Is India Underestimating the Cost of Dealing with Invasive Species?

Context

• A new global study (Nature Ecology & Evolution, 2025) based on InvaCost database highlights the massive economic impact of invasive species.

• India emerges with the highest discrepancy in management cost reporting → indicating massive “hidden” expenditure.

Key Findings of the Study

• Global Costs (1960–2022): > $2.2 trillion.

  • Plants: $926 billion.

  • Arthropods: $830 billion.

  • Mammals: $263 billion.

• Regional impact (absolute terms):

  • Europe ($1.5 trillion, 71% of global costs).

  • N. America ($226 bn), Asia ($182 bn), Africa ($127 bn), Oceania ($27 bn).

• India’s anomaly:

  • Management cost discrepancy: 1.16 billion % (highest globally).

  • Suggests under-reporting due to lack of centralised data, language/reporting gaps, and limited institutional coordination.

• Median global discrepancy: 3,241%.

Why it Matters for India

• Ecological damage: Lantana weed in Bandipur NP – reduces biodiversity, increases fire risk.

• Agriculture losses: Non-native pests damage crops → food security challenge.

• Economic drain: Hidden costs of management not reflected in budgets or planning.

• Governance gaps:

  • Fragmented inter-agency action.

  • Competing conservation priorities (e.g., tiger protection overshadows invasive species removal).

Constitutional / Policy Framework

• Convention on Biological Diversity (CBD): India obligated to prevent, control, or eradicate alien species that threaten ecosystems.

• International Maritime Organization’s Ballast Water Management Convention (2017): Prevents spread of aquatic invasives.

• National Biodiversity Act, 2002: Provides legal framework for biodiversity protection (but invasive species not explicitly prioritised).

Challenges in India

1. Poor Documentation & Reporting – fragmented databases, underestimation of costs.

2. Resource Constraints – limited funding compared to magnitude of problem.

3. Over-breadth of Invasives – not all are harmful (e.g., many crops are non-native).

4. Conflict with Globalisation – trade and movement of goods fuels invasives.

5. Management Difficulties – prevention easier than eradication; control measures expensive & long-term.

Examples of Invasive Alien Species in India

• Lantana camara – outcompetes native flora, highly combustible.

• Prosopis juliflora – damages dryland ecosystems.

• Eichhornia crassipes (Water hyacinth) – chokes water bodies, depletes oxygen.

• Parthenium hysterophorus (Congress grass) – allergenic, invasive weed.

• Apple snails, Tilapia (fish) – threaten aquatic biodiversity.

Way Forward 

1. Centralised Database: Regular documentation of invasive species management costs.

2. Targeted Action Plans: Focus on species with highest ecological & economic damage.

3. Link Management with Climate Policy: Many invasives interact with climate change (e.g., wildfire risk from lantana).

4. Community Involvement: Local communities in removal and bio-utilisation projects.

5. Independent Review Mechanism: Regular audits of management costs and outcomes.

6. Scientific Criteria for Prioritisation: Focus on species of moral turpitude in ecology (high ecological harm).

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