succession

There might not be room for people to move around.

There might not be enough food and water for everyone.

The continents might sink into the oceans.

Most of the people on the planet would starve.

exponential growth

logistic growth

predator-prey cycle

boom-bust curve

2.0 million

1.0 million

1.6 million

0.5 million

volcanic eruption

earthquake

disease

hurricane

migration.

factors.

succession.

            erosion.

breakdown of rock by pioneer species.

migration of animals.

growth of trees and shrubs.

appearance of soil.

non-native species.

pioneer species.

primary species.

secondary species.

after a forest fire.

with pioneer species.

if a glacier shrinks.

on a new volcanic island.

It begins with a climax community.

Small mammals are first to inhabit the area.

It only occurs after glaciers retreat.

            It begins with bare rock.

Start with bare rock/no soil

Start with soil

started by remaining species

started by pioneer species

From previously uninhabited area

Secondary Succession

Aquatic succession

Primary Succession

Ferns must grow

volcano destroying habitat leaving only soil and ash

Tornado destroying a crop leaving very little soil

Glacier retreating exposing bare rock

limiting factors