PPT-All about Earthworms

By Mrs Gillespie Earthworms burrow through the soil making tunnels They do this by eating the soil Worms help to keep soil healthy We need healthy soil for growing plants fruit and vegetables. brPage 1br brPage 2br brPage 3br brPage 4br brPage 5br of first brPage 6br brPage 7br brPage 8br brPage 9br brPage 10 and the role of earthworms. Some of these are placed after the more interesting chapters and this makes them a little boring to read. But they demonstrate an important-fact that Darwin was not only a Worms species come in three general categories. Litter . dwelling (. Epigeic. ). Soil dwelling (Endogenic). D. eep burrowing (. Anecic. ). Identifying Adult Worms. Adult worms have a thickened segment in their mid section that houses their . Vocabulary. Coelomic. - body cavity . Body cavity- any . fluid-filled space in a multicellular organism other than those of . vessels. Lateroneural. - Nerves that run the length of the body. Subneural. TheroleofearthwormsforassessmentofsustainabilityandasbioindicatorsMaurizioG.PaolettiUniversityofPadova,35100-Padova,Italy Earthworms,whichinhabitsoilsandlitterlayersinmostlandscapes,canofferanimportan HOSTthrivewetareasarepeststrees,freshvegetables,plantstems,trunks,leaves,flowers,rootsornamentalslandscapeplants,earthworms, CYCLEBEHAVIOR:EggReproducing Phylum . Annelida. (segmented worms). https://. www.youtube.com/watch?v=9Q9gh1k99rY. Main . Characteristics. . segment. ed worms. . true coelom (body cavity). Annelids. Include:  . . earthworms. Natalie Rideout, Aaryn Tays, Kaitlyn VanKoppen. Introduction. Worm’s habitat is a burrow in moist, compacted soil. Worms that come to the surface after a rainfall are vulnerable to predation. Debate over the reason why earthworms come to the surface. V. ermicompost. Importance of Composting. Proper disposal of organic wastes. . Done on a large agricultural scale or in backyard gardens.. Allows for recycling of nutrients and can increase soil fertility.. We will record the different kinds and number of earthworms.. We will learn how important earthworms are for healthy soils.. A . Citizen Science . project to record earthworms and soils.. What is an earthworm?. Biology . Biology is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.. Biology of Earthworm. Morphology of Earthworm. Phylum- . Annelida. Class- . Oligochaeta. Order- . Opisthopora. Genus- . Eisenia. . Species- . f. oetida. Species of earthworms: . There are about 3000 species of earthworms in the world but only 3-4 species are used in vermicomposting. In India, only two species are being extensively used for vermicomposting namely,. The common earthworm (. Lumbricus. . terrestris. ) is a terrestrial annelid of the class . Oligochaeta. (Baker & Garland, 1982). Earthworms have no specialized respiratory structures and gas exchange occurs by simple diffusion through a liquid film on the surface of the body, which must be kept moist (Curtis & Barnes, 1989). The earthworm has a closed circulatory system, of which the dorsal blood vessel is the principal pumping organ (Hickman et al., 2008). The blood is transported in this vessel by peristaltic waves of contraction and carries food, wastes and respiratory gases (Hickman et al., 2008). A closed circulatory system has an advantage over open systems as it can support a faster metabolic rate (. From . Hobbie. et al. 2006:. . . Whether . earthworms in this site are responding directly to higher litter . Ca. or to the concomitant higher concentrations of soil . Ca. (Reich et al. 2005) is unknown (.