Study Guides (238,073)
Canada (114,907)
Biology (1,397)
All (3)

Ecology Lecture No. 1.docx

4 Pages
Unlock Document

Western University
Biology 2483A

Ecology Lecture No 1 Introduction To EcologythTuesday September 11 2012EcologyThe scientific study of interactions between organisms and their environment the scientific study of interactions that determine the distribution geographic location and abundance of organismsGeneral Misconceptions In EcologyThe notion that there is a balance of nature and return to an original preferred state after disturbance is a common misconception as many random factors contribute to complete changes in ecosystems that are not necessarily reversibleThe notion that each species has a role to play in maintaining the balance of a given ecosystem is a common misconception as ecological communities exhibit a lot of redundancy in the sense that many different species carry extremely similar ecological roles and the environment will continue regardless of the fact that a particular species has gone extinct There are however a handful of keystone species that the ecosystem relies upon to stay abundantEcological MaximsI Organisms interact and are interconnectedthough the connectedness may sometimes be vague it is nevertheless presentII Everything goes somewheredespite the negative consequences faced by an ecosystem life continues and organisms are immediately influencedIII No population can increase in size foreveras in human populations and bacteria in a beaker there are certain limits that imposed upon population growth in every ecosystemIV Finite energy and resources result in tradeoffsorganisms always develop vulnerabilities to their ecosystem despite their numerous strengthsV Organisms evolvethe abiotic and biotic factors of a given ecosystem will allow organisms selected against the opportunity to evolveVI Communities and ecosystems change over timeecological spaces housing numerous organisms are never static they are the products of changeVII Spatial scale mattersThere are important distinctions surrounding an organism a population a community an ecosystem and the biosphereThe Ecological HierarchyOrganismany contiguous biological system part of a population PopulationGroup of individuals of a species that are living and interacting in a particular area
More Less

Related notes for Biology 2483A

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.