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ecology definitions

TermDefinition
Biotic Living things, such as plants, animals, fungi, and bacteria
Abiotic Nonliving factor in ecosystem
Producer Organism that obtains its energy from abiotic sources
Primary Consumer Herbivores because they r first consumer above trophic level
Secondary Consumer Carnivores, eat herbivores
Tertiary Consumer Carnivores that eat secondary consumers
Herbivore organisms that eat only plants
Carnivore eat only animals
Omnivore eat plants and animals
Detritivore eat detritus or dead organic matter
Decomposer detritivores that break down organic matter into simpler compounds
Generalist consumers that have varying diets dont rely on single food source
Specialist consumer that primarily eats 1 specific organism or feeds on very small number of organisms
Autotrophic get energy from nonliving resources make own food
Heterotrophic get energy by eating other living or once living resources such as plants and animals
Keystone Species species that has an unusually large effect on its ecosystems
Natural Selections mechanism by which individuals that have inherited veneficial adaptations produce more offspring on average than do other individuals
Adaptation inherited trait that is selected for overtime because it allows organisms to better survive in their environment
Niche all physical, chemical, and biological factors that species need to survive, stay healthy and reproduce
Competition ecolofical relationship in which two organisms attempt to obtain the same resource
Predation process by which one organism hunts and kills another organism for food
Symbiosis ecological relationship between memers of at least 2 different species that libe in direct contact with one another
Parasite species that directly harms a host
Host organism fed on by parasite
Mutualism ecological relationsjip between two spevies in which each species gets a benefit from the interaction
Commensalism ecological relationship in which one species recieves a venefit but the oter species is not affected one way or another
Parasitism ecological relationship in which one organism benefits by harming another organism
Habitat combined biotic and aviotic factors found in the area where an organism lives
Competitive exculsion theory that states that no two spevies can occupy the same niche at the same time
ecological equivalent organisms that share a similar niche but live in different geographical regions
Population Density measure of individuals living in a defines area
Population Dispersion way in which individuals of a population are spread out over an area or volume
Survivorship Curve graph showing the surviving memvers of ech age group of a population over time
Immigration movement of individuals INTO a population
Emigration mocement of individuals OUT of a population
Exponential growth dramtic increase in population over a short period of time
Logistic Growth population growth that is characterized by a period of slow growth, followed by a period of exponential growht, followed by a period of almost no growth
Carrying Capacity number of individuals that the resources of an environment can normally and persistently support
Population crash dramatic decline in the size of a population over a short period of time
Limiting factor environmental factor that limits the growth and size of a population
density-dependent limiting factor environmental resistnace that affects a population that has become overly crowded
density-independent limiting factor environmental resistance that affects a population regardless of population density
succession sequence of biotic changes that regenerate a damged community or start a community in a previously uninhavited are
primary succesion establishment and development of an ecosysten in an area that was previously uninhavited
pioneer species first to live in new ecosystem
secondary succession reestablishment of a damged ecosystem in an area where the soil was left intact
who is the awesomest person ever? Jordan McElroy
Created by: jojo775 on 2013-03-12



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