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Measurement of moss growth in continental Antarctica

机译：南极大陆苔藓生长的测量

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Using steel pins inserted into growing moss colonies near Casey Station, Wilkes Land, continental Antarctica, we have measured the growth rate of three moss species: Bryum pseudotriquetrum and Schisti-dium antarctici over 20 years and Ceratodon purpureus over 10 years. This has provided the first long-term growth measurements for plants in Antarctica, confirming that moss shoots grow extremely slowly in Antarctica, elongating between 1 and 5 mm per year. Moss growth rates are dependent on availability of water. Antheridia were observed on some stems of B. pseudotriquetrum; no archegonia or sporophytes were observed. Stems bearing antheridia elongated much more slowly than vegetative stems in the same habitat. Two other methods of growth rate measurement were tested, and gave similar rates of elongation over shorter periods of time. However, for long-term measurements, the steel pin measurements proved remarkably reproducible and reliable.
机译：我们使用钢钉插入南极洲大陆Wilkes Land的Casey Station附近生长的青苔菌落中，测量了三种青苔物种的生长速率：20年的假单胞菌和南极血吸虫和10年的紫斑菊。这为南极洲的植物提供了首次长期生长测量，证实了苔藓芽在南极洲的生长极为缓慢，每年可长出1至5毫米。苔藓的生长速度取决于水的供应。在假三叉戟的某些茎上观察到了花粉缺乏；没有观察到古菌或孢子体。在同一生境中，带有花丝的茎的伸长比营养茎的伸长慢得多。测试了两种其他的生长速率测量方法，并在较短的时间内给出了相似的伸长率。但是，对于长期测量，钢销的测量结果证明是可重复且可靠的。

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