Key Drivers Behind Declining Agrobiodiversity: Industrial Agriculture and Globalization

Over the past century, the world has lost a staggering amount of agricultural genetic diversity. The crops, livestock breeds, and farming systems that humanity carefully developed over thousands of years are disappearing at an alarming rate. But what’s driving this decline? The answer lies in a combination of industrial agriculture, globalised food systems, policy shifts, and the relentless replacement of local crop varieties with commercial alternatives. Let’s break down the key forces behind the erosion of agrobiodiversity – and why it matters for everyone.

The acceleration of agrobiodiversity decline 🔗

Agrobiodiversity – the variety of plants, animals, and microorganisms used in food and agriculture – has been shrinking rapidly since the early 1900s. According to the FAO, roughly 75 percent of plant genetic diversity has vanished as farmers worldwide shifted from multiple local landraces to genetically uniform, high-yielding varieties. Today, just 12 plant species and 5 animal species supply about 75 percent of the world’s food. Rice, maize, and wheat alone account for nearly 60 percent of the calories humans derive from plants.

This narrowing didn’t happen overnight. It accelerated throughout the 20th century as population growth intensified demand for food, and competition for natural resources – land, water, forests – increased. Multiple pressures converged: the spread of industrial farming, the Green Revolution, globalisation of food markets, environmental degradation, overgrazing, deforestation, and shifts in agricultural policy. Each of these forces reinforces the others, creating a cycle that pushes diverse, locally adapted farming systems toward the margins.

Industrial agriculture and the Green Revolution 🔗

The single biggest driver of agrobiodiversity loss is the rapid expansion of industrial and Green Revolution agriculture. These farming systems are built on a core principle: genetic uniformity. Large areas are planted with a single high-yielding variety – or a handful of closely related cultivars – using heavy inputs like synthetic fertilisers, pesticides, and irrigation to maximise output.

Why uniformity is the goal 🔗

Industrial farming demands predictability. Uniform crops are easier to harvest mechanically, process industrially, and sell in standardised markets. As FoodPrint explains, this model treats crops and livestock like components on an assembly line rather than players in a dynamic ecosystem. The result is efficiency at the cost of diversity.

The Green Revolution, which began in the 1960s, took this logic to a global scale. High-yielding varieties (HYVs) of wheat, rice, and other staple crops were developed and distributed to farmers across Asia, Latin America, and Africa. These varieties delivered impressive short-term yield gains. But they also required specific inputs – chemical fertilisers, pesticides, controlled irrigation – and performed best in monoculture settings with minimal crop rotation.

The impact on crops, livestock, and fisheries 🔗

The consequences for genetic diversity have been severe. A 2025 analysis by the Center for Strategic and International Studies (CSIS) notes that the number of crop varieties grown on farms has dropped by more than 90 percent over the past century. Meanwhile, about half the breeds of many domestic animal species have been lost.

Intensive livestock production has similarly favoured a small number of breeds optimised for maximum output under controlled conditions. Indigenous livestock breeds – often far better suited to local environments and low-input farming – have been displaced or diluted through crossbreeding with commercial breeds. Industrial fisheries and aquaculture have followed the same pattern, replacing mixed and natural aquatic systems with mono-species production that degrades supporting ecosystems.

This trend extends to soil health as well. Industrial farming practices – heavy machinery, synthetic chemicals, monocultures – degrade soil structure and kill the microorganisms that maintain fertility. According to Inf’OGM, organic carbon levels in the upper soil layers have declined by 25 to 50 percent after decades of continuous cultivation in temperate regions, reducing the soil’s capacity to support diverse life.

Globalisation’s effect on agricultural diversity 🔗

The globalisation of food systems is another major force behind agrobiodiversity loss. As food markets became increasingly international, the pressure to produce standardised, uniform products intensified. This has reshaped what farmers grow, how they grow it, and which varieties survive.

Standardisation and market pressure 🔗

Global supply chains demand agricultural products with consistent size, shape, colour, and shelf life. Processors need potatoes with a specific starch content for french fries. Supermarkets reject fruits and vegetables with natural variations. This standardisation pressure travels down the supply chain to farmers, who find themselves abandoning diverse local varieties in favour of the few that meet rigid market specifications.

The result is a dramatic narrowing of the genetic base of global agriculture. The three crops that provide more than half of plant-derived calories worldwide – rice, wheat, and maize – illustrate this concentration. As reported in Undark, Mexican farmers now cultivate only about 20 percent of the corn types grown there in 1930. Chinese farmers produce just 10 percent of the 10,000 wheat varieties recorded in 1949.

Intellectual property and seed industry consolidation 🔗

Globalisation has also brought the extension of industrial patenting and intellectual property (IP) systems to living organisms. The FAO identifies this as a key cause of agrobiodiversity decline: IP regimes applied to seeds and plant varieties have led to the cultivation and rearing of fewer varieties and breeds, producing a more uniform but less diverse global market.

Research published in a study in the journal Agriculture and Human Values found that the dominant global intellectual property regime for germplasm has contributed to consolidation in the seed industry while constraining collaborative plant breeding processes built on the work of generations of farmers. Strong IP protections can limit farmers’ ability to save, exchange, and replant seeds – practices that have historically sustained genetic diversity.

This consolidation means that a shrinking number of large seed companies control an expanding share of the global seed market. The varieties they promote are selected for performance under industrial conditions, not for the genetic diversity or local adaptation that traditional farming systems maintained.

Marginalisation of small-scale farming 🔗

As global markets reward uniformity, small-scale and diverse food production systems are pushed to the margins. These are the very systems that have historically conserved farmers’ varieties of crops and breeds of domestic animals. When smallholder farmers shift to commercial varieties to compete in global markets – or simply to survive economically – the traditional varieties they once cultivated often disappear entirely. With them go the local knowledge and cultural practices that maintained this diversity for centuries.

The replacement of local varieties 🔗

Of all the drivers of agrobiodiversity loss, one stands out as the most direct and widespread: the replacement of local varieties with improved or exotic alternatives. The FAO’s Commission on Genetic Resources identifies this as the primary cause of genetic erosion in crops, confirmed by nearly all countries in their 1996 reports on the state of plant genetic resources.

How replacement happens 🔗

The process is straightforward. When new commercial varieties are introduced into a farming community – often through government programmes, development projects, or market incentives – farmers adopt them for their higher yields, pest resistance, or market compatibility. As they do, they stop planting the traditional varieties that may have been cultivated locally for centuries.

The problem is that this transition is usually a one-way street. Once a traditional variety falls out of cultivation, the unique genes and gene complexes it carried – developed through generations of farmer selection under local conditions – are lost. Modern commercial varieties, despite their advantages, do not contain many of these locally adapted genetic traits.

The scale of loss 🔗

The numbers are stark. More than 90 percent of crop varieties have vanished from farmers’ fields globally. In the United States, over 95 percent of the apple varieties known in 1900 are no longer grown. Thirty percent of livestock breeds worldwide face the risk of extinction, with roughly six breeds lost every month. All 17 of the world’s major fishing grounds are being fished at or above sustainable limits.

This genetic erosion doesn’t just affect farmers – it undermines the raw material that plant breeders need to develop new varieties capable of withstanding future challenges like climate change, emerging diseases, and shifting pest pressures. Without a broad genetic base to draw from, our ability to adapt agriculture to an uncertain future is severely compromised.

Other contributing factors 🔗

Beyond industrial agriculture, globalisation, and varietal replacement, several additional forces accelerate agrobiodiversity loss.

Land clearing and habitat destruction 🔗

The conversion of forests, wetlands, and grasslands into farmland eliminates habitats for wild species and wild relatives of crops that serve as important genetic reservoirs. Around half of all habitable land on Earth is already used for agriculture, and expansion continues in many regions. Loss of these wild areas also removes fallow fields and uncultivated zones where species useful to farmers – including wild food plants, pollinators, and natural pest enemies – can survive.

Population pressure and overexploitation 🔗

Growing populations increase demand for food, which in turn drives intensification and expansion of farming. The World Farmers Markets Coalition highlights that just three crops now provide more than half of global plant-derived calories, reflecting how population pressure pushes farming systems toward a few high-yielding staples at the expense of diversity. Overexploitation of fisheries, forests, and rangelands compounds the problem by degrading the ecosystems that support agrobiodiversity.

Environmental degradation and climate change 🔗

Soil degradation, water pollution, and chemical contamination from intensive farming reduce the capacity of agricultural landscapes to support diverse life. Climate change adds another layer of stress: as temperatures rise and rainfall patterns shift, traditional varieties that evolved under specific local conditions may struggle to perform. Without the genetic diversity that enables adaptation, farming systems become increasingly fragile.

Changing agricultural policies 🔗

Government policies often reinforce the trends driving agrobiodiversity loss. Subsidies that favour commodity crops, seed certification regulations that restrict the marketing of traditional varieties, and agricultural research focused overwhelmingly on yield maximisation all push farming toward uniformity. In the United States, for instance, federal agriculture policy tends to support large-scale production of corn and soybeans, reinforcing dependence on a narrow range of crops.

Why this matters 🔗

The decline of agrobiodiversity isn’t just an abstract environmental concern. It has direct implications for food security, nutrition, and the resilience of farming systems worldwide. A food supply that depends on a handful of genetically similar crops is vulnerable to catastrophic failure – a single new disease or pest could devastate production across entire regions. Diverse agricultural systems, by contrast, spread risk across many species and varieties with different strengths and tolerances.

Agrobiodiversity also underpins nutritional diversity. Diets based on just a few staple crops tend to be heavy in calories but lacking in essential vitamins, minerals, and micronutrients. Traditional food systems that draw on hundreds of crop varieties and wild food species offer far more nutritional balance.

Preserving agrobiodiversity is not about rejecting modern agriculture outright – it’s about recognising that genetic diversity is the foundation on which all future agricultural improvement depends. Without it, the options for adapting to climate change, developing disease-resistant crops, and feeding a growing population sustainably become dangerously limited.

What do you think? Can modern agricultural systems be redesigned to value diversity alongside productivity? And what role should smallholder farmers and traditional knowledge play in the effort to reverse agrobiodiversity loss?

References

1. https://www.fao.org/4/y5609e/y5609e02.htm
2. https://foodprint.org/issues/biodiversity-and-agriculture/
3. https://www.csis.org/analysis/seeding-security-why-agrobiodiversity-loss-threatens-national-security
4. https://infogm.org/en/article_journal/industrial-agriculture-kills-biodiversity/
5. https://undark.org/2017/11/30/agrobiodiversity-disappearing-agriculture-health/
6. https://pmc.ncbi.nlm.nih.gov/articles/PMC5414820/
7. https://www.fao.org/cgrfa/topics/plant-genetic-resources/en
8. https://www.worldfarmersmarketscoalition.org/agricultural-biodiversity-the-key-to-food-security-and-sustainable-farming/