Soft Bottom SAV (eelgrass)

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Presentation transcript:

Soft Bottom SAV (eelgrass) Subtidal Community Soft Bottom SAV (eelgrass)

Figure 10.22

Subtidal Zone The part of the continental shelf that is always covered by water from the low tide mark to the shelf break (150m or 490 ft)

Subtidal Zone Temperature varies from place to place due to its shallowness Bottom still affected by waves, tides and currents Very productive areas – nutrients & light

Subtidal Zone Soft Bottom Communites Hard Bottom Communites Seagrass Beds (NOW) Hard Bottom Communites Kelp Forests (previously viewed)

Seagrass Beds Develop in sheltered shallow water Most species prefer warm waters Turtle Grass Some are found in colder areas Eelgrass (Zostera marina) our local species

Figure 13.17

Ecological Targets Seagrass Meadows Hard Clams

Seagrass Beds Slow down currents Increase the depositing of sediments Have roots - can absorb nutrients from the sediment

Seagrass Beds Important nursery for juvenile animals Bay scallop on Long Island

Fig. 13.18

Figure 13.16 Generalized food web in a seagrass community

…go to… SAV ppt SAV/Fire Island ppt SAV/Global Climate Change ppt