Presentation on theme: "Parts of an Ecosystem 1. Habitat- The place where an organism lives and that provides the things it needs. 2. Biotic factors- The living parts of an ecosystem."— Presentation transcript:
1 Parts of an Ecosystem1. Habitat- The place where an organism lives and that provides the things it needs.2. Biotic factors- The living parts of an ecosystem.Some examples of biotic factors are:- Grass - Animals- Trees - Bacteria3. Abiotic factors- The nonliving parts of an ecosystem.Some examples of abiotic factors are:- Water - Oxygen- Sunlight - Rocks
2 Many prairie dogs in the same area represent a population 4. Organism- the smallest unit of organization, represents one of a particular speciesA prairie dog is an organismof a particular species5. Species- A group of organisms that are similar and reproduce to produce fertile offspring.6. Population- All the members of one species in a particular areaMany prairie dogs in thesame area represent a population
3 abiotic factors form the ecosystem 7. Community- All the different populations that live together in an area.All the populations in an area that interact with one anotherThe community andabiotic factors form the ecosystem8. Ecosystem- All the living and nonliving things that interact in an area.9. Ecology- The study of how living things interact with each other and their environment.
4 Section 1-2 vocabularyPopulation density – The number of individuals in a specific area. Some methods of determining density are direct and indirect observation, sampling, and mark and recapture.Direct observation – This method counts, one-by-one, all of its members.Indirect observation – This method counts the signs of the members of a population like tracks, nests…Sampling – This method estimates the number of members in a population. One way of doing this is to count the number of organisms in a small area and then multiplying to find the number in a larger area.Mark-and-recapture – This method captures, marks, and releases the members. Later another group of animals is captured. The number of marked animals in the second group helps in estimating the population size.Estimate – an approximation of a number based on reasonable assumptionsBirth rate – the number of births in a population in a certain amount of timeDeath rate – the number of deaths in a population in certain amount of timeImmigration – moving into a populationEmigration – leaving a population
5 Carrying capacity – the largest population that an area can support Limiting factor – an environmental factor that prevents a population from increasingCarrying capacity – the largest population that an area can supportCheat Mountain SalamanderRed Spruce disappearing
6 Section 1-3 vocabulary22. Natural Selection- Process by which individuals that are better adapted to the environment are more likely to survive and reproduce than others.23. Adaptations- The behaviors and physical characteristics of species that allow them to live successfully in their environments.24. Niche- An organism’s particular role in an ecosystem, or how it makes its living.25. Competition- The struggle between organisms for the limited resources in a habitat.26. Predation- An interaction in which one organism kills and eats another.27. Predator- The organism that does the killing in predation.28. Prey- An organism that is killed in predation.
7 29. Symbiosis- A close relationship between species that benefits at least one of the species. There are 3 types of symbiotic relationships: mutualism, commensalism, and parasitism.30. Mutualism- A relationship between two species in which both species benefit.31. Commensalism- A relationship between two species in which one species benefits and the other is neither helped nor harmed.32. Parasitism- A relationship in which one organism lives on or inside another and harms it.33. Host- The organism that a parasite lives in or on in parasitism.