November 17, 2003 - Ecology

November 17, 2003 - Ecology - I II Ecology a Eco from oikos...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
I. Ecology a. “Eco” from “oikos”; and “logos” b. study of house or dwelling i. the study of the interactions of an organism and its environment. Environment can mean several different traits of the habitat. Includes water, plants, etc. Also other animals, predators or parasites. All are important to an organisms survival c. We will talk about ecological principles d. Extremely large e. Three Areas i. Populations 1. a group of individuals of the same species that lives in a specific area ii. Communities 1. all the populations that live in a given area and interact with one another iii. Eco-Systems 1. Ecological community along with its environment iv. The Eco-sphere 1. the entire earth II. Populations a. The number of individuals within a population i. These must be managed on an annual basis. ii. We need to know the number of animals in an area in order to be managed iii. Both the Whooping Crane and the Condor have gone under intensive management in order to help prevent extinction. iv. The number isn’t exactly what is important, more the density of the population v. Also you need to sometime take a bio mass 1. the mass of all organic material in an area vi. Total counts 1. if the animals are large and conspicuous 2. like elephants or giraffes b. Quadrant Assessing i. Limited number of “counters” ii. So the counting is taken care of in small quadrants instead of the entire area. iii. You can use a Rendom Number Generator and measure a percentage of the area. 1. of course, the sample needs to be random 2. trees are extremely easy in that they are fixed and do not run away. Lol. 3. For example, the fence lizard c. Mark and Recapture i. For the animals that are not staying in one area.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ii. You would set a number of traps to capture individuals of the species, the individuals would be marked with something, say paint. Maybe a more inconspicuous device for marking. iii. Then you release the animals and set the traps again. And then consider the individuals that are recaptured III. Stratified a. Focus the sampling efforts in the areas in which the individuals are most likely to be present or abundant. IV.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/12/2011 for the course BIOLOGY 100 taught by Professor Smith during the Spring '11 term at South Carolina Upstate.

Page1 / 5

November 17, 2003 - Ecology - I II Ecology a Eco from oikos...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online