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H1 East Transect – 2016

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Detailed Description

Permanent Site: H1 East Transect; Depth: 5.7 Meters (18.8 Feet); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 5 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 is still mainly gravel with some sand and cobble. Seaweed growth of both reds (1:32 seconds) and browns is profuse and appears to be at pre-dam removal levels. Seven different species of brown seaweeds are present with the three most abundant being Alaria marginata (0:23, 1:56 seconds), three-ribbed kelp Cymathere triplicata (0:34, 0:42 seconds) and the perennial seaweed Pterygophora californica (2:54 seconds). Horse clams (Tresus capax) were still abundant. A large kelp crab (Pugettia producta) can be seen sitting on top of a Pterygophora stalk at 1:32 seconds.




Public Domain.