平原湖区外来入侵植物一年蓬群落的生态位特征  

Niche Characteristics of Alien Invasive Plant Erigeron annuus Community in Plain Lake Area

作　　者：郑丹妮 朱凌寒 王浩森 南倩茹 周文吉 赵丽娅[1] 

机构地区：[1]湖北大学资源环境学院,湖北 武汉

出　　处：《植物学研究》2024年第6期545-552,共8页Botanical Research

摘　　要：为了解一年蓬植物群落的生态关系,探究一年蓬入侵机制及危害,在平原湖区开展了以一年蓬为主的群落调查,计算了一年蓬及25种主要伴生植物的生态位宽度、生态位重叠及Spearman秩相关系数。结果表明:1) 一年蓬(Erigeron annuus)生态位宽度最大(0.948),其次是小蓬草(Erigeron canadensis)、狗牙根(Cynodon dactylon)和稗(Echinochloa crus-galli)分别为0.876、0.776和0.773;2) 一年蓬与主要伴生植物的Pianka生态位重叠指数介于0.107~0.524之间,与一年蓬生态位重叠度最高的是小蓬草(0.523);3) 一年蓬与25种主要伴生植物之间存在17个种对的负相关和8个种对的正相关,表明在以一年蓬为主的植物群落中,伴生植物与其多表现为竞争关系。In order to understand the ecological relationship of Erigeron annuus plant community and explore the invasion mechanism and its harmfulness, a community survey was investigated in plain lake area, and the niche breadth, niche overlap and Spearman rank correlation coefficient of Erigeron annuus and its 25 main accompanying plants were measured. The results showed that 1) Erigeron annuus had the widest niche width (0.948), while Erigeron canadensis (0.876), Cynodon dactylon (0.776) and Echinochloa crus-galli (0.773) had relatively wide niche widths. 2) Pianka niche overlap index of Erigeron annuus and its main companion plants is between 0.107 and 0.524, and the highest niche overlap with Erigeron annuus is Erigeron canadensis (0.523). 3) There are 17 species pairs of negative correlation and 8 species pairs of positive correlation between Erigeron annuus and 25 main associated plants, which indicates that in the plant community dominated by Erigeron annuus, the associated plants are mostly competitive with them.

关 键 词：一年蓬 生态位宽度 生态位重叠 Spearman秩相关系数 

分 类 号：Q94[生物学—植物学]