A Comparison of Brook Trout Passage at Road Culverts to Broadscale Assessment Criteria in a Pennsylvania Headwater Stream

2021 ◽  
Author(s):  
Karli M. Rogers ◽  
Shawn M. Rummel ◽  
Kathleen M. Lavelle ◽  
Joseph E. Duchamp ◽  
Jonathan M. Niles ◽  
...  
Keyword(s):  
Brook Trout ◽  
Headwater Stream ◽  
Assessment Criteria

Ontogenetic and diel variation in stream habitat use by brook trout (Salvelinus fontinalis) in a headwater stream

2011 ◽  
Vol 26 (1) ◽  
pp. 143-152 ◽  
Author(s):  
James H. Johnson ◽  
Robert M. Ross ◽  
David S. Dropkin ◽  
Lori A. Redell
Keyword(s):  
Habitat Use ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Headwater Stream ◽  
Stream Habitat ◽  
Diel Variation

Spatial variability in adult brook trout (Salvelinus fontinalis) survival within two intensively surveyed headwater stream networks

2014 ◽  
Vol 71 (7) ◽  
pp. 1010-1019 ◽  
Author(s):  
Yoichiro Kanno ◽  
Benjamin H. Letcher ◽  
Jason C. Vokoun ◽  
Elise F. Zipkin
Keyword(s):  
Spatial Variability ◽  
Count Data ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Survival Rates ◽  
Headwater Stream ◽  
The Other ◽  
Stream Networks ◽  
Open Population ◽  
Demographic Rates

Headwater stream networks are considered heterogeneous riverscapes, but it is challenging to characterize spatial variability in demographic rates. We estimated site-scale (50 m) survival of adult (>age 1+) brook trout (Salvelinus fontinalis) within two intensively surveyed headwater stream networks by applying an open-population N-mixture approach to count data collected over two consecutive summers. The estimated annual apparent survival rate was 0.37 (95% CI: 0.28–0.46) in one network and 0.31 (95% CI: 0.15–0.45) in the other network. In both networks, trout survival was higher in stream sites characterized by more abundant pool habitats. Trout survival was negatively associated with mean depth in one network and positively associated with stream gradient in the other. Stream temperature was not related to trout survival in either network, possibly because the majority of sites were thermally suitable. A similar analytical approach can be useful for inferring survival rates when count data are available over space and time but individual tagging is not feasible.

Environmental Factors Affecting Brook Trout Occurrence in Headwater Stream Segments

2015 ◽  
Vol 144 (2) ◽  
pp. 373-382 ◽  
Author(s):  
Yoichiro Kanno ◽  
Benjamin H. Letcher ◽  
Ana L. Rosner ◽  
Kyle P. O’Neil ◽  
Keith H. Nislow
Keyword(s):  
Environmental Factors ◽  
Brook Trout ◽  
Headwater Stream ◽  
Factors Affecting

Differences in an ensemble of streamside salamanders (Plethodontidae) above and below a barrier to brook trout

1997 ◽  
Vol 18 (1) ◽  
pp. 15-25 ◽  
Author(s):  
William J. Resetarits
Keyword(s):  
Species Composition ◽  
Size Distribution ◽  
Relative Abundance ◽  
Brook Trout ◽  
Headwater Stream ◽  
Size Distributions ◽  
Ecological Interactions ◽  
Relative Abundances

AbstractI examined the species composition, relative abundances, and size distributions of an ensemble of streamside salamanders in two contiguous sections of an Appalachian headwater stream: one containing brook trout and one that was trout free. The two stream sections were separated by a natural waterfall that formed a permanent barrier to the upstream movement of fish. The two stream sections differed in the overall abundance of salamanders, the relative abundance of the six species present, and the size-distribution of the salamander ensemble. These results suggest that brook trout have an effect on the structure of co-occurring ensembles of salamanders, and that the continued coexistence of stream salamanders with brook trout does not indicate lack of strong ecological interactions.

Short-Term Effects of Beaver Dam Removal on Brook Trout in an Appalachian Headwater Stream

2013 ◽  
Vol 20 (3) ◽  
pp. 540-551 ◽  
Author(s):  
Jonathan M. Niles ◽  
Kyle J. Hartman ◽  
Patrick Keyser
Keyword(s):  
Brook Trout ◽  
Dam Removal ◽  
Headwater Stream ◽  
Short Term ◽  
Beaver Dam ◽  
Short Term Effects

Transformation of assessment criteria for lands withdrawn from agricultural use due to radioactive contamination

2020 ◽  
Vol 0 (6) ◽  
pp. 24-30
Author(s):  
Olga Merzlova
Keyword(s):  
Economic Evaluation ◽  
Radioactive Contamination ◽  
Chernobyl Accident ◽  
Assessment Criteria ◽  
Contaminated Land ◽  
Criteria And Indicators ◽  
Agricultural Use ◽  
Natural Decay

One of the measures to eliminate the consequences of the Chernobyl accident was the exclusion of highly contaminated land from agricultural use. During the natural decay of radionuclides there is a decrease in the activity of 137Cs and 90Sr in the soil. The issue of land return becomes relevant. The article describes the main stages of formation of the system of criteria and indicators of ecological and economic evaluation of the expediency of land return. The first part of the article is devoted to the issue of radiological evalation.

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