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首页> 外文期刊>Revista Brasileira de Farmacognosia >Phenology of an agarophyte Gracilaria birdiae Plastino and E.C. Oliveira (Gracilariales, Rhodophyta) in Northeastern Brazil
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Phenology of an agarophyte Gracilaria birdiae Plastino and E.C. Oliveira (Gracilariales, Rhodophyta) in Northeastern Brazil

机译：巴西东北部琼脂菌Gracilaria birdiae Plastino和E.C. Oliveira（Gracilariales，Rhodophyta）的物候学

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摘要

The reproductive phenology and thallus length of Gracilaria birdiae were studied over a period of 12 months in a natural bed in Northeastern Brazil. Fertile specimens of G. birdiae were observed during the entire study period. Tetrasporophytes were the most common with an annual mean of 80.1?±5.6%, followed by cystocarpic plants (9.3?±3.4%), male gametophytes (8.3?±3.6%) and infertile plants (2.2?±3.4%). Only male gametophytes and infertile plants showed a variation in occurrence frequency during the year (p0.05). With respect to thallus length, a distinct seasonal variation was observed for all reproductive stages (p0.05), with the highest values recorded during the rainy season (March to August) and the lowest in the dry season (September to February). The results demonstrate that the size of individuals in this population is significantly affected by the periodic changes in the environment caused by rainfall regimes and hydrodynamism.
机译：在巴西东北部的自然床中研究了12个月内河豚草的生殖物候和ology体长度。在整个研究期间都观察到了可育的小鸟G.标本。四孢子植物是最常见的，年平均为80.1％±5.6％，其次是囊果类植物（9.3％±3.4％），雄配子体（8.3％±3.6％）和不育植物（2.2％±3.4％）。在这一年中，只有雄配子体和不育植物显示出发生频率的变化（p <0.05）。关于th体长度，在所有生殖阶段均观察到明显的季节变化（p <0.05），在雨季（3月至8月）记录的最大值，而在旱季（9月至2月）记录的最小值。结果表明，该群体中个体的大小受到降雨制度和水动力作用引起的环境周期性变化的显着影响。

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