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首页> 外文期刊>oecologia >Seasonal variation in the relationship between growth rate and phlorotannin production in the kelpEcklonia radiata
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Seasonal variation in the relationship between growth rate and phlorotannin production in the kelpEcklonia radiata

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摘要

Most theories for the evolution of plant chemical defences assume that defences are costly. In order to investigate the potential cost of phlorotannin production in the brown alga (kelp)Ecklonia radiata, I measured the correlation between changes in phlorotannin levels and growth rates forE. radiatain two seasons, spring and autumn. In spring, when both phlorotannin levels and growth rates inE. radiatawere highest, there was a significant negative relationship between changes in phlorotannin levels and growth, consistent with a cost of phlorotannin production. No relationship was evident in autumn, indicating that moderate levels of phlorotannins and growth could be maintained simultaneously. These and related results suggest that the cost of defence will vary as a function of (1) endogenous patterns of growth or metabolite production and (2) variation in available resources. Evidence for a cost of phlorotannins inE. radiataadds to the paradox of the maintenance of high levels of phlorotannins in Australasian brown algae.

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  • 来源
    《oecologia》 |1995年第2期|169-173|共页
  • 作者

    P.D.Steinberg;

  • 作者单位

    University of Sydney;

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  • 正文语种 英语
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