Knowra Deep-sea biodiversity Deep-sea biodiversity Deep-sea biodiversity is the variety of species and ecological communities inhabiting ocean environments beyond the reach of sunlight, shaped by darkness, pressure, cold, and scarce food.
Marine snow : Marine snow is sinking organic material, including dead plankton, fecal pellets, and detritus, that carries carbon from surface waters into the deep ocean. This falling material supplies much of the energy supporting communities far below productive surface waters.
Deep-sea mining : Deep-sea mining is the extraction of minerals from the ocean floor, including polymetallic nodules, sulfides, and crusts. Mining can remove habitat and generate sediment plumes where species distributions remain poorly known.
Biological carbon pump : The biological carbon pump is the set of biological processes that move carbon from surface waters into the deep ocean and seafloor. Deep-sea organisms help store carbon by consuming, transforming, and burying sinking material.
Deep-sea exploration : Deep-sea exploration is the scientific investigation of ocean regions beyond the reach of ordinary surface observation and sampling. New surveys continue to find species and habitats missing from existing biodiversity inventories.
Hydrothermal vent : A hydrothermal vent is a seafloor opening that releases hot, mineral-rich fluids, often supporting ecosystems powered by chemosynthesis. Vent communities show how deep-sea life can thrive without sunlight-derived food.
Marine protected area : A marine protected area is a geographically defined ocean space managed to conserve nature and associated cultural or ecosystem values. Protected areas can limit damaging activities across habitats supporting deep-sea biodiversity.
Fisheries-induced evolution : Fisheries-induced evolution is heritable change in exploited populations caused by selective fishing pressure. Deepwater fisheries can alter population traits as well as reduce species abundance.
Species discovery : Species discovery is the identification and formal description of organisms not previously recognized as distinct species. Many deep-sea organisms remain undescribed, making total diversity difficult to estimate.
Cold seep : A cold seep is a seafloor site where methane, sulfide, or other fluids escape slowly into surrounding water. Seep habitats sustain dense communities through chemical energy rather than ordinary food rain.
Environmental DNA : Environmental DNA is genetic material organisms leave in their surroundings, which can be sampled to detect species without collecting them. Water and sediment samples can reveal deep-sea species that visual surveys miss.
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