ILRI’s Jimmy Smith on farm animal diversity for more sustainable and resilient global food systems

Food Forever is a global partnership to raise awareness on the importance and urgency of conserving and using agricultural biodiversity. The initiative works specifically to enhance the crop and livestock diversity that sustains global food production. Smith is one of 30 Food Forever champions advocating this important cause.

Smith spoke on the central importance of better conserving, characterizing and using the world’s remaining livestock diversity to ensure future food security in the face of climate and other changes.

Why care about livestock?

Livestock are critical for food and nutrition security, and thus to achieving SDG2 on zero hunger.

• Livestock-derived foods provide essential micronutrients that are either not found in plant-based foods, are present in lower concentrations or are less bioavailable.
• Livestock-derived foods are essential for many of the world’s most vulnerable people. Consumption of modest amounts of milk, eggs and meat is critical during the first 1000 days of life and continues to be very important for the development of children in their first 3000 days. But inclusion of these nutrient-dense foods in the monotonous diets of many poor people remains important throughout their adulthood also, particularly for women of child-bearing age and for the sick and elderly.
• Without livestock, as much as half of the developing world’s staple cereals and legumes could not be grown. Livestock-generated incomes provide the means to purchase essential farm inputs, manure replenishes soils and animal traction provides ploughing—all of which are essential for crop production.

Achieving sustainable and resilient food systems worldwide will be impossible without the livestock sector.

• Livestock are the sole assets some 200 million people living in marginal drylands who rely on their animal stock to help them adapt to climate change.
• Livestock manure helps ‘close nutrient cycles’ by replenishing depleted crop and pasture soils with nitrogen and other benefits.
• Well-managed cattle and other ruminants renew rangelands and stimulate healthy growth of biomass on semi-arid and marginal lands.
• Basic improvements in the world’s smallholder livestock systems could reduce greenhouse gas emissions from livestock by as much as 30%.
• Supporting the environmental stewardship provided by the world’s pastoral peoples could significantly increase carbon sequestration as well as biodiversity conservation.

The livestock sector is one of the fastest growing, valuable, most diverse and at times controversial sectors of agriculture.

• Demand for animal-source foods will continue to rise dramatically over the coming decades. Nearly all of that growth will occur in emerging and developing economies, the result of increases in population, urbanization and incomes.
• From 2005 to 2030, demand for beef in emerging and developing regions is likely to increase by more than 100%, while in high-income countries, demand will likely grow by less than 20%.
• Such increases in the developing world are not driven by over-consumption. In 2016, per capita consumption of meat in Africa was on average only 8 kg a year, compared to an average of 69 kg a year in Europe.
• Livestock production can also cause harms. These dangers include environmental problems, such as emissions of greenhouse gases, and public health challenges, such as the on-going obesity epidemic among better-off communities due to over-consumption of food, the emergence of (zoonotic) diseases passed from animals to people, and bacterial and other diseases caused by contaminated meat, milk and eggs. It is clear that meeting the world’s increasing demand for livestock-derived foods in ways that more help than harm human health and the environment presents considerable challenges.

Recognizing and harnessing the diversity of ways in which animals are raised, processed and marketed is key to maximizing the benefits from the sector.

• There are opportunities to recognize and harness the diversity of the developing world’s livestock production systems, which currently provide considerable amounts of meat, milk and cereals as well as supporting the livelihoods of many hundreds of millions of people

Why care about livestock biodiversity?

Just as the ways in which livestock are raised, processed and marketed are greatly diverse, so, too, is the great diversity among livestock species.

And just as Kenya makes much of the ‘Big Five’ wildlife species that every tourist ‘must see’—lion, leopard, rhinoceros, elephant and Cape buffalo—there exists a ‘Big Five’ among the world’s 38 domestic livestock species—cattle, sheep, goats, pigs, and chickens, which are the species that are farmed to produce most of the milk, meat and eggs consumed worldwide today.

At any one time there are an estimated 37 billion of these animals alive on the planet.

These five species underpin the livelihoods of some three-quarters of a billion people in developing and emerging economies where they are also critical for food and nutrition security, human health and environmental management.

The world’s domesticated food-producing animal stock make up an average of 40% of the world’s agricultural gross domestic product.

The livestock sector is undergoing significant changes, especially to respond to a rapidly rising demand for meat, milk and eggs in emerging and developing economies. Maintaining animal genetic diversity is key to meeting that rising demand without putting the environment or public health at risk, because that diversity can ensure a resilient sector that contributes sustainably and equitably to food production.

The more than 8,000 reported breeds of livestock constitute an essential resource for new genetic diversity that will ensure animal production is able to adapt to climate change, to respond to new market opportunities and to deal with new disease threats.

Why do we still need to maintain livestock diversity when there have been such considerable advances in developing high-producing breeds, especially of the ‘Big Five’?

• This diversity is itself the foundation on which remarkable gains have been realized in improving the productivity of commercial breeds.
• Whereas commercial breeds were developed to fit specific controlled production systems, the world’s remaining livestock diversity storehouse remains an essential source of genetic material that can be developed using new gene editing techniques to fast track the development of more productive and resilient ‘synthetic’, or hybrid, breeds.
• Livestock genetic diversity also supports customized crossbreeding programs tailored for specific production systems and markets, thus ensuring sustained and improved utilization of indigenous and locally adapted breeds.

Harnessing livestock diversity

To harness the diversity of livestock for production enterprises today and tomorrow, three things need to be addressed, and there are exciting opportunities to apply new technologies to do so.

Keep (or conserve) and protect diversity so it’s maintained to meet current and future needs.

• Prevent erosion of unique livestock diversity, including by identifying the threats to that diversity.
• Conserve livestock diversity by:
  • Maintaining diversity in its usual environments (in situ and in vivo). This may include exploring opportunities for niche markets, understanding the trade-offs that may be faced by farmers who keep such diversity and providing incentives to do so (and not jeopardizing livelihoods in the process), and exploring community or institutional ownership as a way of balancing risks that individuals may face in maintaining some breeds.
  • Maintaining livestock diversity in research settings (ex situ and in vivo) through cryopreservation of tissues or genetic materials. This work requires considerable knowledge of the genetic basis for diversity. By 2015, 64 countries had in vitro genebanks, with a further 41 in progress.

Understand livestock genetic diversity. The recent advances in genomics sciences and technologies are giving scientists a much better understanding of the genetic basis for diversity. This presents new opportunities to put that diversity to better use through, for example, matching the vast livestock genetic information to animal phenotypes and pedigrees for vastly improved breeding.

Put livestock diversity into use. This is paramount. Livestock diversity enables people to cope with climate change, to meet changing market demands and to raise animals able to resist (existing and emerging) diseases. All of these benefits of livestock diversity enhance global food security.

Cross-cutting issues

Cross-cutting issues that also need to be addressed are well articulated in FAO’s Second Report on the State of the World’s Animal Genetic Resources for Food and Agriculture (2015). The report highlights the importance of addressing:

• Institutional frameworks
• Awareness and capacity development, in, for example, genetic access and benefit sharing.
• Improved breeding strategies and programs (taking advantage of new genomics)
• Strategies for expanding conservation approaches
• Supporting national strategies and action plans (in 2015, 112 countries had a national strategy and action plan), following the adoption of the Global Plan of Action for Animal Genetic Resources adopted in 2007.
• Improving international cooperation

Livestock forage diversity

Livestock diversity itself relies on plant diversity, of course. ILRI has a forage genebank that conserves nearly 19,000 accessions of forages from over 1000 species. This is one of the most diverse collections of forage grasses, legumes and fodder tree species held in any genebank in the world and includes the world’s major collection of African grasses and tropical highland forages. This unique collection of forage diversity has the potential to better feed farm animals, especially ruminants, across the tropics.

We are losing the genetic resources locked up in the world’s domesticated livestock at an unprecedented rate

Of the 7,616 breeds of domestic livestock reported to FAO, 1,491, or 20%, are classified as being ‘at risk’. What’s at stake in this ‘livestock meltdown’ is nothing less than the animal basis for world food security. If we are to adapt food production systems to radically changing conditions in the coming decades, animal as well as plant genetic diversity will be critical resources for doing so. Traditional breeds offer diversity, which is the only base for future selection and adaptation. The on-going loss of our livestock genetic heritage is tantamount to losing a road map for survival—the key to food security, environmental stability and improving the human condition. Here are five rare ‘vintage cows’ of Africa that could be part of that road map.

September 25, 2018 - ILRI