| 摘要: |
| 在对甘肃莲花山国家级自然保护区（以下简称莲花山）进行深入考察的基础上，结合相关文献资料，对莲花山的种子植物多样性进行了统计分析，运用R/T值及聚类相似性分析法，对莲花山种子植物的区系特征及其与邻近6个地区种子植物区系的关系进行定量分析与比较。结果显示：（1）莲花山的植物种类丰富，共记录到种子植物85科348属892种，包含裸子植物3科6属11种和被子植物82科342属881种。保护区科属优势现象明显。（2）种子植物区系主要由温带成分构成（R/T=0.12），尤其是北温带成分占主导地位，体现了典型的温带特征。从科级水平来看，热带成分占53.49%，温带成分占44.18%；从属级水平来看，热带成分仅占8.91%，温带成分占则占76.59%。这又体现了该区从温带向热带的过渡特征。（3）聚类分析的结果显示，莲花山与同属祁连山脉的兴隆山和多儿保护区相似性最大，而与秦岭山脉的白水江和小陇山的相似性较低。 |
| 关键词: 甘肃莲花山 种子植物 植物区系 R/T值 聚类分析。 |
| DOI： |
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| 基金项目:2023年提前批中央财政国家级自然保护区建设项目-保护区综合科学考察 |
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| Diversity and Flora Characteristics of Seed Plants in the Gansu Lianhua Mountain National Nature Reserve |
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刘晓娟,Li Qinxia²,Liu Gaixiang²,Ma Yuxiang²,Wang Qingxia²,Zhao Ya²,Zhang Hongfang²
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| Abstract: |
| Based on an in-depth investigation of the Lianhua Mountain National Nature Reserve in Gansu Province (hereinafter referred to as Lianhua Mountain) and relevant literature, statistical analysis was conducted on the diversity of seed plants in Lianhua Mountain. Using R/T values and cluster similarity analysis methods, quantitative analysis and comparison were conducted on the floral characteristics of seed plants in Lianhua Mountain and its relationship with seed plant flora in six neighboring regions. The results showed that: (1) Lianhua Mountain has a rich variety of plant species, with a total of 892 species of seed plants belonging to 348 genera in 85 families, including 11 species of gymnosperms belonging to 6 genera in 3 families and 881 species of angiosperms belonging to 342 genera in 82 families. The phenomenon of dominant species in protected areas is obvious. (2) The seed plant flora is mainly composed of temperate components (R/T=0.12), especially dominated by northern temperate components, reflecting typical temperate characteristics. At the departmental level, tropical components account for 53.49% and temperate components account for 44.18%; At the subordinate level, tropical components account for only 8.91%, while temperate components account for 76.59%. This also reflects the transitional characteristics of the region from temperate to tropical. (3) The results of cluster analysis show that Lianhua Mountain has the highest similarity with Xinglong Mountain and Duoer Nature Reserve, both belonging to the Qilian Mountains, while its similarity with Baishuijiang and Xiaolong in the Qinling Mountain is relatively low. |
| Key words: Gansu Lianhua Mountain Wild seed plant Flora R/T value Cluster analysis. |
