Agrobiodiversity as a Pillar of Climate-Resilient Agriculture
Agrobiodiversity—the variety and variability of crops, livestock, and associated biota in agroecosystems—is foundational to building resilience in agricultural systems facing climatic and ecological pressures. As climate change accelerates, reliance on a narrow base of species has increased systemic vulnerability in global food production. This paper explores the multifaceted role of agrobiodiversity in enhancing climate resilience, improving ecosystem services, and supporting long-term sustainability in food systems. Drawing from global case studies and a wide body of peer-reviewed research, we argue that agrobiodiversity is not merely a conservation tool but a core strategy for ecological and economic resilience. Barriers to its widespread adoption are discussed, along with policy and research pathways for integration into mainstream agricultural systems.
Agrobiodiversity—the variety and variability of crops, livestock, and associated biota in agroecosystems—is foundational to building resilience in agricultural systems facing climatic and ecological pressures. As climate change accelerates, reliance on a narrow base of species has increased systemic vulnerability in global food production. This paper explores the multifaceted role of agrobiodiversity in enhancing climate resilience, improving ecosystem services, and supporting long-term sustainability in food systems. Drawing from global case studies and a wide body of peer-reviewed research, we argue that agrobiodiversity is not merely a conservation tool but a core strategy for ecological and economic resilience. Barriers to its widespread adoption are discussed, along with policy and research pathways for integration into mainstream agricultural systems.
|
Agricultural biodiversity—or agrobiodiversity—comprises the variety of genetic resources used in agriculture, including crop varieties, livestock breeds, their wild relatives, and the ecosystems that support them (FAO, 2019). These resources play a critical role in supporting ecosystem functionality, ensuring food security, and enabling agricultural systems to adapt to changing climatic conditions. In an era of global climate instability, biodiversity-rich agricultural systems are increasingly seen as a buffer against environmental shocks.
Modern agricultural practices, however, often favor uniformity over diversity, leading to a narrowing genetic base and increased vulnerability to pests, diseases, and climate variability (Khoury et al., 2014). This homogenization has contributed to biodiversity loss and reduced resilience in global food systems. Thus, reversing the trend and investing in agrobiodiversity is essential for achieving climate resilience and sustainability. Agrobiodiversity and Climate Resilience
Agrobiodiversity serves as a form of ecological insurance against climate risks by promoting adaptive capacity and system redundancy. Diverse cropping systems, particularly those maintained by smallholder farmers, provide a buffer against variable weather conditions, pest outbreaks, and soil degradation (Altieri et al., 2015). |
|
For instance, traditional farming communities in Zimbabwe, Nepal, and Timor-Leste conserve hundreds of crop varieties, enabling flexible adaptation to droughts, flooding, and unpredictable growing seasons (Satoyama Initiative, 2022). These practices have persisted through generations and continue to offer practical, culturally rooted resilience strategies.
A global review by Dancer et al. (2024), analyzing 193 studies, showed that agrobiodiversity positively impacts climate resilience in many systems, especially where it is combined with agroecological practices. However, effects can vary depending on socioeconomic context, local knowledge systems, and institutional support.
Long-Term Benefits of Agricultural Diversification
While short-term gains from biodiversity may be difficult to quantify, the long-term benefits are extensive. A meta-analysis by Tamburini et al. (2024) examining over five decades of data demonstrated that diversified agriculture significantly increases biodiversity (+60%), soil fertility (+45%), pollination services, and carbon sequestration (+200%). Notably, it found that after a 25-year threshold, yield trade-offs tend to disappear, and diversified systems begin to outperform monocultures in both productivity and profitability.
This indicates that agrobiodiversity should be considered a strategic investment rather than a cost. It enhances ecosystem services over time, reducing dependence on synthetic inputs and increasing system self-regulation.
Genetic Diversity as a Tool for Future Adaptation
Global food systems rely on a narrow pool of crops—just nine species provide over two-thirds of human caloric intake (FAO, 2019). This genetic bottleneck limits our ability to breed new varieties capable of withstanding climate-induced stressors.
Crop wild relatives and traditional landraces hold untapped potential for traits such as drought resistance, heat tolerance, and pest resistance (Castañeda-Álvarez et al., 2016). Unfortunately, many of these resources are poorly conserved and underutilized. In situ conservation—through farmer-managed seed systems and community gene banks—offers a promising pathway to maintain adaptive capacity while supporting local food sovereignty (Zimmerer et al., 2022).
Programs like the Svalbard Global Seed Vault and Bioversity International’s seed networks emphasize the urgency of conserving genetic diversity before it is irreversibly lost.
A global review by Dancer et al. (2024), analyzing 193 studies, showed that agrobiodiversity positively impacts climate resilience in many systems, especially where it is combined with agroecological practices. However, effects can vary depending on socioeconomic context, local knowledge systems, and institutional support.
Long-Term Benefits of Agricultural Diversification
While short-term gains from biodiversity may be difficult to quantify, the long-term benefits are extensive. A meta-analysis by Tamburini et al. (2024) examining over five decades of data demonstrated that diversified agriculture significantly increases biodiversity (+60%), soil fertility (+45%), pollination services, and carbon sequestration (+200%). Notably, it found that after a 25-year threshold, yield trade-offs tend to disappear, and diversified systems begin to outperform monocultures in both productivity and profitability.
This indicates that agrobiodiversity should be considered a strategic investment rather than a cost. It enhances ecosystem services over time, reducing dependence on synthetic inputs and increasing system self-regulation.
Genetic Diversity as a Tool for Future Adaptation
Global food systems rely on a narrow pool of crops—just nine species provide over two-thirds of human caloric intake (FAO, 2019). This genetic bottleneck limits our ability to breed new varieties capable of withstanding climate-induced stressors.
Crop wild relatives and traditional landraces hold untapped potential for traits such as drought resistance, heat tolerance, and pest resistance (Castañeda-Álvarez et al., 2016). Unfortunately, many of these resources are poorly conserved and underutilized. In situ conservation—through farmer-managed seed systems and community gene banks—offers a promising pathway to maintain adaptive capacity while supporting local food sovereignty (Zimmerer et al., 2022).
Programs like the Svalbard Global Seed Vault and Bioversity International’s seed networks emphasize the urgency of conserving genetic diversity before it is irreversibly lost.
Ecosystem Services Provided by Agrobiodiversity
Agrobiodiversity supports a broad range of ecosystem services vital for productive and sustainable agriculture:
Agrobiodiversity supports a broad range of ecosystem services vital for productive and sustainable agriculture:
- Diverse habitats within farms (e.g., hedgerows, flower strips) support a range of wild pollinators, enhancing crop yields beyond what managed honeybees alone can provide. Klein et al. (2007) showed that 75% of leading global food crops depend, at least in part, on animal pollination.
- Diverse cropping systems reduce pest outbreaks through mechanisms such as natural enemy augmentation and habitat diversification. Letourneau et al. (2011) found that pest damage was significantly lower in diverse farms than monocultures.
- Cover crops, intercropping, and diverse root structures enhance soil structure, increase microbial activity, and improve nutrient retention (Bender et al., 2016). These factors collectively reduce erosion and improve productivity.
- Agroforestry and perennial cropping systems store carbon in both biomass and soils. Jose (2009) estimated that agroforestry systems can sequester between 1.5 to 3.5 Mg C/ha/year, depending on the species and management practices.
Agroforestry: A Model for Biodiversity-Based Resilience
Agroforestry integrates trees, crops, and/or livestock in spatial or temporal arrangements. It serves as a highly functional model of agrobiodiversity, delivering multiple services including food, fuel, fiber, shade, and fodder.
In the Gedeo zone of Ethiopia, traditional agroforestry systems incorporate enset, coffee, and native tree species. These systems have proven remarkably resilient to climate variability while maintaining high levels of biodiversity and supporting cultural traditions (De Beenhouwer et al., 2023).
In Central America, the “Quesungual” system—a form of slash-and-mulch agroforestry—has successfully rehabilitated degraded lands, reduced runoff, and increased yields under rain-fed conditions (Franzel et al., 2014).
Mediterranean Agroecology and Economic Resilience
Agroecological systems in southern Europe provide additional evidence of the resilience-diversity link. Farmers practicing intercropping, organic amendments, and conservation tillage in regions of Italy and Spain have reported greater long-term yields, enhanced drought tolerance, and improved soil fertility (Canali et al., 2023). These systems also reduce reliance on external inputs and create market differentiation, supporting higher price premiums in some cases.
While transition costs can be a barrier, the long-term economic benefits and ecological stability offer compelling reasons for wider adoption.
Policy and Institutional Challenges
Despite the evidence supporting agrobiodiversity, several institutional and policy barriers hinder its integration:
Addressing these challenges requires aligning agricultural policies with biodiversity goals, supporting participatory breeding programs, and enabling community seed systems. Payments for ecosystem services (PES), biodiversity-friendly certification schemes, and market incentives could also help mainstream agrobiodiversity (Kremen & Merenlender, 2018).
Conclusion
Agrobiodiversity is an indispensable component of resilient, sustainable agriculture. It enables systems to adapt to environmental shocks, supports vital ecosystem services, and secures genetic resources for future innovation. Its role extends beyond ecological function—it is an economic, cultural, and social asset.
To scale up biodiversity-based approaches, we must bridge science and policy, empower farmers as biodiversity stewards, and reconfigure food systems to value resilience as much as productivity. The future of food security may depend not on the next yield-boosting technology but on the ancient wisdom of diversity.
Agroforestry integrates trees, crops, and/or livestock in spatial or temporal arrangements. It serves as a highly functional model of agrobiodiversity, delivering multiple services including food, fuel, fiber, shade, and fodder.
In the Gedeo zone of Ethiopia, traditional agroforestry systems incorporate enset, coffee, and native tree species. These systems have proven remarkably resilient to climate variability while maintaining high levels of biodiversity and supporting cultural traditions (De Beenhouwer et al., 2023).
In Central America, the “Quesungual” system—a form of slash-and-mulch agroforestry—has successfully rehabilitated degraded lands, reduced runoff, and increased yields under rain-fed conditions (Franzel et al., 2014).
Mediterranean Agroecology and Economic Resilience
Agroecological systems in southern Europe provide additional evidence of the resilience-diversity link. Farmers practicing intercropping, organic amendments, and conservation tillage in regions of Italy and Spain have reported greater long-term yields, enhanced drought tolerance, and improved soil fertility (Canali et al., 2023). These systems also reduce reliance on external inputs and create market differentiation, supporting higher price premiums in some cases.
While transition costs can be a barrier, the long-term economic benefits and ecological stability offer compelling reasons for wider adoption.
Policy and Institutional Challenges
Despite the evidence supporting agrobiodiversity, several institutional and policy barriers hinder its integration:
- Seed laws often favor commercial varieties and restrict farmer seed exchange.
- Subsidy structures tend to support input-intensive monocultures.
- Research funding is disproportionately allocated to high-input commodity systems.
Addressing these challenges requires aligning agricultural policies with biodiversity goals, supporting participatory breeding programs, and enabling community seed systems. Payments for ecosystem services (PES), biodiversity-friendly certification schemes, and market incentives could also help mainstream agrobiodiversity (Kremen & Merenlender, 2018).
Conclusion
Agrobiodiversity is an indispensable component of resilient, sustainable agriculture. It enables systems to adapt to environmental shocks, supports vital ecosystem services, and secures genetic resources for future innovation. Its role extends beyond ecological function—it is an economic, cultural, and social asset.
To scale up biodiversity-based approaches, we must bridge science and policy, empower farmers as biodiversity stewards, and reconfigure food systems to value resilience as much as productivity. The future of food security may depend not on the next yield-boosting technology but on the ancient wisdom of diversity.
Literature Cited
Altieri, M. A., Nicholls, C. I., Henao, A., & Lana, M. A. (2015). Agroecology and the design of climate change-resilient farming systems. Agronomy for Sustainable Development, 35(3), 869–890. https://doi.org/10.1007/s13593-015-0285-2
Bender, S. F., Wagg, C., & van der Heijden, M. G. A. (2016). An underground revolution: Biodiversity and soil ecological engineering for agricultural sustainability. Trends in Ecology & Evolution, 31(6), 440–452. https://doi.org/10.1016/j.tree.2016.02.016
Bezner Kerr, R., Dancer, A., & Madsen, S. (2024). Agrobiodiversity and resilience: A global synthesis. Global Food Security, 42, 100713. https://doi.org/10.1016/j.gfs.2024.100713
Canali, S., Martini, E., Neri, D., & Antichi, D. (2023). Agroecological practices and resilience in Mediterranean agriculture: Evidence from diversified farms in Italy and Spain. Agroecology and Sustainable Food Systems, 47(2), 201–218. https://doi.org/10.1080/21683565.2022.2160932
Castañeda-Álvarez, N. P., Khoury, C. K., Achicanoy, H. A., et al. (2016). Global conservation priorities for crop wild relatives. Nature Plants, 2(4), 16022. https://doi.org/10.1038/nplants.2016.22
Dancer, A., Bezner Kerr, R., & Madsen, S. (2024). Agrobiodiversity and climate resilience: A review of empirical evidence. Ecology and Society, 29(1), Article 5. https://doi.org/10.5751/ES-14456-290105
De Beenhouwer, M., Aerts, R., & Honnay, O. (2023). Agroforestry enhances biodiversity and ecosystem carbon storage: A case study from the Gedeo zone in Ethiopia. Frontiers in Sustainable Food Systems, 7, 1260291. https://doi.org/10.3389/fsufs.2023.1260291
FAO. (2019). The State of the World’s Biodiversity for Food and Agriculture. Commission on Genetic Resources for Food and Agriculture. https://www.fao.org/3/CA3129EN/CA3129EN.pdf
Franzel, S., Carsan, S., Lukuyu, B., Sinja, J., & Wambugu, C. (2014). Fodder trees for improving livestock productivity and smallholder livelihoods in Africa. Current Opinion in Environmental Sustainability, 6, 98–103. https://doi.org/10.1016/j.cosust.2013.11.008
Jose, S. (2009). Agroforestry for ecosystem services and environmental benefits: An overview. Agroforestry Systems, 76(1), 1–10. https://doi.org/10.1007/s10457-009-9229-7
Khoury, C. K., Bjorkman, A. D., Dempewolf, H., et al. (2014). Increasing homogeneity in global food supplies and the implications for food security. Proceedings of the National Academy of Sciences, 111(11), 4001–4006. https://doi.org/10.1073/pnas.1313490111
Klein, A. M., Vaissière, B. E., Cane, J. H., et al. (2007). Importance of pollinators in changing landscapes for world crops. Proceedings of the Royal Society B: Biological Sciences, 274(1608), 303–313. https://doi.org/10.1098/rspb.2006.3721
Kremen, C., & Merenlender, A. M. (2018). Landscapes that work for biodiversity and people. Science, 362(6412). https://doi.org/10.1126/science.aau6020
Letourneau, D. K., Armbrecht, I., Rivera, B. S., et al. (2011). Does plant diversity benefit agroecosystems? A synthetic review. Ecological Applications, 21(1), 9–21. https://doi.org/10.1890/09-2026.1
Satoyama Initiative. (2022). The use of agrobiodiversity by traditional agricultural communities in adapting to climate change. https://satoyamainitiative.org/case_studies/the-use-of-agrobiodiversity-by-indigenous-and-traditional-agricultural-communities-in-adapting-to-climate-change/
Tamburini, G., Bommarco, R., Wanger, T. C., et al. (2024). Fifty years of agricultural diversification: Impacts on biodiversity and ecosystem services. arXiv preprint, arXiv:2403.05599. https://arxiv.org/abs/2403.05599
Thrupp, L. A. (2000). Linking agricultural biodiversity and food security: The valuable role of agrobiodiversity for sustainable agriculture. International Affairs, 76(2), 265–281. https://doi.org/10.1111/1468-2346.00133
Zimmerer, K. S., De Haan, S., Jones, A. D., & Meacham, M. (2022). Conserving agrobiodiversity through farmer seed networks and participatory crop improvement. Annual Review of Environment and Resources, 47, 277–301. https://doi.org/10.1146/annurev-environ-120220-112605
Citation: Bridging Biodiversity and Agriculture: The Role of Wildlife and Pollinators in Sustainable Food Systems. Tropical Conservation Review, Tropical Conservation Fund.