Annually resolved tree rings enable us to distinguish past pollution and climate change effects on chronic tree decline, which affects significant areas around the world. The aim of the current study was to establish a pattern for the assimilation of heavy metals in regular and declining Quercus robur L. trees. Using laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS), ICP-MS, and atomic absorption spectroscopy (AAS), the present and historical changes in element levels were investigated. Twenty different environmental species, including water, soil, sediments, mushrooms, acorn, leaves, branches, bark, and wood, were analyzed. Time profiles of elements in earlywood tree rings were investigated. We demonstrated higher HM contamination in the present background with increasing Pb and Cd levels. The presence of Li and Sr in groundwater was reported for the first time. We found significant differences (p < 0.001) between declined (D) and normally (N) growing trees only in the 1960–2019 period (Levene's t-test), which was sustained by a significant negative trend in D‒ chronology (MK-test, two-tailed). The bootstrapped correlation showed a weak positive relationship between D‒ chronology and soil moisture and a negative relationship with temperature and evapotranspiration. Declined trees were less resistant to environmental stress factors than N‒ growing trees at present (2012 compared to 1953). Mn, Cu, Cd, Pb, Zn, and Ni contents in tree rings correlated with climate-induced drought conditions, explaining the increasing elemental contents after 1980. A significant relationship between earlywood tree rings, climate and HM contamination explained different response patterns for normal and declining trees. Metal availability is increasing with climate change effects, leading to higher rates and future concerns, especially considering the high environmental health risk of some elements, such as Pb and Cd.

每年解析的树木年轮使我们能够区分过去的污染和气候变化对慢性树木衰退的影响，这影响了世界各地的重要地区。本研究的目的是建立一个正常和下降的栎属植物中重金属的同化模式。L. 树。使用激光烧蚀电感耦合等离子体质谱 (LA-ICP-MS)、ICP-MS 和原子吸收光谱 (AAS)，研究了元素水平的当前和历史变化。分析了 20 种不同的环境物种，包括水、土壤、沉积物、蘑菇、橡子、树叶、树枝、树皮和木材。研究了早材树轮中元素的时间分布。我们在当前背景下证明了更高的 HM 污染，随着 Pb 和 Cd 水平的增加。首次报道了地下水中存在锂和锶。我们发现显著差异（p 下降（d）之间<0.001）和正常（N）仅在1960至2019年期间生长的树木（列文的吨-test)，这是由 D- 年表 ( MK- 测试，双尾）。自举相关表明 D- 年表与土壤水分之间呈弱正相关，与温度和蒸散量呈负相关。目前（2012 年与 1953 年相比），衰落的树木对环境胁迫因素的抵抗力低于 N- 生长的树木。树木年轮中的 Mn、Cu、Cd、Pb、Zn 和 Ni 含量与气候引起的干旱条件相关，解释了 1980 年后元素含量的增加。早木年轮、气候和重金属污染之间的显着关系解释了正常情况下不同的响应模式和衰退的树木。随着气候变化的影响，金属的可用性正在增加，导致更高的比率和未来的担忧，特别是考虑到某些元素（例如 Pb 和 Cd）的高环境​​健康风险。