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After the FiresThe Ecology of Change in Yellowstone National Park$
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Linda L. Wallace

Print publication date: 2004

Print ISBN-13: 9780300100488

Published to Yale Scholarship Online: October 2013

DOI: 10.12987/yale/9780300100488.001.0001

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Food Web Dynamics in Yellowstone Streams: Shifts in the Trophic Basis of a Stream Food Web After Wildfire Disturbance

Food Web Dynamics in Yellowstone Streams: Shifts in the Trophic Basis of a Stream Food Web After Wildfire Disturbance

Chapter:
(p.189) Chapter 9 Food Web Dynamics in Yellowstone Streams: Shifts in the Trophic Basis of a Stream Food Web After Wildfire Disturbance
Source:
After the Fires
Author(s):

Timothy B. Mihuc

Publisher:
Yale University Press
DOI:10.12987/yale/9780300100488.003.0009

This chapter describes the shifts in the trophic basis of a stream food web after wildfire disturbance in Yellowstone streams. Wildfire can affect lotic systems at temporal scales ranging from days to decades and spatial scales ranging from microhabitats to entire watersheds. Impacts on aquatic food webs include the short- and long-term alteration of resource pathways in post-fire streams. A shift in trophic energy from detrital to grazing pathways in streams following wildfire has been predicted. Consumer-resource pathways were determined in two second-order Yellowstone National Park streams in the summer of 1990 and 1991 to characterize trophic pathways after the 1998 wildfires. The relative contribution of autochthonous and allochthonous resources to primary consumer biomass was determined in the reference and burned stream using the generalist trophic dynamic model.

Keywords:   Yellowstone streams, food web dynamics, trophic basis, wildfire, aquatic food webs

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