2.1 – Organisms and Their Relationships Ecology 2.1 – Organisms and Their Relationships

Early Work 9/16 List all the types of organisms you have observed in your school/home environment Make a diagram that shows how the organisms on your list interact with one another

Chapter 2 Principles of Ecology Chapter Diagnostic Questions The act of one organism consuming another organism for food is _______. predation parasitism commensalism mutualism D C B A CDQ 1

from an autotroph to a heterotroph from a heterotroph to an autotroph Chapter 2 Principles of Ecology Chapter Diagnostic Questions Identify how energy flows through an ecosystem in a typical food chain. from an autotroph to a heterotroph from a heterotroph to an autotroph from a carnivore to an herbivore from an omnivore to an herbivore D C B A CDQ 2

Chapter 2 Principles of Ecology Chapter Diagnostic Questions What is a chemical substance that an organism must obtain from its environment to survive? biomass energy matter nutrient D C B A CDQ 3

What is ecology? Interview with an ecologist Key Theme:

2-1 What is Ecology? Ecology… is the scientific study of the interactions of organisms with one another and their environment. Scientists study ecology through… Observing – create questions to study “What species live here? Experimenting – test hypotheses Set up an artificial environment in lab to manipulate conditions in the natural world Modeling - mathematical formulas based on data to make future predictions

The Biosphere The portion of earth that supports life Includes both Biotic (living) and Abiotic (non-living) factors

Levels of Organization

Levels of Organization

Guess the Level A group of seniors at Crosspoint Academy An eagle flying over campus The soccer field and athletes at practice Coniferous forest found in Washington and Great Britain Cliques in the lunchroom Voting Fingers Organism Population Community Ecosystem Biome

Ecosystem Interactions Habitat vs. Niche Where an organism lives How an organism lives

Community interactions Talk to your neighbor to brainstorm how organisms interact with one another… Competition….for food, water, shelter, space Predation…predator pursues the prey

Symbiosis The close relationship that exists when two or more species live together Match the following relationships with their definitions: Mutualism Parasitism Commensalism One organism benefits, the other isn’t helped or harmed. Both organisms benefit from one another One organism benefits while another is harmed

Which are biotic factors in a forest environment? Chapter 2 Principles of Ecology 2.1 Formative Questions Which are biotic factors in a forest environment? plants and microscopic organisms living pH and salt concentration of the soil sunlight, soil type and soil nutrients temperature, air currents and rainfall D C B A FQ 1

Chapter 2 Principles of Ecology 2.1 Formative Questions What is the name for a group of interacting populations that occupy the same area at the same time? ecosystem habitat biological community biotic collection A B C D FQ 2

all of the biotic factors in an ecosystem Chapter 2 Principles of Ecology 2.1 Formative Questions Which defines habitat? all of the biotic factors in an ecosystem an area where an organism lives an area in which various species interact the role or position that an organism has D C B A FQ 3