The green tide-forming macroalga Ulva linza outcompetes the red macroalga Gracilaria lemaneiformis via allelopathy and fast nutrients uptake

文献类型： 外文期刊

第一作者： Gao, Zhengquan

作者： Gao, Zhengquan;Meng, Chunxiao;Xu, Dong;Zhang, Xiaowen;Zou, Jian;Zhuang, Zhimeng;Ye, Naihao;Wang, Yitao;Li, Demao

作者机构：

关键词： Allelopathy;Biodiversity;Competitions;Gracilaria lemaneiformis;Green tide;Ulva linza

期刊名称：AQUATIC ECOLOGY （ 影响因子：1.641； 五年影响因子：2.796 ）

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收录情况： SCI

摘要： The objective of this study was to evaluate the interactions between green tide-forming macroalgae Ulva linza and red macroalgae Gracilaria lemaneiformis in the laboratory. The results demonstrated that the presence of U. linza can restrict growth (9-31 %) and photosynthesis (25-85 %) of G. lemaneiformis. In contrast, G. lemaneiformis had little apparent effect on the growth of U. linza. Culture medium experiments confirmed that allelochemicals may be released by both the tested macroalgae. The causative mechanism for the growth and photosynthesis inhibition of G. lemaneiformis was not light limitation nor increase of pH, but a combination of allelopathic effects of U. linza and nutrient competition between the two macroalgae. Moreover, the "green tide" macroalga U. linza was a stronger competitor for nutrient than G. lemaneiformis. The results from this study provide evidence for the mechanisms of "green tide" formation by U. linza: potent allelopathic effects on G. lemaneiformis and faster nutrients uptake than its competitors.

分类号： Q17

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