Growth and nutrient uptake capacity of two co-occurring species, Ulva prolifera and Ulva linza

文献类型： 外文期刊

第一作者： Liu, Feng

作者： Liu, Feng;Luo, Min Bo;Xu, Zhao Li

作者机构：

关键词： Green tides;Nutrient uptake;Eutrophication;Ulva prolifera;Ulva linza;Macroalgal bloom

期刊名称：AQUATIC BOTANY （ 影响因子：2.473； 五年影响因子：2.417 ）

ISSN： 0304-3770

年卷期： 2012 年 100 卷

页码：

收录情况： SCI

摘要： This study was designed to evaluate interspecific physiological differences in growth and nutrient uptake of two co-occurring species, Viva prolifera and Viva linza, in laboratory conditions. Growth-testing results showed that U. prolifera grew faster than U. linza in a range of temperature (8-30 degrees C) and irradiance (50-500 mu mol photon m(-2) s(-1)). Nitrate (NO3-) and ammonium (NH4+) enrichment had far more effect on growth of U. prolifera (max. 13.1 and 16.9% d(-1)) than on U. linza (max. 9.8 and 11.6% d(-1)). The V-max values of NO3- and NH4+ uptake by U. prolifera (124.25 and 284.60 mu mol g(-1) DM h(-1)) were higher than those by U. linza (109.13 and 250.25 mu mol g(-1) DM h(-1)), and the K-s values for U. prolifera were much lower than those for U. linza during the 3-h testing period. Significant difference in the V-max/K-s values indicated that U. prolifera had an apparent competitive advantage over U. linza to uptake and stock nitrogen (NO3- and NH4+) from the water column. There was no distinct difference in phosphate uptake between the two species. The results of this investigation revealed that distinct interspecific physiological traits in growth and nutrient uptake might be key factors to determine the species dominance patterns in green tides in the Yellow Sea. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

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