L1 East Transect – 2016

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Detailed Description

Permanent Site: L1 East Transect; Depth: 11.4 Meters (37.4 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 5 years post-dam removal; Lat/Long: 48.13957527,-123.59359993; Site Description: This transect is medium depth. Substrate is mainly fine sediment/sand/mud covered in a layer of brown diatoms (0:39 seconds). Scattered boulders are present (1:02seconds). Seven species of brown seaweed are present, mainly the acid kelp Desmarestia (0:14 seconds) but also Costaria costata (1:13 seconds), bull kelp Nereocystis luetkeana (0:33, 2:06 seconds) and Agarum fimbriatum (1:53 seconds). Invertebrates seen on video: sand-rose anemone Urticina columbiana (0:30 seconds); graceful crab Metacarcinus gracilis (0:38 seconds); orange sea cucumber Cucumaria miniata (0:54 seconds); staghorn bryozoan Heteropora pacifica (yellow clumps on boulder at 1:36 seconds).


Date Taken:

Length: 00:02:27

Lat / Long: 48.139575270000 / -123.593599930000

Location Taken: US

Video Credits

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