北温带针叶林是北方和温带森林之间的重要连接器,然而,他们容易受到各种压力因素的影响,如气候变化和人类活动。严重的干旱对这些森林中的植物物种构成了重大威胁,促使最近对其影响的研究。然而,许多研究缺乏对扰动后植被过程的明确定义,并且未能确定与扰动因素的潜在相互作用,需要进行全面的讨论。这项研究考察了干旱对北温带地区主要优势种的树木生长模式的影响:冷杉和云杉,以及两种常见的白桦,还有蒙古槲树.此外,这些物种居住的森林中的新干扰因素(A.nrolepis和jezoensis)是根据社区分类进行评估的。研究地点位于Mt。百都(长白)和韩国地区,位于目标物种植物地理格局的南部界限。结果表明,肾虚曲霉菌和jezosis表现出高水平的恢复和弹性,而B.ermanii和Q.mongolica表现出高抗性。物种特异性反应与干旱强度一致,抵抗,recovery,恢复力随着干旱前径向生长的增加而显著下降。韩国森林,树种雷公藤在树层植被中死亡后的入侵威胁着新树的再生。然而,某些环境因素,例如高岩石暴露和密集的树冠,限制藤蔓入侵。根据结果,干旱前的径向生长是树木如何应对干旱的关键决定因素。此外,结果表明,由于全球变暖引起的过度植被死亡,森林缝隙中可能出现新的干扰。这些发现有助于更深入地了解干旱胁迫的增加,帮助识别气候避难所,并根据栖息地特征告知保护优先事项。
Northern temperate coniferous forests serve as crucial connectors between boreal and temperate forests, yet they are vulnerable to various stressors such as climate change and human activities. Severe drought poses a significant threat to plant species within these forests, prompting recent research into its impacts. However, many studies lack explicit definitions of post-disturbance vegetation processes and fail to identify potential interactions with disturbance factors, necessitating comprehensive discussions. This study examines the effects of drought on tree growth patterns of the main dominant species in northern temperate regions: Abies nephrolepis and Picea jezoensis, along with two commonly associated Betula ermanii, and Quercus mongolica. Additionally, new disturbance factors in forests inhabited by these species (A. nephrolepis and P. jezoensis) were evaluated based on community classification. The study sites were located in the Mt. Baekdu (Changbai) and South Korea regions, which are positioned at the southern limit of the phytogeographical patterns of target species. Results indicate that A. nephrolepis and P. jezoensis exhibit high levels of recovery and resilience, while B. ermanii and Q. mongolica demonstrate high resistance. Species-specific responses align with drought intensity, with resistance, recovery, and resilience decreasing notably with increasing pre-drought radial growth. South Korean forests, the invasion of the vine species Tripterygium regelii after the death of A. nephrolepis in the overstory vegetation threatens the regeneration of new trees. However, certain environmental factors, such as high rock exposure and dense overstory canopy, limit vine invasion. Based on the results, pre-drought radial growth emerges as a key determinant in how trees respond to drought. Additionally, the results suggest the potential for new disturbances to emerge in forest gaps due to overstory vegetation mortality induced by global warming. These findings contribute to a deeper understanding of increasing drought stress, aid in identifying climate refugia, and inform conservation priorities based on habitat characteristics.