B.S.F. or B.Sc.F. Bachelor of Science in Forestry Bachelor of Science in Forestry: Wildlife Ecology and Habitat Preservation 5 — Questions and Answers
Question 1: Biological invasion by non-native species most commonly threatens native wildlife by:
- Increasing structural complexity of forest habitats
- Competing for resources, introducing novel diseases, and altering habitat structure (Correct answer)
- Providing additional food sources for native generalist species
- Reducing edge effects in fragmented landscapes
Correct answer: Competing for resources, introducing novel diseases, and altering habitat structure
Invasive species displace natives through competition, introduce pathogens like white-nose syndrome in bats, and alter habitat (e.g., kudzu smothering forest understories) that native species depend on.
Question 2: Which remote sensing technology is most commonly used to map forest canopy structure and identify habitat features like snags and coarse woody debris?
- Multispectral satellite imagery
- Light Detection and Ranging (LiDAR) (Correct answer)
- Synthetic aperture radar (SAR)
- Thermal infrared imaging
Correct answer: Light Detection and Ranging (LiDAR)
LiDAR uses laser pulses to create three-dimensional point clouds that accurately characterize canopy height, vertical structure, and ground-level features relevant to wildlife habitat assessment.
Question 3: The 'umbrella species' concept in conservation planning proposes that:
- Legally protected species automatically protect all co-occurring taxa
- Protecting habitat sufficient for a wide-ranging species will incidentally conserve many co-occurring species (Correct answer)
- Keystone species must be prioritized over all other management targets
- Species with large home ranges should be excluded from managed forests
Correct answer: Protecting habitat sufficient for a wide-ranging species will incidentally conserve many co-occurring species
Umbrella species require large habitat areas with specific ecological conditions, so managing for their needs inadvertently protects the habitat and biodiversity of many other associated species.
Question 4: What is the primary ecological rationale for maintaining large diameter trees and old-growth structural features in managed forests?
- Maximizing timber volume for future harvest rotations
- Providing unique microhabitats like deep bark furrows, large cavities, and epicormic branches used by wildlife (Correct answer)
- Increasing canopy closure to reduce invasive understory plants
- Improving soil nutrient cycling through faster decomposition
Correct answer: Providing unique microhabitats like deep bark furrows, large cavities, and epicormic branches used by wildlife
Large old trees develop structural features — deep bark for invertebrates, large cavities for owls and martens, and platform branches for raptors — that younger trees cannot provide.
Question 5: Which federal agency is primarily responsible for managing wildlife on National Forest System lands?
- U.S. Fish and Wildlife Service
- U.S. Forest Service within USDA (Correct answer)
- National Park Service
- Bureau of Land Management
Correct answer: U.S. Forest Service within USDA
The U.S. Forest Service manages wildlife habitat on National Forests, while states retain jurisdiction over wildlife populations, and USFWS handles threatened and endangered species.
Question 6: Trophic cascades in forest ecosystems occur when:
- Nutrient runoff from forests enters adjacent aquatic systems
- Changes in a top predator's abundance ripple through multiple lower trophic levels, altering vegetation and ecosystem structure (Correct answer)
- Tree mortality from insects releases nutrients to the forest floor
- Migratory birds transport seeds between forest patches
Correct answer: Changes in a top predator's abundance ripple through multiple lower trophic levels, altering vegetation and ecosystem structure
When apex predators like wolves are removed, mesopredators and herbivores increase, overgrazing vegetation and restructuring entire ecosystems in a cascade of indirect effects.
Question 7: Adaptive management in wildlife habitat conservation is best described as:
- Implementing a fixed management plan based on best available science
- A structured, iterative process of implementing management actions, monitoring outcomes, and adjusting based on new information (Correct answer)
- Delegating management decisions to local stakeholders without scientific oversight
- Applying identical management prescriptions across all forest types
Correct answer: A structured, iterative process of implementing management actions, monitoring outcomes, and adjusting based on new information
Adaptive management treats management actions as experiments, using monitoring data to evaluate outcomes and update future decisions, improving effectiveness over time despite ecological uncertainty.
B.S.F. or B.Sc.F. Bachelor of Science in Forestry Bachelor of Science in Forestry: Wildlife Ecology and Habitat Preservation 5
Biological invasion by non-native species most commonly threatens native wildlife by: