Pollen and plant macrofossils are often well-preserved in coastal sediments, providing a palaeoenvironmental record of sea-level and landscape change. In this study, we examine the pollen and plant macrofossil assemblages of a well-dated saltmarsh sediment core from southwest Newfoundland, Canada, to establish recent coastal vegetation and land use change, to increase the knowledge of anthropogenic activities in the area and develop pollen chronozones for reconstructing marsh accumulation rates and to examine the representation of plant macrofossil remains in the wetland pollen profile. Grouping the pollen record into upland and wetland assemblages allows local events related to hydrological change to be separated from landscape-scale changes. The wetland pollen and plant macrofossil records indicate a general acceleration in sea-level rise ca. ad 1700. The sedge pollen and plant macrofossil records attest to multiple phases of rhizome encroachment during inferred periods of marine regression. Two chronozones are identified from the upland pollen profile; the first associated with the settlement of St. George’s Bay ca. ad 1800, signalled by increases in Plantago lanceolata and Ambrosia pollen; the second with the permanent settlement of the Port au Port peninsula ca. ad 1850, indicated by increased P. lanceolata and Rumex pollen. Comparison of the plant macrofossil and wetland pollen profiles highlights the underrepresentation of grass pollen preserved in the saltmarsh sediments and a need for further analysis of the zonation, pollen dispersal and macrofossil representation of sedge species in saltmarshes.

花粉和植物大型化石通常在沿海沉积物中保存完好，提供了海平面和景观变化的古环境记录。在这项研究中，我们检查了加拿大纽芬兰西南部一个年代久远的盐沼沉积岩心的花粉和植物大化石组合，以确定最近的沿海植被和土地利用变化，增加对该地区人为活动的了解并开发花粉计时带用于重建沼泽堆积率并检查湿地花粉剖面中植物大化石遗存的表示。将花粉记录分为高地和湿地组合，可以将与水文变化相关的局部事件与景观尺度变化分开。湿地花粉和植物大化石记录表明海平面上升大约加速。广告1700莎草科花粉和植物大化石记录中海退的推断时间证明根茎侵占的多个阶段。从高地花粉剖面中确定了两个时间带；第一个与圣乔治湾的定居点有关。公元1800 年，车前草和豚草花粉增加；第二个与太子港半岛的永久定居点约。公元1850 年，通过增加的P. lanceolata和Rumex 表明花粉。植物大型化石和湿地花粉剖面的比较突出了盐沼沉积物中保存的草花粉的代表性不足，需要进一步分析盐沼中莎草物种的分带、花粉扩散和大型化石代表性。