflora, and D. angustifolia and A. dichotoma was 0, suggesting their different manner of environmental adaptation. Soil water was the dominating environmental factor of wetland plant ecological adaptability. The niche fitness of plant to environment depended on the combined effect of soil water and nutrients. The niche characteristics of marsh wetland plants could better indicate their ecological adaptability and distribution range.
基于实地调查并运用Levins公式，对三江平原沼泽湿地优势植物种群的生态位宽度和生态位重叠进行了研究。结果表明，所测沼泽湿地植物的生态位宽度排序为：漂筏苔草（0.907）＞毛果苔草（0.864）＞沼原草（0.855）＞小叶章（0.500）=睡菜（0.500）=驴蹄草（0.500）=叉枝银莲花（0.500）。毛果苔草、漂筏苔草、睡菜和驴蹄草之间，以及沼原草、小叶章和叉枝银莲花之间的生态位重叠相对较大，表明它们之间竞争激烈，而睡菜与驴蹄草之间以及小叶章与叉枝银莲花之间的生态位重叠为0，表明它们对环境的适应方式不同。土壤水分是湿地植物生态适应性的主导环境因子。植物对环境的生态位适宜度取决于土壤水分和养分的综合作用。沼泽湿地植物的生态位特征能够较好地指示其生态适应性和分布范围。
