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F2 East Transect – 2012

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Detailed Description

Permanent Site: F2 East Transect; Depth: 11.7 Meters (38.3 Feet); Distance from river mouth: 1.5 Kilometers (0.9 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15672004,-123.54969397; Site Description: Substrate is mainly gravel mixed with a little cobble and an occasional boulder. Only remaining seaweeds are reds (0:10, 0:24 seconds) and the dead stalks of the perennial seaweed Pterygophora californica (0:45, 1:34 seconds). A variety of invertebrates are present with the most common being lined chitons (Tonicella spp.) and Pandalus shrimp. The yellow blotches seen on rocks throughout the video are encrusting bryozoans (0:54, 1:12 seconds) and the large yellow blotch at 0:44 seconds is an encrusting sponge. Many of the rocks that used to be covered by seaweeds now have fan hydroids growing on them. An example is seen left of the tape at 1:26 seconds. Other invertebrates seen on video: sunflower sea star Pycnopodia helianthoides (0:06, 1:17 seconds).




Public Domain.