坡向和坡位对四川夹金山灌丛群落结构与物种多样性特征的影响

doi:10.13287/j.1001-9332.202008.004

应用生态学报 ›› 2020, Vol. 31 ›› Issue (8): 2507-2514.doi: 10.13287/j.1001-9332.202008.004

坡向和坡位对四川夹金山灌丛群落结构与物种多样性特征的影响

张荣¹, 余飞燕¹, 周润惠¹, 董洪君¹, 王敏¹, 叶鑫¹, 郝建锋^1,2*

¹四川农业大学林学院, 成都 611130;
²水土保持与荒漠化防治重点实验室, 成都 611130

收稿日期:2020-02-25 修回日期:2020-05-27 出版日期:2020-08-15 发布日期:2021-02-15
通讯作者: * E-mail: haojf2005@aliyun.com
作者简介:张荣, 女, 1997年生, 硕士研究生。主要从事森林生态学研究。E-mail: 987179246@qq.com
基金资助:
国家自然科学基金项目(31370628)、四川省教育厅一般项目(15ZB0020)和四川农业大学双支计划项目(03571838)资助

Effects of slope position and aspect on structure and species diversity of shrub community in the Jiajin Mountains, Sichuan Province, China

ZHANG Rong¹, YU Fei-yan¹, ZHOU Run-hui¹, DONG Hong-jun¹, WANG Min¹, YE Xin¹, HAO Jian-feng^1,2*

¹College of Forestry, Sichuan Agricultural University, Chengdu 611130, China;
²Key Laboratory of Soil & Water Conservation and Desertification Combating, Chengdu 611130, China

Received:2020-02-25 Revised:2020-05-27 Online:2020-08-15 Published:2021-02-15
Supported by:
This work was supported by the National Natural Science Foundation of China (31370628), the General Project of Sichuan Provincial Department of Education (15ZB0020), and the Sichuan Agricultural University Double Branch Program (03571838).

摘要/Abstract

摘要： 研究不同坡向、坡位夹金山灌丛群落结构和物种多样性特征。结果表明: 在 24 个样地中,共有维管植物 186 种,隶属于 50 科 127 属。其中,灌木层有 32 种,隶属于 14 科 22 属,阴坡下坡位物种数最多;草本层有 154 种,隶属于 43 科 109 属,阴坡物种数最少。灌木层的平均高度表现为阳坡>半阳坡>阴坡,平均密度则相反;草本层平均高度表现为阴坡>半阳坡>阳坡,平均密度无显著变化。坡位仅对阳坡草本层平均高度有显著影响,灌木层物种多样性在阴坡较高,草本层物种多样性在阳坡下坡位和阴坡中坡位较高。坡向对灌木层和草本层 Shannon多样性指数、Simpson优势度指数、物种丰富度指数、Pielou均匀度指数影响显著(除草本层 Simpson 指数),坡位对灌木层和草本层物种多样性指数均无显著影响,坡向和坡位的交互作用对草本层物种多样性的影响大于灌木层。冗余分析(RDA)表明,物种多样性不仅与坡向正弦值、坡向余弦值相关,也与群落结构特征相关性较大。

关键词: 坡向, 坡位, 群落结构, 物种多样性

Abstract: We examined the impacts of slope direction and position on the community structure and species diversity of shrub community in Jiajin Mountains. The results showed that a total of 186 vascular plant species belonging to 50 families and 127 genera were recorded in the 24 sample plots. 32 species belonging to 14 families, 22 genera were recorded in the shrubs layer, with most species distributed at lower position of the shady slope. 154 species belonging to 43 families and 109 genera were recorded in the herbaceous layer, with the species number being the lowest on the shady slope. The average height of the shrub layer showed a decreasing order of sunny slope, semi-sunny slope, and shady slope, while an opposite order was observed for the average density. The average height of the herb layer was in the decreasing order of the shady slope, semi-sunny slope, sunny slope, whereas no significant changes were observed for the average density. The slope position had significant effect only on the average height of the herbaceous layer on the sunny slope. The overall level of species diversity in the shrub layer on the shady slope was relatively high, while that in the herbaceous layer was relatively high at the lower position of the sunny slope and at the middle position of the shady slope. Slope aspect had significant effect on species richness index, Shannon diversity index, Simpson dominance index, Pielou evenness index of shrub and herb layers except for Simpson index of herb layer. Slope position did not affect these indices. The interaction effect of slope aspect and position on the diversity index for herb layer was greater than that for the shrub layer. Results from redundancy analysis showed that species diversity was related to sin(aspect), cos(aspect), and community structure.

Key words: aspect, slope position, community structure, species diversity

张荣, 余飞燕, 周润惠, 董洪君, 王敏, 叶鑫, 郝建锋. 坡向和坡位对四川夹金山灌丛群落结构与物种多样性特征的影响[J]. 应用生态学报, 2020, 31(8): 2507-2514.

ZHANG Rong, YU Fei-yan, ZHOU Run-hui, DONG Hong-jun, WANG Min, YE Xin, HAO Jian-feng. Effects of slope position and aspect on structure and species diversity of shrub community in the Jiajin Mountains, Sichuan Province, China[J]. Chinese Journal of Applied Ecology, 2020, 31(8): 2507-2514.

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坡向和坡位对四川夹金山灌丛群落结构与物种多样性特征的影响

Effects of slope position and aspect on structure and species diversity of shrub community in the Jiajin Mountains, Sichuan Province, China

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