ecosystem and photosynthesis Flashcards
ecosystem
all organisms living in a particular area
habitat
place where an organism lives
population
all the organisms of one species in a habitat
population size
number of individuals of one species in a particular species
community
all the organisms of diff species that live in the same habitat and interact within each other
abiotic factors
non living features
biotic
living features
reasons for population size to vary because of abiotic factors
abiotic factors such as light, water, temp
why does abiotic factors have to be ideal for species
so organisms can grow fast and reprod successfully
reasons for biotics factors affecting population size
1) interspecific competition
2) intraspecific competition
3) predation
interspecific competition
when organisms of diff species compete with each other for the sme resources
limitation of interspecific competition
resources available to both organisms would be reduced, therefore less available, so less energy for food and reprod
intraspecific competition
organisms of the sme species compete with each other for the sme resources
limitation of intraspecific competition
popu of a species inc when resources are plentiful.
as popu inc, more organisms competing for the sme resources.
resources are limited and popu then begins to decline.
predation
where an organisms (predator) kills and eats an another organisms (prey)
limitations of predation
as prey popu inc theres more food for predator, so predators popu inc.
when predator popu inc, more prey is eaten, so prey popu dec
so less food for predators, predators popu dec aswell.
niche
role of a species within its habitat
2 types of succession
primary and secondary succession
primary succession
happens on land that is newly formed or exposed such as there’s no soil or organic material to start with just bare rocks
secondary succession
happens on land that has been cleared of plants but where soil still remains.
