| 摘要: |
| 城市绿化建设是保护和提升城市生物多样性的重要途径。绿化树种多样性的均质化对城市生物多样性维持带来不可忽视的影响。以中国36个主要城市的城市绿化树种为研究对象，按树种起源分为乡土树种、省外树种、国外树种和栽培树种4类，分别探究其在全国尺度和气候带尺度下的均质化特征，以明晰中国城市绿化树种均质化特征在不同地理尺度下的差异，并揭示在不同地理尺度下中国城市绿化树种均质化现象的主导树种类型。结果发现：全国尺度下，城市绿化树种均质化现象具地理尺度效应，主要由栽培树种和国外树种主导；气候带尺度下，以北亚热带城市绿化树种均质化程度最高，中亚热带和暖温带次之，南亚热带和中温带最低，虽然仍由栽培树种和国外树种主导，但乡土树种与省外树种也有一定贡献。研究结果可为制定普适性的解决措施以缓解中国城市绿化树种均质化现象、保护和提升城市生物多样性提供参考依据。 |
| 关键词: 城市化 绿化树种多样性 生物均质化 全国尺度 气候带尺度 |
| DOI：10.14085/j.fjyl.2022.01.0053.06 |
| 分类号:Q948.1 |
| 基金项目:重庆市技术创新与应用示范专项重点研发项目（编号 cstc2018jszx-zdyfxmX0007）；科技部科技基础性工作专项（编号 2015FY210200-4） |
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| Homogeneous Characteristics of Urban Landscape Woody Plants Species Biodiversity in China Under Different Geographical Scales |
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JIN Cheng1, HU Siwei1, HU Yuandong2, YANG Yongchuan1
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1.Chongqing University;2.Northeast Forestry University
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| Abstract: |
| Urban greening construction is an important way to protect and promote urban biodiversity. However, homogenization of species biodiversity for landscape woody plants is a brake on the maintenance of urban biodiversity. Therefore, in this study, landscape woody plants in China’s 36 major cities were divided into four types according to the different geographical origins, namely native species, extra-province species, alien species, and cultivated species. We explored the landscape plants’ homogenization characteristics under national and climatic scales to clarify different characteristics under different geographical scales. We also revealed the main species that lead to the homogenization of landscape plants under different geographical scales. We found that the landscape plants’ homogenization exhibited scale-dependent phenomenon under the national scale, predominantly caused by cultivated and alien species. Under climatic scale, landscape plants in the northern subtropical zone had the highest homogenization degree of species composition, followed by middle subtropical and warm temperate zones, and southern subtropical and middle temperate zones with the lowest ones. Moreover, despite cultivated and alien species caused a tremendous impact on homogenization under climatic scale, native and extra-province species also contributed to it to certain degrees. In summary, this study can provide a basis for formulating universal solutions to alleviate landscape plants’ homogenization in China, so as to protect and promote urban biodiversity. |
| Key words: urbanization species biodiversity of landscape woody plants biotic homogenization national scale climatic scale |
| 引用本文: | 靳程,胡四维,胡远东,杨永川.不同地理尺度下中国城市绿化树种多样性的均质化特征[J].风景园林，2022，29（1）：53-58. |
| JIN Cheng,HU Siwei,HU Yuandong,YANG Yongchuan.Homogeneous Characteristics of Urban Landscape Woody Plants Species Biodiversity in China Under Different Geographical Scales[J].Landscape Architecture Journal, 2022, 29(1):53-58. |
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