Canopy closure after four decades of postlogging riparian forest regeneration reduces cutthroat trout biomass in headwater streams through bottom-up pathways

摘要: Recovery from timber harvest is widespread across North America, but few studies have evaluated long-term stream responses to riparian harvest. We revisited five reach pairs where in 1976, periphyton chlorophyll a, predatory invertebrate biomass, and cutthroat trout (Oncorhynchus clarkii clarkii) biomass were elevated reaches canopies more open following After four decades of regeneration, mean canopy openness, declined harvested relative paired old-growth reference reaches. In one pair, the remained than control reach. accordance with hypothesis that light exerts strong controls on predator via bottom-up processes these forested headwaters, was also greater this pair 2014. Changes large wood pool area over time interval do not account for i...