Luan Zhaoqing, Wang Zhongxin, Yan Dandan, Liu Guihua, Xu Yingying
Key Laboratory of Wetland Ecology and Environment Science, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Road, Changchun 130102, China.
ScientificWorldJournal. 2013 Aug 26;2013:402067. doi: 10.1155/2013/402067. eCollection 2013.
The response of Carex lasiocarpa in riparian wetlands in Sanjiang Plain to the environmental gradient of water depth was analyzed by using the Gaussian Model based on the biomass and average height data, and the ecological water-depth amplitude of Carex lasiocarpa was derived. The results indicated that the optimum ecological water-depth amplitude of Carex lasiocarpa based on biomass was [13.45 cm, 29.78 cm], while the optimum ecological water-depth amplitude of Carex lasiocarpa based on average height was [2.31 cm, 40.11 cm]. The intersection of the ecological water-depth amplitudes based on biomass and height confirmed that the optimum ecological water-depth amplitude of Carex lasiocarpa was [13.45 cm, 29.78 cm] and the optimist growing water-depth of Carex lasiocarpa was 21.4 cm. The TWINSPAN, a polythetic and divisive classification tool, was used to classify the wetland ecological series into 6 associations. Result of TWINSPAN matrix classification reflected an obvious environmental gradient in these associations: water-depth gradient. The relation of biodiversity of Carex lasiocarpa community and water depth was determined by calculating the diversity index of each association.
基于生物量和平均高度数据，利用高斯模型分析了三江平原河岸湿地毛果苔草对水深环境梯度的响应，并得出了毛果苔草的生态水深幅度。结果表明，基于生物量的毛果苔草最佳生态水深幅度为[13.45厘米，29.78厘米]，而基于平均高度的毛果苔草最佳生态水深幅度为[2.31厘米，40.11厘米]。基于生物量和高度的生态水深幅度的交叉点证实，毛果苔草的最佳生态水深幅度为[13.45厘米，29.78厘米]，毛果苔草的最适生长水深为21.4厘米。采用多变量、分裂式分类工具TWINSPAN将湿地生态系列划分为6个群丛。TWINSPAN矩阵分类结果反映了这些群丛中明显的环境梯度：水深梯度。通过计算各群丛的多样性指数，确定了毛果苔草群落生物多样性与水深的关系。
