Linking oceanic food webs to coastal production and growth rates of Pacific salmon (Oncorhynchus spp.), using models on three scales
Linking oceanic food webs to coastal production and growth rates of Pacific salmon (Oncorhynchus spp.), using models on three scales
复制标题
DOI：
10.1016/j.dsr2.2004.12.017
复制
发表时间：
2005-01-01
影响因子：
3
通讯作者：
Myers, KW
中科院分区：
文献类型：
--
作者：
Aydin, KY;McFarlane, GA;Myers, KW
三种独立的建模方法：营养盐-浮游植物-浮游动物（NPZ）模型（根室）。将食物网模型（Ecopath/Ecosim）和粉红鲑鱼（Oncorhynchus gorbuscha）的生物能量学模型联系起来，以研究季节性浮游动物动态与太平洋鲑鱼在阿拉斯加亚北极环流生态系统中觅食和生长的年度食物网生产潜力之间的关系。这种相关的方法表明了季节性和个体发育猎物转换对食浮游动物的粉红鲑鱼的重要性，并说明了富含脂质的饲料物种，特别是性腺鱿鱼Berrytheuthis anonychus，在将浮游动物与高营养级生产联系起来方面所发挥的关键作用。亚北极北太平洋。研究结果强调，需要揭示自然机制，负责加速冬末和早春鲑鱼生长，特别是在气候变化和浮游动物开花时间，我们的研究结果表明，模拟和观察到的公海粉红鲑鱼生长之间的最佳匹配需要将两个因素纳入生物能量学模型：（1）由于春季水层混合层深度变浅，浮游动物集中，鲑鱼的能量觅食成本降低;（2）鲑鱼饮食从浮游动物到鱿鱼的个体发育转换。最后，我们改变了沿海鲑鱼生产的时间和投入水平，以研究密度依赖的沿海过程对海洋喂养的影响;沿海过程对鲑鱼生长的限制相对较小，可能会延迟个体发育饮食转变的季节性时间，从而对鲑鱼的整体生长率产生放大效应。(c)2005爱思唯尔有限公司保留所有权利。
Three independent modeling rnethods-a nutrient-phytoplankton-zooplankton (NPZ) model (NEMURO). a food web model (Ecopath/Ecosim), and a bioenergetics model for pink salmon (Oncorhynchus gorbuscha) Were linked to examine the relationship between seasonal zooplankton dynamics and annual food web productive potential for Pacific salmon feeding and growing in the Alaskan subarctic gyre ecosystem. The linked approach shows the importance of seasonal and ontogenetic prey switching for zooplanktivorous pink salmon, and illustrates the critical role played by lipid-rich Forage species, especially the gonatid squid Berrytheuthis anonychus, in connecting zooplankton to upper trophic level production in the subarctic North Pacific. The results highlight the need to uncover natural mechanisms responsible for accelerated late winter and early spring growth of salmon, especially with respect to climate change and zooplankton bloom timing, Our results indicate that the best match between modeled and observed high-seas pink salmon growth requires the inclusion of two factors into bioenergetics models: (1) decreasing energetic foraging costs for salmon as zooplankton are concentrated by the spring shallowing of pelagic mixed-layer depth and (2) the ontogenetic switch of salmon diets from zooplankton to squid. Finally, we varied the timing and input levels of coastal salmon production to examine effects of density-dependent coastal processes on ocean feeding; coastal processes that place relatively minor limitations on salmon growth may delay the seasonal timing of ontogenetic diet shifts and thus have a magnified effect on overall salmon growth rates. (c) 2005 Elsevier Ltd. All rights reserved.