Nutrient additions to mitigate for loss of Pacific salmon: consequences for stream biofilm and nutrient dynamics
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چکیده
منابع مشابه
Nutrient additions to mitigate for loss of Pacific salmon: consequences for stream biofilm and nutrient dynamics
Mitigation activities designed to supplement nutrient and organic matter inputs to streams experiencing decline or loss of Pacific salmon typically presuppose that an important pathway by which salmon nutrients are moved to fish (anadromous and/or resident) is via nutrient incorporation by biofilms and subsequent bottom-up stimulation of biofilm production, which is nutrient-limited in many eco...
متن کاملSeparating physical disturbance and nutrient enrichment caused by Pacific salmon in stream ecosystems
1. Pacific salmon (Oncorhynchus spp.) deliver marine-derived nutrients to the streams in which they spawn and die, and these resource subsidies can increase the abundance of stream biota. In strong contrast, physical disturbance from salmon spawning activity can reduce the abundance of benthic organisms. Previous experimental designs have not established the relative effects of these two contra...
متن کاملThe ecological consequences of unpalatable prey: phytoplankton response to nutrient and predator additions
Recent theoretical and laboratory studies have suggested that unpalatable prey modify the degree to which trophic levels are regulated by bottom-up or top-down forces such that primarily edible communities are regulated by predation and primarily unpalatable communities are regulated by resource supply. Despite the hypothesised importance of prey edibility, experiments have only rarely examined...
متن کاملSeasonal response of stream biofilm communities to dissolved organic matter and nutrient enrichments.
Dissolved organic matter (DOM) and inorganic nutrients may affect microbial communities in streams, but little is known about the impact of these factors on specific taxa within bacterial assemblages in biofilms. In this study, nutrient diffusing artificial substrates were used to examine bacterial responses to DOM (i.e., glucose, leaf leachate, and algal exudates) and inorganic nutrients (nitr...
متن کاملNutrient enrichment alters the consequences of species loss
Nessa E. O’Connor*, Matthew E. S. Bracken, Tasman P. Crowe and Ian Donohue School of Biological Sciences, Queen’s University Belfast, Belfast BT 9 7BL, UK; Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA 92697, USA; School of Biology and Environmental Science, University College Dublin, Dublin, Ireland; School of Natural Sciences, Department of Zoology, Trinity Col...
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ژورنال
عنوان ژورنال: Ecosphere
سال: 2014
ISSN: 2150-8925
DOI: 10.1890/es13-00366.1