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Cederholm, et al.:
"As the decline of wild salmon continues throughout the Pacific Northwest, it is logical to assume that the productivity of some freshwater and terrestrial ecosystems will also decline. Decreased production could be self-perpetuating, as salmon stocks already in decline are likely to decrease further in a negative feedback loop."
Pacific Salmon and Wildlife, 2000, p 68
Notes:
“it is logical to assume” NO, the bases for the assumption need to be spelled out and then examined to see if the conclusion follows.