Based on information provided by 91 countries and 27 international organizations, analysis of global literature and datasets, and contributions from over 175 authors and reviewers, The State of the World’s Biodiversity for Food and Agriculture assesses biodiversity for food and agriculture and its management worldwide.
Biodiversity is the variety of life at genetic, species and ecosystem levels. Biodiversity for food and agriculture (BFA) is, in turn, the subset of biodiversity that contributes in one way or another to agriculture and food production. It includes the domesticated plants and animals that are part of crop, livestock, forest or aquaculture systems, harvested forest and aquatic species, the wild relatives of domesticated species, and other wild species harvested for food and other products. It also encompasses what is known as “associated biodiversity”, the vast range of organisms that live in and around food and agricultural production systems1, sustaining them and contributing to their output.
Biodiversity for food and agriculture is indispensable to food security and sustainable development. It supplies many vital ecosystem services, such as creating and maintaining healthy soils, pollinating plants, controlling pests and providing habitat for wildlife, including for fish and other species that are vital to food production and agricultural livelihoods.
Biodiversity makes production systems and livelihoods more resilient to shocks and stresses, including those caused by climate change. It is a key resource in efforts to increase food production while limiting negative impacts on the environment. It makes a variety of contributions to the livelihoods of many people, often reducing the need for food and agricultural producers to rely on costly or environmentally harmful external inputs.
Biodiversity at genetic, species and ecosystem levels helps address the challenges posed by diverse and changing environmental conditions and socio-economic circumstances. Diversifying production systems, for example by using multiple species, breeds or varieties, integrating the use of crop, livestock, forest and aquatic biodiversity, or promoting habitat diversity in the local landscape or seascape, helps to promote resilience, improve livelihoods and support food security and nutrition.
Many key components of biodiversity for food and agriculture at genetic, species and ecosystem levels are in decline. The proportion of livestock breeds at risk of extinction is increasing. Overall, the diversity of crops present in farmers’ fields has declined and threats to crop diversity are increasing.
Many species, including pollinators, soil organisms and the natural enemies of pests, that contribute to vital ecosystem services are in decline as a consequence of the destruction and degradation of habitats, overexploitation, pollution and other threats. There is also a rapid decline in key ecosystems that deliver numerous services essential to food and agriculture, including supply of freshwater, protection against storms, floods and other hazards, and habitats for species such as fish and pollinators.
Wild foods contribute to food security both via direct consumption (on a regular basis or as an emergency measure in times of scarcity) and by being sold to buy other food. Many wild foods are rich in micronutrients, some containing more than their cultivated counterparts. Eating them can alleviate micronutrient and/or protein deficiencies and thus make diets more nutritious and balanced. However, there are many concerns about the unsustainable use of wild foods.
Contributing countries reported 3 980 wild food species (2 822 distinct species, as several are reported by more than one country), of which the vast majority are plants, followed by fish and mammals.
BFA is being affected by major global trends such as changes in climate, international markets and demography. These are giving rise to other challenges such as land-use change, pollution, overuse, overharvesting and the proliferation of invasive species. Interactions between these trends can often exacerbate their effects on BFA. Demographic changes, urbanization, markets, trade and consumer preferences strongly influence food systems, frequently with negative consequences for BFA and the ecosystem services it provides. However, such drivers also open opportunities to make food systems more sustainable, for example through the development of markets for biodiversity-friendly products.
Many of the drivers that have negative impacts on BFA, including overexploitation, overharvesting, pollution, overuse of external inputs and changes in land and water management, are at least partially, caused by inappropriate agricultural practices.
According to the countries that contributed to the report, changes in land and water use and management is the driver that most negatively affects the regulatory and supporting functions of ecosystems. For example, ecosystems help to regulate climate, filter air and water and safeguard soil fertility. They also support plants and animals by providing diverse habitats. These functions are all severely threatened by irresponsible changes in land and water management.
The loss of traditional lifestyles as a result of population growth, urbanization, the industrialization of agriculture and food processing is also negatively affecting BFA and the maintenance of traditional knowledge related to it.
Where associated biodiversity, i.e. the vast range of organisms that live in and around food and agricultural production systems, is concerned, different regions report very different threat patterns. While all regions report the alteration or loss of habitats as major threats, other major threats identified are: overexploitation, hunting and poaching in Africa; deforestation in Asia; deforestation, changes in land use and agricultural intensification and expansion in Europe and Central Asia; overexploitation, pests, diseases and invasive species in Latin America and the Caribbean; and overexploitation in the Near East and North Africa.
Policy measures and advances in science and technology may mitigate the negative effects of other drivers on BFA. They provide critical entry points for interventions supporting sustainable use and conservation. However, policies intended to promote the sustainable management of BFA are often weakly implemented.
More knowledge is needed on associated biodiversity and on its role in supplying ecosystem services. In particular, more information is need about micro-organisms and invertebrates.
Many associated biodiversity species have never been identified and described, particularly in the case of invertebrates and micro-organisms. Even when they have, their functions within the ecosystem often remain poorly understood. Over 99 percent of bacteria and protist species remain unknown. For several types of associated biodiversity, including soil micro-organisms and those used for food processing, advances in molecular techniques and sequencing technologies are facilitating characterization. Several countries have active programmes for characterizing soil micro-organisms using molecular methods. In many countries, however, gaps in terms of skills, facilities and equipment constrain opportunities to benefit from these developments.
