L1 East Transect – 2015

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Detailed Description

Permanent Site: L1 East Transect; Depth: 11.6 Meters (38.0 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 4 years post-dam removal; Lat/Long: 48.13957527,-123.59359993; Site Description: This transect is medium depth. Substrate is mainly fine sediment/sand/mud with a few scattered boulders (1:15 seconds). Seaweed has returned. Seven species of brown seaweed are present, mainly the acid kelp Desmarestia (0:05, 0:26 seconds) but also Costaria costata (0:19, 1:36 seconds), bull kelp Nereocystis luetkeana (0:18 seconds) and Agarum fimbriatum growing on boulders (2:06 seconds). A white batch of eggs from the squid Loligo opalescens can be seen attached to a rock at 0:24 seconds. Invertebrates seen on video: rough piddock Zirfaea pilsbryi (siphon on left at 0:36 seconds); hermit crab Pagurus ochotensis (0:47 seconds); staghorn bryozoan Heteropora pacifica (yellow clumps on boulder at 1:15 seconds); giant sea cucumber Parastichopus californicus (1:16 seconds).


Date Taken:

Length: 00:02:16

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)