Isotopes and content of carbon, nitrogen, and sulfur of eelgrass (Zostera marina) from West Falmouth Harbor from 2005 through 2019

West Falmouth Harbor (West Falmouth, MA, USA) has been experiencing a dramatic increase in nitrogen loading from an upgradient municipal wastewater treatment facility since the early 2000’s. As part of a long-term study into the effects of this nitrogen enrichment, we have been assessing changes in the extent and health of the eelgrass (Zostera marina) community within the harbor. Eelgrass shoots were collected during the summer and run for carbon (C), nitrogen (N), and sulfur (S) content and isotopic composition. Samples were analyzed from 7 stations in the more well-flushed outer harbor (OH), 4 stations in the middle of the harbor (MH), and 6 stations in the inner portion of the harbor in close proximity to a high groundwater nitrate source (Snug Harbor, SH). Carbon data is available from 2011 through 2018, nitrogen data from 2006 through 2018, and sulfur data from 2005 through 2019 with a few samples from 2021. Sulfur results have been published in Haviland et al. 2022 (doi: 10.1002/lno.12025).

美国马萨诸塞州西法尔茅斯港（West Falmouth Harbor, West Falmouth, MA, USA）自21世纪初以来，上游市政污水处理设施带来的氮负荷呈急剧上升趋势。作为该氮富集效应长期研究的组成部分，我们持续评估该港内鳗草（Zostera marina）群落的分布范围与健康状况变化。夏季期间采集鳗草植株，测定其碳（C）、氮（N）与硫（S）含量及同位素组成。本次采样覆盖三类区域：水交换更充分的外港（outer harbor, OH）布设7个站位、港内中部（middle harbor, MH）布设4个站位，以及紧邻高地下水硝酸盐源的港内区域（斯纳格港，Snug Harbor, SH）布设6个站位。碳数据的时间跨度为2011至2018年，氮数据为2006至2018年，硫数据为2005至2019年，另包含2021年的少量样品。硫元素相关研究结果已发表于Haviland等人2022年的学术论文（DOI: 10.1002/lno.12025）。