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首页> 外文期刊>The New Phytologist >Seasonal partitioning of growth into biomass and area expansion in a cephalolichen and a cyanolichen of the old forest genus Lobaria
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Seasonal partitioning of growth into biomass and area expansion in a cephalolichen and a cyanolichen of the old forest genus Lobaria

机译：老森林属罗布里亚（Lobaria）的头孢类和氰味类植物的生长季节性分配为生物量和面积扩大

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摘要

Growth in two old forest lichens was studied to evaluate how temporal (seasonal) and spatial (aspect-wise) partitioning of biomass and area growth respond to seasonal changes in light and climate. We monitored relative growth rates during annual courses in the cephalolichen Lobaria puimonaria and the cyanolichen Lobaria scrobiculata transplanted in boreal clear-cut to five fixed aspects in winter, spring, summer, and autumn. For each annual set, growth was quantified in January-March, April-June, July-September and October-December. Mean biomass and area increased in all seasons, but growth was highest in July-September. Mass growth did not follow area increment during a year. As a result, mass per area (specific thallus mass (STM)) declined (L scrobiculata) or stayed constant (L puimonaria) in the dark, humid October-December season, whereas it strongly increased in the dry, sunny April-June season. Aspect influenced growth in species-specific ways. Seasonality in biomass growth mainly followed light availability, whereas area growth was strongest during humid seasons. The substantial STM changes across seasons, species, and aspects can be explained as passive responses to seasonal climate. However, as STM, according to the literature, is a driver of water storage, recorded changes probably improve fitness by prolonging hydration in places or during times with high evaporative demands.
机译：研究了两个老森林地衣的生长情况，以评估生物量的时间（季节）和空间（方面）分配以及区域生长如何响应光照和气候的季节性变化。我们在冬季，春季，夏季和秋季以北方固定方式向五个固定方面移植的头孢霉菌小叶锦紫苏和矢车菊小球藻的年度课程中监测了相对增长率。对于每个年度集，在1月-3月，4月-6月，7月-9月和10月-12月量化增长。平均生物量和面积在所有季节均增加，但在7月至9月增长最快。在一年中，质量增长并未跟随面积的增加。结果，在黑暗潮湿的10月至12月季节中，单位面积质量（特定all体质量（STM））下降（Scrobiculata）或保持恒定（L puimonaria），而在干燥，阳光充足的4月至6月季节中，其单位面积质量显着增加。 。方面以物种特定的方式影响了生长。生物量增长的季节性主要取决于光的可利用性，而在潮湿季节，面积增长最强。 STM在各个季节，物种和方面的巨大变化可以解释为对季节性气候的被动响应。但是，由于STM（根据文献）是蓄水的动力，因此记录的变化可能会通过延长局部或高蒸发需求时间的水合作用来提高适应性。

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