Wikibooks: Horticulture/Nematodes

• Format: Book
• Language: English
• Subjects: Antarc*; Antarctica
• Online Access: https://en.wikibooks.org/wiki/Horticulture/Nematodes

phytopathbox Nemotodes Image = Roundworm.jpg Type = Genus = Binomial = Conditions = Transmission = Hosts = Cycle = Parasitism = he nematodes or roundworms (Phylum Nematoda from Greek νῆμα (nema) thread + ώδη ( ode) like ) are one of the most common phyla of animals with over 20 000 different described species (over 15 000 are parasitic). They are ubiquitous in freshwater marine and terrestrial environments where they often outnumber other animals in both individual and species counts and are found in locations as diverse as Antarctica and oceanic trenches. Further there are a great many parasitic forms including pathogens in most plants and animals humans included. Only the Arthropoda are more diverse. =Abundance= Nematodes have successfully adapted to nearly every ecological niche from marine to fresh water from the polar regions to the tropics as well as the highest to the lowest of elevations. Though 20 000 species have been classified it is estimated that this number may be upwards of 500 000 if all were known. cite book last= Hyman first= L.H. title=The invertebrates vol. III. Acanthocephala Aschelminthes and Entoprocta the pseudocoelomate Bilateria. publisher= Mc Graw Hill location= New York isbn=0070316619 . In certain fertile areas the topsoil is estimated to contain in the billions of nematodes per acre. cite book last= Hickman first= Cleveland coauthors= Roberts L. Keen S. Larson A. Eisenhour D title= Animal Diversity edition= 4th publisher= Mc Graw Hill location= New York language= English isbn= 978 0 07 252844 2 In the 1914 edition of the Yearbook of the United States Department of Agriculture N.A.Cobb wrote on the abundance of nematodes If all the matter in the universe except the nematodes were swept away our world would still be dimly recognizable and if as disembodied spirits we could then investigate it we should find its mountains hills vales rivers lakes and oceans represented by a thin film of nematodes. The location of towns would be decipherable since for every massing of human ...