Biotic and Abiotic Influences on Abundance and Distribution of Nonnative Chinook Salmon and Native ESA-Listed Steelhead in the Wind River, Washington

Jezorek, Ian G.; Connolly, Patrick J.

doi:10.3955/046.089.0105

Cited by 1 publication

(1 citation statement)

References 48 publications

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“…So far, however, none of these introduced species have been observed by moderate to intensive monitoring efforts above the former Condit (Allen and Connolly, 2011) Creek is now vulnerable to settlement by nonnative spring Chinook salmon (O. tshawytscha), several thousand of which pass the mouth of Trout Creek annually as they home toward their natal fish hatchery 11 rkm upstream. The concern is that these nonnative Chinook salmon may establish a population in Trout Creek and compete with native steelhead, which are the subject of a long-term and expensive restoration effort (Jezorek and Connolly, 2015). To date, spring Chinook salmon have not established a population in Trout Creek as evident from rigorous annual smolt trapping (Buehrens et al, 2014) and electrofishing (Jezorek and Connolly, 2014).…”

Section: Expansion Of Nonnative Fishmentioning

confidence: 99%

Synthesis of Common Management Concerns Associated with Dam Removal

Tullos

Collins

Bellmore

et al. 2016

J American Water Resour Assoc

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Managers make decisions regarding if and how to remove dams in spite of uncertainty surrounding physical and ecological responses, and stakeholders often raise concerns about certain negative effects, regardless of whether these concerns are warranted at a particular site. We used a dam‐removal science database supplemented with other information sources to explore seven frequently raised concerns, herein Common Management Concerns (CMCs). We investigate the occurrence of these concerns and the contributing biophysical controls. The CMCs addressed are the following: degree and rate of reservoir sediment erosion, excessive channel incision upstream of reservoirs, downstream sediment aggradation, elevated downstream turbidity, drawdown impacts on local water infrastructure, colonization of reservoir sediments by nonnative plants, and expansion of invasive fish. Biophysical controls emerged for some of the concerns, providing managers with information to assess whether a given concern is likely to occur at a site. To fully assess CMC risk, managers should concurrently evaluate site conditions and identify the ecosystem or human uses that will be negatively affected if the biophysical phenomenon producing the CMC occurs. We show how many CMCs have one or more controls in common, facilitating the identification of multiple risks at a site, and demonstrate why CMC risks should be considered in the context of other factors such as natural watershed variability and disturbance history.

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Section: Expansion Of Nonnative Fishmentioning

confidence: 99%