populations in ecosystems

ecosystem

all the living and nonliving components of a particular area

habitat

the place where an organism normally lives and which is characterised by physical conditions and types of other organisms present

population

group of individuals of the same species that occupy the same habitat at the same time

distribution

describes how a species is spread throughout an ecosystem

ecological niche

describes how an organism fits into its environment. describes what a species is like, where it occurs, how is behaves, its interactions with other species, how it responds to the environment

community

all the living organisms present in an ecosystem at a given time

biotic factor

ecological factor that makes up part of the living environment of an organism

abiotic factor

an ecological factor that makes up part of the non-biological environment of an organism

examples of abiotic factors

temperature, ph, rainfall, humidity

examples of biotic factors

food availability, competition, predation

how can savannah grassland ecosystems be damaged

wildfires caused by drought, farming, grazing

how can marine reef ecosystems be damaged

pollution, turbulence (natural and unnatural), too warm waters, physical destruction, high acidity

how can lake/forest freshwater ecosystems be damaged

eutrophication, diseases, fishing, polllution