Among the bryophytes, biological growth rhythms have not yet been identified due to a lack of long-term precision observations. Here we carry out precision field monitoring of the growth of the peat moss Sphagnum riparium using the recent geotropic curvature method. For four years, using the observation intervals of 2-5 days, we measured 116 469 shoots and received 4 493 estimates of growth rates. We found three rhythmic growth components. The seasonal rhythm of growth has a period of about 180 days, which coincides with the seasonal temperature cycle. The circalunar growth rhythm has a period of about 29.5 days and coincides with the synodic lunar cycle. There is an acceleration near the new moon, and a slowdown in growth near the full moon. The third rhythm has a period of 7-16 days and is always synchronized with the circalunar growth rhythm. From the models of the sums of sinusoids, we found that the total contribution of all three rhythms to the growth rate is R2 = 0.51-0.78, and without taking into account the seasonal rhythm, R2 = 0.36-0.42. Thus, our study gives the first data on the biological rhythms and the contribution of these rhythms to the growth process of bryophytes. We attribute the unexpectedly high contribution of rhythms to the synchronous growth of the Sphagnum mat, which is necessary to reduce the loss of moisture. This article is protected by copyright. All rights reserved.

中文翻译：

---

泥炭藓的生长具有强烈的节律性：季节性、日圆和第三分量的贡献

在苔藓植物中，由于缺乏长期精确观察，尚未确定生物生长节律。在这里，我们使用最近的向地曲率方法对泥炭藓 Sphagnum riparium 的生长进行了精确的现场监测。四年来，使用 2-5 天的观察间隔，我们测量了 116 469 个芽并收到了 4 493 次增长率估计值。我们发现了三个有节奏的增长成分。生长的季节性节律周期约为 180 天，与季节温度周期相吻合。日圆生长节律的周期约为29.5天，与会合月相重合。在新月附近有一个加速，在满月附近增长放缓。第三节律周期为7-16天，始终与圆月生长节律同步。从正弦曲线和的模型中，我们发现所有三个节律对增长率的总贡献为 R2 = 0.51-0.78，并且不考虑季节性节律，R2 = 0.36-0.42。因此，我们的研究提供了关于生物节律和这些节律对苔藓植物生长过程的贡献的第一个数据。我们将节律的意外高贡献归因于泥炭藓垫的同步生长，这是减少水分流失所必需的。本文受版权保护。版权所有。我们的研究提供了关于生物节律以及这些节律对苔藓植物生长过程的贡献的第一批数据。我们将节律的意外高贡献归因于泥炭藓垫的同步生长，这是减少水分流失所必需的。本文受版权保护。版权所有。我们的研究提供了关于生物节律以及这些节律对苔藓植物生长过程的贡献的第一批数据。我们将节律的意外高贡献归因于泥炭藓垫的同步生长，这是减少水分流失所必需的。本文受版权保护。版权所有。