Abstract Pinus brutia var. pityusa (Steven) Silba (Calabrian pine) is considered a vulnerable species because of reductions in its population sizes linked to habitat decline in recent decades. Global warming alongside the collateral modification of precipitation regimes may markedly affect the distribution ranges of this species. In this dendroecological study, we identified the most influential climatic factors affecting the radial growth of P. brutia on the northern and eastern coasts of the Black Sea among the northern refugia of this species. Chronologies from five sites located on the Crimea Peninsula and the Caucasian coast and exposed to varying climatic conditions were used in this analysis. The study of environmental factors controlling the growth of P. brutia trees in the coastal populations of Crimea and the Caucasus revealed that within the longitudinal transect, which encompasses a specific range of climatic conditions, correlations between climate and the growth of P. brutia under analogous orographic conditions are similar. Aridisation of the dry Crimean climate in 1981–2012 led to an increase in the tree growth response. In the same period, populations of P. brutia trees growing in the subtropical climate of the Black Sea coast exhibited a weakened growth response to the point of disappearance. The northern populations of P. brutia, which are at the climatic limit of the species’ distribution, are exposed to a high risk of increasing climate aridisation. Our findings could provide useful information for further research on the effects of climate change on Black Sea coastal forest ecosystems.

中文翻译：

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克里米亚和高加索黑海沿岸黑松的气候响应

摘要松树变种。pityusa (Steven) Silba (Calabrian pine) 被认为是一种脆弱的物种，因为近几十年来其种群数量的减少与栖息地的减少有关。全球变暖以及降水制度的附带修改可能会显着影响该物种的分布范围。在这项树木生态学研究中，我们确定了影响黑海北部和东部海岸 P. brutia 在该物种北部避难所中径向生长的最有影响力的气候因素。本分析使用了位于克里米亚半岛和高加索海岸并暴露于不同气候条件的五个地点的年表。控制P生长的环境因素的研究。克里米亚和高加索沿海种群中的 brutia 树表明，在包含特定气候条件范围的纵向断面内，气候与 P. brutia 在类似地形条件下的生长之间的相关性是相似的。1981-2012 年克里米亚干燥气候的干旱导致树木生长反应增加。在同一时期，生长在黑海沿岸亚热带气候的 P. brutia 树种群对消失点的生长反应减弱。P. brutia 的北部种群处于该物种分布的气候极限，面临气候干旱化加剧的高风险。