The Kuparuk River, an arctic stream ecosystem on the North Slope of Alaska.

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The Kuparuk River flows to the Arctic Ocean from the foothills of the Brooks Range, seen to the south in the background. The Kuparuk River was experimentally enriched with phosphorus every summer from 1983 to 1998 as a part of the Toolik Lake Long-Term Ecological Research (LTER) project. The purpose of the experiment was to evaluate the long-term effects of eutrophication on an arctic tundra stream. During the 16 years of phosphorus additions, a dramatic change was observed in the community structure and at all trophic levels. This photograph originally appeared on the cover of Ecology (85:4) in April of 2004.

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Primary or BEN resource type	Photograph
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Format	jpeg
Temporal and geographic description	Kuparuk River, North Slope of Alaska. Photograph taken in July.
Ecological Core Concept	The science of ecology -- Scientific method and experimental design The science of ecology Ecosystems -- Biogeochemical cycling Ecosystems
Drought & Water-Ecosystem Services Collection	Off
Conservation Targets Under Global Change Collection	Off
Big Data Collection	Off
Editor's Choice	No
Audience	Undergraduate upper division 15-16 Undergraduate lower division 13-14
Pedagogical Use Description	This photograph can be used to illustrate an arctic stream, the North Slope of Alaska, freshwater ecosystems, or long-term experiments.
Keywords	Kuparuk River, Brooks Range, enriched, phosphorus, Toolik Lake Long-Term Ecological Research, LTER, eutrophication, arctic, tundra, stream
Life science discipline (subject)	Ecology
Primary Author Controlled Name	Jonathan Benstead
Primary Author Affiliation	University of Alabama
Primary Author email	jbenstead@bama.ua.edu
Rights	Copyright 2004 by the Ecological Society of America.
Resource Editor	Unknown
Reviewer A	Unknown
Reviewer B	Unknown
Date Of Record Submission	2008-04-02

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