Climate Change’s Devastating Effects on Agriculture, Forests and Fisheries Livelihoods

Climate change is reshaping livelihoods across rural India at an alarming pace. The three primary sectors that sustain millions of families-agriculture, forestry, and fisheries-are experiencing profound disruptions. From erratic monsoons affecting crop cycles to warming oceans altering fish migration patterns, the impacts are far-reaching. For a country where these sectors employ approximately 58% of the population and contribute significantly to the national economy, understanding these changes is not just an academic exercise-it’s a matter of survival for millions.

Indian agriculture under climate threat 🔗

Agriculture in India operates under uniquely challenging conditions. About 62% of the country’s cropped area depends entirely on rainfall, making it acutely vulnerable to climate variability. This rain-fed agricultural system, while historically adaptive, now faces unprecedented stress from shifting weather patterns.

The projected yield losses paint a concerning picture. Without adaptation measures, rain-fed rice yields are projected to decline by 20% by 2050 and a staggering 47% by 2080. Even irrigated rice won’t escape the impact, though the losses are comparatively moderate at 3.5% and 5% for the same periods. Wheat, a critical winter crop, faces similar challenges. Climate models project wheat yield reductions of 19.3% by 2050 and 40% by 2080, with significant variations across regions. Maize, another staple, could see kharif season yield losses of 18% and 23% in 2050 and 2080 scenarios respectively.

How temperature and water stress affect crops 🔗

Temperature increases cause multiple problems for Indian agriculture. When temperatures exceed 35°C, wheat yields can decrease by up to 20% if adaptive strategies aren’t implemented. Rising heat accelerates crop maturation, reducing grain weight and nutritional quality. Plants lose more water through transpiration, increasing irrigation demands on already stressed water resources.

More extreme projections suggest that a 2.5 to 4.9°C temperature increase could decrease wheat yields by 41-52% and rice yields by 32-40%. These yield losses are compounded by soil degradation from years of intensive farming and increasing water stress. Additionally, elevated carbon dioxide levels are decreasing protein, iron, and zinc concentrations in crops like rice, maize, and wheat-meaning that even when harvests succeed, the food produced may be less nutritious.

The Indian monsoon, which over 65% of farmland depends upon, has become increasingly unpredictable. Shifts in monsoon timing disrupt sowing schedules and crop calendars, while changes in rainfall distribution create waterlogging in some areas and drought in others.

Forests and biodiversity at risk 🔗

India’s forests cover approximately 20% of the country’s geographical area and directly support the livelihoods of around 200 million people who depend on forest resources. Climate change threatens to fundamentally alter these ecosystems through changes in temperature, rainfall patterns, and extreme weather events.

Widespread vegetation shifts projected 🔗

Dynamic vegetation modelling suggests that 39% of India’s forest grids could undergo vegetation type changes under high-emission scenarios by the end of this century. The impacts vary dramatically by region-some states like Chhattisgarh, Karnataka, and Andhra Pradesh may see up to 73%, 67%, and 62% of their forested areas undergo significant changes respectively.

Climate change combined with land-use pressures will cause shifting distribution ranges for many forest species. The general pattern shows a possible expansion of moist broadleaf forests in central India, but a concerning shrinkage of temperate broadleaf and alpine forests. Forest type boundaries may shift along elevation and rainfall gradients, with species migrating from lower to higher elevations and drier forest types potentially transforming into moister types.

Mountain forests face heightened vulnerability 🔗

Himalayan forests face particular risks because higher elevations are experiencing greater temperature increases than lowland areas. Sub-alpine, alpine, Himalayan dry, and moist temperate forests are all susceptible to these changes. The consequences extend beyond trees-changes in vegetation composition and distribution patterns affect entire ecosystems, including wildlife that depends on specific forest types.

Recent research projects that global warming will increase the likelihood of a shift from forest to savanna-like conditions in major Indian forest regions by the late 21st century. The driving factor is increased precipitation variability under changing climate conditions. Between 2001 and 2020, India’s tree cover grids already declined from 30% to 28%.

The Western Ghats: A biodiversity hotspot under pressure 🔗

The Western Ghats, recognised as a UNESCO World Heritage Site and one of the world’s top biodiversity hotspots, face multiple converging threats. Fragmentation and deterioration of forests, biodiversity loss, soil erosion, depleting groundwater resources, and climate change are all affecting this critical ecosystem.

Increasing forest fragmentation is a major threat in the Western Ghats landscape, with consequences for both wildlife and human communities. The region supports exceptionally high species diversity, including endemic genera of fish (over 40% endemic), amphibians (over 80% endemic), and reptiles (over 65% endemic). Scientists estimate a 33% drop in Western Ghats biodiversity by 2050 due to extreme weather caused by climate change.

The northern portions of the Western Ghats face additional vulnerability due to more fragmented forest cover, making these areas more susceptible to climate change impacts, fire, and pest attacks. Analysis of satellite data from the central Western Ghats shows a 41% decline in evergreen forests and 60% fragmentation of contiguous forests between 1973 and 2018.

Fisheries facing multiple climate impacts 🔗

India’s coastline stretches 7,517 kilometres, supporting approximately 3.5 million people who derive their livelihoods from marine capture fisheries. Climate change affects these communities through multiple pathways: rising ocean temperatures, ocean acidification, sea level rise, and increasingly frequent extreme weather events.

Ocean warming and its consequences 🔗

The Indian Ocean is warming at an alarming rate, accounting for more than 30% of the heat content increase in global oceans over the past two decades. This warming affects fish distribution, productivity, and migration patterns. Fish populations in equatorial areas tend to decline with warming oceans, while those towards polar regions tend to increase, potentially causing local extinctions and reduced diversity in tropical waters.

Studies of Karnataka’s coastal fishing communities found that 94% of fishers observed climate change impacts, including shoreline erosion, cyclones, and heat waves. These changes resulted in asset losses and an average reduction of 28 fishing days annually-a significant blow to communities already operating on thin margins.

Impacts on coastal communities and livelihoods 🔗

Coastal communities face multiple pressures from sea level rise, including displacement, food security threats, infrastructure damage, and ecological loss. Rising sea levels place increasing pressure on coastal areas that historically provided recreation, storm protection, and habitat for marine life.

The impacts extend beyond just fishing. Marine fisheries are prone to climate externalities affecting fish stock sustainability and fisher livelihoods. Changes in fish species distribution, shifts in fishing grounds, loss of existing major fishery species, and fish migration all affect communities that have traditionally depended on predictable catches.

Sea level rise and flooding will multiply the challenges facing fishing communities by decreasing fish availability, changing migration patterns, and causing loss of fishing boats and equipment. Freshwater fisheries face similar pressures through saline water intrusion and changes to river ecosystems.

Interconnected vulnerabilities and livelihood impacts 🔗

Smallholder farmers, who form more than 85% of India’s farming population, operate under some of the harshest constraints. Most rely on rain-fed agriculture, lack adequate irrigation access, have limited credit or insurance, and are excluded from formal market systems. A single poor season can devastate a rural household.

For forest-dependent communities, the income from non-timber forest products faces uncertainty as climate change alters forest composition. Rising temperatures and erratic rainfall are weakening Indian forests’ ability to absorb carbon dioxide, threatening India’s climate goals while simultaneously reducing the ecosystem services these forests provide to local communities.

Extreme weather events occurred on approximately 90% of days from January to September in recent years, affecting 3.2 million hectares of cropped land and killing nearly 10,000 livestock in 2024 alone. These events don’t just destroy crops-they damage infrastructure, displace communities, and set back development gains.

Adaptation efforts and the path forward 🔗

The Government of India has implemented several initiatives to address these challenges. The National Mission for Sustainable Agriculture (NMSA) aims to make Indian agriculture more resilient to changing climate, while the Indian Council of Agricultural Research’s National Innovations in Climate Resilient Agriculture (NICRA) project focuses on developing and promoting climate-resilient technologies.

Since 2014, 1,888 climate-resilient crop varieties have been developed alongside 68 location-specific climate-resilient technologies for wider adoption among farming communities. Adaptation strategies for agriculture include crop diversification, heat-tolerant varieties, improved water management, and adjustments to sowing times.

Research shows that farmers have been able to adapt to temperature changes for rice and maize, though not for wheat. However, these adaptations vary significantly across regions and crops, with farmers in higher productive regions with better irrigation showing smaller gaps between short-term and long-term climate impacts.

For fisheries, adaptation strategies emphasise mangrove conservation, saving money, changing fishing locations, and leveraging indigenous knowledge. Capacity-building and livelihood diversification have emerged as key priorities for building resilience in coastal communities.

What do you think? How can rural communities balance immediate livelihood needs with the long-term necessity of adapting to climate change? What role should traditional ecological knowledge play in developing climate-resilient agricultural and fishing practices?

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