caa a22 4500 44589315X CHVBK 20180317145623.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10750-011-0819-9 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0819-9 Do fall additions of salmon carcasses benefit food webs in experimental streams? [Elektronische Daten] [Jeremy Cram, Peter Kiffney, Ryan Klett, Robert Edmonds] Research showing that salmon carcasses support the productivity and biodiversity of aquatic and riparian ecosystems has been conducted over a variety of spatial and temporal scales. In some studies, carcasses were manipulated in a single pulse or loading rate or manipulations occurred during summer and early fall, rather than simulating the natural dynamic of an extended spawning period, a gradient of loading rates, or testing carcass effects in late fall-early winter when some salmon stocks in the US Pacific Northwest spawn. To address these discrepancies, we manipulated salmon carcass biomass in 16 experimental channels located in the sunlit floodplain of the Cedar River, WA, USA between mid-September and mid-December, 2006. Total carcass loads ranged from 0-4.0kg/m2 (0, 0.001, 0.01, 0.1, 0.5, 1.0, 2.0 and 4.0kg/m2, n=2 per treatment) and were added to mimic the temporal dynamic of an extended spawning period. We found little evidence that carcasses influenced primary producer biomass or fish growth; however, nutrients and some primary consumer populations increased with loading rate. These effects varied through time, however. We hypothesize that the variable effects of carcasses were a result of ambient abiotic condition, such as light, temperature and disturbance that constrained trophic response. There was some evidence to suggest peak responses for primary producers and consumers occurred at a loading rate of ~1.0-2.0kg/m2, which was similar to other experimental studies conducted during summer. Springer Science+Business Media B.V., 2011 Salmon carcasses nationallicence Aquatic food web nationallicence Salmon-derived nutrients nationallicence Experimental streams nationallicence Recolonization nationallicence Cram Jeremy College of Forest Resources, University of Washington, 98195, Seattle, WA, USA aut Kiffney Peter Northwest Fisheries Science Center, Mukilteo Biological Field Station, 10 Park Avenue, Building B, 98275, Mukilteo, WA, USA aut Klett Ryan College of Forest Resources, University of Washington, 98195, Seattle, WA, USA aut Edmonds Robert College of Forest Resources, University of Washington, 98195, Seattle, WA, USA aut Hydrobiologia Springer Netherlands 675/1(2011-10-01), 197-209 0018-8158 675:1<197 2011 675 10750 https://doi.org/10.1007/s10750-011-0819-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0819-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cram Jeremy College of Forest Resources, University of Washington, 98195, Seattle, WA, USA aut NATIONALLICENCE 700 1- Kiffney Peter Northwest Fisheries Science Center, Mukilteo Biological Field Station, 10 Park Avenue, Building B, 98275, Mukilteo, WA, USA aut NATIONALLICENCE 700 1- Klett Ryan College of Forest Resources, University of Washington, 98195, Seattle, WA, USA aut NATIONALLICENCE 700 1- Edmonds Robert College of Forest Resources, University of Washington, 98195, Seattle, WA, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 675/1(2011-10-01), 197-209 0018-8158 675:1<197 2011 675 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer