Life On Earth Flashcards
Biodiversity
The Number and variety of different living species of organisms in one area
Producer
Living organisms that make their own food(green plants)
Consumer
Any organism that eats something else
Ecosystem
All the living and non living organisms partially to do with the habitat and non living organisms with which they interact
Habitat
The place where an organism lives
Community
All of the living organisms in an ecosystem eg. All the plants and animals
Population
The total number of living organisms in one area. Only one species
Niche
The role that an organism plays within a community
Inter specific competition
Competition amongst individuals of different species eg. Red and grey squirrels
Intra specific competition
Competition amongst the same species. More intense than inter. Eg. Stag for mates
What do animals compete for
Food Light Water Mates Territory/space
Pyramids of numbers
Show number of organisms present at each level of food chain
Pyramids of energy
Show the flow of energy in a food chain. Amount of energy decreases as you go up the food chain
Energy loss in ecosystem
Food consumption
Used for growth
Heat and movement
Lost in waste, faeces, urine
Abiotic factors
Non living
- light intensity
- pH
- moisture
- humidity
Biotic factors
Living factors
- Disease
- grazing
- competition
Measuring abiotic factors
Light meter
Ph measure
Sampling techniques
Pitfall trap
Quadrat
Indicator species
A species that gives an indication that there is an effect within the area such as PH.
Bushy
Leafy
Crusty
Water pollution
Water containing large numbers of nymph and mayflies indicates high levels of oxygen in the water. Bloodworms= low levels of oxygen and high levels of pollution
Photosynthesis
Producers make there own food by photosynthesis. Plants take light energy from the sun
