Parent Layer: Environmental Geologic Atlas

Name: Environments and Biologic Assemblages Map

Display Field: Environment

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <p>This layer characterizes bottom-living plants and animals in Galveston Bay and principal plant communities within the park. </p><dl><dt>Grassflats</dt><dd>Shallow bay margin with dense grasses, moderately diverse mollusk assemblage, depth <5 feet.</dd><dt>Bay with Reef</dt><dd>Enclosed bay with reef, away from tidal or river influence, mottled mud, high species diversity, infauna, mollusks, scattered clumps of oyster reefs, depth 3 to 8 feet.</dd><dt>Fresh to brackish-water bodies</dt><dd>Land-locked ponds and lakes, variable substrates, coastal bodies temporarily brackish or saline</dd><dt>Beach</dt><dd>Low tide to 5 feet above sea level, beach, swash zone, high energy, sand, shell debris infauna, back-beach sea-oats and halophytes, dunes, ghost crab. </dd><dt>Barrier flat and dune</dt><dd>vegetated barrier flat, foredune ridge, beach ridge, and vegetated flat, relief 5 to 15 feet, salt-tolerant grasses, rare mesquite and live oak-trees, ghost crab, small rodents, snakes, fowl.</dd><dt>Tidal flats</dt><dd>Sandflats, a few inches above mean sea level, undulatory sand surface with blue-green algal mats, thin halite film, marsh plants rare</dd><dt>Salt-water marsh</dt><dd>Salt-water marsh, frequently inundated by tides, sand, muddy sand to mud, cordgrass, glasswort, seepweed, sea-oxeye, mammals, fowl.</dd></dl>

Copyright Text:

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