Around 4000 cal yr BP, Scots pine (Pinus sylvestris) suffered a widespread demise across the British Isles. This paper presents new information about P. sylvestris populations found in the Welsh Marches (western central Britain), for which the long-term history and origins are poorly known. Two new pollen records were produced from the Lin Can Moss ombrotrophic bog (LM18) and the Breidden Hill pond (BH18). The LM18 peat core is supported by loss-on-ignition, humification analysis and radiocarbon dating. Lead concentrations were used to provide an estimated timeframe for the recent BH18 record. In contrast to many other Holocene pollen records from the British Isles, analysis of LM18 reveals that Scots pine grains were deposited continuously between c. 6900–300 cal yr BP, at frequencies of 0.3–5.4%. It is possible that individual Scots pine trees persisted through the wider demise on thin soils of steep drought-prone crags of hills or the fringes of lowland bogs in the Welsh Marches. At BH18, the record indicates a transition from broadleaved to mixed woodland, including conifer species introduced around AD 1850 including Picea and Pinus. The insights from BH18 suggest that the current populations may largely be the result of planting. Comparison of the LM18 findings with other regional pollen records highlights consistent patterns, including a Mid-Holocene maximum (ca. 7000 cal yr BP), long-term persistence at low pollen percentages and a Late-Holocene minimum (ca. 3000 cal yr BP). These distinctive trends encourage further studies on refugial areas for Scots pine in this region and elsewhere.

大约在4,000年BP左右，苏格兰松（Pinus sylvestris）在不列颠诸岛遭受了广泛灭绝。本文介绍了有关樟子松的新信息。在威尔士进行曲（英国中西部）中发现的种群，其长期历史和起源鲜为人知。Lin Can Moss疏养沼泽（LM18）和Breidden Hill池塘（BH18）产生了两个新的花粉记录。LM18泥炭芯具有点燃损失，腐殖化分析和放射性碳测年的支持。铅浓度用于提供最近BH18记录的估计时间表。与不列颠群岛的许多其他全新世花粉记录相反，对LM18的分析表明，苏格兰松树籽粒在c之间连续沉积。6900–300 cal yr BP，频率为0.3–5.4％。在威尔士进行曲中，单个的苏格兰松树可能会在干旱多发的陡峭山崖或低地沼泽边缘的稀薄土壤上持续灭亡。在BH18，云杉和松树。BH18的见解表明，目前的种群可能很大程度上是种植的结果。LM18的发现与其他区域花粉记录的比较突出了一致的模式，包括全新世中期的最大值（约7000 cal BP），低花粉百分比的长期持久性和全新世后期的最小值（约3000 cal BP）。 ）。这些独特的趋势鼓励对该区域和其他地方的苏格兰松树避难区进行进一步的研究。