Kerala’s Ecosystem Red List Assessment: Collapse Risk and Landscape Conservation

What Kerala has initiated

The Kerala State Biodiversity Board is funding the project, which is being jointly executed by the Kerala Forest Research Institute and the Centre for Ecology, Taxonomy, Conservation and Climate Change at MES Asmabi College. Its coverage extends from high-altitude habitats through densely populated midlands to vulnerable coastal stretches.

The intended outputs are an official Risk Register, an Ecosystem Typology Atlas and ecorestoration priority maps. These are planned for integration into State planning portals and use by Biodiversity Management Committees and panchayats. They are proposed outputs, not completed findings.

• The source identifies this as the first ecosystem Red List assessment initiative by an Indian State.
• The assessment seeks a standardised baseline of historical habitat loss, fragmentation and hydrological disruption.
• Species-level assessment is also being pursued, indicating that ecosystem and species conservation are complementary.

How ecosystem collapse risk is assessed

The IUCN Red List of Ecosystems evaluates whether an ecosystem is approaching a state in which its defining characteristics and ecological functioning are lost. Collapse does not necessarily mean that all vegetation or every organism disappears; the area may persist physically while no longer sustaining the original ecosystem.

The framework examines changes in geographical distribution, environmental conditions and ecological processes. Where adequate evidence is available, quantitative modelling can also estimate collapse risk. A credible assessment therefore requires clearly defined ecosystem types, spatial boundaries, reference conditions and indicators of degradation.

• Criterion A examines reduction in geographical distribution.
• Criterion B examines restricted geographical distribution in conjunction with evidence of decline or threats.
• Criterion C examines degradation of the abiotic environment, such as altered water regimes.
• Criterion D examines disruption of biotic processes or interactions, such as regeneration and food-web relationships.
• Criterion E uses quantitative analysis to estimate the probability of ecosystem collapse.

Why Kerala needs a landscape-scale approach

The source reports an 83% loss of tropical riparian evergreen forests in the southern Western Ghats over the past century, associated with dam construction, invasive plantations and escalating climate extremes. It describes these forests as Critically Endangered under IUCN criteria and reports potential collapse within the next 20–40 years. These claims concern the specified forest ecosystem, not all forests or ecosystems in Kerala.

Myristica swamps, shola-grassland mosaics and mangroves illustrate why conservation cannot rely on species counts or tree cover alone. Swamps depend on appropriate hydrology, shola-grassland systems comprise distinct but connected habitats, and mangroves depend on coastal and tidal processes.

A river basin may retain patches of vegetation while experiencing disrupted flows and ecological connectivity. The source identifies gaps in internationally standardised ecosystem classification and formal collapse-risk assessment in landscapes such as the Periyar river basin.

• Habitat extent and ecological condition must be assessed together.
• Restoration should recover native ecosystem characteristics rather than merely increase plantation cover.
• Threats and ecological processes often cross administrative and protected-area boundaries.

From risk maps to development and climate planning

Spatially explicit risk assessments can help identify where habitat conversion should be avoided, where ecological connections need repair and where restoration could strengthen natural buffers against floods and landslides. The source envisages Biodiversity Management Committees and panchayats using this information for locally appropriate climate adaptation.

The planning value lies in combining ecosystem type, risk level, degradation drivers and restoration potential. Risk categories alone cannot prescribe every intervention: a hydrologically degraded swamp requires a different response from a fragmented mountain habitat or a threatened coastal mangrove.

• Use ecosystem maps as an input to land-use planning and environmental appraisal.
• Prioritise restoration according to ecological needs, feasibility and community dependence.
• Coordinate action across river basins and connected landscapes rather than treating each site in isolation.
• Use ecosystem-based adaptation alongside, not as a substitute for, sound disaster-risk governance.

Legal and institutional significance

Article 48A directs the State to endeavour to protect and improve the environment and safeguard forests and wildlife. Article 51A(g) places a corresponding environmental duty on citizens. State Biodiversity Boards and local Biodiversity Management Committees form part of the institutional architecture under the Biological Diversity Act.

An ecosystem risk classification is a scientific assessment, not an automatic statutory prohibition on development. Its practical effect depends on how competent authorities incorporate the findings into applicable planning, environmental appraisal, conservation and restoration decisions. It should inform, rather than replace, legally required procedures.

• Scientific risk status and legal protection are distinct.
• Local participation can connect technical maps with knowledge of habitat change and resource dependence.
• Transparent methods and periodic reassessment are necessary to make the baseline useful beyond the project period.