GP2 West Transect – 2013

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Detailed Description

Permanent Control Site: GP2 West Transect; Depth: 12.3 Meters (40.4 Feet); Distance from river mouth: 18.8 Kilometers (11.6 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.12781102,-123.31712832; Site Description: This site was established as the eastern control. Substrate is mainly a gravel/sand/cobble mixture surrounding boulders. Red, green and brown seaweed is present though growth is less dense than at shallower sights and previous years. Five species of browns were recorded including Agarum fimbriatum (0:18, 1:47 seconds) growing on the boulders, Saccharina spp. (0:49, 1:14seconds) and the perennial seaweed Pterygophora californica (0:12, 0:33seconds). Also growing on boulders were yellow, encrusting bryozoans and pink coralline algae (0:15, 0:37 seconds). A variety of invertebrates were present but none were abundant. Invertebrates seen on video: sunflower sea star Pycnopodia helianthoides (0:34, 1:33, 1:45 seconds), blood sea star Henricia leviuscula leviuscula (1:03 seconds), mottled sea star Evasterias troschelii (1:29 seconds), giant sea cucumber Parastichopus californicus (1:52 seconds), egg case of the moon snail Euspira lewisii (1:57, 1:59 seconds).
 

Details

Date Taken:

Length: 00:02:13

Lat / Long: 48.127811020000 / -123.317128320000

Location Taken: US

Video Credits

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

Transcript

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