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首页> 外文期刊>Estuarine Coastal and Shelf Science >Benthic fluxes, net ecosystem metabolism and seafood harvest: Completing the organic carbon balance in the Ria de Vigo (NW Spain)
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Benthic fluxes, net ecosystem metabolism and seafood harvest: Completing the organic carbon balance in the Ria de Vigo (NW Spain)

机译：底栖通量，净生态系统新陈代谢和海产品收获：完成Ria de Vigo（西班牙西北部）中的有机碳平衡

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摘要

Simultaneous direct measurements of primary production, pelagic and benthic respiration and vertical fluxes allowed, for the first time, the evaluation of the carbon metabolism in the Ria de Vigo (NW Spain) on seasonal and annual scales. With this aim, a total of 16 oceanographic cruises covering the main oceanographic conditions were carried out between April 2004 and January 2005. In addition, a 2D carbon budget, including extraction from mussel culture and fisheries activities, is proposed. The pelagic system was net autotrophic during the spring and summer periods and autotrophic or almost in balance during autumn and winter. Vertical fluxes of organic carbon were higher than net community production (NCP) during autumn and winter periods, probably due to resuspension processes and inputs of organic matter from continental runoff. Benthic mineralization is an important process in the Ria de Vigo, which gains significance during autumn and winter when benthic respiration accounts for 40% and 45% of the total respiration, respectively. The Ria de Vigo is net autotrophic on annual basis (317 +/- 113 g C m(-2) yr(-1)) even though the benthic metabolism reduces the NCP by 23%. Total annual carbon seafood harvest amounted 3% of the net ecosystem metabolism and it is dominated by mussel culture (89%). However, based on mean energy transfer efficiency between trophic levels of 10%, it is estimated that mussel culture and reported fish catches require up to 38% of the NCP. The organic carbon produced in situ at the Ria de Vigo and available for export to the adjacent shelf or to be buried in the sediment represents 1/4 of the gross primary production and it is favoured during summer upwelling. (c) 2015 Elsevier Ltd. All rights reserved.
机译：同时直接测量初级生产，中上层和底栖呼吸和垂直通量，这首次允许按季节和年度尺度评估维阿河（西班牙西北部）的碳代谢。为此目的，在2004年4月至2005年1月之间总共进行了16次涵盖主要海洋条件的海洋航行。此外，还提出了二维碳预算，包括从贻贝养殖和渔业活动中提取碳的预算。中上层系统在春季和夏季是净自养的，而在秋季和冬季则是自养的或几乎处于平衡状态。在秋季和冬季，有机碳的垂直通量高于社区净生产（NCP），这可能是由于重悬浮过程和大陆径流有机物的输入所致。底栖矿化是维奥河的重要过程，在秋季和冬季，底栖呼吸作用分别占总呼吸作用的40％和45％，这一过程变得尤为重要。即使底栖代谢使NCP降低了23％，Ria de Vigo还是每年净自养（317 +/- 113 g C m（-2）yr（-1））。碳海产品的年度总收获量占生态系统净新陈代谢的3％，其中贻贝养殖占主导地位（89％）。但是，基于营养水平之间10％的平均能量转移效率，据估计，贻贝养殖和捕获的鱼类捕获量最多需要NCP的38％。 Ria de Vigo原位产生的有机碳可用于出口到相邻的架子或埋在沉积物中，占初级生产总值的1/4，在夏季上升期间受到青睐。 （c）2015 Elsevier Ltd.保留所有权利。

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