Abstract Gracilaria tikvahiae, an endemic western North Atlantic red alga, was cultivated for nutrient bioextraction in urbanized estuarine waters in Long Island Sound and the Bronx River Estuary, USA. This study assesses the feasibility of an integrated approach of using G. tikvahiae produced in this bioextraction system as sustainable biomass source for agar production. Agars were extracted after alkaline pre-treatment and characterized in terms of gelling strength, chemical composition, chemical structure and gel structure. Results indicated that this seaweed performed similar to other cultivated Gracilaria in terms of extraction yield and gelling strength of the agar. Differences between sites were not significant in terms of agar gel strength, though yield was higher at Long Island Sound. The extracted agars were sulfated, methylated and with no detectable pyruvate substituents. It is possible to use an integrated strategy of nutrient bioextraction in urbanized estuarine waters and agar exploitation with G. tikvahiae.

中文翻译：

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在开放水域养殖场培养用于营养生物提取的江蓠琼脂的表征

摘要 Gracilaria tikvahiae 是北大西洋西部特有的一种红藻，在美国长岛海峡和布朗克斯河口的城市化河口水域中用于营养生物提取。本研究评估了使用该生物提取系统中产生的 G. tikvahiae 作为可持续生物质来源进行琼脂生产的综合方法的可行性。琼脂在碱性预处理后提取，并在凝胶强度、化学成分、化学结构和凝胶结构方面进行表征。结果表明，这种海藻在琼脂的提取率和胶凝强度方面与其他栽培江蓠相似。在琼脂凝胶强度方面，地点之间的差异并不显着，但长岛湾的产量更高。提取的琼脂硫酸化，甲基化且没有可检测的丙酮酸取代基。可以在城市化河口水域中使用营养生物提取的综合策略和 G. tikvahiae 的琼脂开发。