H2 East Transect – 2012

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Detailed Description

Permanent Site: H2 East Transect; Depth: 7.9 Meters (26.0 Feet); Distance from river mouth: 2.6 Kilometers (1.6 Miles) east; Pre/Post Dam Removal: 10 months 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. Density of seaweed has greatly decreased. Reds remain (0:21, 0:37 seconds) but most are very small (0:19 seconds). Only a few browns remain, mainly the perennial seaweed Pterygophora californica (0:09, 0:52 seconds) and a few Saccharina (1:08, 1:42 seconds). Very small bull kelp Nereocystis luetkeana (1:52seconds) were noted. Invertebrates seen on video: glassy plume hydroid Plumularia setacea (orange growth on Pterygophora stipe at 0:51seconds); sand-rose anemone Urticina columbiana (1:15 seconds); sunflower sea star Pycnopodia helianthoides (1:04, 1:22 seconds).


Date Taken:

Length: 00:02:14

Lat / Long: 48.150082160000 / -123.532106610000

Location Taken: US

Video Credits

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