Instructors: see notes section below

this slide.

More plant-like

(producer)

More animal-like(consumer)

Gets carbon from atmosphere Gets carbon from organic materials

Autotroph Heterotroph

Bacteria on head of pin © 1999 The Centre for Microscopy and Microanalysis

!

© ARS

Photo by Tomaž Vavpotič

Photo courtesy of NOAA

Plant-like: stationary, uses sunlight and CO2 for energy and food (photosynthesis), photoautotroph

Cyanobacteria

NASA

Bacterial flagella

Dartmouth electron microscope facility

Paramecium

Wikipedia

Amoeba

Animal-like: Pseudopodia for movement and feeding

Dr. Ralf Wagner

Animal-like:Moves and searches for own food

Copyright Shannan Muskopf

Euglena

Plant and Animal-like:Can use flagella to search for food

or Can produce food through photosynthesis

(mixotroph)

Copyright 1995-2005 Protist Information Server

• 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

Waste

Food nutrients

Biodegradation

Dead organic matter

Respiration

Bioremediation for an oil spill

CO2

Waste

Food nutrients

Biodegradation

Dead organic matter

Respiration

(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

Waste

Food nutrients

Biodegradation

Dead organic matter

Respiration

ARS

CO2

Waste

Food nutrients

Biodegradation

Dead organic matter

Respiration

(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