Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA

Organic aggregates, which formed from small particles and dissolved material, were chemically characterized in the Long Island Sound coastal waters. In this study, six aggregation experiments were conducted on low-salinity samples (the Thames River, CT, USA; salinity of 6.3–6.8) and high-salinity sa...

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Autores principales:	Tzong-Yueh Chen, Annelie Skoog
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	aggregation particulate organic matter neutral aldose amino acid roller table Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/a1a7d4d0d1a84b5e8ac6e414b13cbe1d
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spelling	oai:doaj.org-article:a1a7d4d0d1a84b5e8ac6e414b13cbe1d2021-11-11T19:56:37ZAbiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA10.3390/w132130772073-4441https://doaj.org/article/a1a7d4d0d1a84b5e8ac6e414b13cbe1d2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3077https://doaj.org/toc/2073-4441Organic aggregates, which formed from small particles and dissolved material, were chemically characterized in the Long Island Sound coastal waters. In this study, six aggregation experiments were conducted on low-salinity samples (the Thames River, CT, USA; salinity of 6.3–6.8) and high-salinity samples (the coast of Avery Point, CT, USA; salinity of 21.4–26.7). Water samples were incubated on a roller table for two days under dark conditions to generate laboratory-made aggregates. Particulate organic carbon (POC) concentrations increased 5–39% after two days of rolling. A higher POC increase occurred in low-salinity samples. The concentrations of neutral aldoses and amino acids, as well as their C- and N-yields, decreased during the experiments (except for particulate hydrolysable amino acid in low-salinity samples), while bacterial abundance increased 50–476%, indicating microbial degradation of biologically labile organic matter. Particulate hydrolysable amino acid was preferentially preserved in P-limited systems. An enrichment factor analysis showed the preferential microbial degradation of particulate hydrolysable neutral aldose and glucose appeared as the most labile aldose. The increase in bulk POC and the decrease in the fraction of labile organic carbon (neutral aldose and amino acid) in the particulate phase resulted in an accumulation of uncharacterized (presumably more refractory) particulate organic matter.Tzong-Yueh ChenAnnelie SkoogMDPI AGarticleaggregationparticulate organic matterneutral aldoseamino acidroller tableHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3077, p 3077 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aggregation particulate organic matter neutral aldose amino acid roller table Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	aggregation particulate organic matter neutral aldose amino acid roller table Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Tzong-Yueh Chen Annelie Skoog Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA
description	Organic aggregates, which formed from small particles and dissolved material, were chemically characterized in the Long Island Sound coastal waters. In this study, six aggregation experiments were conducted on low-salinity samples (the Thames River, CT, USA; salinity of 6.3–6.8) and high-salinity samples (the coast of Avery Point, CT, USA; salinity of 21.4–26.7). Water samples were incubated on a roller table for two days under dark conditions to generate laboratory-made aggregates. Particulate organic carbon (POC) concentrations increased 5–39% after two days of rolling. A higher POC increase occurred in low-salinity samples. The concentrations of neutral aldoses and amino acids, as well as their C- and N-yields, decreased during the experiments (except for particulate hydrolysable amino acid in low-salinity samples), while bacterial abundance increased 50–476%, indicating microbial degradation of biologically labile organic matter. Particulate hydrolysable amino acid was preferentially preserved in P-limited systems. An enrichment factor analysis showed the preferential microbial degradation of particulate hydrolysable neutral aldose and glucose appeared as the most labile aldose. The increase in bulk POC and the decrease in the fraction of labile organic carbon (neutral aldose and amino acid) in the particulate phase resulted in an accumulation of uncharacterized (presumably more refractory) particulate organic matter.
format	article
author	Tzong-Yueh Chen Annelie Skoog
author_facet	Tzong-Yueh Chen Annelie Skoog
author_sort	Tzong-Yueh Chen
title	Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA
title_short	Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA
title_full	Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA
title_fullStr	Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA
title_full_unstemmed	Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA
title_sort	abiotic aggregation of organic matter in coastal and estuarine waters: cases in the eastern long island sound, usa
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a1a7d4d0d1a84b5e8ac6e414b13cbe1d
work_keys_str_mv	AT tzongyuehchen abioticaggregationoforganicmatterincoastalandestuarinewaterscasesintheeasternlongislandsoundusa AT annelieskoog abioticaggregationoforganicmatterincoastalandestuarinewaterscasesintheeasternlongislandsoundusa
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Abiotic Aggregation of Organic Matter in Coastal and Estuarine Waters: Cases in the Eastern Long Island Sound, USA

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