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Role of environmental filtering and seed source availability in natural regeneration processes following large-scale disturbances in mountain forests
European Journal of Forest Research ( IF 2.6 ) Pub Date : 2021-03-12 , DOI: 10.1007/s10342-021-01371-2
Jerzy Szwagrzyk , Anna Gazda , Tomasz Zwijacz-Kozica , Antoni Zięba , Barbara Ciesielska , Janusz Szewczyk , Kacper Foremnik , Elżbieta Muter , Jan Bodziarczyk

The relative importance of environmental factors and species pool in natural regeneration processes is still intensively disputed. Is environmental filtering especially important for species with higher requirements for temperature and soil fertility? Is the seed source limitation especially pronounced among tree species with lower dispersal abilities? Trees, seedlings and saplings measurements were conducted in 600 plots of 0.05 ha distributed in a regular grid in the Tatra Mountains (elevation range 817–1797 m a.s.l.). Boosted regression trees were used to analyse the relationships between the numbers of young trees, factors acting as environmental filters and the potential seed source availability. The most important factor affecting the distribution of young trees of most species was elevation; bedrock type was the second most important factor for Acer pseudoplatanus, while potential solar radiation was important for Sorbus aucuparia. The relationship between the presence of mature trees and abundance of young ones was strong in Fagus sylvatica, moderately strong in A. pseudoplatanus, and weak in Picea abies, Abies alba and S. aucuparia. The role of environmental factors in shaping the abundance of young trees varies strongly among species, while the seed source availability is very important for large-seeded trees.



中文翻译:

山区森林受到大规模干扰后,环境过滤和种子来源的可用性在自然更新过程中的作用

在自然再生过程中,环境因素和物种库的相对重要性仍然存在争议。对于对温度和土壤肥力有更高要求的物种,环境过滤是否特别重要?在传播能力较低的树种中,种子来源的限制是否特别明显?在塔特拉山的常规网格中(海拔范围817–1797 m asl),在600块0.05公顷的规则网格中进行树木,幼苗和幼树的测量。使用增强回归树来分析幼树数量,充当环境过滤器的因素与潜在种子源可用性之间的关系。影响大多数树种幼树分布的最重要因素是海拔。Acer pseudoplatanus,而潜在的太阳辐射对山uc很重要。在青冈中,成熟树木的存在与幼年树木的存在之间的关系很强,铂金丝猴中的强度很强云杉,冷杉,冷杉圆叶葡萄球菌的强度则很弱。在各种树种中,环境因素在塑造幼树丰富度方面的作用差异很大,而种子来源的可用性对于大种子树木非常重要。

更新日期:2021-03-12
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