Nutrient export from freshwater ecosystems by anadromous sockeye salmon (Oncorhynchus nerka)
Nutrient export from freshwater ecosystems by anadromous sockeye salmon (Oncorhynchus nerka)
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溯河产卵红鲑鱼（Oncorhynchus nerka）从淡水生态系统输出养分
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
D. Schindler
中科院分区：
文献类型：
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作者：
J. Moore;D. Schindler
溯河鲑鱼和半产鲑鱼在返回产卵和死亡时将营养物质从海洋运输到淡水，这一过程激发了大量关于鲑鱼来源的营养物质在沿海生态系统中的作用的研究。然而，当鲑鱼作为小鲑鱼迁移到海洋时，它们也会从淡水中运输营养物质。利用76年的特定年龄的小鲑鱼洄游和成年鲑鱼逃逸数据，我们计算了阿拉斯加布里斯托尔湾四个主要系统中红鲑鱼（Oncorhynchus nerka）进口和出口的氮和磷的数量。幼鱼平均带走了父母带到淡水中的16%的磷和12%的氮。幼崽输出的亲本营养物质的百分比随时间和地点的不同而变化，从1%到65%的磷，从不足1%到47%的氮。在幼鱼较大的系统中，它们输出的营养物质比例更高。根据密度依赖的强度，…
Anadromous and semelparous salmon transport nutrients from the ocean to fresh waters when they return to spawn and die, a process inspiring a large body of research on the role of salmon-derived nutrients in coastal ecosystems. However, salmon also transport nutrients out of fresh waters when they migrate to the ocean as smolts. Using a total of 76 years of age-specific smolt-migration and adult-escapement data, we calculated the amounts of nitrogen and phosphorus that sockeye salmon (Oncorhynchus nerka) imported and exported from four major systems in Bristol Bay, Alaska. Smolts removed an average of 16% of the phosphorus and 12% of the nitrogen that their parents transported into fresh waters. The percentage of parental nutrients that smolts exported varied through time and among sites, ranging from 1% to 65% of the phosphorus and from less than 1% to 47% of the nitrogen. In systems where smolts were larger, they exported a higher percentage of nutrients. Depending on the strength of density-dependence,...