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首页> 外文期刊>Estuarine Coastal and Shelf Science >Continental inputs of C, N, P and Si species to the Ria de Vigo (NW Spain)
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Continental inputs of C, N, P and Si species to the Ria de Vigo (NW Spain)

机译：C，N，P和Si物种向Ria de Vigo的大陆输入（西班牙西北部）

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摘要

C, N, P and Si in dissolved, particulate, organic and inorganic forms, determined from 12 surveys in the river Oitaben-Verdugo during 2002, allowed quantification of the chemical composition, phase partitioning and fluxes of continental materials to the inner Ria de Vigo (NW Spain). Despite the large fluxes normalised to the drainage basin of the river Oitaben-Verdugo (280 mmol C m~(-2) y~(-1), 56.5 mmol Nm~(-2)y~(-1), 1.35 mmol P m~(-2)y~(-1), and 61.3 mmol Si m~(-2)y~(-1)), its reduced dimensions (350 km~2) yielded relatively low concentrations of these species. Organic C, N and P represented 62%, 43% and 48% of the total C, N and P fluxes, respectively. About 90% of the organic C and N and 60% of the organic P was in the dissolved form. The chemical composition of the organic materials was compatible with detrital organic matter derived from aquatic plants, phytoplankton and soil leaching but not with unprocessed terrestrial plants. Significant temporal changes were observed in the chemical composition, related to the seasonal cycle of the biological activity in stream waters and soils, as well as the chemical weathering reactions. Spatial differences were due to the contrasting dynamic regime and, likely, the origin of the materials.
机译：从2002年在Oitaben-Verdugo河中进行的12次调查中确定的，溶解的，颗粒状，有机和无机形式的C，N，P和Si可以定量分析化学成分，相分配和大陆物质通向Ria de Vigo的通量（西班牙西北）。尽管通向Oitaben-Verdugo河流域的水通量很大（280 mmol C m〜（-2）y〜（-1），56.5 mmol Nm〜（-2）y〜（-1），1.35 mmol P m〜（-2）y〜（-1）和61.3 mmol Si m〜（-2）y〜（-1）），其减小的尺寸（350 km〜2）产生了相对较低的浓度。有机碳，氮和磷分别占总碳，氮和磷通量的62％，43％和48％。大约90％的有机C和N和60％的有机P处于溶解状态。有机材料的化学成分与源自水生植物，浮游植物和土壤浸出的碎屑有机物相容，但与未经加工的陆生植物不相容。在化学成分中观察到了显着的时间变化，这与溪流水和土壤中的生物活性的季节性周期以及化学风化反应有关。空间差异是由于动态机制的差异以及材料的起源所致。

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