4SP1 East Transect – 2017

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Detailed Description

Permanent Site: 4SP1 - East Transect; Depth: 5.5 Meters (18.1 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 6 years post-dam removal; Lat/Long: 48.15257, -123.556704; Site Description: The site has converted from gravel/cobble substrate to all sand. Since 2013, seaweed has been completely absent. However, this year three species of brown seaweed were present though not abundant and included the perennial seaweed Pterygophora californica (0:30 seconds), Laminaria ephemera (0:30 seconds) and three-ribbed kelp Cymathere triplicata (1:25 seconds). No red seaweed was noted. No invertebrates were present but there was a crab trap filled with Dungeness crab Metacarcinus magister (1:40 seconds) five feet to the north of the transect edge. Though not seen on the video, schools of Pacific sand lance (Ammodytes hexapterus) were present and many of them were buried in the clean, sandy substrate.
 

Details

Image Dimensions: 1280 x 720

Date Taken:

Length: 00:01:48

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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