Acclimation of bloom-forming and perennial seaweeds to elevated pCO(2) conserved across levels of environmental complexity

文献类型： 外文期刊

第一作者： Xu, Dong

作者： Xu, Dong;Lin, Fan;Zhang, Xiao W.;Fan, Xiao;Teng, Lin H.;Wang, Yi T.;Zhuang, Zhi M.;Ye, Naihao;Xu, Dong;Ye, Naihao;Schaum, Charlotte-Elisa;Sun, Ke;Sun, Ke;Munroe, James R.

作者机构：

关键词： acclimation;CO2;environmental complexity;growth;photosynthesis;respiration;seaweed

期刊名称：GLOBAL CHANGE BIOLOGY （ 影响因子：10.863； 五年影响因子：11.716 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Macroalgae contribute approximately 15% of the primary productivity in coastal marine ecosystems, fix up to 27.4 Tg of carbon per year, and provide important structural components for life in coastal waters. Despite this ecological and commercial importance, direct measurements and comparisons of the short-term responses to elevated pCO(2) in seaweeds with different life-history strategies are scarce. Here, we cultured several seaweed species (bloom forming/nonbloom forming/perennial/annual) in the laboratory, in tanks in an indoor mesocosm facility, and in coastal mesocosms under pCO(2) levels ranging from 400 to 2,000 mu atm. We find that, across all scales of the experimental setup, ephemeral species of the genus Ulva increase their photosynthesis and growth rates in response to elevated pCO(2) the most, whereas longer-lived perennial species show a smaller increase or a decrease. These differences in short-term growth and photosynthesis rates are likely to give bloom-forming green seaweeds a competitive advantage in mixed communities, and our results thus suggest that coastal seaweed assemblages in eutrophic waters may undergo an initial shift toward communities dominated by bloom-forming, short-lived seaweeds.

分类号： S9

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