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Instructors: see notes section below this slide. Autotroph Gets carbon from atmosphere More plant-like (producer) Heterotroph Gets carbon from organic materials More animal-like (consumer) Bacteria on head of pin © 1999 The Centre for Microscopy and Microanalysis ! © ARS Photo by Tomaž Vavpotič Photo courtesy of NOAA Cyanobacteria NASA Plant-like: stationary, uses sunlight and CO2 for energy and food (photosynthesis), photoautotroph Bacterial flagella Dartmouth electron microscope facility Paramecium Wikipedia Amoeba Dr. Ralf Wagner Animal-like: Pseudopodia for movement and feeding Copyright Shannan Muskopf Animal-like: Moves and searches for own food Euglena Copyright 1995-2005 Protist Information Server Plant and Animal-like: Can use flagella to search for food or Can produce food through photosynthesis (mixotroph) • All single celled and do not have a nucleus • Bacteria can be both helpful and harmful • Bacteria engage in chemical warfare with each other: (Streptomycin) Source: NASA Stromatolites © Jake Brumby Stromatolites Cyanobacteria Dr. Ralf Wagner A bloom of cyanobacteria Baltic Sea east of Sweden on Aug 2, 1999. NASA CO2 Respiration Food nutrients Dead organic matter Waste Bioremediation for an oil spill CO2 Respiration Food nutrients Dead organic matter Waste (that give us grief) Lyme disease, a bacterial disease transmitted by ticks 25% of world population dies Cholera (Vibrio cholerae) Haemophilus influenzae (Pneumonia) Anthrax Notes from 11/28 Microorganisms Anything too small to see without magnification 3 types of microorganisms Bacteria, protists, fungi 2 major ways to get food Autotroph, Heterotroph Autotroph Gets food (carbon) from the atmosphere (CO2), more plant-like, known as producer. Heterotroph Gets food by ingesting other things, more animal like, known as consumer. Microorganism size range from very small to large (fly’s head) Microorganism habitat From bottom of sea to Salt Lake and everything in-between Movement Some are stationary, others move by cilia (small hairs), flagella (longer tail) or pseudopodia (extensions of outer membrane) Notes from 11/28 Bacteria Single celled, no nucleus Good bacteria Cyanobacteria produced our oxygen, other bacteria break down waste, leaves and oil Bad bacteria Tuberculosis, cholera, the plague, anthrax Protists Single or multi-celled with nucleus, often live in ponds Good protists Dinoflagellates and diatoms are the base of food chain Bad protists ….. • Both single-celled and multi-celled organisms, most have a nucleus • Some protists produce their own food through photosynthesis, others consume their food • A great place to find many protists is in a local pond • Some protists are helpful to other living things, while other protists are disease causing. A dinoflagellate Dr. Ralf Wagner. Bioluminescent dinoflagellates Diatoms (that are pesky) Red tide (Dinoflagellates) P. Alejandro Díaz Human blood cell infected with Plasmodium Giardia lamblia, a diplomonad • Neither plant nor animal, have characteristics of both • Consume food by absorbing nutrients from whatever they are growing on Penicillium mold Hyphae Spores Fungal production of an antibiotic Budding yeast CO2 Respiration Food nutrients Dead organic matter Waste CO2 Respiration Food nutrients Dead organic matter Waste ARS (fungi without the fun) The common mold Rhizopus decomposing oranges ARS Athletes foot ARS Microorganism treasure hunt: What questions do you have about microorganisms living around school? 1. 2. 3. ARS ARS
