Five Distinctive Features of Agrobiodiversity That Set It Apart from General Biodiversity

Agrobiodiversity – the diversity of plants, animals, and microorganisms used in agriculture – might sound like just another subset of biodiversity. But it is fundamentally different. Shaped over thousands of years by farmers, herders, and fishers, agrobiodiversity carries distinctive features that separate it from the biodiversity found in wild ecosystems. Understanding these differences is essential for anyone working in sustainability, food security, or natural resource management. Let’s break down the five key features that make agrobiodiversity unique.

Human intervention and management 🔗

The most striking difference between agrobiodiversity and general biodiversity is the role of people. General biodiversity evolves through natural selection – species adapt to their environments over millennia without deliberate human guidance. Agrobiodiversity, on the other hand, is actively managed by farmers through selective breeding, crop selection, and controlled cultivation.

According to the FAO, agrobiodiversity is actively managed by male and female farmers, and many of its components would simply not survive without this human interference. Think of modern maize (corn). It evolved from a wild grass called teosinte through thousands of years of deliberate selection. Today, the kernels of a corn cob remain tightly attached – the plant cannot effectively disperse its own seeds without a farmer’s help. Without continued human cultivation, modern maize would struggle to reproduce in the wild.

This pattern holds true across numerous crops and livestock breeds. Many high-yielding rice varieties, domestic cattle breeds, and horticultural plants depend on human care for propagation, pest control, and habitat maintenance. The relationship is symbiotic: farmers shape agrobiodiversity, and agrobiodiversity sustains farmers’ food systems.

Why this matters for sustainability 🔗

Because agrobiodiversity depends on human management, its conservation cannot be left to nature alone. If farming communities abandon traditional crop varieties or livestock breeds in favour of a few high-yielding alternatives, that diversity can disappear permanently. The FAO’s training manual on agrobiodiversity notes that local knowledge and culture are integral parts of this management – when cultural practices are lost, the biological diversity tied to them often vanishes too.

International interdependence 🔗

Here is a fact that surprises many people: most countries grow and eat food crops whose genetic origins lie outside their borders. Wheat originated in the Fertile Crescent, potatoes in the Andes, and rice in East and Southeast Asia – yet these crops now feed billions of people on every continent. This creates a deep web of international interdependence for the genetic resources that underpin global food systems.

A comprehensive study supported by the International Treaty on Plant Genetic Resources for Food and Agriculture confirmed that virtually all countries depend significantly on crop genetic diversity originating elsewhere. The research examined over 150 countries and found that this interdependence has actually increased over the past 50 years as diets and agricultural systems have globalised.

Real-world examples of interdependence 🔗

Consider Africa, where Friesian cattle – a breed originating in the Netherlands – are widely used in dairy production. Or look at horticultural systems worldwide that rely heavily on plant species introduced from distant regions. As the Union of Concerned Scientists has noted, crop genetic diversity concentrated in specific regions of the world benefits people everywhere, and the trend toward increasing dependence on foreign genetic resources is accelerating as producers adapt to changing environmental conditions.

This interdependence is the reason international agreements like the International Plant Treaty exist. The treaty covers 64 of the world’s most important food crops – collectively accounting for roughly 80% of humanity’s food supply – and facilitates the exchange of their genetic material across borders. Without such cooperation, no country could maintain the genetic diversity it needs for climate adaptation and food security on its own.

Focus on genetic and species diversity 🔗

When people talk about general biodiversity, they usually focus on species diversity – how many different species exist in a given ecosystem. Agrobiodiversity, however, operates on two critical levels: species diversity and genetic diversity within species.

This distinction is crucial. Within a single crop species like rice, there can be tens of thousands of distinct varieties (also called landraces or cultivars), each with different traits – drought tolerance, pest resistance, nutritional content, flavour, or growing season length. The same applies to livestock, where hundreds of breeds of cattle, sheep, goats, and poultry have been developed for different environments and purposes.

Why genetic diversity within species is so important 🔗

The ScienceDirect overview on agricultural biodiversity highlights that researchers have found specific genes in crop relatives that can increase oil content in maize, boost beta-carotene levels, or improve sugar yield in tomatoes. These discoveries are only possible because of the vast genetic variation maintained within agrobiodiversity.

The Andean region of Peru illustrates this well. A single farmer there may grow 20 to 30 different types of potatoes in one field. Each variety carries genetic traits suited to specific micro-climates, soil conditions, and pest pressures. Losing even a few of these varieties means losing genetic options that could prove invaluable for future crop breeding – especially as climate change reshapes growing conditions worldwide.

According to the FAO, only about 12 plant species and five animal species now supply 75% of the world’s food, and just three crops – rice, maize, and wheat – provide nearly 60% of global calories and protein. This narrowing of our food base makes the remaining genetic diversity within these and other species all the more critical.

Sustainable use and livelihood links 🔗

Conservation of general biodiversity often means setting areas aside and minimising human interference – think national parks and wildlife reserves. Agrobiodiversity conservation works the opposite way. It is inherently linked to sustainable use within agroecosystems and is deeply connected to farmers’ livelihoods.

The FAO’s framework on agrobiodiversity makes this connection explicit: because agrobiodiversity is managed by humans, its conservation in production systems is directly tied to sustainable use. In practice, this means that the best way to conserve a traditional rice variety or a heritage livestock breed is often to keep growing it and using it – not to lock it away.

The role of local knowledge and cultural practices 🔗

Local and indigenous knowledge systems are not merely complementary to agrobiodiversity – they are integral parts of it. Farmers across the world carry generations of accumulated knowledge about which crop varieties thrive in specific soils, which livestock breeds tolerate local diseases, and which planting techniques preserve soil health. This knowledge is transmitted through cultural practices, seed-sharing networks, and community traditions.

Many smallholder farmers, particularly in environments where high-yield commercial varieties do not perform well, rely on a wide range of crop and livestock types to manage risk. As the FAO notes, these farmers use diversity as a strategy against pathogen infestation, uncertain rainfall, fluctuating cash crop prices, and unpredictable availability of agrochemicals. So-called “minor” or “underutilised” crops – often grown alongside main staples – can play a disproportionately important role in local food systems and livelihoods.

This tight coupling between use, knowledge, and conservation means that agrobiodiversity cannot be managed through purely biological or technical approaches. Social, economic, and cultural dimensions must be central to any conservation strategy.

Conservation approaches: beyond protected areas 🔗

For general biodiversity, protected areas – national parks, marine reserves, biosphere reserves – are a cornerstone of conservation. For agrobiodiversity, this approach is far less relevant. You cannot conserve a domesticated crop variety by fencing off a forest; it needs to be planted, tended, harvested, and replanted.

Ex situ conservation in gene banks 🔗

In industrial agricultural systems, much of the crop diversity that once existed on farms has shifted to ex situ conservation in gene banks. According to a critical review published in PMC, the global ex situ conservation system has evolved over the past century as genetic erosion threatened landraces and wild relatives of major food crops. National and international gene banks were established to store and maintain germplasm materials using standardised methodologies.

Today, there are over 1,750 gene banks worldwide holding an estimated 7.4 million accessions – though only 25% to 30% of these are believed to be genetically unique. The NCBI Bookshelf describes how well-managed gene banks provide breeders with easy access to diverse genetic material from many countries through a single request, functioning as a centralised resource for crop improvement.

On-farm conservation: the complementary approach 🔗

Ex situ storage alone is not enough. Gene banks preserve genetic material in a static, frozen state – but they cannot replicate the dynamic, ongoing evolution that occurs when crops are grown in real environments. On-farm conservation, where farmers continue cultivating traditional varieties in their fields, allows crops to keep adapting to changing conditions like shifting pest pressures and new climate patterns.

An effective conservation strategy for agrobiodiversity therefore combines both approaches: gene banks as a safety net and backup, and on-farm cultivation as a living, evolving repository. This dual strategy is fundamentally different from the protected-area model used for wild biodiversity.

Why these distinctions matter 🔗

Understanding what sets agrobiodiversity apart from general biodiversity is not just an academic exercise. These five distinctive features – human intervention, international interdependence, dual-level diversity, livelihood linkages, and unique conservation needs – have direct implications for policy, research, and practice.

Climate change is intensifying pressure on agricultural systems globally. The IPCC has projected significant shifts in land suitability for current crops, with some regions gaining and others losing productive capacity. The genetic resources contained within diverse crop varieties and livestock breeds offer essential adaptation options against these uncertain future conditions.

At the same time, our food base is narrowing dangerously. Over 90% of crop varieties have disappeared from farmers’ fields in the past century, and half the breeds of many domestic animal species have been lost. Recognising agrobiodiversity’s unique characteristics helps us design better conservation strategies, create more effective international cooperation frameworks, and support the farming communities whose knowledge and practices keep this diversity alive.

What do you think? Given that agrobiodiversity depends so heavily on human management and cultural knowledge, how can we ensure that the rapid modernisation of agriculture doesn’t erase the very diversity we’ll need to face future food challenges? And in your view, should international policies prioritise on-farm conservation or gene bank storage – or is the answer always a combination of both?

References

1. https://www.fao.org/4/y5609e/y5609e01.htm
2. https://www.fao.org/4/y5956e/Y5956E03.htm
3. https://www.fao.org/plant-treaty/areas-of-work/the-multilateral-system/research-paper-8/en/
4. https://blog.ucs.org/science-blogger/we-all-benefit-from-foreign-nations-food-crop-diversity-but-do-our-politics-reflect-this-interdependence/
5. https://www.croptrust.org/about/governance/the-international-plant-treaty/
6. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/agricultural-biodiversity
7. https://pmc.ncbi.nlm.nih.gov/articles/PMC8472064/
8. https://www.ncbi.nlm.nih.gov/books/NBK599658/