Deforestation | AQA A-Level Environmental Science Revision | Primrose Kitten

Removal of trees from a landscape.

Deforestation

Maximum harvestable amount without depleting population.

Sustainable Yield

Highest number of individuals harvested sustainably.

Maximum Sustainable Yield (MSY)

Speed at which a tree species grows.

Growth Rate

How a tree species reproduces sexually.

Pollination Method

How seeds are spread from parent trees.

Seed Dispersal

Reflectivity of Earth's surface affecting temperature.

Albedo

Gases trapping heat in the atmosphere.

Greenhouse Gases

Localized climate conditions influenced by trees.

Microclimate

Water vapor release by trees into the atmosphere.

Transpiration

Rainwater captured by tree canopies before reaching ground.

Rainfall Interception

Removal of topsoil by wind or water.

Soil Erosion

Decomposed material contributing to soil fertility.

Organic Matter (DOM)

Organic component of soil formed from decomposed matter.

Soil Humus

Disruption in food web due to species loss.

Trophic Cascades

Reduction in variety of species in an ecosystem.

Biodiversity Decline

Separation of habitats leading to isolated populations.

Habitat Fragmentation

Removal of all trees from an area rapidly.

Clear Felling

Ability of soil to support plant growth.

Soil Fertility

Breeding between closely related individuals, reducing genetic diversity.

Inbreeding

Excess water in soil, reducing oxygen availability.

Waterlogging

Water flow over land, increasing flood risk.

Surface Runoff

Changes in local climate due to deforestation.

Climate Impact

Plants with potential health benefits for humans.

Medicinal Species

Plants that provide nutritional resources.

Food Species

Clearing land by cutting and burning vegetation.

Slash and Burn

Crops grown primarily for sale and profit.

Cash Crops

Remains after burning vegetation, enhances soil fertility.

Nutrient-Rich Ash

Species not naturally found in a specific area.

Non-Indigenous Species

Interactions between different species in an ecosystem.

Inter-Species Relationships

Area planted with only one tree species.

Single-Species Plantation

Cultivation of a single crop or species.

Monoculture

Variety of genes within a species population.

Genetic Diversity

Planting seedlings closely to promote competition.

Close Planting

Number of trees planted per unit area.

Planting Density

All trees planted at the same time.

Simple-Age Structure

Decaying wood providing habitat for various species.

Dead Wood Habitat

Young trees that are still growing.

Saplings

Upper layer of trees in a forest.

Canopy

Chemicals used to kill pests affecting crops.

Pesticides

Amount of product harvested from an area.

Yield

Community of living organisms and their environment.

Ecosystem

Roles or positions of species within an ecosystem.

Niches

Number of different species in a given area.

Species Richness

Price at which goods can be sold.

Market Value