H2 West Transect – 2014

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Detailed Description

Permanent Site: H2 West Transect; Depth: 7.7 Meters (25.2 Feet); Distance from river mouth: 2.6 Kilometers (1.6 Miles) east; Pre/Post Dam Removal: 3 years 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 removal. Density of seaweed is still greatly decreased and mainly consists of large and small reds (0:12, 0:46 seconds), the perennial seaweed Pterygophora californica (0:52, 1:24 seconds) and a few Saccharina (0:19 seconds). The surveys were conducted in the middle of July and likely missed some of the late summer growth of the brown algae (see video: H1 West Transect 2014). Horse clams (Tresus capax) have become abundant. Invertebrates seen on video: several blood sea stars Henricia leviuscula leviuscula (dark orange) on a boulder covered in sponges (light orange) and Pterygophora stipes (1:08 seconds); sand-rose anemone Urticina columbiana (0:39 seconds).


Date Taken:

Length: 00:01:28

Lat / Long: 48.150082160000 / -123.532778570000

Location Taken: US

Video Credits

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