Biodiversity flashcards

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What is meant by “Genetic diversity” in this lesson?Genetic, species, and ecosystem diversity: Genetic diversity is variation in hereditary information within or among populations.
What is meant by “Species diversity” in this lesson?Genetic, species, and ecosystem diversity: Species diversity reflects both the number of species and their relative abundances.
What is meant by “Ecosystem diversity” in this lesson?Genetic, species, and ecosystem diversity: Ecosystem diversity is the variety of ecosystems or habitat types in a region.
What is meant by “Species richness” in this lesson?Genetic, species, and ecosystem diversity: Species richness is the number of species in a defined area or sample.
What is meant by “Species evenness” in this lesson?Genetic, species, and ecosystem diversity: Species evenness describes how evenly individuals are distributed among species.
What is meant by “Endemic species” in this lesson?Genetic, species, and ecosystem diversity: An endemic species is native to a restricted geographical region.
What is meant by “Provisioning service” in this lesson?Ecosystem services: Provisioning services are products obtained from ecosystems.
What is meant by “Regulating service” in this lesson?Ecosystem services: Regulating services arise from ecological processes that moderate environmental conditions.
What is meant by “Cultural service” in this lesson?Ecosystem services: Cultural services include recreational, educational, aesthetic, and spiritual benefits.
What is meant by “Pollination service” in this lesson?Ecosystem services: Animal-mediated pollination enables reproduction in many wild and cultivated plants.
What is meant by “Water purification” in this lesson?Ecosystem services: Ecosystem processes can remove or transform some contaminants, with capacity depending on conditions.
What is meant by “Service trade-off” in this lesson?Ecosystem services: Changing an ecosystem can increase one benefit while reducing another.
What is meant by “Habitat loss” in this lesson?Threats to biodiversity: Habitat loss removes or changes the conditions needed by organisms.
What is meant by “Fragmentation” in this lesson?Threats to biodiversity: Fragmentation divides habitat into smaller separated patches and can alter movement and edge conditions.
What is meant by “Invasive species” in this lesson?Threats to biodiversity: An invasive species is a nonnative organism whose establishment causes harm under the relevant definition.
What is meant by “Overexploitation” in this lesson?Threats to biodiversity: Overexploitation removes organisms faster than populations can replenish under prevailing conditions.
What is meant by “Pollution pressure” in this lesson?Threats to biodiversity: Contaminants can impair organisms or change ecosystem processes depending on exposure.
What is meant by “Conservation connectivity” in this lesson?Threats to biodiversity: Connectivity allows movement or ecological exchange among habitats, though designs require local assessment.