Land use and peat: habitat and carbon consequences
| English | Français |
|---|---|
| peat/piːt/ | tourbe |
| habitat fragmentation/ˈhæbɪtæt ˌfræɡmənˈteɪʃn/ | fragmentation des habitats |
What would explain this observation?
- Peat 泥炭 can be sold as compost while its removal destroys a habitat and exposes stored carbon. An evaluation needs both production and environmental consequences.
- Start with a prediction. State the quantities or features you would compare, then decide what evidence could distinguish two explanations.
Build the model
- Building, quarrying, farming and dumping waste reduce land available for other organisms. Habitat removal affects plants, animals and microorganisms, and fragmentation can separate surviving populations. Peat bogs support particular communities; extracting peat for garden compost reduces this habitat and its biodiversity.
- peat: Accumulated partly decomposed organic material in peatland; habitat fragmentation 生境破碎化: Division of a habitat into separated patches.
Which pair describes two peat-extraction consequences?
Peat contains accumulated organic material. Decay or burning releases carbon dioxide into the atmosphere. Keeping peat intact helps retain that carbon store. The specification asks students to weigh cheap available compost and food-production needs against habitat conservation and reduced emissions. Alternative materials also require evidence about cost, performance and environmental impacts.
Match each technical term to its precise meaning.
Use the definitions to distinguish related quantities and processes.
Choose evidence that can test it
- Peat contains accumulated organic material. Decay or burning releases carbon dioxide into the atmosphere. Keeping peat intact helps retain that carbon store. The specification asks students to weigh cheap available compost and food-production needs against habitat conservation and reduced emissions. Alternative materials also require evidence about cost, performance and environmental impacts.
- Use supplied land-area and carbon-account records to compare proposals. Distinguish the area directly removed from surrounding habitat affected by drainage or fragmentation. State the stakeholder benefit and the ecological cost, then identify practical alternatives and what monitoring could test their effects.
Which two habits make the investigation or model in this case more defensible?
Use supplied land-area and carbon-account records to compare proposals. Distinguish the area directly removed from surrounding habitat affected by drainage or fragmentation. State the stakeholder benefit and the ecological cost, then identify practical alternatives and what monitoring could test their effects.
Work from known quantities
- State the known values and their units. Choose the relation because its assumptions fit this case, then rearrange before substitution.
- Known: a fictional peat habitat falls from 80 to 60 hectares after the stated land-use change. Area loss = 20 hectares, or 25% of the starting area. This does not imply a 25% loss of every species: species distribution and habitat quality are also needed.
A model peat habitat falls from 120 to 90 hectares. Find percentage area loss. Use the same sequence: known quantities → model → relation → substitution → unit and interpretation.
A model peat habitat falls from 120 to 90 hectares. Find percentage area loss.
The result is 25 %. Known: a fictional peat habitat falls from 80 to 60 hectares after the stated land-use change. Area loss = 20 hectares, or 25% of the starting area. This does not imply a 25% loss of every species: species distribution and habitat quality are also needed.
Check the conclusion and its limits
- Peat is not simply an inexhaustible mineral fertiliser. Habitat loss and carbon release are separate consequences. A percentage area change cannot be converted directly into carbon emissions without a supplied carbon-density and release model.
- Return to the original observation. Explain what the result supports, which conditions it assumes, and one way to test a competing explanation.
A 25% habitat-area loss proves every species declined by exactly 25%. This claim is false: Peat is not simply an inexhaustible mineral fertiliser. Habitat loss and carbon release are separate consequences. A percentage area change cannot be converted directly into carbon emissions without a supplied carbon-density and release model.
Land use and peat: habitat and carbon consequences: Peat contains accumulated organic material. Decay or burning releases carbon dioxide into the atmosphere. Keeping peat intact helps retain that carbon store. The specification asks students to weigh cheap available compost and food-production needs against habitat conservation and reduced emissions. Alternative materials also require evidence about cost, performance and environmental impacts.
A 25% habitat-area loss proves every species declined by exactly 25%.
Peat is not simply an inexhaustible mineral fertiliser. Habitat loss and carbon release are separate consequences. A percentage area change cannot be converted directly into carbon emissions without a supplied carbon-density and release model.
Accumulated partly decomposed organic material in peatland: write the technical term.
peat means Accumulated partly decomposed organic material in peatland.