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信阳桃花水母对几种生态因子胁迫的耐受反应

王丹丽1;徐善良1;蒋宏雷2;杨华1   

  1. 1宁波大学生命科学与生物工程学院,宁波 315211;2宁波市海洋与渔业研究院,宁波 315010
  • 收稿日期:2005-11-12 修回日期:2006-03-30 出版日期:2006-06-18 发布日期:2006-06-18

Tolerance of Craspedacusta sowerbyi xinyangensis to the stresses of some ecological factors

WANG Danli1;XU Shanliang1;JIANG Honglei2;YANG Hua1   

  1. 1College of Life Science and Biotechnology, Ningbo University, Ningbo 3
    15211, China; 2Ningbo Academy of Ocean and Fishery, Ningbo 315010, China
  • Received:2005-11-12 Revised:2006-03-30 Online:2006-06-18 Published:2006-06-18

摘要: 在不同温度、盐度、pH等因子胁迫条件下,研究观察了信阳桃花水母(Craspedacusta sowerbyi xinyangensis)的生活状态、形态变化及存活等耐受反应,并测定了信阳桃花水母在不同温度下的耗氧率和最低耐氧能力.结果表明,信阳桃花水母的最适生活温度范围为15 ℃~25 ℃,pH为6.0~8.2.信阳桃花水母对盐度耐受力差,盐度为2时,仅能存活96 h;但具有较强的耐低氧能力,20 ℃时窒息点为026 mg·L-1,平均耗氧量和平均耗氧率随温度的升高而升高.

关键词: 白桦, 日阴菅, 生态位宽度, 生态位重叠, 生态位移动

Abstract: This paper studied the tolerance of Craspedacusta sowerbyi xinyangensis to the stresses of temperature, salinity, and pH from the aspects of its living status, morphology and survival, and measured its oxygen consumption rate and oxygen tolerance at different temperatures. The results indicated that the suitable temperature and pH of C. sowerbyi xinyangensis were 15 ℃~25 ℃ and 6.0~8.2, respectively. C. sowerbyi xinyangensi had a low tolerance to salinity, and it could only survive for 96 h when the salinity was 2. C. sowerbyi xinyangensi could bear low DO, and its lethal DO was 0.26 mg·L-1 at 20 ℃. The average oxygen consumption amount and rate of C. sowerbyi xinyangensi increased with increasing temperature.

Key words: Betula platyphylla, Carex pediformis, Niche breadth, Niche overlap, Niche shift