MICR 2420 Lecture Notes - Lecture 13: Syntrophy, Pompeii Worm, Prochlorococcus
15 Aug 2020
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21.4 Animal Digestive microbiomes
21.5 Marine and Fresh water Microbes
21.6 Soil and Plant Microbial communities
Holobionts= the host plus all its microbial symbionts. Composed of many different types of
organism including microbes
Syntrophy = One species lives off the products of another-feed together. The metabolic
interaction bet two different species, microbial partners
ALL ANIMALS HAVE AN ASSOCIATED MICROBIOTA
▪ Ruminants rely on microbes to digest cellulose
▪ Some insects too to digest their dietary substrates:
-Termites : wood- digesting microbiome
A large ciliate protist , associated with many bacterial endosymbionts and
exosymbionts that help M.paradoxa to feed, resides in the hindgut and
digest wood components.
Both symbionts & termite benefit from the association
Document Summary
Holobionts= the host plus all its microbial symbionts. Composed of many different types of organism including microbes. Syntrophy = one species lives off the products of another-feed together. The metabolic interaction bet two different species, microbial partners. All animals have an associated microbiota: ruminants rely on microbes to digest cellulose, some insects too to digest their dietary substrates: A large ciliate protist , associated with many bacterial endosymbionts and exosymbionts that help m. paradoxa to feed, resides in the hindgut and digest wood components. Both symbionts & termite benefit from the association. Demodex mites : don"t need anus as they have such an efficient gut. In the open ocean, water column known as pelagic zone and divided into distinct regions. Thermocline = depth at which temperature decreases steeply & water density increase. Holger jannasch : discovered unculturable marine bacteria, estimated 25000 different microbial species per l of seawater (70% were unknown, prochlorococcus = most abundant photosynthetic organism.
