ABSTRACT

Introduction

Bryophyte diaspore banks are a critical aspect of the life strategy of some species yet remain neglected and poorly understood. This study investigated the longevity in natural habitat of the diaspore bank of Physcomitrium eurystomum Sendtn., a moss species that is threatened with extinction in Europe.

Methods

Undisturbed soil cores of 40 cm depth were collected from Langmere, Norfolk, UK, and were split into investigated sediment layers of 1 cm depth. Dating of sediment layers was done by an analysis of radionuclides, and diaspore germination trials of each layer were carried out in a growth chamber. DNA barcoding was used to help identify plants that germinated.

Key results and conclusions

Viable diaspores of Physcomitrium eurystomum frequently occurred in sediment layers that were at least 100 years old and continued to occur in much lower layers that were probably several hundred years old. The long-term survival of bryophytes underground can have important implications for conservation decisions.

中文翻译：

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地下苔藓植物的长期生存：对 Physcomitrium eurystomum Sendtn 的硬水铝石库的调查。

摘要

介绍

苔藓植物硬水铝石库是某些物种生命策略的一个重要方面，但仍被忽视且知之甚少。本研究调查了Physcomitrium eurystomum Sendtn. 的硬水铝石库在自然栖息地的寿命，这是一种在欧洲濒临灭绝的苔藓物种。

方法

从英国诺福克郡的朗米尔收集了 40 厘米深的未受干扰的土芯，并将其分成 1 厘米深的调查沉积层。沉积层的年代测定是通过放射性核素分析完成的，每层的硬水铝石发芽试验都是在生长室中进行的。DNA 条形码用于帮助识别发芽的植物。

主要结果和结论

Physcomitrium eurystomum的活性水硬石经常出现在至少有 100 年历史的沉积层中，并继续出现在可能有数百年历史的低得多的层中。地下苔藓植物的长期生存对保护决策具有重要意义。