• 研究报告 •

### 高寒草地狼毒种群繁殖分配对海拔的响应

1. (西北师范大学地理与环境科学学院， 甘肃省湿地资源保护与产业发展工程研究中心， 兰州 730070)
• 出版日期:2013-02-10 发布日期:2013-02-10

### Response of reproductive allocation of Stellera chamaejasme population in alpine grassland to altitude.

ZHANG Qian, ZHAO Cheng-zhang**, MA Xiao-li, HOU Zhao-jiang, LI Yu

1. (Research Center of Wetland Resources Protection and Industrial Development Engineering of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, China)
• Online:2013-02-10 Published:2013-02-10

Abstract: Reproduction has a very close relationship with species survival and development, and is the core in the study of plant life history. The environmental factors under the restriction by altitude have significant effects on the reproductive allocation of plants. In July 2010, a quadrat
investigation was conducted to study the characteristics of the reproductive allocation of S. chamaejasme population at four altitudes with a gradient from 2700 m to 3000 m. With the increasing altitude, the aboveground biomass of S. chamaejasme presented a decreasing trend, but the total flower biomass and the plant height increased after an initial decrease, and the reproductive allocation had an increasing trend. Along the altitude gradient, the reproductive allocation had a significant negative correlation with the total aboveground biomass (except at altitude 2800 m), but less correlation with the plant height (except at altitude 3000 m). The reproductive allocation of S. chamaejasme population was limited by plant body size, and the limitation by total aboveground biomass was far larger than the limitation by plant height, indicating that with the increasing altitude, S. chamaejasme population could ensure its reproductive success via reducing the plant body size to decrease the resource consumption and increasing the allocation of the obtained limited resources to flower biomass.