ECOLOGICAL SUCCESION

What does it mean that an ecosystem is stable?

• there is recycling of matter

• energy flows in the ecosystem

• animals interact in food chains and food webs

• all the answers are valid

what is a DISTURBANCE in an ecosystem?

• major change in ecosystems because fires , blizzards, droughts

• when animals go extinct in an ecosystem

• when there are species adapting to the environment (natural selection)

an ecosystem stays at equilibrium when there are disturbances, this is RESILIENCE

• TRUE

• FALSE

why biodiversity is very helpful when there are disturbances ?

• because all species go extinct

• populations and communities become more adapted to changes

• because more biodiversity is more different species that can be resistant

if we have a population of plants of the same species and a DROUGHT happens ? what is the final result?

• maybe some plants species survive

• all the plants species die

• some species will become resistant and survive

in primary succesion , there is a fire, the soil is intact and we can recuperate the ecosystem after many years

• TRUE

• FALSE

What type of succession is in the picture?

• PRIMARY SUCCESSION

• SECONDARY SUCCESSION