scholarly journals Robust Recolonization of Pacific Lamprey Following Dam Removals

2020 ◽  
Author(s):  
Jon E. Hess ◽  
Rebecca L. Paradis ◽  
Mary L. Moser ◽  
Laurie A. Weitkamp ◽  
Thomas A. Delomas ◽  
...  
Keyword(s):  
Pacific Lamprey ◽  
Dam Removals

scholarly journals Watershed Suspended Sediment Supply and Potential Impacts of Dam Removals for an Estuary

2021 ◽  
Author(s):  
David K. Ralston ◽  
Brian Yellen ◽  
Jonathan D. Woodruff
Keyword(s):  
Suspended Sediment ◽  
River Estuary ◽  
Dam Removal ◽  
Hudson River ◽  
Sediment Traps ◽  
Sediment Supply ◽  
Watershed Area ◽  
Natural Lakes ◽  
Sediment Deposits ◽  
Dam Removals

AbstractObservations and modeling are used to assess potential impacts of sediment releases due to dam removals on the Hudson River estuary. Watershed sediment loads are calculated based on sediment-discharge rating curves for gauges covering 80% of the watershed area. The annual average sediment load to the estuary is 1.2 Mt, of which about 0.6 Mt comes from side tributaries. Sediment yield varies inversely with watershed area, with regional trends that are consistent with substrate erodibility. Geophysical and sedimentological surveys in seven subwatersheds of the Lower Hudson were conducted to estimate the mass and composition of sediment trapped behind dams. Impoundments were classified as (1) active sediment traps, (2) run-of-river sites not actively trapping sediment, and (3) dammed natural lakes and spring-fed ponds. Based on this categorization and impoundment attributes from a dam inventory database, the total mass of impounded sediment in the Lower Hudson watershed is estimated as 4.9 ± 1.9 Mt. This represents about 4 years of annual watershed supply, which is small compared with some individual dam removals and is not practically available given current dam removal rates. More than half of dams impound drainage areas less than 1 km2, and play little role in downstream sediment supply. In modeling of a simulated dam removal, suspended sediment in the estuary increases modestly near the source during discharge events, but otherwise effects on suspended sediment are minimal. Fine-grained sediment deposits broadly along the estuary and coarser sediment deposits near the source, with transport distance inversely related to settling velocity.

Socioeconomic and Institutional Dimensions of Dam Removals: The Wisconsin Experience

1998 ◽  
Vol 22 (3) ◽  
pp. 359-370 ◽  
Author(s):  
Stephen M. Born ◽  
Kenneth D. Genskow ◽  
Timothy L. Filbert ◽  
Nuria Hernandez-Mora ◽  
Matthew L. Keefer ◽  
...  
Keyword(s):  
Dam Removals

scholarly journals Dam Removal Information Portal (DRIP)—A map-based resource linking scientific studies and associated geospatial information about dam removals

2016 ◽  
Author(s):  
Jeffrey J. Duda ◽  
Daniel J. Wieferich ◽  
R. Sky Bristol ◽  
J. Ryan Bellmore ◽  
Vivian B. Hutchison ◽  
...  
Keyword(s):  
Dam Removal ◽  
Geospatial Information ◽  
Information Portal ◽  
Dam Removals

scholarly journals Behavioral Responses of Pacific Lamprey to Alarm Cues.

2017 ◽  
Author(s):  
Laurie L. Porter ◽  
Mike Hayes ◽  
Aaron D. Jackson ◽  
Mary L. Moser ◽  
Brian J. Burke ◽  
...  
Keyword(s):  
Behavioral Responses ◽  
Alarm Cues ◽  
Pacific Lamprey

Using hydraulic modeling to address social impacts of small dam removals in southern New Jersey

2009 ◽  
Vol 90 ◽  
pp. S270-S278 ◽  
Author(s):  
Joshua R. Wyrick ◽  
Brian A. Rischman ◽  
Christopher A. Burke ◽  
Craig McGee ◽  
Chasity Williams
Keyword(s):  
New Jersey ◽  
Hydraulic Modeling ◽  
Social Impacts ◽  
Dam Removals

BIOLOGICAL TURBULENCE INTENSITY INDEX FOR PACIFIC LAMPREY PASSAGE OF ARTIFICIAL FISHWAYS

2019 ◽  
Author(s):  
CHANNING C SYMS ◽  
MARK A KIRK ◽  
DANIELE TONINA ◽  
CHISTOPHER C CAUDILL
Keyword(s):  
Turbulence Intensity ◽  
Pacific Lamprey ◽  
Intensity Index

Low Mortality of Larval Lampreys from Electrofishing, Suction-pumping, Anesthesia, and Handling

2017 ◽  
Vol 8 (2) ◽  
pp. 640-647 ◽  
Author(s):  
Jeffrey C. Jolley ◽  
Christina T. Uh ◽  
Gregory S. Silver ◽  
Timothy A. Whitesel
Keyword(s):  
Pacific Northwest ◽  
Control Group ◽  
Long Term Effects ◽  
Negative Effects ◽  
Short Term ◽  
Important Species ◽  
Pacific Lamprey ◽  
The Pacific ◽  
Delayed Mortality

Abstract Native lamprey populations are declining worldwide. In the Pacific Northwest focus on conservation and management of these ecologically and culturally important species has increased. Concern has emerged regarding the effects of sampling and handling of lamprey, with little to no attention given to the larval lifestage. We monitored the survival of larval Pacific Lamprey Entosphenus tridentatus and Lampetra spp. after backpack electrofishing, deepwater electrofishing and suction-pumping, anesthesia, and handling. We performed survival trials on wild-caught lamprey (n = 15 larvae in each trial) collected from the Clackamas River drainage in Oregon, USA, coupled with control group trials from lamprey sourced from a hatchery (n = 10 larvae). Short-term (96 h) survival was >98% with only one observed mortality. Delayed mortality (1 wk) was observed for four individuals that had fungus; two of those were positive for the bacteria Aeromonas hyrdrophila. We recorded blood hematocrit as a secondary measure of stress. The baseline, nonstressed larvae hematocrit levels did not differ from those of fish that had undergone stress through electrofishing, suction-pumping, and handling without anesthesia. Electrofishing, suction-pumping, and anesthesia showed no short-term negative effects on larval lamprey although potential long-term effects remain unstudied. These techniques appear to provide efficient and relatively safe methods for collecting and surveying larval lamprey.

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