a gas responsible for the greenhouse effect by absorbing and re-radiating infrared radiation that warms the atmosphere

how many individuals of a species are present

the range of different living organisms (species) that live in a place

Climate change and biodiversity: changes in the distribution of organisms

Biology

Transfers of biomass between trophic levels

Negative human interactions with ecosystems and impacts on biodiversity

Examples of human interactions with ecosystems, including fish farming

Benefits and challenges of maintaining biodiversity

Factors affecting human food security, and possible solutions

Pupils learned about biotic and abiotic components of an ecosystem, measuring population size, interdependence and competition in ecosystems, how changes in biotic and abiotic factors affect communities, the cycling of carbon and water, and the role of microorganisms in cycling materials through ecosystems.

This unit explores trophic levels, biomass pyramids, and the efficiency of biomass transfers in ecosystems. It examines human impacts on biodiversity, factors affecting food security, and biotechnological solutions. Emphasis is on evaluating environmental changes and ethical considerations.

Maintaining biodiversity and human impacts

The species may adapt too quickly to warmer temperatures.

The species may adapt too quickly to cooler temperatures.

The species may adapt too slowly to warmer temperatures.

They migrate to other habitats where they are well adapted.

Why might a species become extinct as a result of climate change?

how many individuals of a species there are

the conditions that a species is adapted to live in

What does the term 'distribution of a species' mean?

There is increased rainfall/precipitation.

Plants are taking up less water from the soil.

Why is climate change causing sea levels to rise?

Which of the following is **not** a main factor that affects the **distribution** of organisms?

The plant will be found at higher altitudes where the temperature is colder.

The plant will be found at lower altitudes where the temperature is warmer.

The plant will remain between the same altitude range.

A species of plant is found in mountains at altitudes between 800 m and 1000 m where the temperature is colder. What will happen to the species of plant as the Earth's temperature increases?

The wildebeest live in habitats where there is lots of rainfall.

Droughts have been occurring more frequently.

The number of wildebeest predators have increased.

What trends or patterns are shown in the graph of the population of wildebeest from 1990-2010?

Which of the following are examples of conservation?

The destruction of habitats through deforestation causes...

farmers use too much fertiliser and this washes into ponds and rivers.

farmers use too much pesticide on their crops which wash into ponds and rivers.

farmers do not use enough fertiliser and it doesn't get into ponds and rivers.

farmers use organic methods to grow crops.

Eutrophication reduces biodiversity in aquatic habitats when...

A species which is naturally found in an area is called a {{ }} species.

Invasive species are prey to many animals.

Invasive species have no natural predators in the area.

Why might a population of an invasive species grow quickly?

habitat protection, introduced species and climate change

urbanisation, quarrying and captive breeding programmes

habitat destruction, humans hunting animals for food and introduced species

What are reasons why species become endangered?

Starter Quiz

Which of the following are examples of conservation?