Comprehensive Ecological Economics Exam Notes

Ecological Economics: Definition & Scope

  • Ecological Economics (EE) studies relationships between human economic systems and natural ecological systems.
    • Integrates economics, ecology, social sciences & ethics (trans-disciplinary).
    • Aims for three co-equal goals
    • Scale – keep the economy within planetary boundaries.
    • Fair distribution – intra- & inter-generational equity.
    • Efficiency – satisfy human needs with minimum throughput.
    • Nicknamed “science & management of sustainability.”

Foundational Concepts in Ecology

  • Ecology – scientific study of distribution/abundance of life & interactions with environment.
    • Abiotic factors: light, water, temperature, gases, minerals, soil texture.
    • Biotic factors: producers, consumers, decomposers; embedded in food webs.
    • Sustainability (ecological) – capacity of an ecosystem to maintain processes, biodiversity & productivity indefinitely.
  • Ecosystem (Tansley, 1935) – basic functional unit: biotic community + abiotic environment, interacting through energy and nutrient flows.
  • Ecosystem structure
    • (i) Abiotic substances, (ii) Producers/autotrophs, (iii) Consumers/heterotrophs, (iv) Decomposers/transformers.

Economics Within Ecological Constraints

  • Economics (ecological perspective) – allocation of scarce natural resources to meet human needs while preserving ecological balance.
  • The economy is a sub-system of the biosphere; it obeys thermodynamic laws, needs continuous inputs of energy & materials, and generates waste.

Core Principles & Goals of Ecological Economics

  • Economy as Subsystem – embedded in Earth’s finite systems.
  • Limits to Growth – recognizes biophysical ceilings (planetary boundaries).
  • Strong Sustainability – natural capital ≠ perfectly substitutable by man-made capital.
  • Precautionary Principle – avoid irreversible damage before certainty.
  • Fair Distribution & Environmental Justice – reduce inequality; account for future generations & non-human species.

Comparing EE with Environmental & Resource Economics (ERE)

  • EE prioritises optimal scale, sustainability, physical/biological indicators, long-term, multi-disciplinary, ethical pluralism.
  • ERE focuses on optimal allocation, efficiency, monetary valuation, short-medium term, neoclassical utilitarianism.

Practical Work of Ecological Economists

  • Valuing ecosystem services & losses (monetary + biophysical).
  • Creating sustainability indicators (emergy, Ecological Footprint, material flows).
  • Linking property rights to resource management.
  • Integrated modelling of economy-environment feedbacks.
  • Analysing ecological distribution conflicts.
  • Designing precaution-based policies (e.g. "safe minimum standards").

Historical Development & Key Contributors

  • Nicholas Georgescu-Roegen – introduced \text{2nd Law} (entropy) to economics (1971).
  • Herman Daly – Steady-State Economy (1977); concept of throughput limits.
  • Kenneth Boulding – “Spaceship Earth,” material entropy.
  • Howard & Eugene Odum, Robert Costanza, AnnMari Jansson, et al. – systems ecology, energy analysis; founded Ecological Economics journal (1989).
  • Milestones – Club of Rome “Limits to Growth” (1972), Daly’s 1968 “Economics as a Life Science,” steady maturation 1970-1980s.

Ethics, Values & Justice in Ecological Economics

  • Ethics – questions of right/wrong in human–nature interactions.
  • Value Philosophies
    • Anthropocentrism – human welfare/virtue.
    • Biocentrism – moral worth of all living organisms.
    • Ecocentrism – integrity of whole ecosystems.
  • Future Generations
    • Stewardship – current generation as trustee.
    • Inter-generational justice – fair social discounting.
  • Other Species – EE grants intrinsic value; rejects purely instrumental valuation.
  • Distributive Justice – allocative fairness of environmental benefits & burdens.

Ecology, Ecosystems and Their Components

  • Energy Reception → Production → Consumption → Decomposition → Recycling – five principal ecosystem steps (Odum).
  • Producers: plants, algae, chemosynthetic bacteria (6\text{CO}2 + 6\text{H}2\text{O}\rightarrow C6H{12}O6 + 6\text{O}2).
  • Consumers: primary (herbivores) → secondary (carnivores/omnivores) → tertiary & apex predators.
  • Decomposers/Transformers: bacteria, fungi; recycle nutrients.
  • Abiotic categories: climatic/physical, inorganic nutrients, organic compounds.
  • Ecological Interactions: competition, predation, symbiosis (mutualism, commensalism, parasitism).

Energy Flow, Food Chains & Ecological Pyramids

  • 10–20 % Rule – only \approx10\text{–}20\% of energy transfers to next trophic level; \approx90\% lost as heat.
  • Pyramids – of numbers, biomass, and energy (producer base largest).
  • Food Chains vs Webs – linear vs interconnected pathways.
  • Entropy concept – shorter chains support higher biomass.

Thermodynamics, Entropy & the Economy

  • First Law – conservation of energy; economic growth needs energy inputs.
  • Second Law – entropy increases; each transformation degrades energy quality.
    • Fossil-fuel plant efficiency \approx 33\text{–}40\%.
    • Cars use only 30\text{–}40\% of fuel energy for motion.
  • Fourth Law (material entropy) – 100\% recycling impossible; motivates Circular Economy.
  • Linear vs Circular Economy diagrams illustrate entropy dissipation vs minimisation.

Classification of Natural Resources

  • Low-entropy (concentrated): fossil fuels, ores, groundwater, timber.
  • High-entropy (diffuse): solar, wind, tidal, geothermal, biomass, hydrogen.
  • Stock resources – finite; e.g. proven oil \approx1.7 \text{trn barrels}.
  • Flow resources – continuous; e.g. solar, wind; renewables generated 29\% of global electricity (2021).
  • Fund resources – self-producing yet exhaustible; e.g. fisheries (34 % over-fished), forests.

Ecosystem Functions, Services & Valuation

  • Four Function Categories (de Groot)
    1. Regulation (gas, climate, flood, nutrient cycling…)
    2. Habitat (refugium & nursery)
    3. Production (food, raw materials, genetic & medicinal resources)
    4. Information (cultural, aesthetic, spiritual, educational)
  • Four MEA Service Categories
    • Provisioning, Regulating, Supporting, Cultural.
  • Ecosystem Service Examples
    • Mangroves: storm protection, nursery for fish, timber, carbon sink.
    • Wetlands: water purification, flood mitigation, peat carbon store.

Total Economic Value (TEV) Frameworks & Valuation Methods

  • TEV = Use + Non-use values
    • Use → direct, indirect, option/quasi-option.
    • Non-use → existence, bequest, altruist/philanthropic.
  • Valuation techniques
    • Market price, hedonic pricing, travel cost, production function, cost-based (replacement, avoided, restoration), contingent valuation (CV), choice experiments (CE), group deliberative methods, benefit transfer.
    • Biophysical indices: Emergy, Exergy, Ecological Footprint, Material Flow Analysis.
  • Key equations
    • Net Present Value NPV = \sum{t=0}^{n} \frac{Bt - C_t}{(1+r)^t} for comparing management scenarios.

Case Studies & Applied Research

  • Kho Hong Hill, Thailand – CBA of protected area vs rubber plantation; intact forest provides higher social NPV via water retention \approx1.19\times10^8\,\text{THB/ha yr}, carbon, flood control.
  • Jagadishpur Ramsar, Nepal – TEV \approx94.6\,\text{million NRs yr}^{-1} (57.6 % non-use value).
  • Setiu Wetlands, Malaysia – mixed provisioning (fisheries, honey, timber), regulating (flood, erosion) & cultural (eco-tourism) services; highlighted need for integrated conservation/development.
  • Ecosystem-specific TEV diagrams provided for coral reefs, mangroves, forests, soils, water, wilderness, protected areas, elephants, surfing, Great Lakes, Arctic, etc.

Key Equations, Data & Numerical References

  • Energy transfer efficiency \approx10\% rule; pyramids show 10\,\text{J} \rightarrow 1\,\text{J} progression.
  • Global mean temperature rise since 1880: +1.1^{\circ}C.
  • Atmospheric carbon stocks diagram: land vegetation \approx560\,\text{GtC}; deep ocean \approx38{,}100\,\text{GtC}.
  • Water cycle fluxes, nitrogen & oxygen cycles illustrated.
  • Solar energy partition: 57\% absorbed/scattered, 36\% heats & evaporates, 8\% reaches plants, of which \sim15\% used in photosynthesis.

Sustainability, Conservation & Future Directions

  • Habitat destruction (deforestation) disrupts carbon/water cycles, biodiversity.
  • Conservation vs Development – integrate valuation into policy decision-making to reveal hidden ecosystem benefits.
  • Steady-State or Circular Paradigms – reduce throughput, rely on renewable energy, design for equity.
  • Research Trends – trans-disciplinary education, resilience thinking, adaptive governance, multi-criteria decision aids.
  • Guiding Question – “How can we promote a sustainable, equitable economy within ecological limits?”