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首页> 外文期刊>Plant and Soil >Clear-cutting impacts nutrient, carbon and water exchange parameters in woody plants in an east Fennoscandian pine forest
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Clear-cutting impacts nutrient, carbon and water exchange parameters in woody plants in an east Fennoscandian pine forest

机译：皆伐影响东芬诺斯堪迪斯堪迪亚松林木本植物的养分、碳和水分交换参数

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Background and aims Clear-cut logging currently is a key factor transforming forest communities in many boreal regions. The dynamics of biogeochemical processes taking place in clear-cuts makes them a good model for studying the response of plants to changes in environmental conditions. This study aimed to assess the response of nutrient, carbon and water exchange parameters in coniferous and deciduous plants after clear-cut forest harvesting. Methods The effects of environmental factors on the functional traits of regrowing trees in Scots pine (Pinus sylvestris L.), silver birch (Betula pendula Roth), aspen (Populus tremula L.) and grey alder (Alnus incana (L.) Moench) were analysed during four growing seasons (2016-2019) in a clear-cut site and under the canopy of an undisturbed bilberry-type pine forest in the middle taiga of Karelia, Northwest Russia. Results Unidirectional changes were observed in the specific nutrient content, specific leaf area, biological macronutrient absorption capacity, stomatal conductance, and rates of photosynthesis and transpiration in the different tree species along a gradient of environmental factors. In most cases, the nutrient concentrations and N:P:K ratio were consistent in all species as environmental conditions changed. Species-specific responses were observed for the N:P:K and K:Ca:Mg ratios, photosynthetic water use and nitrogen use efficiency. Contrasting environmental conditions in the clear-cut and under forest canopy most significantly affect plant capacity to absorb nitrogen. Conclusions Variation in functional traits in the coniferous and deciduous species reflects their specific resource-use strategies in a heterogeneous environment and, hence, indicates the different adaptation potentials for various plant species.
机译：背景和目标 目前，砍伐伐木是改变许多北方地区森林群落的关键因素。在砍伐中发生的生物地球化学过程的动力学使它们成为研究植物对环境条件变化的响应的良好模型。本研究旨在评估皆伐林后针叶落叶植物养分、碳交换和水分交换参数的响应。方法 在卡累利阿针叶林中部针叶林中叶林的开垦地和树冠下，分析环境因子对苏格兰松（Pinus sylvestris L.）、银桦（Betula pendula Roth）、白杨（Populus tremula L.）和灰桤木（Alnus incana （L.） Moench）树木再生功能性状的影响， 俄罗斯西北部。结果 不同树种的比养分含量、比叶面积、生物常量养分吸收能力、气孔导度、光合作用和蒸腾速率沿环境因子梯度发生单向变化。在大多数情况下，随着环境条件的变化，所有物种的养分浓度和N：P：K比值是一致的。对N：P：K和K：Ca：Mg比值、光合水分利用和氮利用效率均有物种特异性响应。在砍伐和林冠下形成鲜明对比的环境条件对植物吸收氮的能力影响最大。结论 针叶树种和落叶树种功能性状的差异反映了它们在异质环境中的特定资源利用策略，从而表明了不同植物物种的不同适应潜力。

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