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Ecology

TermDefinition
Ecology The study of interactions between living things and their environment
Biosphere The part of the planet containing living organisms
Ecosystem A group of clearly distinguished organisms that interact with their environment
Habitat The place where a plant or animal lives
Population All the members of the same species living in an area
Community All the different populations in an area
Abiotic Factors Non-living factors eg. Aspect, Altitude, Steepness
Biotic Factors Living factors eg. predation, parasitism, competition
Climatic Factors Refer to weather over a period of time eg, wind, light intensity, temperature
Edaphic Factors Refer to soil eg. soil pH, soil type, soil content
Producers Organisms that make their own food using photosynthesis
Consumers Organisms that get their food from other organisms
Grazing Food Chain A sequence of organisms in which each organism is eaten by the one after it eg. grass<greenfly<ladybird<thrush
Trophic Level A feeding stage in a food chain
Food Web Two or more interlinked food chains
Pyramid of Numbers The number of organisms at each trophic level
Niche The role of an organism in its community
Nutrient Recycling The way in which elements such as carbon or nitrogen are exchanged between living and non living components of an ecosystem
Nitrogen Fixation The conversion of atmospheric nitrogen to ammonia, ammonium and nitrates
Nitrification The conversion of ammonia and amonnium to nitrites and then to nitrates
Denitrification The conversion of nitrates back to atmospheric nitrogen
Pollution Any harmful addition to the environment
Pollutant A substance that causes pollution
Conservation The wise management of natural resources
Eutrophication The adding of nutrients to fresh water
Competition When organisms fight for something in short supply
Intra-specific Competition Between members of the same species
Inter-specific Competition Between members of different species
Contest Competition Two organisms fight for something in short supply and one wins
Scramble Competition Two or more organisms fight for something in short supply and each get something
Predation The catching, killing and eating of an organism
Predator An organism that catches, kills and eats its prey
Prey The organism that is eaten by the predator
Parasitism When two organisms of different species live in close association where one gets its food from the other to the others disadvantage
Parasite Gets its food from and to the disadvantage of another organism, the host
Host The organism the parasite feeds on
Symbiosis Two organisms of different species living in close association where one gets its food from the other and at least one benefits
Mutualism Two organisms of different species living in close association where one gets its food from the other and both benefit
Factors that Affect Population War, Famine, Disease
Capture-recapture Method No.caught 1st day x No.caught 2nd day _________________________________ No. marked 2nd day
Created by: klonican33