Bellringer What is the difference between density- dependent and density-independent limiting factors? Give an example of each. Please add questions and summary to your Population Ecology notes Summary: 3 things you learned 2 things that you found interesting 1 question

Learning Target Describe the impact of major ecological disturbances on communities and the process of ecological succession.

Communities

Community  All the populations that live together in a habitat Habitat is the type of place where individuals of a species typically live Type of habitat shapes a community’s structure

Limiting Factors  - factors that control a population's growth Food Predators Temperature

What factors would limit these communities?

Keystone Species A species that has a large effect on the ecosystem it lives in. If a keystone species is removed from an ecosystem will cause a ripple effect across the entire ecosystem, affecting all organisms living in it. Ex. Beavers- Construct dams, which changes free-flowing stream habitats into ponds, wetlands, and meadows. This creates many habitats for all kinds of different species to live in. Play a crucial role in biodiversity in the ecosystem.

Keystone Species

Ecological Succession  Ecological Succession Succession Changes to a community What Causes it? Biotic Factors Abiotic Factors

2 Types of succession  Primary Secondary From nothing Even the soil must be “created” Ex. Volcanic eruptions and glacial retreat Secondary From soil Disaster can strike and make it start over Ex. Fire, flood, and other natural disasters

Primary Succession

Secondary Succession

Pioneer Species  Species that colonize barren habitats Lichens, small plants with brief life cycles Improve conditions for other species who then replace them

 Climax Community Stable array of species that remains relatively unchanged over time Contains large woody mature trees Succession does not always move predictably toward a specific climax community; other stable communities may persist

The trend of Succession  Pioneer stage Climax Community