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vocab 3 4 5 6

biosphere part of earth in which life exists including land, water, and air or atmosphere
biome a group of ecosystems that share similar climates and typical organisms
autotroph organism that is able to capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds (primary producer)
detritivore organism that feeds on plant and animal remains and other dead matter
primary producer first producer of energy-rich compounds that are later used by other organisms
carnivore organism that obtains energy by eating animals
heterotroph organism that obtains food by consuming other living things (consumer)
chemosynthesis process in which chemical energy is used to produce carbohydrates
decomposer organism that breaks down and obtains energy from dead organic matter
biomass total amount of living tissue
phytoplankton photosynthetic algae found near the surface of the ocean
ecological pyramid illustration of the relative amounts of energy or matter contained within each trophic level in a given food chain or food web
trophic level each step in a food chain or food web
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
biogeochemical 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
nitrogen fixation process of converting nitrogen gas into nitrogen compounds that plants can absorb and use
denitrification process by which bacteria converts nitrates into nitrogen gas
limiting nutrient single essential nutrient that limits productivity in an ecosystem
microclimate environmental conditions within a small area that differs significantly from the climate of the surrounding area
greenhouse effect process in which certain gases trap sunlight energy in Earth's atmosphere as heat
habitat area where an organism lives, including the biotic and abiotic factors
niche full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions
resource any necessity of life, such as water, nutrients, light, food, or space
competitive exclusion pinciple principle that states no two species can occupy the same niche in the same habitat at the same time
predation interaction in which one organism captures and feeds on another organism
herbivory interaction in which one animal feeds on the producer
keystone species single species that isnt usually abundant in a community yet exerts strong control on the structure of a community
symbiosis relationship in which two species live close together
mutualism symbiotic relationship in which both species benefit from the relationship
parasitism symbiotic relationship in which one organism lives on or in another organism and harms it
commensalism symbiotic relationship in which one organism benefits and the other isnt helped or harmed
ecological succession series of gradual changes that occur in a community following a disturbance
primary succession succession that occurs in an area in which no trace of a previous community is present
pioneer species first species to populate an area during succession
secondary succession type of succession that occurs in an area that was only partially destroyed by disturbances
logistic growth growh pattern in which a populations growth slows down and then stops following a period of exponentional growth
exponential growth growth pattern in which the individuals in a population reproduce at a constant rate
density dependent limiting factor limiting factor that depends on population density
density independent limiting factor limiting factor that affects all populations in similar ways, regardless of the population density
demography scientific study of human populations
Created by: Sharion Davis



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