Agroecology Knowledge Hub

Diversity: diversification is key to agroecological transitions to ensure food security and nutrition while conserving, protecting and enhancing natural resources

Agroecological systems are highly diverse. From a biological perspective, agroecological systems optimize the diversity of species and genetic resources in different ways. For example, agroforestry systems organize crops, shrubs, livestock and trees of different heights and shapes at different levels or strata, increasing vertical diversity. Intercropping combines complementary species to increase spatial diversity. Crop rotations, often including legumes, increase temporal diversity. Crop–livestock systems rely on the diversity of local breeds adapted to specific environments. In the aquatic world, traditional fish polyculture farming, Integrated Multi-Trophic Aquaculture (IMTA) or rotational crop-fish systems follow the same principles to maximising diversity.

Increasing biodiversity contributes to a range of production, socio-economic, nutrition and environmental benefits. By planning and managing diversity, agroecological approaches enhance the provisioning of ecosystem services, including pollination and soil health, upon which agricultural production depends. Diversification can increase productivity and resource-use efficiency by optimizing biomass and water harvesting.

Agroecological diversification also strengthens ecological and socio-economic resilience, including by creating new market opportunities. For example, crop and animal diversity reduces the risk of failure in the face of climate change. Mixed grazing by different species of ruminants reduces health risks from parasitism, while diverse local species or breeds have greater abilities to survive, produce and maintain reproduction levels in harsh environments. In turn, having a variety of income sources from differentiated and new markets, including diverse products, local food processing and agritourism, helps to stabilize household incomes.

Consuming a diverse range of cereals, pulses, fruits, vegetables and animal-source products contributes to improved nutritional outcomes. Moreover, the genetic diversity of different varieties, breeds and species is important in contributing macronutrients, micronutrients and other bioactive compounds to human diets. For example, in Micronesia, reintroducing an underutilized traditional variety of orange-fleshed banana with 50 times more beta-carotene than the widely available commercial white-fleshed banana proved instrumental in improving health and nutrition.

At the global level, three cereal crops provide close to 50 percent of all calories consumed, while the genetic diversity of crops, livestock, aquatic animals and trees continues to be rapidly lost. Agroecology can help reverse these trends by managing and conserving agro-biodiversity, and responding to the increasing demand for a diversity of products that are eco-friendly. One such example is ‘fish-friendly’ rice produced from irrigated, rainfed and deepwater rice ecosystems, which values the diversity of aquatic species and their importance for rural livelihoods.

Database

El video es una producción desarrollada dentro del proyecto “Comunidad, Comida y Salud kichwa: mujeres y un nuevo diálogo entre tradición y modernidad culinaria” organizado por la Universidad Regional Amazónica Ikiam, Universidad Tecnológica Equinoccial (UTE), Universidad Nacional de Educación a Distancia (UNED), Universitat Oberta de Catalunya (UOC) y la Agencia Española de Cooperación...
Ecuador
Video
2019
This recommendation paper presents general recommendations for food systems transformation to achieve net-zero emissions from food production by 2030 and net negative emissions from food systems by 2050. According to the document the following actions are needed to transform food systems: 1. A global shift to nature-positive production: Nature-positive food production systems protect...
Policy brief/paper
2021
This course addressed issues and articulations around local agroecological based food systems, including food resistances, which together with agroecological experiences constitute the responses against agro-industrial crops (genetically modified, monocultures, biofuels, greenhouses, etc.) and food models (large surfaces, junk food, school catering, etc.) that generate enormous inequalities and seriously affect the...
Learning
2020
The Globally Important Agricultural Heritage Systems (GIAHS) programme, launched as an initiative of the United Nations Food and Agriculture Organization (FAO) in 2002, provides international recognition to important traditional agricultural systems (including forestry and fisheries) which conserve agrobiodiversity, indigenous knowledge, culture heritage and agricultural landscapes. Today (as of August 2017), there...
Japan
Case study
2017
A movement is growing. While agroecology has been practiced for millennia in diverse places around the world, today we are witnessing the mobilisation of transnational social movements to build, defend and strengthen agroecology as the pathway towards a most just, sustainable and viable food and agriculture system. This video explores...
Video
2015