Restoration Ecology and Ecological Restoration Study Notes
Restoration Ecology & Ecological Restoration
Course Title: LARCH 145 - FALL 2025
Terminology
Restoration Ecology
Definition: The scientific discipline of developing and/or applying theory to guide restoration.
Comprises the application of ecological theory to the restoration of ecological systems.
Serves as the basis for Ecological Restoration, which is the actual practice of restoring ecosystems.
Ecological Restoration
Definition: The process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed.
Aims to return the site to some historical state.
Implies that the current state of the ecosystem is not desirable.
Foundations of Restoration Ecology
Population Characteristics
Key Components: Age structure, birth and death rates.
Community Characteristics
Key Aspects: Species diversity, niche structure, and succession.
Ecosystem Characteristics
Focus Areas: Trophic levels, nutrient flows, and soil composition.
Temporal Dynamics
Human Interactions
Disturbances
Landscapes
Biomes
Focus of Restoration Efforts
Levels of Ecological Organization: Considerations regarding which level restoration should focus on include:
Community
Population
Individual
Ecosystem
Landscape
Biosphere
Historical Perspectives on Ecological Restoration
George Perkins Marsh (1801 – 1882)
Work: "Man & Nature" (1864).
Context: Contemporaneous with Romantic-Transcendentalists (e.g., Emerson, Muir, Thoreau).
Key Insight: Anthropogenic imbalances in Nature “did not correct themselves automatically… Humans had to restore what humans had disturbed.”
Aldo Leopold (1887 – 1948)
Work: "A Sand County Almanac" (1949).
Contribution: Milestone in plant community restoration; restoration of approximately 120 hectares of forest and prairie at the University of Wisconsin Arboretum during the 1930s.
Jared Diamond (b. 1937)
Work: "Collapse" (2005).
Theme: Human history is full of examples of societies that experienced over-exploitation and habitat destruction without restoration, leading to societal collapse.
Reference Ecosystems
Role in Planning Restoration Projects
Require multiple sites across a range of conditions.
A restored site can meet various ecological conditions.
Reference Information for Restoration
Types of Reference Information
Actual site data.
Ecological data from sites scheduled for destruction.
Written descriptions and photographs.
Herbarium or museum data.
Historical accounts and oral histories.
Paleoecological evidence.
Conservation Biology
Definition: Analyzing and preserving biodiversity before damage occurs.
Focus: Often emphasizes conserving remaining wildlife and habitats.
Challenges: Hard to conserve biodiversity without implementing restoration efforts beforehand.
Environmental Values of Restoration
Benefits:
Retains precipitation and contributes to the water cycle.
Diversifies habitats and stabilizes soils.
Increases biodiversity and improves carbon storage.
Addresses cultural issues relating to Native American communities.
Attributes of Restored Ecosystems
Characteristics:
Consist of a characteristic assemblage of native species.
Include all functional groups present.
Can sustain reproducing populations.
Integrate into the larger landscape.
Are resilient enough to withstand periodic stress.
Are self-sustaining.
Different Types of Ecological Restoration
Rehabilitation: Improves a site from its degraded state.
Enhancement or Augmentation: Improves a few ecosystem functions without restoring the full ecological condition.
Reclamation: Associated with mines or waste dumps, focusing on detoxification and terrain stabilization.
Replacement: Refers to specifying a novel community type to achieve a particular conservation goal, often with less regard for ecosystem structure.
Remediation: Similar to reclamation but focuses on removing chemical contaminants using biotic, chemical, or physical means to protect human and ecosystem health.
Re-creation: Constructs a new biological community after anthropogenic disturbance has eliminated the original community, often aiming to match a historic condition.
Restoration Trajectories
Diagram Insights:
The diagram illustrates biomass and nutrient cycling, species complexity, and overall ecosystem structure in relation to restoration efforts.
It examines paths from degraded ecosystems to restored ecosystems through various stages such as rehabilitation, replacement, and ecological restoration.
U.S. Legislative Framework for Ecological Restoration
Clean Water Act (1972):
Objective: To restore and maintain the chemical, physical, and biological integrity of the nation’s surface waters.
Includes a mandate for mitigation associated with unavoidable impacts on wetlands, requiring restoration actions elsewhere.
Surface Mining Control and Reclamation Act (1977):
Purpose: To prevent adverse effects of surface mining, particularly coal mining.
Requires mining companies to restore mined sites, typically through reclamation practices.
Case Studies of Species Reintroduction
Whooping Crane (Grus americana):
Current Status: Once had 41 wild individuals in 1941; population increased to approximately 350 today.
Reintroduction Challenges: Cross-fostering with Sandhill Cranes failed due to imprinting issues.
Methodologies: Involves captive breeding and migratory training using light aircraft for re-establishing the population in Wisconsin-Florida migratory routes.
Wolves (Canis lupus) in Yellowstone:
Notable Event: Translocation of wolves from Alberta, Canada to Yellowstone in January 1995.
Ecological Impact: Restoration efforts linked to the recovery of the aspen ecosystem in Yellowstone due to wolf predation dynamics.
Rewilding Initiatives
Pleistocene Megafauna Re-creation Proposal:
Some conservation biologists propose re-creating North American Pleistocene fauna with modern analogs, such as African elephants and South American camelids.
This effort aims to restore ancient ecological roles that these species played in their ecosystems.
Key Ecological Goals for Restoration
Restore natural ecosystem processes.
Re-establish native species and their functional roles, particularly ecosystem engineers and foundation species.
Remove, control, and monitor exotic species to protect restored ecosystems.
Steps in Restoration Ecology
Conduct a feasibility study including factors like autecology and availability of stockers fulfilling functional roles.
Select sites within historic ranges but protected from similar threats.
Identify and evaluate stock genetics to ensure suitable breeding.
Assess social, political, and economic conditions impacting long-term survival of restoration efforts.
Engage stakeholders and secure necessary financing; design the process as an experiment to evaluate success.
Implement post-release monitoring using adaptive management models to track ecosystem recovery.
Challenges Associated with Reintroduction
Common challenges include:
High juvenile mortality rates.
Loss of rare alleles and genetic diversity.
Reproductive dysfunction challenges linked to inbreeding in small populations.
Environmental Regulations and Restoration
Restoration can entail significant costs (e.g., $3 per square foot or $130K/acre) and various hurdles.
Regulatory Framework in the U.S.:
Influences from the Dust Bowl led to the development of management techniques by the Natural Resources Conservation Service.
NEPA (1969): Established environmental standards. Proposed under Nixon's administration and led to the creation of the EPA for its implementation.
Wetland restoration efforts significantly stem from the Clean Water Act (1972), aiming for “no net loss” of area and ecological function.
Other pertinent laws include:
Endangered Species Act (1973): Designed to conserve ecosystems on which endangered and threatened species rely, allowing for conservation programs for these populations but facing limitations (e.g., plans for plant protection without equivalent for animals unless they are endangered).
Mitigation Requirements: For projects impacting endangered species, habitat mitigation must be executed.
Conclusion/Reflection
Cultural Reflection: Quoting the Lorax, highlighting the importance of individual stewardship in environmental conservation and restoration efforts:
“And all that the Lorax left here in this mess was a small pile of rocks, with the one word… 'UNLESS'.”
Emphasizes the need for individual action in addressing ecological degradation: “UNLESS someone like you cares a whole awful lot, nothing is going to get better. It's not.”