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Seagrass

Close-up of Seagrass

Free Image of Seagrass

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Photographer:

Freerange Archives (CG Collection)

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Landscapes & Nature

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Sea grass with sun rays shining on ocean floor

Sea turtle grazing on the seaseabed, slow motion. Great Green Sea Turtle (Chelonia mydas) with open mouth eating green algae on seagrass meadow

Coastal sand dunes are dynamic but fragile buffer zones of sand and vegetation that form where the following three characteristics can be found: large quantities of sand persistent wind capable of moving the sand suitable locations for sand to accumulate The process of dune formation begins with a steady on-shore wind capable of moving sand. The wind moves the sand into piles. Eventually the sand pile becomes so steep that the leeward side of the sand pile collapses under its own weight and spills down at an angle that serves to stabilize the dune. Over time, the dune migrates in the direction of the wind, as the wind moves sand up the dune's slope and over the edge. Sand dunes often form around obstructions such as rocks, drift wood, decaying plant matter, and detritus that is washed up during high-tide. This decaying plant matter forms a perfect substrate for plants to set root. Plants the first set root in sand dunes are referred to as pioneer plants and are often grasses that have special adaptations for the harsh environment of the dune (high salt tolerance, waxy leaves that retain water, rolled leaves to reduce surface area and exposure to evaporation). These pioneer plants stabilize the dune. Their roots bind the sand and their leaves decrease wind speed and reduce erosion. After pioneer plants stabilize the dune, it becomes more habitable for other plants to move in. A progression of vegetation types set hold onto the dune, each changing the substrate's characteristics and structure, gradually making the dune suitable for the next vegetation type. Sand dunes, though dynamic, are fragile habitats. The mat of vegetation covering a dune is vital to reducing dune erosion and if this vegetation is disturbed or uprooted, the dune is destroyed.

Seagrasses Underwater Sea life Scuba diver point of view Sea grass Posidoniaceae

Seagrass underwater sea and blue sky with cloud, split view over and under water surface, Mediterranean sea

Seagrass and natural sunlight underwater in the sea (Neptune grass Posidonia oceanica), Mediterranean, France

A natural-looking background is created by a close up Sea Grass Fabric.

A fish in the pacific ocean with a large sun beam shining through.

Underwater photo from a scuba dive in the Mediterranean Sea

Turtle grass (Thalassia testudinum) in the Natural Reserve of Petite Terre off the coasts of Guadeloupe (Caribbean, France)

Grassy seabed and water surface underwater in the sea (Posidonia oceanica seagrass), natural scene, Mediterranean sea

Freshwater spring

Green turtle with its remora looking for food on sea grass in the lagoon

White sea grass floor panels. Seaweed texture floorboards.

Seagrass meadow (Posidonia oceanica) an endemic species of the Mediterranean Sea

Sea grass underwater in the Mediterranean, neptune grass Posidonia oceanica, French Riviera, France

seagrass in blue ocean

Ghost nets among Posidonia oceanica

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