5. Ecosystem Services and Ecological Migration: Comprehensive Study Notes

Environmental Context and Ecosystem Services in South Africa

• Status of Natural Resources: South Africa possesses significant mineral and biodiversity wealth but faces critical environmental challenges.     * Water Resources: The country is characterized by scarce water resources.     * Environmental Degradation: Issues include serious environmental degradation, pollution, and habitat degradation.     * Fisheries and Species: There are overexploited fisheries and widespread problems with alien invasive species.     * Hydrological Alteration: Significant changes to natural water systems have occurred.

• Carbon Intensity: South Africa has a carbon-intensive economy due to a heavy reliance on coal, resulting in high contributions of greenhouse gas emissions.

• Climate Change Impacts: The effects are already evident through:     * Severe droughts and floods.     * Observable sea-level rise along the coastline.

• Developmental Balance: A primary challenge is balancing economic development demands on natural resources with the reality of severe resource limitations, particularly for poverty-stricken populations.

Categorization of Ecosystem Services

• Provisioning Services: These represent the material or energy outputs from ecosystems.     * Food.     * Raw materials.     * Fresh water.     * Medicinal resources.

• Regulating Services: These are services provided by the ecosystem that act as regulators.     * Air quality regulation.     * Climate regulation.     * Water regulation (timing and magnitude of runoff).     * Erosion regulation.     * Water purification and waste treatment.     * Pest regulation.     * Disease regulation.     * Pollination.     * Moderation of extreme events.

• Cultural Services: These are the non-material benefits people obtain from ecosystems.     * Aesthetic values.     * Spiritual and religious values.     * Physical and mental health benefits.     * Recreation and ecotourism.

• Supporting Services: These are necessary for the production of all other ecosystem services.     * Nutrient cycling.     * Photosynthesis.     * Soil formation.

• Research Trends: Human activities are directly and indirectly causing a decline in the quantity and quality of these services, impacting livelihoods and well-being, especially for the poor.

Environmental and Resource Economics (ERE)

• Core Focus: ERE focuses on understanding the causes of environmental issues and finding solutions within the context of sustainable development.

• Analytical Tools: It provides tools to articulate the value of biodiversity and the costs of environmental degradation.

• Environmental Valuation: Determining optimal protection levels requires weighing costs against benefits.     * South Africa is committed to a minimum level of protection; protection beyond that must be economically beneficial (e.g., water resource management).

• Production Possibilities Frontier (PPF):     * A 2D PPF represents the trade-offs in water allocation between users and the environment.     * It illustrates the opportunity costs of licensing activities that consume water or impact aquatic ecosystems in terms of lost values.     * Conversely, it shows the opportunity costs of conservation that limits water use.

• Economic Relationships:     * As the value of economic activities increases, the value of ecosystem services decreases, and vice versa.

• Total Economic Value (TEV) Concept: The total value of an asset or ecosystem is a summation of:     * Direct Use Values.     * Indirect Use Values.     * Option Values.     * Non-Use Values.

• Ecosystems as Natural Capital: Ecological economists define ecosystems as "Natural Capital" because they provide goods and services similar to man-made capital.

Evolution and Technology in Valuation

• Historical Development: Barbier (1994) improved the concept of ecological goods and services by adding attributes like beauty, rarity, and diversity.

• Technological Improvements: The inclusion of spatial data from Geographic Information Systems (GIS) and remote sensing has improved valuation.

• Specific Examples of Value Identification:     * The role of forests in reducing water treatment costs.     * Natural vegetation surrounding farms boosting income for small-scale farmers via bee pollination.

The South African Perspective on Ecosystem Services

• Biodiversity Statistics (Le Maitre et al. 2007):     * South Africa covers only $2\,$ of the Earth’s surface.     * It contains $10\,$ of global plant species and $7\,$ of all vertebrates.     * It is home to $3$ out of $34$ global biodiversity hotspots.

• Links to Welfare:     * Commercial: Tourism centered on the "Big 5."     * Subsistence: Critical food and water sectors.

• Socio-Political Influence:     * Cultural backgrounds and the legacy of Apartheid influence how people value the environment.     * Environmental issues are often perceived as the preoccupation of wealthy white groups and anti-development groups due to historical lack of access to these services.

• National Accounting: One valuation method is creating natural resource accounts to show wealth generation from ecosystem services.     * Example: $1\,m^3$ of water generates $R19$ of GDP when excluding agriculture, and $R65$ when agriculture is included (Le Maitre et al. 2007).

Case Studies and Findings (Le Maitre et al. 2007)

• Kruger National Park (KNP): Approximately $30\,$ of KNP's value is attributed to its healthy river systems. Diverting this water would result in a loss of $R380\text{ million/year}$ in recreational value alone.

• Western Cape Fynbos Region:     * Water delivery from a hypothetical catchment is estimated at $R35 \text{ to } R75 \text{ ha/year}$.     * Turpie et al. estimated the total annual value of biodiversity in the Cape Floristic region and adjacent marine environment at approximately $R9.6\text{ billion}$ (primarily tourism and consumption).     * Additional value: Mountain catchments water adds $R119\text{ billion}$ (2004) to the Western Cape Economy.     * Additional value: Irrigation water for fruit, vineyards, and grapes adds $R6\text{ billion}$ (2005).

• Economic Losses: Alien plant invasions cause a loss of $R684\text{ million/year}$ for the fynbos biome.

• Harvesting: Commercial harvesting of fish, crayfish, and abalone generates $R1.3\text{ billion}$ annually.

• Identified Issues: Multiple assessments (SAfMA, Gariep Basin, and Millennium Ecosystem Assessments) show marked declines in ecosystem status over the last $50$ years.

Policy and Legal Frameworks

• National Water Act: A key driver for ecosystem-service-based water management.

• The Reserve: A principle requiring water to be set aside for both human and ecological consumption.

• The "People vs. Biodiversity" Debate: There is ongoing conflict regarding whether the ecological reserve is an "either-or" concept or if human and environmental welfare are interdependent.

Environmental Migration

• Definition (IOM, 2007:33): Environmental migrants are individuals or groups who, primarily due to sudden or progressive environmental changes that adversely affect their lives, are obliged or choose to leave their habitual homes, temporarily or permanently, moving within their country or abroad.

• Drivers:     * Climate change is the primary driver.     * In less developed countries, migration is often a mitigation measure.     * Decreased agricultural productivity due to climate change raises food-commodity prices, affecting income and employment, which boosts rural-urban migration.

• South African Context (Mastorillo et al. 2016):     * SA has a highly mobile population, with $12\,$ moving between 2007 and 2011.     * Studies show that black and low-income migrants are more highly affected by climate in their choice to migrate.     * Adverse climate reduces agricultural employment, a strong driver for movement.

• Projections: The World Bank predicts $0.9 \text{ to } 1.5\text{ million}$ internal displacements in South Africa linked to climate change by 2050.

• Project Kukimbia (CSIR): "Kukimbia" is Swahili for "run."     * Studied environmental refugees in Southern Africa.     * Categorized migration factors into sudden onset (e.g., floods in Mozambique) and slow onset (e.g., drought in Zimbabwe).

• Policy Response: The 2011 National Climate Change Response White Paper provides a legal framework for dealing with environmental immigrants.

• Migration Recommendations:     * View migration as a possible adaptation option.     * Adopt shared responsibility for cross-border displacement at bilateral, regional, and international levels.     * Prevent and mitigate displacements for individuals in high-risk areas.     * Conduct rigorous research on the extent and impact of migration in SA.