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.
动物群落与沉积环境有直接关系。
Faunal assemblage are directly related to the depositional environment.
其次要处理好整个植物群落与大环境的关系。
Second, handle the relationship between the entire plant communities with the environment.
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