Chapter 2.1: Ecology

Organization of Life Individual Population Community Ecosystem Biome Biosphere

Vocabulary Review Ecology 2. Population 3. Ecosystem 4. Symbiosis 5. Commensalism 6. Mutualism 7. Parasitism a. Study of interactions between organisms & environment b. Group of org.(same species), that interbreed & live in same area c. Permanent, close association between 2+ organisms of different species d. populations & abiotic factors in a biological community e. 1 species benefits & the other neither harmed nor benefits f. Relation. both species benefit g. 1 species benefits, 1 harmed

Symbiosis = close & permanent association between organisms of a different species 1. Commensalism 2. Mutualism 3. Parasitism 4. Predator - Prey

Example of Commensalism

Example of Mutualism

Example of Parasitism

Example of Predator - Prey

Vocabulary Review Autotroph 2. Heterotroph 3. Decomposer 4. Food chain 5. Trophic level 6. Food web 7. Herbivore a. Organisms that make their own food b. Organisms must feed on organisms c. Organisms absorb nutrients from dead organisms d. Model shows how energy moves in an ecosystem e. Feeding step in the food chain f. Model shows all the possible feeding relationships at each trophic level g. Heterotroph that only feeds on plants

Food Chain  Autotrophs, also known as producers, make up the first level in all food chains which include plants and some aquatic photosynthetic plants. Exs. Grass and Green algae  1 st -order-heterotrophs, also known as primary consumers, make up the second level in a food chain and obtain food from photosynthetic organisms. Ex. Turtle

Example of a Simple Food Chain

Example of a Food Web

October 28, 2009 AGENDA: 1 – PowerPoint Presentation 2 – Review Key Topics 3 – Activity p.37 (1 – 5) HOMEWORK 1. Review Packet 2. Study for Exam