H1 East Transect – February 2017

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Detailed Description

Permanent Site: H1 East Transect; Depth: 5.8 Meters (19.1 Feet); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 6 years post-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate remains mainly gravel with some sand, cobble and an occasional boulder. In 2017 surveys were conducted monthly for 6 months (Feb-July) to observe seaweed growth throughout the main growing season. At this point in the growing season only a few small brown seaweeds were seen except for the perennial seaweed Pterygophora californica (0:09, 0:17, 0:30 seconds). A large kelp crab (Pugettia producta) can be seen on the right at 1:56 seconds.


Date Taken:

Length: 00:02:01

Location Taken: Elwha River, WA, US

Video Credits

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