Survey of microhabitats and fauna at Garrison Bay
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Garrison Bay looking west from the Howe property toward the island |
The environment at Garrison Bay consists generally of a shallowly dipping shore face of intermixed fine-grained sediment and molluscan shell material. Within this apparently homogeneous environment a number of microhabitats can be recognized.
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Rocky substrate with large Balanus |
Lottia sp. on small cobbles in the upper intertidal |
Haliclona permollis |
Gull on bedrock exposure, which is littered with light-colored broken shell material |
Wooden planks and pilings associated with docks in Garrison Bay provide substrates for epifaunal organisms such as tube-dwelling polychaetes (F. Sabellidae), and mussels (Mytilus sp.). Tree branches and trunks along the bay margins provide additional (if somewhat ephemeral) woody substrates for these organisms as well as barnacles (Balanus sp.). Egg masses of the bubble snail Haminoea vesicula are also found in association with partially emergent branches in the lower intertidal. |
Egg masses of Haminoea vesicula |
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