Skip to content

Quiz: Ecological Restoration

Test your understanding of restoration ecology principles, techniques, and long-term management strategies.

1. How does ecological restoration differ from garden design?

  1. Restoration focuses only on rare and endangered species
  2. A garden is designed primarily for human enjoyment, while restoration aims to re-establish ecological processes that allow a plant community to sustain itself
  3. Restoration uses only non-native plants to stabilize degraded sites
  4. There is no meaningful difference between the two
Show Answer

The correct answer is B. While a garden is designed primarily for human enjoyment and aesthetics, ecological restoration aims to repair damaged ecosystems by re-establishing the ecological processes — nutrient cycling, pollination, natural disturbance, seed dispersal — that allow a plant community to sustain itself over time. Restoration success is measured by ecosystem function, not just appearance. Both use native plants, but their goals and success criteria differ fundamentally.

Concept Tested: Restoration Ecology Basics

See: Chapter 12

2. What is a "reference ecosystem" in the context of ecological restoration?

  1. A laboratory experiment that simulates ecosystem conditions
  2. A nearby healthy, intact example of the plant community you are trying to restore, used as a model for species composition and structure
  3. A textbook diagram showing ideal ecological relationships
  4. The ecosystem that existed millions of years ago before humans arrived
Show Answer

The correct answer is B. A reference ecosystem is a nearby healthy, intact example of the type of plant community you are trying to restore. It serves as a model for species composition, structure, and ecological function. For example, if you are restoring a mesic prairie, you would study a high-quality remnant prairie in your region to understand which species should be present, their relative abundance, and how the community functions. Reference ecosystems guide realistic goal-setting.

Concept Tested: Reference Ecosystems

See: Chapter 12

3. Why is the first year of a prairie restoration expected to look weedy?

  1. The wrong seed mix was used
  2. Native perennials invest energy in root growth below ground during the first year while fast-growing annual weeds dominate above ground
  3. Prairie plants cannot compete with any weed species
  4. The site preparation was insufficient
Show Answer

The correct answer is B. During the first year, annual weeds germinate quickly and appear to dominate the site. However, native perennial grasses and wildflowers are investing their energy in building deep root systems below the surface. This is normal and expected. The recommended response is to mow the site to 6-8 inches two to three times in the first season to prevent weeds from shading out native seedlings, while being patient as the native plants establish. By the third year, native species typically begin to dominate.

Concept Tested: Prairie Restoration

See: Chapter 12

4. What is successional planting in the context of restoration?

  1. Planting all species at once and letting the strongest survive
  2. Planting fast-establishing species first to stabilize the site, then introducing slower-establishing species in phases that mimic the natural sequence of ecosystem development
  3. Planting trees before any other vegetation
  4. Removing all vegetation and waiting for nature to restore itself
Show Answer

The correct answer is B. Successional planting mimics the natural process of ecosystem development by installing species in phases. Fast-establishing species like cool-season grasses and quick-germinating wildflowers stabilize the site first. Slower-establishing species like Prairie Dropseed and Compass Plant are introduced in later phases. This approach mirrors how natural plant communities develop over time and gives each species the conditions it needs to succeed.

Concept Tested: Successional Planting

See: Chapter 12

5. What three categories of conditions should be assessed before beginning a restoration project?

  1. Budget, labor availability, and equipment access
  2. Physical conditions (soil, hydrology, sunlight), biological conditions (existing plants, invasives, wildlife), and land use history
  3. Aesthetic preferences, neighbor approval, and property value impact
  4. Rainfall patterns, wind direction, and average cloud cover
Show Answer

The correct answer is B. A thorough restoration site assessment covers three categories: physical conditions (soil type, hydrology, topography, sunlight), biological conditions (existing native plants, invasive species present, wildlife use), and land use history (former agriculture, recent clearing, construction disturbance). Each provides essential information for choosing appropriate strategies. For example, former agricultural land may have compacted soil and a depleted native seed bank, requiring different approaches than a recently cleared woodland.

Concept Tested: Restoration Site Assessment

See: Chapter 12

6. What is adaptive management, and why is it important in restoration projects?

  1. A management approach where you make a plan and follow it exactly without changes
  2. A strategy of trying random approaches until something works
  3. A systematic process of monitoring results and adjusting management methods based on what is working and what is not
  4. A technique for adapting non-native plants to function like natives
Show Answer

The correct answer is C. Adaptive management is the systematic process of monitoring restoration outcomes and adjusting techniques based on results. Because ecosystems are complex and unpredictable, even well-planned restorations encounter unexpected challenges — weed species that were not anticipated, native species that fail to establish, or changes in hydrology. Adaptive management treats each management action as an experiment, learns from the results, and adjusts the approach accordingly.

Concept Tested: Adaptive Management

See: Chapter 12

7. Why is designing for year-round interest important in a restoration planting?

  1. It increases property value by exactly 25% in all cases
  2. It provides continuous habitat resources for wildlife and pollinators, prevents erosion in all seasons, and maintains public support by looking intentional rather than neglected
  3. It is required by Minnesota restoration regulations
  4. Only spring-blooming plants have ecological value
Show Answer

The correct answer is B. Designing for year-round interest serves multiple purposes: continuous bloom from spring through fall supports pollinators across seasons, standing winter seed heads and grasses provide food and shelter for birds, persistent vegetation prevents soil erosion year-round, and an attractive appearance in all seasons maintains community support. Plantings that look like "weedy lots" in winter or spring can face complaints and even removal, so visual year-round interest is both ecologically and socially important.

Concept Tested: Year-Round Landscape Plan

See: Chapter 12

8. You are restoring a wetland site that was previously drained for agriculture. What should you address first before planting native wetland species?

  1. Install decorative signage explaining the restoration
  2. Restore the hydrology by removing or modifying drain tiles to allow natural water levels to return
  3. Plant trees immediately to provide shade for wetland species
  4. Add fertilizer to compensate for nutrient-depleted agricultural soil
Show Answer

The correct answer is B. For wetland restoration, restoring hydrology is the critical first step. Most agricultural wetland conversions involved installing drain tiles or ditches to remove water. Removing, plugging, or modifying these drainage systems allows natural water levels to return, which is essential for wetland plant establishment. Native wetland plants require specific water depths and seasonal fluctuations. Without proper hydrology, even the best planting plan will fail because the species are adapted to wet conditions that no longer exist.

Concept Tested: Wetland Restoration

See: Chapter 12

9. How long does a typical prairie restoration take to begin resembling a mature native prairie?

  1. One growing season if the right seed mix is used
  2. Three to five years for initial establishment, with increasing diversity and structure developing over 10-20 years or more
  3. Exactly two years regardless of site conditions
  4. Six months with proper fertilization and irrigation
Show Answer

The correct answer is B. Prairie restoration is a long-term endeavor. The first year typically looks weedy. By years two to three, native grasses and early wildflowers begin to establish. By years three to five, the planting starts to look recognizably prairie-like. Full diversity and structure continue developing for 10-20 years or more, as slow-establishing species like Prairie Dropseed and Compass Plant mature. A restored prairie may never fully replicate a remnant prairie that developed over thousands of years, but it can provide significant ecological value.

Concept Tested: Restoration Timelines

See: Chapter 12

10. What is phenology, and how does understanding it help restoration practitioners?

  1. The study of plant genetics and heredity
  2. The study of how seasonal and climatic changes affect the timing of biological events like blooming, leaf-out, and migration
  3. The study of soil chemistry and nutrient cycling
  4. The study of how plants reproduce through seed dispersal
Show Answer

The correct answer is B. Phenology is the study of how seasonal and climatic changes affect the timing of biological events such as plant blooming, leaf emergence, bird migration, and insect emergence. For restoration practitioners, understanding phenology helps with scheduling seeding and planting windows, timing prescribed burns to benefit target species, designing continuous bloom sequences for pollinators, and monitoring climate change effects on plant communities. Phenological knowledge ensures that management activities align with natural cycles.

Concept Tested: Phenology Basics

See: Chapter 12

Ready to use these ideas rather than recall them? Try the Applied Quiz for this chapter — ten scenario questions that put you in a situation and ask what to do.