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Lecture 1

BIOL150 Lecture Notes - Lecture 1: Dew Point, Vapor Pressure, Northern Hemisphere

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Rebecca Rooney

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Introduction to Ecology
Ecology science that studies organisms interacting with their environment
Environmentalism activism focused on protecting the natural environment, particularly from
the impacts of human activities
Environment osists of all the exteral fators that ifluee a orgais’s surial, groth
and or reproduction
Ecosystem the biotic community and its abiotic environment
All environmental factors fall into these categories:
Resources consumed by an organism
Conditions only influence an organism but not consumed
Hazards includes factors that can only affect an organism negatively if they are present
Organisms can compete for resources but not conditions. Conditions can indirectly affect
competition by altering availability of a resource
Ecological Hierarchy:
Population group of individuals of the same species occupying a given area at a given time
Community all populations of all species living and interacting within an eco-system
Levels above the community include abiotic components
Landscape area of land composed of a patchwork of ecosystem
Biome broad-scale regions in which the landscape is dominated by similar ecosystems
Biosphere the arro iterfae at Earth’s surfae that otais ad supports life
- Atmosphere layers of air surrounding the earth (Co2, O2, N2)
- Hydrosphere ater at or ear Earth’s surfae, iludig the soil solutio (H20,
dissolved nutrients, light, habitat space)
- Lithosphere solid earth and soil (minerals, nutrients)
Scale the level of resolution in time and or space over which a pattern or process is
Autecology both structural and physiological ecology
Behavioural Ecology explore factors affecting species distribution
Population Ecology focuses to population size and how it changes over time
Evolutionary Ecology- the study of changes in population genetics in response to evolutionary
processes, particularly natural selection
Community Ecology studies community patterns and the processes that contribute to them
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