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首页> 外文期刊>Marine ecology progress series >Coastal silicon cycling amplified by oyster aquaculture
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Coastal silicon cycling amplified by oyster aquaculture

机译：牡蛎水产养殖扩增沿海硅循环

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Filter-feeders play an important role in regulating nutrient availability in coastal systems, with important implications for phytoplankton community composition, primary production, and food web structure. The role of filter-feeding bivalves in the nitrogen and phosphorus cycles is relatively well established, but their impact on coastal silicon (Si) cycling remains poorly understood. To help reduce this uncertainty, we quantified rates of Si recycling and the size of various Si pools at an oyster (Crassostrea virginica) farm. We found that oysters drive rapid recycling of dissolved Si (DSi) to the water column, primarily by altering rates of sediment Si flux. Sediments beneath oyster aquaculture recycled DSi to the water column at more than twice the rate (2476.06 mu mol DSi m(-2) h(-1)) of nearby bare sediments (998.75 mu mol DSi m(-2) h(-1)). Oysters consume DSi at a low rate (-0.06 mu mol DSi ind.(-1) h(-1)), and, while we were unable to determine the fate of that Si, we hypothesize that at least some of it may be stored in the shell and tissue, which are both small Si pools (0.55 and 0.13% Si by mass respectively). Si held in oysters is removed from the system when oysters are harvested, but this removal is small compared to oyster-mediated enhancements in sediment Si recycling. In a broader context, coastal systems with larger oyster populations are likely to have a more rapid Si cycle, with more Si available to primary producers in the water column than those with no oysters.
机译：过滤器馈线在调节沿海系统中的营养可用性方面发挥着重要作用，对浮游植物群落组成，初级生产和食品网结构的重要意义。过滤喂养纤维纤维在氮气和磷循环中的作用相对明确，但它们对沿海硅（Si）循环的影响仍然明显。为了帮助减少这种不确定性，我们在牡蛎（Crassostrea Virginica）农场中量化Si回收和各种Si池的大小。我们发现牡蛎驱动了溶解的Si（DSI）到水柱的快速回收，主要是通过改变沉积物Si助焊剂的速率。牡蛎水产养殖下面的沉积物在附近裸沉积物的比率（2476.06 mol dsi m（-2）h（-1））（998.75 mm mol dsi m（-2）h（-1 ）））。牡蛎以低速率消耗DSI（-0.06 mm mol dsi Ind。（ - 1）h（-1）），而我们无法确定该Si的命运，我们假设至少有些人可能是储存在壳体和组织中，它们都是小Si池（分别为0.55和0.13％）。当收获牡蛎时，从系统中取出牡蛎的Si，但与沉积物Si回收中的牡蛎介导的增强相比，这种去除率小。在更广泛的背景下，具有较大牡蛎种群的沿海系统可能具有更快的Si周期，水柱中的主要生产商可用更多SI，而不是没有牡蛎。

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