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Comparisons of photosynthesis-related traits among understory lichens, mosses, and vascular plant leaves in a high-elevation subalpine forest
Journal of Plant Ecology ( IF 2.7 ) Pub Date : 2021-09-25 , DOI: 10.1093/jpe/rtab109
Zhe Wang 1, 2 , Xin Liu 2 , Zhangming Zhu 3 , Wenzhang Ma 4 , Weikai Bao 2
Affiliation  

Abstract
Many mosses and lichens thrive in high-elevation subalpine forests and even become dominant species on the forest floor. Although they play an irreplaceable ecological role in the forest, less is known about their eco-physiological status, and how their photosynthesis-related functional traits differ from those of co-occurring vascular plants. We determined the carbon, nitrogen, and phosphorus concentrations and stoichiometric ratios, tissue mass per area, chlorophyll concentrations, and photosynthetic light-response curves of three lichens, three mosses, and four vascular plants in a subalpine forest in the eastern Tibetan Plateau of China. Trait values were compared among and within each group. The lichens possessed a higher nitrogen concentration than that of mosses. In addition, the two poikilohydric groups exhibited lower concentrations of nitrogen, phosphorus, and chlorophyll, light-saturated assimilation rates, and photosynthetic nutrient use efficiencies, and higher light compensation points than those of vascular plant leaves. Furthermore, variations in photosynthesis-related traits for lichen species reflect their different adaptation strategies to their corresponding environments. In contrast, the differences were weak among the three forest-floor mosses and the three herb species. These results demonstrate that the high abundance of understory lichens and mosses in the high-elevation subalpine forest cannot be explained by the photosynthesis-related traits.
更新日期:2021-09-27
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