Western Fisheries Research Center

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Filter Total Items: 343
Scientists kneeling in water, taking samples
April 29, 2013

Collecting Benthic Invertebrates

USGS scientists, Steve Rubin and Karl Stenberg, collecting samples to determine the distribution of benthic invertebrates in the Skagit River delta during an extreme low-tide. Information on the distribution and abundance of invertebrates will help resource managers better understand how fish, such as Chinook salmon use the delta.

Sample bottles from pump sampler on the Elwha River
February 1, 2013

Sample bottles from pump sampler on the Elwha River

Sample bottle carousel from automated ISCO pump sampler deployed on the Elwha River, Washington to obtain suspended sediment samples.

Southwestern Willow Flycatcher habitat along the Upper Gila River, Arizona. 
October 31, 2012

Southwestern Willow Flycatcher habitat along the Upper Gila River, AZ.

Southwestern Willow Flycatcher habitat along the Upper Gila River, Arizona. 

August 25, 2012

L1 West Transect – 2012

Permanent Site: L1 West Transect; Depth: 11.2 Meters (36.6 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13957527,-123.59427175; Site Description: This permanent site was only established post dam-removal after it was discovered that the degree of seaweed loss was more extensive than

August 25, 2012

L1 East Transect – 2012

Permanent Site: L1 East Transect; Depth: 11.0 Meters (36.2 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13957527,-123.59359993; Site Description: This permanent site was only established post dam-removal after it was discovered that the degree of seaweed loss was more extensive than

August 24, 2012

K1 East Transect – 2012

Permanent Site: K1 East Transect; Depth: 6.5 Meters (21.4 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13592923,-123.5101581; Site Description: This permanent transect was only established post dam-removal after it was discovered that the degree of seaweed loss was more extensive than

August 24, 2012

H2 West Transect – 2012

Permanent Site: H2 West Transect; Depth: 7.7 Meters (25.1 Feet); Distance from river mouth: 2.6 Kilometers (1.6 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15008216,-123.53277857; Site Description: This site is medium to shallow depth. Substrate is mainly gravel with some sand, cobble and an occasional boulder and has not changed since dam

August 24, 2012

K1 West Transect – 2012

Permanent Site: K1 West Transect; Depth: 6.1 Meters (19.9 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13592923,-123.51082988; Site Description: This permanent transect was only established post dam-removal after it was discovered that the degree of seaweed loss was more extensive than

Dendronotid nudibranch on hydroids
August 24, 2012

Dendronotid nudibranch on hydroids

Dendronotid nudibranch on hydroids - Scuba divers from the U.S. Geological Survey’s Western Fisheries Research Center, Washington Sea Grant, EPA and the Lower Elwha Klallam Tribe collected data and images from a long-term study of the Elwha River dam removals and the resulting effects on the nearshore ecosystem.

Location: Strait of

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August 23, 2012

D2 East Transect – 2012

Permanent Site: D2 East Transect; Depth: 12.0 Meters (39.5 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15233001,-123.56829403; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some sand. Seaweeds are now mostly gone except for the perennial

August 22, 2012

4SP1 West Transect – 2012

Permanent Site: 4SP1 - West Transect; Depth: 6.3 Meters (20.8 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 11 months post-dam removal; Lat/Long: 48.15257, -123.557376; Site Description: Substrate has remained the same (gravel/cobble) but site is largely devoid of all annual species of seaweeds. Only remaining seaweeds are the

August 21, 2012

J1 East Transect – 2012

Permanent Site: J1 East Transect; Depth: 9.1 Meters (30.0 Feet); Distance from river mouth: 6.7 Kilometers (4.1 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13607725,-123.47935008; Site Description: This permanent transect was only established post dam-removal after it was discovered that the degree of seaweed loss was more extensive than