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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Spatiotemporal variation characteristics and related affecting factors of dissolved carbohydrates in the East China Sea
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Spatiotemporal variation characteristics and related affecting factors of dissolved carbohydrates in the East China Sea

机译：东海溶解性碳水化合物的时空变化特征及相关影响因素

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Carbohydrates are the largest identified fraction of dissolved organic carbon and play an important role in biogeochemical cycling in the ocean. Seawater samples were collected from the East China Sea (ECS) during June and October 2012 to study the spatiotemporal distributions of total dissolved carbohydrates (TCHOs) constituents, including dissolved monosaccharides (MCHO5) and polysaccharides (PCHOs). The concentrations of TCHO5, MCHOs and PCHOs showed significant differences between summer and autumn 2012, and exhibited an evident diurnal variation, with high values occurring in the daytime. Phytoplankton biomass was identified as the primary factor responsible for seasonal and diurnal variations of dissolved carbohydrates in the ECS. The TCHOs, MCHOs and PCHOs distributions in the study area displayed similar distribution patterns, with high concentrations appearing in the coastal water. The influences of chlorophyll-a, salinity and nutrients on the distributions of these carbohydrates were examined. A carbohydrates enrichment in the near-bottom water was found at some stations, implying that there might be an important source of carbohydrate in the deep water or bottom sediment. (C) 2015 Elsevier Ltd. All rights reserved.
机译：碳水化合物是确定的最大溶解有机碳组分，在海洋生物地球化学循环中起着重要作用。 2012年6月至10月期间，从东海（ECS）收集了海水样本，以研究总溶解碳水化合物（TCHO）成分的时空分布，包括溶解性单糖（MCHO5）和多糖（PCHO）。 TCHO5，MCHO和PCHO的浓度在2012年夏季和秋季之间显示出显着差异，并且表现出明显的昼夜变化，白天出现高值。浮游植物的生物量被认为是造成ECS中溶解碳水化合物的季节性和昼夜变化的主要因素。研究区的TCHO，MCHO和PCHO分布显示出相似的分布模式，沿海水域出现高浓度。研究了叶绿素-a，盐分和养分对这些碳水化合物分布的影响。在某些站点发现了底部水附近富含碳水化合物，这表明深水或底部沉积物中可能存在重要的碳水化合物来源。 （C）2015 Elsevier Ltd.保留所有权利。

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