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Alaska's Changing ArcticEcological Consequences for Tundra, Streams, and Lakes$
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John E. Hobbie and George W. Kling

Print publication date: 2014

Print ISBN-13: 9780199860401

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199860401.001.0001

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Ecology of Streams of the Toolik Region

Ecology of Streams of the Toolik Region

(p.173) 7 Ecology of Streams of the Toolik Region
Alaska's Changing Arctic

William B. Bowden

Bruce J. Peterson

Linda A. Deegan

Alex D. Huryn

Jonathan P. Benstead

Heidi Golden

Michael Kendrick

Stephanie M. Parker

Elissa Schuett

Joseph J. Vallino

John E. Hobbie

Oxford University Press

This chapter examines the basic ecology of streams in the Toolik Region. It provides information gathered from monitoring year-to-year variability and to identify long-term changes in the ecology of streams. It looks into the importance of understanding the role nutrients have in limiting and structuring stream ecosystems. It describes the ecological characteristics of the five types of arctic streams in the Toolik region, including biogeochemistry, primary producers, microheterotrophs, and secondary producers. It enumerates details of three stream-fertilization experiments that provide the basis of past and current research. It combines the research results under six themes: resource limitation; recovery from nutrient enrichment; trophic cascades; hyporheic processes; disturbance as a driver; and how warming leads to changes in permafrost and thermokarst.

Keywords:   Toolik region, stream ecosystems, biogeochemistry, microheterotrophs, trophic cascades, hyporheic processes, permafrost, thermokarst

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