Ecological regionalization for bamboo in Zhejiang Province
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摘要: 以生态学原理为指导，按照生态区划的基本原则与方法，并结合区划对象的基本特征，采用定量分析与定性分析相结合的办法，对浙江省竹类植物适生区域进行了划分。区划的基本手段为聚类，即选择影响竹类植物生长与分布的因子组成指标体系，并划分为生态类与经济类两大类指标，经相关性分析筛选之后，对所需指标数据进行标准化处理。然后分别以生态类与经济类指标作为指标变量，以浙江省69个市（县）作为样本总体进行样本聚类，依次划分出类与亚类，经分析调整后依次划分出6个竹林生态区与4个生态亚区，分别为：浙东北低山丘陵平原竹林生态区（平原竹林生态亚区、低山丘陵竹林生态亚区），浙西北山地竹林生态区，浙中低山丘陵盆地竹林生态区，浙西南低山盆地竹林生态区，浙东南沿海低山丘陵平原竹林生态区（平原竹林生态亚区、低山丘陵竹林生态亚区）和浙东沿海半岛岛屿竹林生态区。Abstract: Based on ecological theories, this research integrated qualitative and quantitative methods to do regional classification for bamboo in Zhejiang Province. We chose 69 cities and counties as investigated subjects. The Index System was constructed by integrating factors related to growth and distribution of bamboo, which is classified as ecological and economic indices, and all indices were standardized after filtering out redundant indices using a correlation analysis. The ecological factors included rainfall in bamboo shooting time, average annual rainfall, average temperatures in the hottest month and in the coldest month, extreme coldest temperature, accumulated temperature(≥ 10℃), accumulated days (≤ -5℃), average annual wind speed, longitude and latitude, and the economic factors were peasant population, population structure, population density, per capita GDP, forest area, forestry contribution, to do clustering analysis. The results showed that 69 cities and counties can be classified into six types, consisting of four sub-types, namely (Ⅰ)the north-easten hilly, plain and low mountainous division, including (Ⅰa)the plain sub-division, (Ⅰb)the hilly and low mountainous sub-division; (Ⅱ)the north-westen mountainous division; (Ⅲ)the middle hilly, basin and lowe mountainous division; (Ⅳ)the south-westen basin low mountainous division; (Ⅴ)the south easten coastal hilly, plain and low mountainous division, including (Ⅴa)the plain sub-division, (Ⅴb)the hilly and low mountainous sub-division); (Ⅵ)the easten penisular division.
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Key words:
- forest management /
- bamboo forest /
- ecological regionalization /
- Zhejiang Province /
- cluster analysis
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