Salmon carcasses increase stream productivity more than inorganic fertilizer pellets: a test on multiple trophic levels in streamside experimental channels.
Salmon carcasses increase stream productivity more than inorganic fertilizer pellets: a test on multiple trophic levels in streamside experimental channels.
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鲑鱼尸体比无机肥料颗粒更能提高河流生产力：对河边实验渠道的多个营养水平进行的测试。
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发表时间：
2010
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通讯作者：
D. T. Chaloner
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作者：
M. Wipfli;J. Hudson;J. Caouette;N. Mitchell;Joanna L. Lessard;R. Heintz;D. T. Chaloner
摘要对溪流进行无机营养补充剂被认为是在北美西海岸重建营养物质和溪流生产力的可能恢复策略，那里的鲑鱼捕捞和相关的海生营养补贴已经下降。在一项中游实验中，我们研究了人工营养颗粒和鲑鱼身体的短期(6周)比较效果，分别是单独(低剂量和高剂量)和联合使用，对溪流食物网的影响。响应变量包括溶解营养物质浓度、生物膜无灰干质量(AFDM)和叶绿素-a水平、大型无脊椎动物密度、黑线三文鱼幼鱼的生长和身体状况、无脊椎动物和幼体大马哈鱼的全身脂肪含量。大多数响应变量都受到屠体处理的显著影响，唯一受化肥颗粒处理显著影响的响应变量是可溶性活性磷(SRP)浓度。氨氮冷凝物。
Abstract Inorganic nutrient amendments to streams are viewed as possible restoration strategies for re-establishing nutrients and stream productivity throughout the western coast of North America, where salmon runs and associated marine-derived nutrient subsidies have declined. In a mesocosm experiment, we examined the short-term (6 weeks) comparative effects of artificial nutrient pellets and salmon carcasses, alone (low and high amounts) and in combination, on stream food webs. Response variables included dissolved nutrient concentrations, biofilm ash-free dry mass (AFDM) and chlorophyll-a levels, macroinvertebrate density, growth and body condition of juvenile coho salmon Oncorhynchus kisutch, and whole-body lipid content of invertebrates and juvenile coho salmon. Most of the response variables were significantly influenced by carcass treatment; the only response variable significantly influenced by fertilizer pellet treatment was soluble reactive phosphorus (SRP) concentration. Ammonium-nitrogen conce...