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首页> 外文期刊>Phycological Research >Temperature requirements for growth and maturation of the warm temperate kelp Eckloniopsis radicosa (Laminariales, Phaeophyta)
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Temperature requirements for growth and maturation of the warm temperate kelp Eckloniopsis radicosa (Laminariales, Phaeophyta)

机译：温带海带Eckloniopsis radicosa（Laminariales，Phaeophyta）生长和成熟的温度要求

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摘要

The annual kelp Eckloniopsis radicosa is distributed along Japanese coasts and occurs within the area with a February isotherm ranging 15-18 degrees C and August isotherm ranging 25-28 degrees C. In this study, the effects of temperature on the gametophyte growth and maturation, and the young sporophyte growth of E. radicosa were examined and the results are discussed in relation to the distribution of other warm-adapted kelp species and the potential effects of climate change. The optimal temperature ranges for growth of male and female gametophytes were 23-27 degrees C and 20-26 degrees C, respectively. The upper survival temperature for gametophyte growth was 31 degrees C for males and 30 degrees C for females, respectively. The optimal temperature range for maturation of female gametophytes was 23 degrees C. The optimal temperature range for growth of young sporophytes was 14-22 degrees C. It was clarified that E.radicosa has the most warm-adapted characteristics for growth and maturation of gametophytes among members of the Laminariales studied so far. The natural seawater temperature ranges during the growth and maturation seasons for gametophytes of E.radicosa, as well as the growth season for young sporophytes near to the northern and southern distribution limits (Izu-Oshima: 14.9-24.5 degrees C, Ichiki-kushikino: 17.1-29.6 degrees C), agreed with the experimentally determined temperature requirements. The warm-adapted gametophyte stage and annual lifecycle are major factors enabling survival of E.radicosa in warm waters near tropical regions along the Japanese coast.
机译：一年生海带Eckloniopsis radicosa分布在日本沿海，发生在2月等温线介于15-18摄氏度和8月等温线介于25-28摄氏度的区域内。在这项研究中，温度对配子体生长和成熟的影响，并研究了萝卜小孢子体的幼小孢子体生长，并讨论了与其他温暖适应的海带种类的分布以及气候变化的潜在影响有关的结果。雄配子体和雌配子体生长的最佳温度范围分别是23-27摄氏度和20-26摄氏度。雄配子体生长的最高存活温度分别为雄性31℃和雌性30℃。雌配子体成熟的最佳温度范围为23摄氏度。幼子孢子体生长的最佳温度范围为14-22摄氏度。已明确，大黄E对配子体的生长和成熟具有最温暖的适应性。迄今为止研究的海带成员中。放射线虫配子体的生长和成熟季节以及靠近北部和南部分布极限的幼小孢子体的生长季节的天然海水温度范围（伊豆大岛：14.9-24.5摄氏度，一木久志野： 17.1-29.6摄氏度），符合实验确定的温度要求。适应气候变化的配子体阶段和年度生命周期是使赤E能够在日本沿海热带地区附近的温暖水中生存的主要因素。

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