Ecological Relationships and Energy Flow Flashcards
Define a Habitat
The Place where an organism lives and breeds
Explain Population
The Number of organisms of a single species in a habitat
Explain Community
All the population from all species in a particular area
Explain Biodiversity
A measure of the range of different
Explain environment
The surroundings i which an organism lives
Explain Ecosystem
an area in which a community interacts with each other and their physical surroundings
Explain sampling
a process used to give a good estimate of the number or percentage of an organism in a particular area
How should you take a sample
Representative: you should take as many measurements as possible
Reliable: there should be lots of repeats and average for the area should be calculated
Random: you should use random coordinates to avoid bias
what is random sampling
This is carried out when the area is uniform. Involves picking random coordinates and then putting quadrats down at these coordinates.
What is Belt Transect
Belt Transect (Systematic sampling) is carried out when there is gradation in the area e.g. on a beach. Involves putting down a belt transect and then placing quadrats beside it at intervals.
What is percentage cover
It is the percentage cover of each type of plant in a quadrat in counted.
What are biotic factors
These are the living factors that act on an organism e.g. the effect of a predator on its prey or where two species compete for the same food (competition)
wat are some Biotic factors
predator, prey and competition
What are abiotic factors
These are the non-living factors that act on an organism eg temperature, humidity, light intensity, wind
How can wind be measured
anemometer
