Unit 1 - Lesson 1: Succession & Sustainability Flashcards
What is succession?
A series of events by which life comes back.
What is primary succession?
Ecological development occurring is an area where no soil or organisms previously existed (Bare rock).
What is secondary succession?
Ecological process occurring when an existing ecosystem experiences a disturbance that does not destroy it, and then is recolonized. (Soil remains)
What is ecological disturbance
An event that changes the structure of a biological community. They can be major, like a volcanic eruption, or minor, like a large tree falling.
What is a pioneer species?
A species that can survive in harsh conditions and tends to make their living by coming into an area after a disturbance.
What is a climax community?
The final stage of ecological succession, where an area has reformed into a new and diverse ecosystem. Climax communities can be similar or very different from the original community.
What are the factors that make a climax community the same or different from the original community?
- The nature of the disturbance (major or minor, how much of ecosystem is left behind)
- Environmental conditions (climate, soil type, species, etc.) during or after the disturbance
How long does primary succession take?
100s to 1000s of years
How long does secondary succession take?
50 to 150 years
What does diversity in plant species create a more resilient ecosystem?
Diversity means that an ecosystem won’t be greatly affected by disruptions such as disease, competition from invasive species, extreme weather, etc. because it is more likely that at least some plants will survive the disruption.
How would a smaller disturbance such as a tree falling benefit wildlife?
It would clear a space is the canopy, allowing light to hit the ground again. Secondary succession will occur in that area, and a variety of species will grow, creating a more diverse ecosystem.
