Conceptualizing ecological responses to dam removal: If you remove it, what's to come?

BioScience
By: , and 

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Abstract

One of the desired outcomes of dam decommissioning and removal is the recovery of aquatic and riparian ecosystems. To investigate this common objective, we synthesized information from empirical studies and ecological theory into conceptual models that depict key physical and biological links driving ecological responses to removing dams. We define models for three distinct spatial domains: upstream of the former reservoir, within the reservoir, and downstream of the removed dam. Emerging from these models are response trajectories that clarify potential pathways of ecological transitions in each domain. We illustrate that the responses are controlled by multiple causal pathways and feedback loops among physical and biological components of the ecosystem, creating recovery trajectories that are dynamic and nonlinear. In most cases, short-term effects are typically followed by longer-term responses that bring ecosystems to new and frequently predictable ecological condition, which may or may not be similar to what existed prior to impoundment.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Conceptualizing ecological responses to dam removal: If you remove it, what's to come?
Series title BioScience
DOI 10.1093/biosci/biy152
Volume 69
Issue 1
Year Published 2019
Language English
Publisher Oxford Academic
Contributing office(s) Pacific Coastal and Marine Science Center
Description 14 p.
First page 26
Last page 39