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首页> 外文期刊>Estuarine Coastal and Shelf Science >Effect of artificial reefs (southern Portugal) on sediment-water transport of nutrients: Importance of the hydrodynamic regime
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Effect of artificial reefs (southern Portugal) on sediment-water transport of nutrients: Importance of the hydrodynamic regime

机译：人工鱼礁（葡萄牙南部）对营养物沉积物-水的运输的影响：水动力机制的重要性

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The present study investigates the differences between nutrient fluxes and particulate organic matter within an artificial reef system (AR) deployed in August 2002 off Faro (Algarve, Southern Portugal) and in a non-reef area (NRA), and how fluxes and suspended material may be affected by the hydrodynamic regime. Surveys to collect sediment cores, suspended/settled particles and overlying water samples were carried out by divers, from March (2006) to October (2007) in AR and NRA. Sediment cores and settled particles were collected to determine grain size, organic and inorganic carbon, nitrogen and phosphorus content. Overlying water and pore water samples were analysed for ammonium, nitrite, nitrate, phosphate, silicate, dissolved organic nitrogen, dissolved organic phosphorus and chlorophyll a. Results from the period studied showed that: (1) the benthic export of dissolved N, P and Si was 2-3 times higher at AR; (2) the particulate organic carbon (POC), nitrogen (PON) and phosphorus (POP) in suspended/settled particles were about 1.5 times higher at AR; (3) at both AR and NRA, the benthic export of dissolved N, P and Si, during a calm weather period, was 2-4 times higher than during or immediately after a storm event; and (4) at both sites, particulate organic compounds (POC, PON and POP) increased about 20 times during a storm event. These findings suggest that both the nutrients transport from sediment to water column and the quantity/quality of suspended/settled particles were highly dependent on the existence of reef structures and on the hydrodynamic regime.
机译：本研究调查了2002年8月在法鲁（葡萄牙南部阿尔加维）附近和非珊瑚礁地区（NRA）部署的人工鱼礁系统（AR）中养分通量和颗粒有机物之间的差异，以及通量和悬浮物的差异可能会受到流体动力状态的影响。从2006年3月（2007年10月）至2007年10月（2007年），在AR和NRA，潜水员进行了收集沉积物芯，悬浮/沉淀颗粒和上覆水样的调查。收集沉积物芯和沉降颗粒，以确定粒径，有机和无机碳，氮和磷含量。分析了上层水和孔隙水样品中的铵，亚硝酸盐，硝酸盐，磷酸盐，硅酸盐，溶解的有机氮，溶解的有机磷和叶绿素a。研究期间的结果表明：（1）溶质中N，P和Si的底栖出口比AR高2-3倍； （2）悬浮/沉降颗粒中的颗粒有机碳（POC），氮（PON）和磷（POP）在AR处高约1.5倍； （3）在风平浪静的时期，AR和NRA的底栖N，P和Si底栖出口量比暴风雨发生时或暴风后高出2-4倍； （4）在两个地点，暴风雨期间颗粒有机化合物（POC，PON和POP）增加了约20倍。这些发现表明，养分从沉积物到水柱的运输以及悬浮/沉降颗粒的数量/质量都高度依赖于礁石结构的存在和流体动力学状态。

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