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L1 East Transect – 2017

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Detailed Description

Permanent Site: L1 East Transect; Depth: 11.0 Meters (36.2 Feet); Distance from river mouth: 2.3 Kilometers (1.4 Miles) west; Pre/Post Dam Removal: 6 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 (0:05 seconds). Scattered boulders are present (1:11, 2:02 seconds), covered in articulated, coralline algae, and lacy red algae. Seven species of brown seaweed are present, mainly two species of acid kelp Desmarestia (0:04, 0:21 seconds) but also Costaria costata (0:34, 0:44 seconds), bull kelp Nereocystis luetkeana a (0:10, 0:27 seconds) and Agarum fimbriatum (1:06, 1:18 seconds), which grows on the boulders. Invertebrates seen on video: sand-rose anemone Urticina columbiana (0:37 seconds); giant sea cucumber Parastichopus californicus (2:04 seconds); graceful crab Metacarcinus gracilis (half buried in sand on right at 2:16 seconds).




Public Domain.