Land use and peat: habitat and carbon consequences
도입됨| English | 의미 |
|---|---|
| peat/piːt/ | 이탄 |
| habitat fragmentation/ˈhæbɪtæt ˌfræɡmənˈteɪʃn/ | 생육지 파편화 |
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?
난이도 1/5 · 100 코인 + 오늘 첫 완료 시 소액 보너스
Peat extraction destroys a specialist habitat and oxidises carbon stored over millennia, releasing it to the atmosphere. It creates no habitat and frees rather than stores carbon.
Match each technical term to its precise meaning.
난이도 2/5 · 140 코인 + 오늘 첫 완료 시 소액 보너스
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?
난이도 2/5 · 140 코인 + 오늘 첫 완료 시 소액 보너스
Stating the conditions and assumptions lets others repeat the work exactly, and recording the supporting evidence lets them check the conclusion. Hiding disagreeing results removes the evidence that could challenge a wrong conclusion, and one measurement can never establish a wider claim.
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.
난이도 2/5 · 140 코인 + 오늘 첫 완료 시 소액 보너스
The result is 25 %. Known: habitat falls from 120 to 90 hectares. Loss = 30 hectares. Percentage loss = 30/120 x 100 = 25%. Species losses need distribution data - area alone cannot give them.
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: Species differ in how much habitat they need and which parts they use, so area loss and species decline are not proportional. A 25% area loss could extinguish a species confined to the lost quarter.
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%.
난이도 1/5 · 100 코인 + 오늘 첫 완료 시 소액 보너스
Species differ in how much habitat they need and which parts they use, so area loss and species decline are not proportional. A 25% area loss could extinguish a species confined to the lost quarter.
Accumulated partly decomposed organic material in peatland: write the technical term.
난이도 1/5 · 100 코인 + 오늘 첫 완료 시 소액 보너스
peat means Accumulated partly decomposed organic material in peatland.