Influence of Climate and Coastal Flooding on Eastern Red Cedar Growth along a Marsh-Forest Ecotone
Influence of Climate and Coastal Flooding on Eastern Red Cedar Growth along a Marsh-Forest Ecotone
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DOI：
10.3390/f13060862
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发表时间：
2022-05
期刊：
影响因子：
2.9
通讯作者：
S. Hall;S. Stotts;L. Haaf
中科院分区：
文献类型：
--
作者：
S. Hall;S. Stotts;L. Haaf
大西洋中部地区的沿海森林由于长期和间歇性的盐碱化和水文变化而受到海平面上升的威胁，导致内陆沼泽迁徙和幽灵森林的出现。这项研究使用树状年代学来探索海平面上升对德克萨斯州多佛市特拉华州国家河口研究保护区圣琼斯部分的维吉尼亚杜松(东部红柏)年生长的影响。建立了低海拔和高海拔的年表，并产生了不同的年表(高-低)。对树木应力的现场快速评估表明，低海拔树木的压力更大，而低海拔土壤测试显示，与高海拔树木样本相比，土壤水分和盐分含量更高。年轮宽度指数与水位、降水量、标准降水蒸散量指数和温度之间的关系采用皮尔逊相关分析。生长在低海拔地区的树木表现出更高的气候敏感度，对凉爽潮湿的夏季反应良好。随着时间的推移，增长和气候变量之间的相关性降低，而与潮汐水位的负相关性增加--这种模式早在近十年前的低海拔系统中就出现了。鉴于东部红柏的广泛分布及其对海平面变化的敏感性，该物种可能特别有用，可以作为海平面上升时沿海地貌变化的哨兵。
Coastal forests in the Mid-Atlantic region are threatened by sea level rise through chronic and episodic salinization and hydrologic alterations, leading to inland marsh migration and the occurrence of ghost forests. This study uses dendrochronology to explore the impact of rising sea level on the annual growth of Juniperus virginiana (the Eastern red cedar) at the St. Jones component of the Delaware National Estuarine Research Reserve in Dover, DE. Chronologies from low and high elevations were developed, and a difference chronology (high–low) was generated. A rapid field assessment of tree stress indicated greater stress in low elevation trees, and low elevation soil tests showed higher soil moisture and salt content compared to samples from high elevation. Ring width indices were analyzed in relation to water level, precipitation, the Standardized Precipitation Evapotranspiration Index, and temperature, with Pearson’s correlation analysis. Trees growing at low elevation showed greater climate sensitivity and responded favorably to cool, wet summers. Over time, correlations between growth and climate variables decreased, while negative correlations with tidal water level increased—a pattern that presented nearly a decade earlier in the low elevation system. Given the widespread distribution of the Eastern red cedar and its sensitivity to changes in sea level, this species may be particularly useful as a sentinel of change in coastal landscapes as sea levels rise.