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topic 6

QuestionAnswer
What does species diversity measure? number and evenness of species
What is Simpson’s diversity index? calculates diversity using richness and abundance
What does a high diversity index mean? greater biodiversity
What does a low diversity index mean? lower biodiversity
What are high-diversity communities resistant to? invasive species
What is an invasive species? organism introduced outside native range
What causes invasive species spread? human transport or disturbance
What harm do invasive species cause? compete and outcompete natives
What allows invasives to thrive? lack of natural predators
What is a keystone species? species with major ecosystem influence
What is an example of a keystone species? coral reefs or honeybees
How do coral reefs act as keystones? provide habitat and food
How do bees act as keystones? pollination supports many species
What happens if keystone species are removed? ecosystem destabilizes
What maintains ecosystem balance? keystone species and producers
What is ecosystem stability? ability to resist change
What is biodiversity’s role? increases ecosystem resilience
What reduces biodiversity? invasive species and habitat loss
What restores biodiversity? conservation efforts
What is ecosystem resilience? ability to recover after disturbance
Why are pollinators important? they support plant reproduction
What do invasive species lack? natural controls or predators
What type of diversity boosts stability? genetic, species, and ecosystem diversity
What is the effect of human introduction of species? ecological imbalance
What happens when diversity declines? reduced productivity and stability
What is an example of mutualistic keystone? bees and flowering plants
What is the result of high biodiversity? better ecosystem recovery
What type of selection maintains diverse species? natural selection
Created by: aayush123654
 

 



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