Lichens and Bryophytes: Habitats and Species
Lichens and Bryophytes: Habitats and Species
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DOI：
10.1007/978-3-642-19106-0_5
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发表时间：
2011-01-01
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影响因子：
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通讯作者：
Lakatos, Michael
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文献类型：
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作者：
Lakatos, Michael
异水性干燥耐受性使地衣和苔藓植物能够在长期缺水的情况下生存，并通过补水快速恢复。这一策略在进化上的成功体现在以下事实：隐花几乎栖息在从热带到寒冷和炎热沙漠的所有陆地栖息地。作为生态系统的组成部分，地衣和苔藓植物可能通过频繁的干燥-再湿润循环对周围环境产生重大影响。在许多微场所和栖息地中，成功与维管植物竞争的机制和功能有何差异？本章回顾了隐花植物耐干燥性的关键问题，重点讨论了以下几个方面：（1）水交换机制和过程的比较。 (2) 微尺度通量的功能和影响，以说明干燥-再润湿循环对环境的影响。 (3) 地衣和苔藓植物的全球模式作为其生态相关性的指示。
Poikilohydric desiccation tolerance enables lichens and bryophytes to survive long periods of water limitation and to recover quickly by rehydration. The evolutionary success of this strategy is reflected by the fact that cryptogams inhabit almost all terrestrial habitats from the tropics to cold and hot deserts. As ecosystem components, lichens and bryophytes may considerably impact the surrounding environment through frequent desiccation–rewetting cycles. What are the differences in mechanism and functioning to successfully compete with vascular plants in many micro-sites and habitats? This chapter reviews key issues of cryptogamic desiccation tolerance with particular emphasis on the following aspects: (1) Comparison of mechanisms and processes of water exchange. (2) Function and impacts of micro-scale fluxes to illustrate the effects of desiccation–rewetting cycles on the environment. (3) Global patterns of lichens and bryophytes as an indication for their ecological relevance.