Maintaining biodiversity (AQA GCSE Biology): Flashcards

Four main reasons to maintain biodiversity

1. Moral/ethical 2) Aesthetic 3) Ecosystem structure 4) Value to humans

Moral reason for protecting biodiversity

Responsibility to look after other species and protect them

Aesthetic reason for maintaining biodiversity

Makes world beautiful and interesting to explore

Why ecosystem structure matters for biodiversity

All organisms depend on each other in ecosystems

Role of decomposer microorganisms

Essential for carbon cycle to work properly

How species provide value to humans

Plants provide medicines, wildlife attracts tourists

Protected habitat type for rare species

Wetlands - protected to keep rare species safe

Purpose of replanting hedgerows

Creates corridors connecting different habitats for wildlife

How recycling helps biodiversity

Reduces harmful activities like quarrying for new materials

How reforestation prevents soil erosion

Tree roots hold soil together and stop it washing away

How trees help tackle climate change

Absorb carbon dioxide during photosynthesis

Definition of extinction

No living individuals of a species remain anywhere

Definition of endangered species

High risk of extinction with dangerously small populations

Purpose of breeding programmes

Increase populations and prevent inbreeding in endangered species

Why scientists monitor large carnivores

At top of food chains, indicates if ecosystem is healthy