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An aquatic ecosystem is an ecosystem found in and around a body of water, in contrast to land-based terrestrial ecosystems. Aquatic ecosystems contain communities of organisms — aquatic life —that are dependent on each other and on their environment.
In aquatic plants diffuse boundary layers (DBLs) around submerged leaves and photosynthetic stems vary based on the leaves' thickness, shape and density and are the main factor responsible for the greatly reduced rate of gaseous transport across the leaf/water boundary and therefore greatly inhibit transport of carbon dioxide. [16]
Aquatic plants are used to give the freshwater aquarium a natural appearance, oxygenate the water, absorb ammonia, and provide habitat for fish, especially fry (babies) and for invertebrates. Some aquarium fish and invertebrates also eat live plants. Hobbyists use aquatic plants for aquascaping, of several aesthetic styles. Most of these plant ...
The water in wetlands is either freshwater, brackish or saltwater. [18] The main types of wetland are defined based on the dominant plants and the source of the water. For example, marshes are wetlands dominated by emergent herbaceous vegetation such as reeds, cattails and sedges.
Ceratophyllum demersum is a cosmopolitan species of aquatic plant. Drosera, the sundews, are carnivorous plants with species found on every continent except Antarctica. Duckweeds are tiny flowering plants that float on the surface of water, with members of the group found worldwide. Isoetes is a cosmopolitan genus of lycophyte known as the ...
Nelumbo nucifera, an aquatic plant. Algae, including both phytoplankton and periphyton, are the principle photosynthesizers in ponds and lakes. [8] Phytoplankton are found drifting in the water column of the pelagic zone. Many species have a higher density than water, which should cause them to sink inadvertently down into the benthos.
Aquatic animals (8 C, 15 P) B. Brackish water organisms (1 C, 10 P) F. Fictional aquatic creatures (5 C) ... Aquatic plants (5 C, 212 P) S. Semiaquatic organisms (1 C ...
Aquatic animals generally conduct gas exchange in water by extracting dissolved oxygen via specialised respiratory organs called gills, through the skin or across enteral mucosae, although some are evolved from terrestrial ancestors that re-adapted to aquatic environments (e.g. marine reptiles and marine mammals), in which case they actually ...