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Key message <p>The relict tree species <i>Juniperus drupacea</i> found to form in its populations in Europe, un-evened young stands of one-storey, with low tree height, and diameter growth pattern similar to other trees.</p> Abstract <p><i>Juniperus drupacea</i> Labill. is a relict tree species distributed in west Asia (Turkey, Syria, Lebanon and Israel), while in Europe it is only found in southern Greece, Peloponnese. It appears in patches and its habitat, in many cases, appeared fragmented. This study aims to provide a detailed account of the forest stand structure of <i>J. drupacea</i> in the two unique populations of Europe, on Mount Parnon, south Greece, along with a comprehensive analysis of the species’ growth pattern based on tree-ring analysis. The results analysis indicated that <i>J. drupacea</i> within two populations (northern and southern - at local scale) comprises uneven aged stands, which probably were established progressively in successive waves. The majority of the sampled trees are between 30 and 60 years old, while there are some individuals elder or younger. However, only a few individuals exceed 60 years of age, clearly suggesting that stand establishment occurred predominantly after 1960. This variation in age does not lead to significant differences in height, as most plots exhibit a single-storey stand with only minor fluctuations in tree height; in most plots, trees are ranging between 4 and 8&#xa0;m in height, while a small proportion of trees in some north and south plots reach greater heights, up to 10&#xa0;m. These findings confirm that the species is morphologically characterized as a small tree, which reaches at a height up to 12&#xa0;m in the mature stage (100–120 years old). Annual pattern growth shows that this depends on the tree age classes, and it is significantly higher in the trees of northern population origin. Special silvicultural measures, e.g. stand tending aiming at favoring the best trees, by removing their most competitive individual, are suggested for improving species populations’ conservation.</p>

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Tree growth pattern in relation to the forest stand structure and the age of the relict endangered species Juniperus drupacea Labill.: preliminary study

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • M. Mparmpari,
  • Marianthi Tsakaldimi,
  • E. Daskalakou,
  • P. Ganatsas

摘要

Key message

The relict tree species Juniperus drupacea found to form in its populations in Europe, un-evened young stands of one-storey, with low tree height, and diameter growth pattern similar to other trees.

Abstract

Juniperus drupacea Labill. is a relict tree species distributed in west Asia (Turkey, Syria, Lebanon and Israel), while in Europe it is only found in southern Greece, Peloponnese. It appears in patches and its habitat, in many cases, appeared fragmented. This study aims to provide a detailed account of the forest stand structure of J. drupacea in the two unique populations of Europe, on Mount Parnon, south Greece, along with a comprehensive analysis of the species’ growth pattern based on tree-ring analysis. The results analysis indicated that J. drupacea within two populations (northern and southern - at local scale) comprises uneven aged stands, which probably were established progressively in successive waves. The majority of the sampled trees are between 30 and 60 years old, while there are some individuals elder or younger. However, only a few individuals exceed 60 years of age, clearly suggesting that stand establishment occurred predominantly after 1960. This variation in age does not lead to significant differences in height, as most plots exhibit a single-storey stand with only minor fluctuations in tree height; in most plots, trees are ranging between 4 and 8 m in height, while a small proportion of trees in some north and south plots reach greater heights, up to 10 m. These findings confirm that the species is morphologically characterized as a small tree, which reaches at a height up to 12 m in the mature stage (100–120 years old). Annual pattern growth shows that this depends on the tree age classes, and it is significantly higher in the trees of northern population origin. Special silvicultural measures, e.g. stand tending aiming at favoring the best trees, by removing their most competitive individual, are suggested for improving species populations’ conservation.