Ecosystemic Approach

What is an ecosystemic approach in environmental policy?

The ecosystemic approach is a method of environmental governance that centers policy-making on the scientific understanding of ecosystem dynamics. Rather than focusing on individual species, this paradigm views the environment as a complex, functional unit where living organisms and their physical surroundings are fundamentally interdependent.¹

By prioritizing the health of the entire system, this approach seeks to ensure that no component is depleted beyond renewable levels, as the degradation of one element can negatively impact the whole. It is often contrasted with the “species-by-species” approach, which critics argue is too narrow because it may neglect broader environmental threats—such as the state of the oceans—that affect multiple species simultaneously.¹

Reinvigorated by the 1992 Convention on Biological Diversity, the ecosystemic approach recognizes humans as integral components of these systems, making it a key framework for achieving sustainable development.¹

Can you provide examples of successful implementation of ecosystemic approaches in environmental policy?

The implementation of an ecosystemic approach shifts the focus from protecting individual species to managing entire functional units, ensuring that ecological processes remain stable and productive. Several key examples illustrate how this framework is applied in modern environmental policy:¹

Marine Protected Areas (MPAs)

MPAs are perhaps the most prominent application of the ecosystemic approach. By designating specific parcels of ocean as protected zones, governments restrict destructive activities like commercial fishing, mining, and intensive aquaculture. These areas serve as “safe zones” that stabilize the structure of the broader marine ecosystem, allowing fish populations to recover and biodiversity to flourish. Notable examples include:³

• The Ross Sea Region: An MPA in the Southern Ocean spanning over 2,000,000 square km.³
• Papahānaumokuākea Marine National Monument: A vast protected area in the central Pacific Ocean that supports complex marine life.³

Watershed and Wetland Restoration

Policy-makers increasingly recognize that wetlands and forests act as natural infrastructure that collects, filters, and stores water. Rather than relying solely on engineered solutions for water scarcity, an ecosystemic approach prioritizes the restoration of these natural areas to maintain essential ecosystem services, such as flood protection and nutrient recycling.⁴

Landscape-Level Land-Use Planning

Effective conservation often requires managing large, contiguous areas of land to maintain indigenous biota. Research suggests that maintaining a matrix where more than 50 percent of the land remains undisturbed is the most effective way to preserve biodiversity. While rare, this type of integrated land-use planning ensures that energy flows through living systems remain stable, providing sustainable support for both nature and human populations.⁵

What are the challenges in adopting an ecosystemic approach to environmental policy?

Adopting an ecosystemic approach to environmental policy presents significant challenges, primarily due to the complexity of natural systems and the limitations of current scientific and economic tools. Key challenges include:

• Scientific Complexity and Uncertainty: Ecosystems are dynamic, functional units with numerous variables that are difficult to quantify with the precision found in other sciences. Predicting the outcomes of ecological disturbances is particularly difficult because of the vast, often unknown, interactions between species and the unpredictable nature of timing, location, and intensity of these events.¹⁶⁷
• Compounding Disturbances: The interaction of multiple stressors, such as climate change combined with natural disturbances, can lead to “alternative states” where ecosystems collapse or form novel, unpredictable dynamics, complicating management and restoration efforts.⁷
• Economic and Valuation Hurdles: Many ecosystem services are not traded in markets, leading to their underpricing and depletion. While economic valuation methods exist, they are often difficult to apply at large scales, and there is ongoing debate regarding the accuracy and ethics of quantifying nature in monetary terms.⁸
• Governance and Collective Action: Because ecosystems often cross territorial boundaries, managing them requires overcoming the “tragedy of the commons,” where individual incentives to exploit resources conflict with the long-term health of the collective system.⁹¹⁰
• Integration Gaps: Despite progress, the systematic integration of ecosystemic data into public and private decision-making remains largely at a “proof-of-concept” stage, and many policies still rely on narrower, species-specific management regimes.⁹⁸

How does the ecosystemic approach consider the interconnectedness of natural systems?

The ecosystemic approach considers the interconnectedness of natural systems by viewing the environment as a functional unit where living organisms—including plants, animals, fungi, and microorganisms—interact with one another and their physical surroundings. This paradigm emphasizes that every species fulfills a specific function and depends on these interactions for survival.¹

Because of this fundamental interdependence, the degradation or loss of a single component can modify the entire system, potentially damaging other species or processes. This interconnectedness is clearly demonstrated by trophic cascades, where the addition or removal of top predators triggers reciprocal changes throughout a food chain, affecting everything from herbivore populations to primary producers and nutrient cycling.¹¹²

Consequently, the ecosystemic approach advocates for comprehensive policies that protect the ecosystem as a whole rather than focusing on individual species, ensuring that no component is overexploited. This holistic view also recognizes that species-rich communities are more resilient, as their intricate webs of interaction allow them to recover more effectively from disturbances.¹¹³