并用双重筛选逐步回归的方法分析了环境(气候和土壤)因子与植物群落生活型谱梯度的关系，建立了相应的数学模型。
The relationship between environmental factors (climate and soil) and plant life form gradient was analysed by doub sieving progressive regression method, and mathematical models were set up.
排序图表达了植物群落的环境梯度、结构梯度和人为干扰。
The environmental gradient, structural gradient and human-disturbance could be well expressed in the ordination plot.
本研究对广东中山淡水寡毛类进行了区系调查，对长江中下游13个阻隔湖泊和通江湖泊进行了底栖动物群落环境梯度分析，初步构建了环境指示函数。
The present paper embodies two studies: faunal analysis of aquatic oligochaeta in Zhongshan, South China, and environment gradient analyses of zoobenthos in 13 Yangtze shallow lakes.
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