Introduction
The debate between land sharing and land sparing is one of the most influential discussions in modern conservation and agricultural policy. It questions how societies can best balance food production and biodiversity conservation—either by integrating biodiversity into agriculturally productive lands (land sharing) or by concentrating production at highest yield-per-area, to leave more natural habitat intact (land sparing). The dichotomy of these two land management paradigms has shaped research, conservation planning, and agroecological discourse for nearly two decades. However, the debate is far from settled: both concepts reflect deeper assumptions about nature, governance, and rural livelihoods.
Historical Development of the Concept
The origins of this debate can be traced back to early agricultural intensification models and reserve design theory in conservation biology. The formal framing of the land sharing vs. sparing dichotomy was popularized by Balmford, Green, and Phalan in the late 2000s (Phalan et al., 2011). Their fieldwork in Ghana and India analyzed bird and tree communities along agricultural intensity gradients. Their conclusion was stark: for most species, particularly habitat specialists, biodiversity declined steeply even under low-intensity farming, making land sparing a better strategy for minimizing species loss at given production levels. By meeting food demand via highly efficient production in one area, other areas remain untouched.
This position built on the assumption that agricultural yields and biodiversity are inversely correlated—an assumption that became the foundation for global models of land use (Balmford et al., 2012). The appeal of the framework lay in its simplicity: it offered a tractable way to quantify trade-offs between conservation and production. However, its simplicity also provoked critique from agroecologists and social scientists, who argued that real-world systems are more complex.
By contrast, Perfecto and Vandermeer (2010) introduced the concept of the agroecological matrix, emphasizing biodiversity conservation within agricultural landscapes. They proposed that diversified farming systems could maintain high levels of biodiversity while also supporting local livelihoods—an argument rooted in the ecological and social realities of the Global South. This perspective positioned land sharing not only as an ecological strategy but as a socio-political stance against industrial intensification.
Evolution of the Debate and Key Phases
During the period of 2010-2014, the land sparing/sharing dichotomy became a dominant research frame that continues to polarize. Phalan et al. (2011) provided empirical support for sparing, while Fischer et al. (2014) criticized the oversimplification of the debate, calling it a false dichotomy. Tscharntke et al. (2012) emphasized landscape complexity as a determinant of biodiversity outcomes, arguing that both sparing and sharing fail when isolated from socio-ecological context.
The next wave of scholarship, led by Kremen (2015) and Law et al. (2015), reframed the discussion around governance, leakage, and optimization. Kremen argued that intensification does not automatically spare land—a phenomenon known as the Jevons paradox (where efficiency gains increase total consumption). Law et al. used spatial optimization models to show that hybrid landscapes often outperform either strategy when both production and biodiversity are considered.
In this same period of a more nuanced intellectual discourse, most Northern governments have also established biofuel markets for agricultural commodities. These government biofuel mandates, particularly in the EU, United States, and Canada, have created nearly unbounded demand for crop-based fuels such as ethanol and biodiesel, fundamentally challenging the core assumption of land sparing. Because the policy framework guarantees markets for any additional yield, efficiency gains in agriculture no longer translate into reduced cultivated area; rather, they encourage further expansion into forest and grassland ecosystems. This phenomenon, known as indirect land use change (iLUC), has been documented in multiple studies (Searchinger et al., 2008; Fargione et al., 2008; Lapola et al., 2010), demonstrating how biofuel-driven demand nullifies the expected conservation benefits of intensification.
Recent analyses (Sidemo-Holm et al., 2021; Augustiny et al., 2025) show mixed empirical support overall. Some species respond best to spared reserves, others to diversified landscapes. Oliveira-Xavier et al. (2025) proposed the idea of land blending, integrating the strengths of both strategies into context-specific mosaics.
From Theory to the Real World
Theoretical Foundations
- Yield–Biodiversity Relationships: Land sparing assumes that most species cannot tolerate even low-intensity farming (Phalan et al., 2011). Land sharing, however, relies on the premise that many species persist in multifunctional landscapes if farming intensity remains moderate and habitat heterogeneity is preserved (Perfecto & Vandermeer, 2010).
- Leakage and Policy Effects: Kremen (2015) and Mertz et al. (2017) emphasized that intensification only spares land if supported by strong governance and land protection. Otherwise, higher yields may incentivize expansion or profit-driven deforestation.
- Landscape Complexity: Tscharntke et al. (2012) introduced the idea of intermediate landscape complexity, where biodiversity gains from land-sharing practices are highest in moderately transformed landscapes. In heavily simplified or largely intact landscapes, results differ substantially.
Empirical Evidence
- Land Sparing Support: Phalan et al. (2011) found that species richness declines sharply with increasing intensity, suggesting sparing protects more sensitive taxa. Balmford et al. (2012) extended this argument globally.
- Land Sharing Support: Studies on agroforestry, shade coffee, and smallholder systems show that wildlife-friendly farming supports species movement and ecosystem services (Perfecto & Vandermeer, 2010).
- Mixed Outcomes: Law et al. (2015) demonstrated that spatial optimization of mosaics—combining core reserves with high-quality agroecological matrices—often yields superior outcomes.
Practical Examples: Regenerative Grazing in Ontario
In Ontario, regenerative grazing offers a living example of land sharing in practice. Unlike conventional cow–calf and feedlot systems, which rely on concentrated grain-based feed and confine animals for rapid weight gain, regenerative grazing integrates livestock directly into perennial pastures managed for ecological processes. Cattle are rotated frequently through small paddocks, allowing vegetation recovery, carbon sequestration, and soil biota regeneration. This system mimics the ecological function of wild herbivore herds, enhancing nutrient cycling, water infiltration, and plant diversity. Studies and on-farm trials across southern Ontario show that regenerative grazing improves soil structure, supports pollinator populations, and reduces nutrient runoff compared to feedlot operations. Ontario’s Community Pastures, many of which trace back to the Prairie Farm Rehabilitation Administration era, remain among the province’s largest contiguous landscapes managed for both agriculture and biodiversity. These shared grazing lands host Ontario’s largest breeding colonies of Bobolinks and Eastern Meadowlarks, demonstrating how multi-use management can sustain populations of wild species at risk.
Likewise, regenerative market gardens practicing diversified organic or regenerative cultivation—such as our own farm—embody the same principle at a smaller scale: integrating vegetables, pollinator habitat, and hedgerows within a productive mosaic that nourishes both people and ecosystems. Our productive fields simultaneously feed many SARs – we saw four species of snakes, various amphibians and birds, flying squirrels and weasels, even apex predators such as owls and hawks.
When measured purely by yield per acre, regenerative farming is less efficient than intensive feedlots or greenhouse operations. Feedlots maximize short-term production through imported feed and confinement. Greenhouses extend the season and use intensive fertilization, which also increases yield. Yet from an ecological perspective, regenerative systems produce multiple forms of benefits—soil fertility, biodiversity habitat, hydrological resilience, and animal welfare—redefining productivity beyond kilograms of beef. In this sense, Ontario’s regenerative grazing farms exemplify the essence of land sharing: they sustain production while maintaining ecological integrity, offering a model of coexistence that challenges conventional yield-based metrics and contributes to landscape-scale biodiversity corridors.
Relation to Agroecology and Ecosystem-Embedded Farming
Agroecology embodies the principles of land sharing, emphasizing diversity, resilience, and the integration of natural and social processes. However, agroecology is not a new invention—it is a continuation of knowledge systems that long predate modern agricultural science. Across Latin America, Africa, and Asia, many Indigenous and peasant farming systems have historically practiced what we would now call agroecological land management: polycultures, rotational grazing, agroforestry, intercropping, and water-harvesting designs that sustain biodiversity while producing food. These systems form a living continuity between ancestral Indigenous stewardship and today’s agroecological movements in the Global South (Altieri, 2002; Toledo & Barrera-Bassols, 2008).
In contrast, Western agroecological approaches—such as organic, biodynamic, permaculture, and regenerative agriculture—emerged during the 20th century largely as intellectual and moral responses to industrial agriculture. While these Western movements share land-sharing ideals, their roots differ: they often arose from philosophical, anthroposophical, or ecological-scientific traditions in Europe and North America (e.g., Steiner’s biodynamics, Rodale’s organic farming, and Mollison’s permaculture). These systems reconstructed some of the ecological wisdom that Indigenous societies had maintained continuously, yet they frequently lacked explicit recognition of those earlier knowledge holders.
Today, there is growing awareness of this historical asymmetry. Many scholars and practitioners argue that Western agroecology should acknowledge its debt to Indigenous and traditional knowledge systems that sustained ecological balance for millennia. While FAO’s Agroecology Initiative and networks such as SOCLA and La Via Campesina have begun foregrounding Indigenous voices, much of the Western regenerative movement still frames its work as an innovative technology rather than a cultural continuation. As Kimmerer (2013) and Mendez et al. (2017) suggest, genuine agroecology must move beyond technique and practices—it must restore relationships, reciprocity, and cultural memory of the land. Recognizing Indigenous scholarship and history thus becomes essential for aligning modern agroecological practice with its deepest ethical roots.
Reception in the Conservation Community
The global conservation community’s reception of the land sharing–sparing debate mirrors the long intellectual arc of conservation itself—from colonial origins focused on separating people from nature to contemporary, plural approaches emphasizing coexistence and co-creation. Historically, conservation science grew out of the fortress conservation paradigm that emerged during the colonial era, where national parks and wildlife reserves were established through exclusion of Indigenous peoples. This legacy still echoes in the way land sparing is often framed: as a technical solution rooted in maximizing yields and setting aside wilderness “elsewhere.” The model tends to privilege Western ecological science and global biodiversity metrics, while undervaluing local knowledge and human-nature relationships.
The Land Sparing Current: Efficiency and Control
Supporters of land sparing, such as Andrew Balmford, Rhys Green, and Ben Phalan, largely represent institutions like the University of Cambridge Conservation Science Group, BirdLife International, and some divisions of WWF-UK. Publishing in journals such as Science, Nature, and Conservation Letters, these scholars argue that protecting large, intact reserves is essential for rare and specialist species, and that agricultural intensification—if coupled with policy safeguards—can free land for conservation (Phalan et al., 2011; Balmford et al., 2012). Their approach reflects the quantitative and global modeling traditions of 20th-century conservation biology, which often abstract social complexity in favor of measurable outcomes. Critics note that this echoes colonial logics of centralized control and the notion that human communities must be excluded to preserve “pristine” nature.
The Land Sharing Current: Coexistence and Justice
In contrast, the land sharing current is rooted in traditions of agroecology, political ecology, and environmental justice. Scholars such as Ivette Perfecto, John Vandermeer, Claire Kremen, Teja Tscharntke, and Joern Fischer—working from institutions like the University of Michigan, UC Berkeley, and Göttingen University—publish in journals such as PNAS, Biological Reviews, and Annals of the New York Academy of Sciences. They argue that biodiversity and livelihoods are best sustained through coexistence within living landscapes, not through exclusion. This approach draws inspiration from Indigenous and smallholder practices where conservation and cultivation are inseparable. It also critiques the colonial underpinnings of fortress conservation, which displaced local communities and erased knowledge systems that had long maintained biodiversity (Büscher & Fletcher, 2020).
The Integrative and Reformist Middle Ground
More recent voices, including Emily Law, David Lindenmayer, and Joern Fischer, advocate for an integrated, context-dependent synthesis. Their work with institutions such as CSIRO and the Australian National University appears in Biological Conservation and Ecology and Society. These scholars emphasize adaptive management, spatial optimization, and participatory governance—seeking to merge the quantitative rigor of sparing with the ethical and relational insights of sharing. Their approach recognizes that conservation cannot succeed without addressing power, access, and the historic inequities embedded in land tenure.
Shifting Institutions and Emerging Voices
A growing number of NGOs and intergovernmental agencies are reevaluating the colonial legacies in conservation. The Nature Conservancy (TNC) and WWF International have begun to integrate Indigenous rights frameworks, while organizations like Agroecology Europe, FAO’s Agroecology Initiative, SOCLA, and La Via Campesina foreground agroecology as a justice-centered conservation strategy. Meanwhile, global journals such as People and Nature, Ecology and Society, and Global Environmental Change increasingly publish research linking biodiversity, decolonization, and livelihood resilience.
At the same time, few conservation scientists have directly confronted the contradiction that biofuel mandates create for the land-sparing argument. The conservation community often treats food and energy policy as exogenous, yet these economic drivers largely determine land-use outcomes. Biofuel mandates in the EU, United States, and Canada have greatly expanded the market for crop-based fuels, creating an almost insatiable demand for maize, soy, and canola. This demand has contributed to tropical deforestation and grassland conversion, as well as higher commodity prices that incentivize new cropland expansion worldwide. Studies on indirect land use change (iLUC) (Searchinger et al., 2008; Fargione et al., 2008; Lapola et al., 2010) demonstrate that even as yields increase, total cultivated area continues to grow—a modern expression of the Jevons paradox and the leakage problem described earlier. These dynamics reveal that intensification policies and market-based conservation cannot succeed without strict governance and demand-side reforms. Politicians also use biofuel mandates to manage crop demand, e.g. to stabilize crop prices during trade disruptions—as currently observed in the US. Yet, when trade demand recovers but policy mandates remain in place, the resulting pressure for new land conversion increases sharply. Journals such as Conservation Biology, Global Environmental Change, and Biological Conservation have only recently begun to acknowledge how biofuel-driven land expansion undermines the practical relevance of the sparing–sharing debate, revealing that without structural economic reform, conservation strategies risk being largely symbolic. As the conservation and climate change communities have mostly separated, the heavy land footprint of biofuel and other climate action policies needs to be addressed far more explicitly.
The story of conservation is thus evolving—from exclusion to inclusion, from control to reciprocity. The land sparing–sharing debate serves as a mirror for this transformation: a field once dominated by yield metrics and reserve boundaries now increasingly reckons with its colonial inheritance and begins to embrace the principle that living landscapes thrive only when the people within them do as well.
Integrating the Debate: From Dichotomy to Synthesis
Recent meta-reviews (Augustiny et al., 2025) emphasize that neither strategy universally outperforms the other. Instead, context matters:
- In tropical forests, sparing may best protect endemic species.
- In temperate mosaics and mixed-use rural landscapes, sharing through agroecology may optimize both biodiversity and ecosystem service provision.
A productive synthesis emerges when core natural areas are embedded in agroecological matrices, governed by adaptive institutions that balance yield, equity, and ecological function. This integration suggests that landscapes can function as nested ecosystems in which human-managed lands actively sustain regional biodiversity through habitat connectivity, nutrient cycling, and microclimate regulation.
In this light, new evidence from archaeology and paleoecology profoundly reshapes how we understand the boundary between “natural” and “managed” landscapes. Research in the Amazon Basin (e.g., Levis et al., 2017; Clement et al., 2015) shows that vast portions of what had been considered pristine rainforest were in fact anthropogenic mosaics shaped by Indigenous land stewardship thousands of years ago. Forest composition and soil fertility (notably, Amazonian dark earths or terra preta) were influenced by selective planting, controlled burns, and agroforestry systems that enriched biodiversity while sustaining food production. Similar patterns have been identified in North America, where Indigenous peoples managed forest–prairie ecotones, aquatic systems, and wild rice ecosystems around the Great Lakes region through controlled fire, seed dispersal, and aquatic plant cultivation. Similar stories emerge in Australia, where scholars such as Bill Gammage (2011) in The Biggest Estate on Earth revealed that pre-colonial Aboriginal fire management shaped entire continental ecosystems into biodiverse mosaics optimized for both foraging and hunting. Comparable patterns are evident in southern Africa, the Sahel, and much of Asia, where human landscape management long maintained species diversity and ecological balance before being disrupted by colonial land regimes. For centuries, European settlers misread these landscapes as ‘wild’ precisely because they could not imagine large-scale, intentional ecological design. Yet evben in Central Europe, for example, traditional orchard meadows were established after centuries of warfare and famine as a food security measure, but they later evolved into biodiversity hotspots. This case demonstrates how Western land-use policies have at times produced high-value habitats accidentally (Hammel and Arnold, 2012), echoing intentional Indigenous landscape stewardship elsewhere. As Robin Wall Kimmerer (2013) observes, nowadays, students in environmental science continue to struggle to imagine that humans can have beneficial and reciprocal impacts on landscapes—an ingrained bias rooted in Western separation of humans from nature, that conservation and agriculture are separate spheres.
Rather than a dualism of untouched nature versus human-modified land, both the Amazon, Australia, and Great Lakes examples illustrate long-term co-creation between humans and ecosystems. This reframing aligns closely with the agroecological worldview: landscapes can remain biodiverse and productive when management is guided by reciprocity, ecological knowledge, and continuity of care. In this sense, Indigenous landscape engineering provides ancient precedents all around the globe for modern land sharing ideals, demonstrating that human presence can enhance, rather than diminish, ecological integrity.
Conclusions and Implications for Agroecology
Beyond the question of biofuels, the historical (often beneficial) role of human land use must be recognized as a driving force in the co-evolution of species and landscapes. Many species that define today’s ecosystems emerged or persisted because of human practices such as fire regimes, seed dispersal, and grazing management. Understanding this co-evolutionary history reshapes how we think about conservation—it is not about returning to a pre-human baseline but about maintaining (or re-establishing) dynamic relationships that sustain biodiversity and culture alike.
A second implication concerns education. Future land managers, conservation scientists, policymakers, and eaters must be trained to see humans as capable of positive ecological influence. Teaching the history of societies that idealize landscape stewards—managing for both human and natural prosperity—helps to dismantle the lingering myth that conservation means human absence. Integrating these histories into environmental science education can restore imagination and humility in conservation thinking.
Finally, conservation must redefine its role—from fencing out people to empowering context-aware stewards. Modern conservation should focus on helping establish co-management systems that enable local and Indigenous land managers to protect biodiversity while sustaining livelihoods. Successful examples include Australia’s Indigenous Protected Areas, where Aboriginal ranger programs manage fire and invasive species using traditional practices, and Canada’s Indigenous Guardians programs, which combine Indigenous governance with modern monitoring tools. Similarly, in parts of East Africa and the Amazon, community-based conservation areas have achieved measurable gains in biodiversity and social well-being through shared authority. These models illustrate that co-management, not exclusion, represents the future of conservation.
This reframing ties directly to the land sharing–sparing debate: true ecological balance depends not on choosing between people and nature but on cultivating systems where both thrive together through shared stewardship.
References
Augustiny, E., et al. (2025). Empirical evidence supports neither land sparing nor land sharing. PNAS Nexus.
Balmford, A., Green, R. E., & Phalan, B. (2012). What conservationists need to know about farming. Proceedings of the Royal Society B, 279(1739), 2714-2724.
Clement, C. R., Denevan, W. M., Heckenberger, M. J., Junqueira, A. B., Neves, E. G., Teixeira, W. G., & Woods, W. I. (2015). The domestication of Amazonia before European conquest. Proceedings of the Royal Society B, 282(1812), 20150813.
Fischer, J., et al. (2014). Land sparing versus land sharing: Moving forward. Conservation Letters, 7(3), 149–157.
Hammel, Kristine, and Thorsten Arnold. “Understanding the loss of traditional agricultural systems: A case study of orchard meadows in Germany.” Journal of Agriculture, Food Systems, and Community Development 2, no. 4 (2012): 119-136.
Kremen, C. (2015). Reframing the land-sparing/land-sharing debate for biodiversity conservation. Annals of the New York Academy of Sciences, 1355(1), 52-76.
Law, E. A., et al. (2015). Better land-use allocation outperforms land sparing and sharing approaches. Biological Conservation, 190, 162–171.
Levis, C., et al. (2017). Persistent effects of pre-Columbian plant domestication on Amazonian forest composition. Science, 355(6328), 925–929.
Mertz, O., et al. (2017). Land sparing/sharing policies in developing countries. World Development, 99, 29–40.
Oliveira-Xavier, A., et al. (2025). The land-blending strategy: Integrating sparing and sharing for sustainable landscapes. Land Use Policy, 136.
Perfecto, I., & Vandermeer, J. (2010). The agroecological matrix as alternative to the land-sparing/agriculture intensification model. PNAS, 107(13), 5786–5791.
Phalan, B., et al. (2011). Reconciling food production and biodiversity conservation: Land sharing and land sparing compared. Science, 333(6047), 1289–1291.
Sidemo-Holm, W., et al. (2021). What outcomes are compared in land sparing and sharing studies? Conservation Science and Practice, 3(7), e404.
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