D4.2 Stability and Change
15 review questions with answers for D4.2 Stability and Change, marked SL. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Predictable change in species composition over time?
- Ecological SuccessionRight answer
- Primary succession
- Secondary succession
- Pioneer species
All 15 questions and answers
Predictable change in species composition over time?
Answer: Ecological Succession
Succession on bare rock/substrate with no pre-existing soil?
Answer: Primary succession
Succession after a disturbance (fire/storm) where soil remains?
Answer: Secondary succession
First organisms to colonize (e.g., lichen/mosses)?
Answer: Pioneer species
Stable, final stage of a community in equilibrium?
Answer: Climax community
Ability of an ecosystem to withstand a disturbance?
Answer: Resistance
Ability of an ecosystem to recover after a disturbance?
Answer: Resilience
Ripple effect in a food web when one level is changed?
Answer: Trophic cascade
Toxin concentration increasing up the food chain?
Answer: Biomagnification
Nutrient enrichment of water (e.g., fertilizer run-off) causing algal blooms and oxygen depletion?
Answer: Eutrophication
Plastic fragments smaller than 5 mm that pollute oceans and enter food chains?
Answer: Microplastics
Species with a disproportionately large impact on their environment?
Answer: Keystone species
Point where an ecosystem cannot return to its original state?
Answer: Tipping point
Accumulation of a substance within a single organism over time?
Answer: Bioaccumulation
Ratio of gross productivity to respiration in a climax community?
Answer: 1 : 1 (Energy in = Energy out)
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options are other answers from the same set.