Biodiversity Science ›› 1999, Vol. 07 ›› Issue (2): 127-131.doi: 10.17520/biods.1999019

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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

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 .

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