Environmental science - life processes
What do you call succession that starts on rock?
Lithosere
What do you call succession that starts in water?
hydrosere
What do you call succession that starts on sand?
Psammosere
What is the definition of a species?
Reproductively isolated group that naturally breed to produce fertile offspring
What are some biotic factors that effect species distribution?
food supply, pollination, seed dispersal, disease
What is a k selected species and whats an example?
A species with low fecundity, reaches sexual maturity at a later age, thus overall has fewer offspring. e.g. elephant
what is a biotic factor and an abiotic factor?
biotic - living facitr
abiotic - non living factor
What is a density independent factor?
A factor where the chance of an indivuduals survival does not depend on the density of its population.
What is some examples of a density independant factor?
Drought, flood, hurricane
What is an ecological niche?
The specific role a species plays in its habitat
How and why does biomass change as succession progresses?
Low to high - More organisms living and taking root in an environment
Why does a secondary succession take place faster than a primary succession?
Because there is already existing seeds in the soil (which does not already need to develop)
What is a secondary succession and some examples of why it happens?
The second time a succession occurs on an area; occurs after a disturbance for example a fire, flood, or human interference.
How does pollination method change as succession progresses
From wind to insect pollination
What is taxonomy?
The science of grouping organisms according to
the similarities in species.
What is an r selected species with an example?
A species with high fecundity, reaches sexual maturity at a young age and has many offspring. E.G rats
How does the importance of inter-species relationships change as successjon progresses?
Low to high
What is the definition of a population?
Number of all individuals of a species in an area.
How might a low-land heath phagioclimax be maintained?
Burning, grazing
What is the definition of an ecosystem?
Community of species, their relationships with eachother and the environment around them.
What is a density dependent factor?
Factor where the chance of survival for an individual depends on the density of its population.
Final community of species in a succession is known as..
the climax community
What are some abiotic factors that affect species distribution?
Light, temperature, pH, precipitation
How can a garden lawn phagioclimax be maintained?
Mowing
What is the definition of a biome?
A large geographical region with specific climatic conditions within which a characteristic community of species lives.
What is a phagioclimax?
The climax stage of a succession that has been influenced by humans.
What is a way to artifically raise the population of a species if the species becomes endangered?
Captive breeding
The first organisms to colonise an area are the
pioneer community
What is the definition of a habitat?
An area or location where a species lives
What is a community?
All members of all different species living in an area
If a population gets too high, how can it be artificially reduced
culling
What are some examples of density dependant factors?
Food supply, disease, competition for food
What is a range of tolerance?
A specific abiotic factor within which an organism lives within a specific range
What is a carrying capacity?
The greatest population that an area can support indefinitely without damaging/over-exploiting the environment