Ecosystems & Conservation Decisions — Extension · Life Science: Biology, Grade 10
Analyze populations, food webs, cycles, disturbance, and evidence for conservation designs.
Evaluate a Habitat-Restoration Design
Investigate
Do monitored sites show a pattern consistent with a restoration benefit?
Use three sessions: define question, boundary, model and route; collect or analyze the supplied repeated records; then graph, explain, revise and submit the notebook. Home-study activities do not certify NYSED laboratory minutes or mandated investigations.
Materials
- Supplied standardized survey data
- Calculator
- Graph paper
Before you begin
Use the supplied paper-and-data model. This activity requires no biological samples, cultures, personal health information, or tests on people.
Plan a fair test
Compare restoration and untreated sites with the same survey effort and season. Counts are observed richness, not complete censuses. Sites may differ at baseline; compare changes and examine confounders.
Method
- State the restoration goal and the biological measure used.
- Graph richness over years for both sites.
- Calculate each site’s baseline-to-final change.
- Compare changes while preserving the raw values.
- Identify at least two alternative explanations or missing measures.
- Recommend a follow-up monitoring design with additional sites, abundance measures, and a practical constraint.
Open the investigation data (illustrative)
Illustrative data authored for this activity, not an actual experiment or an official mandated investigation. Use them as supplied evidence, not as your own observations.
| Year | Restoration site richness | Untreated site richness |
|---|---|---|
| 0 | 6 | 7 |
| 1 | 7 | 7 |
| 2 | 9 | 8 |
| 3 | 10 | 8 |
Analyze and explain
- How much did each site change, and what is the difference in changes?
- Why is higher final richness alone insufficient to prove restoration caused it?
- What tradeoff and additional outcome should a design decision include?
- Separate collected measurements from the supplied illustrative records.
- Explain how labeled mechanisms constrain the pattern rather than only restate the graph.
- Propose a further comparison that could distinguish an alternative explanation.
What a strong explanation includes
- Shows both site trajectories and baseline differences
- Uses comparable effort and change calculations
- Distinguishes observed richness from all biodiversity
- Proposes replication, confounder checks, and criteria/constraints
- State units, boundary, comparable conditions and model assumptions.
- Retain a first explanation and an evidence-supported revision.
Parent / teacher guide: discuss after the investigation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.
Compare this model with the learner’s actual evidence. Different measurements can support a different conclusion; check the reasoning and limitations, not matching wording.
Extend the chapter investigation by evaluating its evidence and proposing a better test.
Problem 1
Answer and explanation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.
Problem 2
Answer and explanation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.
Problem 3
Answer and explanation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.
Problem 4
Answer and explanation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.
Problem 5
Answer and explanation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.
Problem 6
Answer and explanation
The restored site increases by four observed species; the untreated site by one. The difference in changes is three species. This supports further testing of a restoration effect, but one site per condition cannot separate all site-specific changes. Repeat across matched sites and seasons, track abundance and species identities, and evaluate cost, maintenance, and habitat function. A complete response also states the system boundary, units, matched conditions and limitations. Distinguish supplied illustrative outcomes from collected measurements, and explain why your revised mechanism fits the relevant evidence. Different observations should be interpreted rather than replaced to match the example.