Knowledge Resource Center for Ecological Environment in Arid Area
阿拉善高原荒漠植物生活型组成及其与水热因子的相关性 | |
其他题名 | The composition and distribution pattern of plant life forms in Alxa Plateau |
闫瑞亚; 娄安如; 谢苏阳; 尹本丰; 刘浪; 陆小亮 | |
来源期刊 | 北京师范大学学报. 自然科学版
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ISSN | 0476-0301 |
出版年 | 2019 |
卷号 | 55期号:3页码:349-355 |
中文摘要 | 在群落调查的基础上,对阿拉善荒漠的植物进行了生活型划分,并将各生活型在各样地的盖度分别与地理和水热因子进行相关性分析,运用RDA(redundancy analysis)法分析了群落中各生活型的相对盖度在地理和水热因子梯度上的变化规律,并进一步使用偏RDA(partial RDA)分析统计了水热因子对群落生活型组成差异的解释量.结果表明:按照种数比例统计,阿拉善高原草本植物占优势(59.52%),按照盖度比例统计,木本植物占优势(67.43%);各生活型的盖度均与海拔呈正相关(显著或不显著),与纬度呈负相关,除肉质叶半灌木外,均与经度呈正相关;水热因子方面,各生活型的盖度均与降水因子呈正相关(显著或不显著),与最热季均温呈负相关;沿西北走向,干热程度增加,肉质叶灌木、肉质叶半灌木、退化叶灌木和退化叶常绿灌木这4种生活型在群落中的相对盖度有增大的趋势,其他生活型在群落中的相对盖度逐渐减小,说明这4种生活型对阿拉善高原西北地区干旱和高温的极端气候条件耐受性较其他生活型高;水热因子对不同群落生活型组成差异的解释量为21.430%,其中降水因子单独解释量为9.949%,温度因子为7.223%,二者共同解释量为4.258%. |
英文摘要 | In a field investigation on plant communities in Alxa Plateau,vascular plants were divided into ten life forms.Partial correlation analysis was applied to clarify latitudinal,longitudinal and altitudinal patterns of each life form.Pearsons correlation was used to evaluate relationships between each plant life form and hydrothermal factors.Redundancy analysis(RDA)revealed variations in life form composition in different communities,with gradient change in environmental factors.Partial RDA revealed influence of hydrothermal factors on varied life form compositions.The number of herbaceous species was found to be dominant at 59.52%,coverage by wood plants(shrub and subshrub)was found to be dominant at 67.43%.Correlation between life form coverage and geographical factors revealed that almost all plant types increased with decreasing latitude and increasing longitude and altitude.Correlation between life form coverage and hydrothermal factors revealed that almost all plant types increased with increasing precipitation(AP,PWQ) and decreasing mean temperature in warmest quarter(MTWQ).RDA analysis found that with increase in latitude,decrease in longitude and altitude,decrease in precipitation and increase in mean temperature of warmest quarter,relative coverage of leaves-succulent subshrub,leaves-succulent shrub,leaves-reduced shrub and leaves-reduced evergreen shrub all increased,but other life forms decreased.It is concluded that the four life forms were more tolerant to extreme climatic conditions of drought and high temperature than other types.Hydrothermal factors could explain 21.430%of the variation in life form composition in different communities,among which 9.949% was explained by precipitation factor alone,7.223%by temperature factor,and 4.258% by joint-effect. |
中文关键词 | 阿拉善高原 ; 生活型 ; 分布格局 |
英文关键词 | Alxa Plateau life form distribution pattern |
语种 | 中文 |
收录类别 | CSCD |
WOS类目 | PLANT SCIENCES |
WOS研究方向 | Plant Sciences |
CSCD记录号 | CSCD:6540800 |
来源机构 | 北京师范大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/316124 |
作者单位 | 北京师范大学生命科学学院, 生物多样性与生态工程教育部重点实验室, 北京 100875, 中国 |
推荐引用方式 GB/T 7714 | 闫瑞亚,娄安如,谢苏阳,等. 阿拉善高原荒漠植物生活型组成及其与水热因子的相关性[J]. 北京师范大学,2019,55(3):349-355. |
APA | 闫瑞亚,娄安如,谢苏阳,尹本丰,刘浪,&陆小亮.(2019).阿拉善高原荒漠植物生活型组成及其与水热因子的相关性.北京师范大学学报. 自然科学版,55(3),349-355. |
MLA | 闫瑞亚,et al."阿拉善高原荒漠植物生活型组成及其与水热因子的相关性".北京师范大学学报. 自然科学版 55.3(2019):349-355. |
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