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Chapter 3 Ecologyy

Chapter 3 Ecology

QuestionAnswer
Ecology The scientific study of interactions among organisms and between organisms and their environment or surroundings
levels of organization organism-> population->community-> ecosystem-> BIOME-> biosphere
Biome A group of ecosystems that have the same climate and dominant communities.
species A group of organisms so similar to one another that they can breed and produce fertile offspring.
autotroph/producer Use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules
Photosynthesis When autotrophs use light energy from the sun to power chemical reactions that convert carbon dioxide and water into oxygen.
chemosynthesis When organisms use chemical energy to produce carbohydrates.
Heterotroph organisms that rely on other organisms for their enemy and food supply.
Herbivore eat plants
Carnivore eat animals
Omnivore eat plants and animals
Detritivore eat plant and animal remains and other dead matter
Decomposer break down organic matter
Food chain A series of steps in which organisms transfer
Food Web When the feeding relationships among the various organisms and ecosystems form a network of complex interactions
Cellular respiration The process of cell catabolism in which cells turn food into usable energy in the form of ATP.
Trophic level Each step in a food chain or food web
Ecological Pyramid
Biogeochemical cycle pass the same molecules around again and again within the biosphere.
Limiting nutrient When an ecosystem is limited by a single nutrient that is scarce or cycles very slowly.
Algal bloom When an aquatic ecosystem receives a large input of a limiting nutrient
Created by: RHansy
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