Trade and Invasive Alien Species in India
Syllabus
Mains: Paper III Economy - Effects of Liberalization on the Economy Environment - Environmental Pollution and Degradation
Why it Matters?
The surge in global trade since the 1800s has led to a 20-fold rise in alien species by the early 19th century, with over 34,000 trade pairs by the 2000s, accelerating biological invasions in both terrestrial and aquatic ecosystems and causing India $127.3 billion in losses, second only to the U.S.
What You Should Know? Invasive Alien Species (IAS):
IAS are non-native organisms that, once introduced into new ecosystems, cause harm to native biodiversity, human health, and economies.
While trade tariffs may protect domestic economies, they often do not address the biosecurity risks associated with increased global trade. India, being both a major importer and exporter of exotic species, is particularly vulnerable to biological invasions.
Global trade acts as a vehicle for both deliberate and accidental introductions of IAS.
How Global Trade Fuels Biological Invasions? Deliberate Introductions:
It often happens for agriculture, aquaculture, or ornamental purposes.
Example: Gambusia and guppies were introduced in India to control mosquito populations, but now threaten native aquatic life.
Accidental Introductions:
It occurs through cargo, ballast water in ships, or even contaminated imports.
Example: The giant African snail, now widespread in India, likely arrived in colonial Calcutta through plant crates from East Africa.
Biofouling and Ballast Water:
They are significant maritime pathways. Ships carry exotic marine organisms on their hulls or in their ballast tanks.
Example: The Asian paddle crab, originally from the Northwest Pacific and East Asian waters, made its way to New Zealand, bringing along the white-spot syndrome virus.
India’s Vulnerability to IAS through Global Trade: Weak Quarantine Infrastructure at Entry Points:
Many Indian ports and airports lack adequate biosecurity systems to inspect and contain invasive alien species (IAS).
Absence of Post-Trade Ecological Assessments:
There is no institutional framework to evaluate the environmental impact of imported biological goods or species.
Fragmented Governance and Poor Coordination:
Multiple ministries operate in silos without integrated real-time tracking or response mechanisms to contain IAS spread.
Severe Underreporting of Economic Damage:
Despite over 2,000 known IAS in India, only around 3% have recorded financial impacts, leading to policy neglect and weak prioritization.
Impacts of Invasive Alien Species (IAS) in India: Agricultural Damage:
Parthenium hysterophorus, introduced through wheat imports under the U.S. PL-480 scheme (1955), now infests farmlands across India, reducing crop yields and affecting soil health.
Threat to Native Biodiversity:
Tilapia brought for aquaculture, has aggressively displaced native freshwater species in Indian rivers and lakes, threatening ecological balance.
Economic Losses:
A 2022 study estimated India’s economic loss due to invasive alien species at $127.3 billion over 60 years, making it the second-most affected country after the United States.
Ecological Degradation:
Invasive alien species often outcompete or prey on native species, leading to their decline or extinction and disrupting overall ecosystem stability and resilience.
Public Health Threats:
Invasive mosquito species like Aedes albopictus and Aedes aegypti transmit diseases such as Zika, dengue, malaria, and West Nile fever, posing serious public health risks.
Way Forward: Strengthen Port Biosecurity:
Implement real-time detection and early-warning systems along with mandatory quarantine and risk profiling of all biological imports.
Mandatory Post-trade Biological Assessments:
Ensure ecological clearance of imported goods in specialized facilities before they enter domestic markets.
Institutional Coordination Mechanisms:
Establish an integrated response through inter-ministerial collaboration involving the Ministries of Environment, Agriculture, Commerce, and Science.
Enhance Research and Public Awareness:
Increase investment in ecological studies on invasive alien species (IAS) under shifting climate-trade dynamics, coupled with awareness campaigns on the risks of exotic pet and ornamental trades.
Adopt a ‘One Biosecurity’ Approach:
Embrace a holistic strategy that integrates human, animal, plant, and ecosystem health to prevent and manage biological invasions effectively.