生物多样性 ›› 1999, Vol. 07 ›› Issue (2): 127-131.DOI: 10.17520/biods.1999019

• 论文 • 上一篇    下一篇

杭州石荠苎(Mosla hangchowensis)种群密度制约实验的统计分析

陆大根,葛滢,常杰,黄承才   

  1. 1  ( 杭州大学生命科学学院,  杭州 310012)
    2  ( 绍兴文理学院,  绍兴 312000)
  • 收稿日期:1998-01-15 修回日期:1998-04-30 出版日期:1999-05-20 发布日期:1999-05-20

The effects of population density on the mortality , growth and reproduction in Mosla hangchowensis

LU Da-Gen1),GE Ying1),CHANG Jie1),HUANG Cheng-Cai2)   

  1. 1) College of Life Science ,Hangzhou University , Hangzhou 310012
    2) Shaoxing Science and Art College , Shaoxing 312000
  • Received:1998-01-15 Revised:1998-04-30 Online:1999-05-20 Published:1999-05-20

摘要:

本文研究了我国特有、分布区极狭窄的一年生草本植物——杭州石荠苎(Mosla  hangchowensis)种群的密度制约规律。结果表明:在生长季内,种群的死亡率与密度密切相关。种群的最适密度为200~1000株/m2左右。不同密度种群的平均株高、开花数等性状随时间的动态关系均符合“logistic”模型。高密度种群中60%左右的个体能完成生活史;低密度种群中80%以上的个体能完成生活史。种群密度较高制约杭州石荠苎的植株形态和繁殖投资。

Abstract: The effects of population density of Mosla hangchowensis was studied. The results showed : (1) In the growing season , its mortality rate depended on its population density of M. hangchowensis. The optimal density of M. hangchowensis was 200~1000 individuals/ m2 . (2) The relationships of the plant height or number of flowers bloomed and the dates fitted the Logistic function. (3) In the growing season ,about 60 % of individuals at a high density can complete their life cycle , whereas , 85 % at a low density can do. Most of morphological and reproductive traits were density dependent .