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首页> 外文期刊>Estuarine Coastal and Shelf Science >Fish Farming Enhances Biomass And Nutrient Loss In Posidonia Oceanica (l.) Delile
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Fish Farming Enhances Biomass And Nutrient Loss In Posidonia Oceanica (l.) Delile

机译：养鱼可增加大洋波塞德尼娅湖中的生物量和营养损失

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摘要

Fish farming impact on the seasonal biomass, carbon and nutrient (nitrogen and phosphorus) balance of the endemic Mediterranean seagrass Posidonia oceanica was assessed in the Aegean Sea (Greece) in order to detect changes in magnitude and fate of seagrass production and nutrient incorporation with organic loading of the meadows. Phosphorus concentration in the leaves, rhizomes and roots was enhanced under the cages throughout the study. Standing biomass was diminished by 64% and carbon, nitrogen and phosphorus standing stock by 64%, 61% and 48%, respectively, under the cages in relation to those at the control. Seagrass production decreased by 68% and element (C, N, P) incorporation by 67%, 58% and 58%, respectively, under the cages. Leaf shedding was reduced by 81% and loss of elements (C, N, and P) through shedding by 82%, 74% and 72%, respectively, under the cages. Leaf and element (C, N, P) residual loss rate, accounting for grazing and mechanical breakage of leaves, was decreased by 79%, 85%, 100% and 96%, respectively, at the control station. At the control station, 13.98 gCm~(-2)yr~(-1) 1.91 gNm~(-2)yr~(-2) and 0.05 gPm~(-2)yr~(-1) were produced in excess of export and loss. In contrast, under the cages 12.69 gCm ~(-2) yr~(-1), 0.31 g N m~(-2) yr~(-1) and 0.04 g P m~(-2) yr~(-1) were released from the meadow. Organic loading due to fish farm discharges transformed the seagrass meadow under the cages from a typical sink to a source of organic carbon and nutrients.
机译：在爱琴海（希腊）评估了养鱼对地中海特有海草Posidonia oceanica季节性生物量，碳和养分（氮和磷）平衡的影响，以检测海草产量和命运的变化以及与有机物结合的养分草地的负载。在整个研究过程中，网箱下叶，根茎和根中的磷浓度均增加。与对照相比，笼中的固定生物量减少了64％，碳，氮和磷的固定存量分别减少了64％，61％和48％。网箱内的海草产量分别减少了68％，元素（C，N，P）的掺入分别减少了67％，58％和58％。在笼子下，叶片脱落分别减少了81％和82％，74％和72％，从而减少了元素（碳，氮和磷）的损失。在控制站，由于放牧和叶片机械断裂，叶片和元素（C，N，P）的残留损失率分别降低了79％，85％，100％和96％。在控制站，产生的13.98 gCm〜（-2）yr〜（-1）为1.91 gNm〜（-2）yr〜（-2）和0.05 gPm〜（-2）yr〜（-1）出口和损失。相反，在笼子下12.69 gCm〜（-2）yr〜（-1），0.31 g N m〜（-2）yr〜（-1）和0.04 g P m〜（-2）yr〜（-1） ）从草地上释放出来。养鱼场排放的有机物将网箱下的海草草甸从典型的水槽转变为有机碳和营养素的来源。

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