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Biosphere Part of Earth in which life exists including land, water , and air or atmosphere
Species A group of similar organisms that can breed and produce fertile offspring
Population Group of individuals of the same species that live in the same area
Community Assemblage of different populations that live together in a defined area
Ecology Scientific study of interactions among organisms and between organisms and their environment.
Ecosystem All the organisms that live in a place, together with their non-living environment
Biome A group of. Ecosystems that share similar climates and typical organisms
Biotic factor Any living part of the environment with which an organism might interact
Abiotic factor Physical, or non-living factor that shapes an ecosystem.
Autotroph Organism that is able to capture energy from sunlight or chemicals and use it to produce its own food; also called a producer
Primary producer First producer of energy-rich compounds that are later used by other organisms
Photosynthesis Process used by plants and other autotrophs to capture light energy and use it to power chemical reactions that convert carbon and water into energy rich carbohydrates such as sugars and starches
Chemosynthesis Process in which chemical energy is used to produce carbohydrates
Heterotroph Organism that obtains food by consuming other living things;also called a consumer.
Consumer Organism that relies on other organisms for its energy and food supply;also called a Heterotroph
Carnivore Organism that obtains energy by eating animals
Herbivore Organism that obtains energy by eating only plants
Scavenger Animal that consumes the carcasses of other animals
Omnivore Organisms that obtains energy by eating both plants and animals
Decomposer Organism down obtains energy from dead organic matter
Detritivore Organism that feeds on plant remains and other dead matter
Food chain Series of steps in an ecosystem in which organisms energy by eating and being eaten.
Phytoplankton Photosynthetic algae found near the surface on the ocean
Food web Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
Zooplankton Small free-floating animals that form part of plankton
Tropic level Each step in a food chain
Ecological Pyramid Illustration of the relative amounts of energy or matter contained within each energy or matter contained within each trophic level in a given food chain or food web
Biomass Total amount of living tissue within a given trophic level
Bio geochemical cycle Process in which elements, chemical compounds ,and other forms of matter are passed from one organism to another and from one part of the biosphere to another
Nutrient Chemical substance that an organism needs to sustain life
Nitrogen fixation Process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
Denitrification Process by which bacteria convert nitrates into nitrogen gas
Limiting nutrient Single essential nutrient that limits productivity in an ecosystem
Created by: Shaufnm1