H2 East Transect – 2017

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Detailed Description

Permanent Site: H2 East Transect; Depth: 7.6 Meters (24.8 Feet); Distance from river mouth: 2.6 Kilometers (1.6 Miles) east; Pre/Post Dam Removal: 6 years post-dam removal; Lat/Long: 48.15008216,-123.53210661; 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 removal. Seaweed growth of both reds (0:31, 1:07 seconds) and browns are pronounced and almost as much as pre-dam removal levels. Seven different species of brown seaweeds are present, with the most numerous being Saccharina spp. (0:45 seconds), three-ribbed kelp Cymathere triplicata (0:29, 1:19 seconds) and the perennial seaweed Pterygophora californica (0:34-0:39 seconds). Bull kelp Nereocystis luetkeana is present (0:57 seconds). Horse clams (Tresus capax) are still very abundant. A small sunflower sea star (Pycnopodia helianthoides) is seen at 0:24 seconds.
 

Details

Image Dimensions: 1280 x 720

Date Taken:

Length: 00:02:06

Location Taken: Elwha River, WA, US

Video Credits

Editor: Nancy Elder, Fishery Biologist, Marrowstone Marine Field Station, (nelder@usgs.gov)

Transcript

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