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diatom    
n. 矽藻类

矽藻类

diatom
n 1: microscopic unicellular marine or freshwater colonial alga
having cell walls impregnated with silica


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  • Diatom - Wikipedia
    A diatom (Neo-Latin diatoma) [a] is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world Living diatoms make up a significant portion of Earth's biomass They generate about 20 to 50 percent of the oxygen produced on the planet each year, [11][12] take in over 6 7 billion tonnes of silicon each year from
  • Diatom | Description, Characteristics, Reproduction | Britannica
    diatom, (class Bacillariophyceae), any member of the algal class Bacillariophyceae (division Chromophyta), with about 16,000 species found in sediments or attached to solid substances in all the waters of Earth Diatoms are among the most important and prolific microscopic sea organisms and serve directly or indirectly as food for many animals Diatomaceous earth, a substance composed of
  • What are Diatoms? - Diatoms of North America
    Diatoms are single-celled algae Diatoms are algae that live in houses made of glass They are the only organism on the planet with cell walls composed of transparent, opaline silica, which forms intricate and striking patterns
  • Diatom Species: What They Are Why They Matter
    Explore diatoms, the silent, microscopic drivers essential to aquatic life and global cycles, whose importance extends far beyond what meets the eye
  • IDENTIFICATION GUIDE: fact sheet
    Significance: Some diatom species can produce aromatic odors when present in small numbers However, these same species often produce a fishy odor when they become more abundant Diatom blooms can be initiated by an increase in nitrates and phosphates Diatoms play an important role in the environment, serving as a primary food source for zooplankton (mainly crustaceans and fish larvae) and as
  • Diatom - an overview | ScienceDirect Topics
    Diatom frustules can be preserved for long periods after cell death Even when the system has dried out, their cell walls made of silica assure their preservation inside the lake sediments, making them an excellent and successful proxy indicator compared to other biological proxies (Dixit, 1992)
  • DiatomBase
    DiatomBase is an attempt to integrate the Catalogue of Diatom Names, and include names that have appeared since the Catalogue of Diatom Names was last updated (2011), as well as to include information about types, ecology, images, original descriptions and distributions
  • Diatom - New World Encyclopedia
    Diatom is the common name for a major group of unicellular or (less commonly) colonial algae comprising the protist taxon Bacillariophyceae (or Bacillariophyta), characterized by unique cell walls of silica (hydrated silicon dioxide) Called a frustule, these cell walls usually consist of two overlapping and interlocking asymmetrical sides with a split evident between them, hence the group
  • Diatoms – Definition, Structure, Life Cycle, Importance
    Definition of Diatom A diatom is a tiny, single-celled algae with a hard shell made of silica, found in oceans, waterways, and soil They play a crucial role in oxygen production, nutrient cycling, and the food web of aquatic ecosystems
  • Diatoms - Jewels of the Sea | MarineBio Conservation Society
    Diatoms are unicellular photosynthetic eukaryotes encased in intricate silica cell walls that occur as solitary cells or form colonies in diverse shapes such as ribbons, stars, and fans They contribute roughly 20–25% of global carbon fixation and produce nearly one-fifth of Earth’s oxygen, making them vital to planetary biogeochemical cycles





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