红树林生境中互花米草气孔导度的动态变化

生态学杂志 ›› 2009, Vol. 28 ›› Issue (10): 1991-1995.

红树林生境中互花米草气孔导度的动态变化

覃盈盈 ;甘肖梅 ;蒋潇潇 ;李军伟 ;韦锋 ; 梁士楚^**

广西师范大学生命科学学院,广西桂林 541004

出版日期:2009-11-10 发布日期:2009-11-10

Dynamics in leaf stomatal conductance of Spartina alterniflora in mangrove habitats.

QIN Ying-ying;GAN Xiao-mei;JIANG Xiao-xiao;LI Jun-wei;WE ;Feng;LIANG Shi-chu⁺⁺

College of Life Science, Guangxi Normal University, Guilin 541004, Guangxi, China

Online:2009-11-10 Published:2009-11-10

摘要/Abstract

摘要： 以生长在山口红树林保护区内壤质海滩上的互花米草(Spartina alterniflora)为对象，对午间退潮到天黑这一特定时间段其叶片气孔导度及相应环境因子的变化进行了测定和分析。结果表明：互花米草不同叶位的叶片气孔导度不同，在垂直方向上，其排序大致呈现中上部>顶部>中下部>下部的趋势；叶片气孔导度与光强、叶温呈幂函数关系，与时间、相对湿度呈负指数函数关系；在相对湿度为50%～60%时，气孔导度最大，随着湿度的增加，气孔有关闭的趋势，气孔导度变小；互花米草植株中部的叶片对整个植株光合产物积累的贡献较大。各种环境因子对互花米草气孔的开闭存在交互作用，因此，互花米草叶片的气孔导度是对环境因子的综合反应。

关键词: 雪灾危害指数, 遥感监测, 雪灾评价

Abstract: The study on the dynamic changes in the leaf stomatal conductance of invasive plant Spartina alterniflora in loamy mangrove habitat from noon (ebbtide) to evening and the relevant environmental factors showed that the leaf stomatal conductance of S. alterniflorawas in the order of upper part > top > lowermid part > lower part, and had a power function relationship with light intensity and leaf temperature but a negative exponential function relationship with time and relative humidity. It was the greatest at 50%-60% relative humidity, and became smaller with the further increase of the humidity. The midpart leaves had the greatest contribution to the accumulation of photosynthates. There existed interactions among diverse environmental factors on the stomatal opening and closure, and thus, the leaf stomatal conductance of S. alterniflora could be viewed as a comprehensive response to environmental parameters.

Key words: Snow hazard index, Remote sensing monitoring, Snow disaster evaluation

覃盈盈 ;甘肖梅 ;蒋潇潇 ;李军伟 ;韦锋;梁士楚. 红树林生境中互花米草气孔导度的动态变化[J]. 生态学杂志, 2009, 28(10): 1991-1995.

QIN Ying-ying;GAN Xiao-mei|JIANG Xiao-xiao|LI Jun-wei;WEI Feng;LIANG Shi-chu. Dynamics in leaf stomatal conductance of Spartina alterniflora in mangrove habitats.[J]. cje, 2009, 28(10): 1991-1995.