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The Silent Collapse Beneath Our Feet: India’s Earthworm Crisis

Earthworms – nature’s unseen soil engineers – are vanishing across India. Their decline signals a deeper ecological breakdown, with far-reaching conseque-nces for agriculture, climate resilience, and national food security

Lakshmi Narayanan

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Image: Sippakorn-yamkasikorn/ Pexels

Earthworms are among the most critical yet overlooked “soil engineers” of terrestrial ecosystems. Despite their foundational role, the systematic neglect of soil biodiversity in agricultural policy represents a serious strategic blind spot. Across India, an invisible crisis is unfolding as earthworm populations decline sharply in both agricultural and natural landscapes. This is not merely a biodiversity concern—it is a direct threat to the country’s soil capital and long-term food security.

As foundational organisms, earthworms provide the biological infrastructure necessary for ecological balance. Their disappearance reflects a deeper structural failure in land management systems and calls for a closer examination of their biological and ecological functions.

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Image: Leni/ Pexels

The Foundational Role: How Earthworms Sustain Productivity

In modern agronomy, healthy earthworm populations are a prerequisite for sustainable productivity. These organisms create a living soil architecture that no mechanical intervention can replicate. By processing organic matter, they act as a bridge between decomposing waste and plant-available nutrients, ensuring both chemical fertility and physical stability.

“The decline in earthworm populations reflects a deeper crisis in human–environment interactions,” says Sreelakshmy.M, Assistant Professor, Geography, Nirmala College, Coimbatore, Tamil Nadu. “From a geographical perspective, this issue is not merely biological but spatial and systemic, rooted in the transformation of land, climate, and soil regimes.”

The intensification of agriculture since the Agricultural Revolution has fundamentally altered soil ecosystems. While synthetic fertilizers and pesticides have boosted yields in the short term, they have imposed significant ecological costs. Earthworms, particularly those inhabiting the topsoil, are directly exposed to these chemical inputs. Their decline signals a broader degradation of soil health, as they are key agents of aeration, nutrient cycling, and organic matter decomposition.

When topsoil biodiversity diminishes, the long-term fertility and structural integrity of agricultural landscapes are compromised.

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Equally significant is the rapid transformation of land-use patterns. Urban expansion, infrastructure development, and the spread of impermeable surfaces have led to soil sealing and habitat fragmentation. From a spatial perspective, the conversion of biologically active land into built environments represents a permanent loss of ecological function. Earthworms cannot survive beneath concrete, and with their disappearance, essential soil processes are disrupted.

Core Contributions to Soil Vitality

Earthworms play a central role in maintaining soil health. Their burrowing creates complex underground networks that improve soil structure, enhance aeration, and enable deeper root penetration. These tunnels also stimulate microbial activity, strengthening the soil’s biological ecosystem.

By digesting organic matter, earthworms convert decomposing residues into nutrient-rich castings. These natural fertilizers contain concentrated levels of nitrogen, phosphorus, and potassium—essential elements for plant growth. Through this continuous recycling process, they sustain the nutrient base of agricultural systems.

In addition, earthworms bind soil particles into stable aggregates, improving water infiltration and moisture retention. This reduces surface runoff, protects against erosion, and enhances resilience to extreme weather conditions.

Together, these processes form the backbone of agricultural stability. Yet, modern human-driven pressures are rapidly eroding this biological foundation.

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“Rising global temperatures increase soil heat and accelerate moisture evaporation,” Sreelakshmi explains. “Earthworms depend on a delicate balance of temperature and moisture. When soils dry or overheat, survival becomes difficult, often leading to localized mass mortality.”

This decline illustrates the interconnected nature of environmental stressors—chemical intensification, land-use change, and climate shifts—operating simultaneously across scales.

Analyzing the Drivers of Decline: A Multi-Front Threat

The shift from traditional Indian farming—once characterised by organic inputs, mixed cropping, and minimal disturbance—to intensive industrial agriculture has created increasingly hostile conditions for soil life. The decline of earthworms is driven by multiple, overlapping pressures:

Chemical Toxicity: The extensive use of urea-based fertilizers, pesticides, and fungicides introduces toxic compounds into the soil. Many of these act as neurotoxins, impairing earthworms’ nervous systems and reducing their reproductive capacity.

Nutritional Depletion: Practices such as stubble burning and the removal of crop residues deprive soil organisms of organic matter, their primary food source.

Mechanical Disturbance: Frequent tillage and heavy machinery disrupt soil structure, destroy burrow networks, and cause compaction, limiting oxygen availability.

Habitat Erosion: Deforestation and poor land management accelerate topsoil loss, eliminating the primary habitat where earthworms thrive.

Climate Stress: Rising temperatures, erratic rainfall, droughts, and flooding create unstable and often lethal conditions for moisture-sensitive organisms.

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Image: Edris-Ibraheem/ Pexels

According to Dr. C P Maruthamalai, Assistant Professor, Geology,
Madurai Kamaraj University, the intensive use of chemical inputs significantly disrupts soil ecosystems. Excess nitrogen alters soil chemistry, creating conditions hostile to beneficial organisms. Prolonged exposure reduces earthworm mobility, feeding ability, and reproduction, gradually weakening entire populations.

These stressors are no longer isolated—they form a systemic crisis that is reshaping agricultural landscapes.

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The Domino Effect: Systemic Consequences of Decline

The disappearance of earthworms triggers a cascading “domino effect” across ecological and economic systems, transforming agriculture from a self-sustaining biological model into a fragile, input-dependent system.

Declining Natural Fertility: Reduced decomposition slows nutrient cycling, forcing farmers to rely increasingly on synthetic fertilizers, often leading to rising input costs.

Weakened Soil Structure: Compacted soil restricts root growth and reduces water efficiency, making crops more vulnerable to stress.

Water Instability: Lower infiltration rates increase runoff, contributing to both drought conditions and soil erosion.

Food Security Risks: As soil productivity declines, crop yields become less stable, threatening long-term food systems.

Biodiversity Collapse: Earthworms are central to the soil food web; their disappearance disrupts microorganisms and higher organisms alike, leading to broader ecological breakdown.

This systemic decline underscores the fragility of current agricultural practices.

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Image: Hanielyaks/ Pexels

Rebuilding Soil Health

Addressing this crisis requires a fundamental shift in agricultural thinking—from short-term chemical dependency to long-term ecological restoration. Earthworms must be recognised as key indicators of soil health.

Strategic priorities include:

1. Transitioning to organic and natural farming systems

2. Restoring soil organic matter through compost, green manure, and vermicompost

3. Adopting conservation agriculture and reducing tillage

4. Eliminating stubble burning and promoting residue retention

5. Integrating soil biodiversity into agricultural policy and extension services

Such measures are essential not only for restoring earthworm populations but also for rebuilding resilient farming systems.

An Imperative for the Future

The decline of earthworms is a warning signal of a deeper ecological imbalance within India’s landscapes. Protecting these silent engineers is not simply an environmental concern—it is central to economic stability, agricultural sustainability, and national food security.

A resilient future depends on restoring the biological life of our soils.

Because the future of farming does not begin in laboratories or markets—it begins beneath our feet.

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Earth

252 Million Hectares Under Restoration Across 149 Countries, but UN Warns of 2030 Target Gap

A UN report finds that 252 million hectares across 149 countries are under ecosystem restoration. However, increased investment and accelerated action are needed to meet global restoration targets by 2030.

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River flowing through a forested mountain landscape with evergreen trees and snow-covered peaks.
Healthy mountain forests and river ecosystems play an important role in maintaining biodiversity and ecological balance.Image credit:Pexels

Global efforts to restore degraded ecosystems have reached 252 million hectares across 149 countries, generating more than one million green jobs. However, a new United Nations assessment warns that restoration efforts remain insufficient to meet international biodiversity targets by 2030, calling for a more than fourfold increase in annual investment.

The findings are presented in the Restoration Progress Report: Nature’s Comeback – Scaling Ecosystem Restoration for People and Planet, released on October 29, 2026, by the United Nations Environment Programme (UNEP), the Food and Agriculture Organization (FAO) and the Secretariat of the Convention on Biological Diversity (CBD).

The report provides the first comprehensive global assessment of progress towards commitments to restore approximately one billion hectares of degraded ecosystems. These commitments are linked to the UN Decade on Ecosystem Restoration (2021–2030) and the Kunming-Montreal Global Biodiversity Framework, which calls for at least 30 per cent of degraded terrestrial, freshwater, marine and coastal ecosystems to be under effective restoration by 2030.

According to the assessment, the 252 million hectares currently documented under restoration represent the largest recorded global restoration effort. However, this accounts for only 34 per cent of the indicative global benchmark associated with the 2030 target.

Freshwater and marine ecosystems lag behind

The report identifies considerable differences in restoration progress across regions and ecosystem types. Asia accounts for the largest share of documented restoration, with 192.2 million hectares, followed by Africa with 36.3 million hectares and Europe with 9.1 million hectares. North and Central America account for 5.8 million hectares, South America 5.4 million hectares and Oceania 3.2 million hectares.

However, the report cautions that these figures should not be interpreted as a ranking of restoration performance, as they also reflect differences in regional land area and monitoring and reporting capacities.

Restoration of terrestrial ecosystems has reached nearly half of the global 2030 target. China reports the largest terrestrial restoration area, with 127.4 million hectares, while substantial restoration activities have also been documented in Mongolia and Kazakhstan.

Progress remains considerably slower in freshwater, marine and coastal ecosystems, despite these environments experiencing rapid degradation.

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A river along the side of a dense forest. Image credit: Pexels

The assessment documents 11 million hectares of freshwater ecosystems under restoration across 62 countries and 5.7 million hectares of marine and coastal ecosystems across 46 countries. The report also notes that limited monitoring and reporting may mean that actual restoration activities in these ecosystems are higher than the documented figures.

Meanwhile, the share of countries reporting implemented wetland restoration or rehabilitation programmes has increased from 8 per cent in 2022 to 54 per cent.

Restoration financing needs to increase fourfold

Insufficient investment remains a major obstacle to achieving global restoration commitments. The report estimates that annual restoration financing must increase from US$64 billion to US$296 billion by 2030, representing more than a fourfold rise.

Agroforestry requires the largest estimated annual investment, at US$87 billion, followed by restorative reforestation at US$52 billion, peatland restoration at US$44 billion and seagrass restoration at US$28 billion.

The report identifies employment generation as another potential benefit of scaling up restoration. While more than one million green jobs have already been associated with restoration initiatives, increased global investment could generate up to 32 million additional jobs by 2030.

It also highlights the potential contribution of ecosystem restoration to climate mitigation and biodiversity protection. Research cited in the assessment indicates that restoring just 15 per cent of global priority areas could capture and store 30 per cent of carbon dioxide-equivalent emissions released since the Industrial Revolution and help prevent 60 per cent of projected species extinctions.

The report further identifies the participation and leadership of Indigenous Peoples and local communities as essential to ensuring long-term restoration outcomes. Secure land rights, stronger monitoring systems and sustained political commitment are among the priorities identified.

With five years remaining in the UN Decade on Ecosystem Restoration, the assessment calls on governments to move beyond isolated restoration projects towards coordinated, long-term programmes that address the underlying causes of ecosystem degradation.

It emphasises that the 2030 targets should serve as a milestone in the restoration process rather than its conclusion, as ecological recovery requires sustained action and investment beyond the end of the decade.

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Kashmir’s Traditional Rice Varieties Hold Genetic Clues to Climate Resilience

A new study by SKUAST-Kashmir researchers identifies cold-tolerance genes in traditional rice varieties, highlighting their potential for climate-resilient crop breeding.

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Farmers transplanting young rice seedlings in a flooded paddy field.
Traditional rice cultivation highlights the agricultural heritage that researchers are working to preserve as they investigate genetic resources for climate-resilient crops.Imagecredit:Pexels

For generations, farmers in Kashmir have cultivated traditional varieties of rice adapted to the region’s distinctive growing conditions. A new genomic study has found that these varieties retain genetic characteristics associated with cold tolerance and local adaptation, potentially offering valuable resources for developing climate-resilient crops.

Researchers at the Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir (SKUAST-Kashmir), Srinagar, analysed 142 rice germplasm samples to examine the genetic diversity and evolutionary history of rice cultivated in the region. Published in The Plant Genome in 2026, the study identified genetic signatures in traditional varieties that could help researchers develop rice better suited to environmental stress.

The findings are significant as climate change alters growing conditions and increases uncertainty for agricultural production. Preserving traditional crop varieties could give plant breeders access to genetic traits that may have become less common in modern cultivars.

Genes linked to cold tolerance

The study, titled Re-sequencing 142 rice genomes reveals the fine-scale population structure and phylogenetic affinities of landraces of Kashmir Valley: Evidence from domestication and adaptive signatures, used genomic analysis to investigate relationships among traditional landraces, modern varieties and other rice genetic resources.

The researchers found that Kashmir’s traditional varieties carried genetic signatures associated with temperate japonica rice, while many modern varieties showed stronger associations with indica lineages from subtropical India. This distinction points to differences in their genetic histories and adaptation to local growing environments.

Among the important findings was the identification of favourable variants of CTB4a and HAN1, two genes associated with cold tolerance in rice. The researchers also examined genetic variation linked to grain quality, plant development and other agricultural traits.

Traditional varieties, including Mushq Budji, Kamad, Kaw Kreer, Nun Beoul and Zag, displayed distinctive genetic patterns. Their diversity could provide useful material for future crop-improvement programmes.

The findings do not establish that all these varieties are more resilient than modern cultivars under every environmental condition. Instead, they identify genetic resources that warrant further investigation through breeding programmes and field trials.

Earlier research explains the significance

Previous research provides a scientific basis for investigating the cold-tolerance genes identified in Kashmir’s traditional rice varieties.

A 2017 study published in Nature Communications examined CTB4a, a gene associated with cold tolerance during the booting stage of rice development, when reproductive structures form. The researchers found that a favourable variant improved cold tolerance and helped maintain pollen fertility and seed setting under low-temperature conditions.

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Crops in a paddy field.Image credit:Pexels

Similarly, a 2019 study published in the Proceedings of the National Academy of Sciences investigated HAN1 and found that natural genetic variation in the gene contributes to chilling tolerance in temperate japonica rice. The findings helped explain how rice adapted to cooler climates.

These studies strengthen the case for investigating CTB4a and HAN1 variants in Kashmir’s rice germplasm. However, the presence of promising genetic variants does not automatically guarantee improved performance in farmers’ fields. Their effects can depend on the crop’s broader genetic background, the timing and intensity of temperature stress, and other environmental conditions.

Conserving agricultural diversity

The Kashmir study also offers insights into the region’s agricultural history. Its genetic analysis suggests links between traditional Kashmir rice varieties and temperate rice lineages associated with Northeast Asia. The researchers propose that these lineages reached the region after approximately 1500 BCE, although this historical reconstruction remains an interpretation of genetic and archaeological evidence.

Beyond their historical significance, traditional rice varieties may preserve traits useful for future agricultural challenges. Modern breeding programmes often prioritise yield and other selected characteristics, but genetic diversity within traditional varieties can provide additional options for addressing environmental stress and maintaining grain quality.

The findings underline the importance of conserving traditional rice germplasm in gene banks and supporting its continued cultivation where feasible. Such conservation helps prevent potentially valuable genetic material from disappearing as farming systems and crop preferences change.

As climate change places increasing pressure on agricultural systems, Kashmir’s traditional rice varieties offer researchers a valuable starting point for investigating crop adaptation. Their genetic diversity connects generations of farming knowledge with modern genomic research, potentially helping plant breeders develop rice varieties suited to changing environmental conditions while preserving the region’s agricultural heritage.

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India’s Green Cover Declined by 5.6 Percentage Points in 25 Years as Summer Heat Intensified: Study

A new study links India’s declining green cover to rising summer temperatures, highlighting the importance of vegetation conservation for climate adaptation.

Jishnu P

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Lush green vegetation and tall trees cover rolling hills in a misty landscape.
Vegetation helps regulate local temperatures through shade and evapotranspiration, highlighting the role of green cover in climate adaptation. Image credit:Unsplash

India’s green cover declined from approximately 36.95 per cent in 2001 to 31.35 per cent in 2025, while non-green surfaces expanded across the country, according to a new study by Climate Trends. The analysis found that non-green landscapes consistently recorded higher summer temperatures than vegetated areas, highlighting the role of green cover in moderating local heat.

The study, Assessment of Green Cover Dynamics and Their Influence on Summer Temperature across India Using MODIS Land Cover and ERA5 Reanalysis Data, found that the average summer temperature difference between green and non-green landscapes ranged from approximately 1°C to 2.5°C. Areas experiencing green-cover loss recorded a mean summer temperature increase of 0.26°C.

The findings suggest that vegetation loss can contribute to local warming, although the study also identifies broader regional climate change as a factor influencing temperature trends. Protecting and restoring vegetation could help reduce local thermal stress, but it cannot independently offset the effects of global warming.

“Vegetation is not merely an ecological asset; it is an important component of India’s climate-adaptation infrastructure,” said Dr Palak Balyan, Research Lead at Climate Trends.

The study comes amid growing concerns over extreme heat and its implications for public health, livelihoods and infrastructure. The India Meteorological Department reported that 2024 was the country’s warmest year since records began in 1901, with the annual mean temperature 0.65°C above the 1991–2020 average.

Vegetation Loss and the Local Heat Effect

The Climate Trends analysis used land-cover information from the Moderate Resolution Imaging Spectroradiometer (MODIS) and ERA5-Land temperature data to assess changes between 2001 and 2025. It examined summer conditions during March, April and May to understand how land-cover transitions corresponded with temperature patterns.

Vegetation helps regulate surface temperatures through shading and evapotranspiration, the process by which plants release water vapour into the atmosphere. Trees reduce the amount of solar radiation reaching the ground, while vegetation and soil moisture influence how energy is absorbed and released. When green landscapes are replaced by built-up areas, exposed ground or sparsely vegetated surfaces, these cooling mechanisms may weaken.

Dr Balyan said the persistent temperature difference between green and non-green landscapes demonstrated the importance of vegetation in regulating local thermal conditions.

“Protecting existing natural vegetation should therefore be treated as an adaptation priority, particularly in regions experiencing simultaneous green-cover loss and rising summer temperatures,” she said.

The findings are consistent with the Intergovernmental Panel on Climate Change’s assessment of nature-based cooling measures, which identifies urban trees, vegetation and green infrastructure as potential ways to reduce heat exposure. However, the extent of cooling depends on local climate, vegetation type, water availability and the surrounding built environment.

Regional Differences Require Targeted Action

The study found that green-cover loss was concentrated in parts of western India, the Indo-Gangetic Plain, central India and the peninsula. Localised gains were identified in portions of the northeastern states, the Himalayan foothills and scattered areas of southern and eastern India.

Temperature changes also varied geographically. Warming was particularly evident across northwestern and northern India, while localised cooling occurred in parts of central and southern India. These variations indicate that national averages can obscure differences in local land-use patterns and climate conditions.

The findings have implications for urban planning, particularly in rapidly expanding cities where construction can replace trees, open spaces and other vegetated landscapes. Protecting mature trees, retaining existing green spaces and integrating vegetation into streets and public areas could help reduce heat exposure, particularly in vulnerable neighbourhoods.

However, restoration must be planned around local ecological conditions. Newly planted trees cannot immediately provide the shade offered by mature canopies, and their survival depends on suitable species, soil conditions, water availability and long-term maintenance. Protecting established vegetation is therefore an important complement to new planting initiatives.

Green Cover Cannot Replace Broader Climate Action

The study emphasises that land-cover changes are not the only drivers of summer temperatures. Both green and non-green landscapes experienced warming during the study period, indicating the continuing influence of broader climatic conditions.

Dr S K Dhaka, Professor of Atmospheric Physics at the University of Delhi, cautioned against treating vegetation restoration as a standalone solution.

“Vegetation restoration can reduce local thermal stress, but it should not be viewed as a substitute for broader climate action,” he said.

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Temporal variation in green and non-green land cover across India

He added that warming observed even in areas that remained continuously green showed that large-scale climatic forces continued to influence regional temperatures.

“India therefore needs a dual strategy: prevent further loss of established vegetation while implementing scientifically targeted restoration in heat-vulnerable regions, alongside stronger action on water management, urban planning and greenhouse-gas emissions,” Dr Dhaka said.

The distinction is important because increasing vegetation alone cannot eliminate heat risks associated with rising background temperatures. Effective adaptation requires combining nature-based measures with emissions reduction, appropriate urban design and improved water management.

Aarti Khosla, Founder-Director of Climate Trends, said the study highlighted the practical consequences of losing vegetation.

“The study puts a number on something we’ve long argued, that vegetation is not a biodiversity afterthought, but a climate-adaptation infrastructure,” she said.

“Where green cover has disappeared, temperatures have risen with it, and that is a cost India’s communities are already paying for,” Khosla added.

She also pointed to international biodiversity commitments, including the target of restoring 30 per cent of degraded ecosystems by 2030, arguing that the gap between commitments and implementation has consequences for climate resilience.

The study recommends protecting existing vegetation, preventing avoidable green-cover loss and promoting ecological restoration as part of sustainable land management.

Its central message is that green cover should be considered more than an environmental amenity. While vegetation cannot prevent all forms of warming, conserving it can help moderate local temperatures and reduce thermal stress. As India faces increasing heat risks, integrating vegetation protection into climate adaptation and development planning could help build more resilient communities.

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