Global warming, as global problem, may particularly affect the vegetation of the Polar Regions. Biological soil crusts (BSCs) as pioneer communities perform a variety of important ecological functions under the harsh environmental conditions at high latitudes. The green algal genus Klebsormidium is a common member of BSCs and in the present study, the ecophysiological resilience to temperature stress of 20 strains from Arctic and Antarctica were investigated. All 20 Klebsormidium strains exhibited the capability to grow under a wide temperature range (from 6 to 28°C) and hence were characterized as psychrotolerant with optimum growth temperatures between 18°C and 26°C. Statistical analyses showed no significant differences in optimum growth temperature. However, growth rates at optimal temperatures varied between strains and indicated infraspecific physiological plasticity. Furthermore, correlation with the sampling sites as well as different BSC types were examined but no significance was confirmed. Our results revealed that Polar Klebsormidium strains are able to survive such changing conditions, and even benefit from higher environmental temperatures.

中文翻译：

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从北极和南极生物土壤地壳中分离的 Klebsormidium (Streptophyta) 菌株对温度的生态生理反应表明在全球变暖期间的生存

全球变暖作为全球性问题，可能特别影响极地地区的植被。生物土壤结皮（BSCs）作为先驱群落，在高纬度恶劣的环境条件下发挥着多种重要的生态功能。绿藻属 Klebsormidium 是 BSC 的常见成员，在本研究中，研究了来自北极和南极洲的 20 个菌株对温度胁迫的生态生理弹性。所有 20 种 Klebsormidium 菌株都表现出在较宽的温度范围（从 6 到 28°C）下生长的能力，因此具有耐寒性，最佳生长温度在 18°C 到 26°C 之间。统计分析显示最适生长温度没有显着差异。然而，最佳温度下的生长速率因菌株而异，并表明种下生理可塑性。此外，检查了与采样点以及不同 BSC 类型的相关性，但没有确认显着性。我们的研究结果表明，极地克雷伯菌菌株能够在这种不断变化的条件下生存，甚至可以从更高的环境温度中受益。