"Miyawaki" has become a ubiquitous buzzword in recent years, especially in urban greening, reforestation, and environmental restoration. The term has gained widespread popularity because of its association with creating dense, and “so-called” biodiverse forests with native trees in a relatively short period.
Background of the Miyawaki Method:
The Miyawaki method was developed by Dr. Akira Miyawaki, a Japanese botanist, and is said to be a technique for creating dense, native forests. The method involves planting a wide variety of native species, often many more than traditional plantations, and using organic techniques to ensure rapid growth and biodiversity. This technique is based on the principles of how natural forests grow, with trees competing for sunlight, water, and nutrients in a natural way, resulting in a dense and biodiverse ecosystem in a short period.
Origin of Miyawaki forest in India:
The Miyawaki method of afforestation was introduced to India with the establishment of a pilot project at the Toyota Kirloskar Motor (TKM) plant in Bidadi, Bengaluru, Karnataka, in 2009 by the Japanese Management of Toyota.
Attractive promise of quick solutions:
As we know, the whole world is increasingly concerned about climate change, biodiversity loss, and urban pollution, the Miyawaki method offers a quick fix—the promise of creating dense, diverse forests in a very short span of time (often within 3-5 years). This is an attractive proposition for governments, businesses, and urban planners who are looking for rapid, visible results.
It promises to reclaim urban spaces, mitigate air pollution, and create carbon sinks without the lengthy timeline and complexity of natural reforestation processes, making it highly appealing for cities under environmental stress.
Simplicity and Replicability:
The Miyawaki method is presented as a straightforward solution that can be applied in various urban environments, from small vacant lots to larger urban parks. Its simplicity—based on planting native species to mimic a natural forest structure—makes it seem like an easily replicable solution. This simplicity lends itself well to scalability and widespread adoption.
Effective Marketing and Publicity:
The Miyawaki method has been heavily promoted by environmental organizations, urban planners, and even businesses as a solution to multiple environmental challenges, such as deforestation, urban heat islands, air pollution, and biodiversity loss. This marketing has played a large role in making the term "Miyawaki" a household name, especially in urban areas where people looking for quick, visible green solutions.
Media coverage:
From news outlets to social media influencers, the media has helped popularize the method, showcasing how small urban spaces can be transformed into lush, forested areas almost overnight. These false success stories have helped solidify Miyawaki as a desirable, innovative solution to environmental problems.
Can the Miyawaki forest be called a forest?
The term ‘forest’ in the Miyawaki method is itself misleading, especially when we consider the traditional ecological definition of a forest. A forest is typically a complex, layered ecosystem that includes not only trees but also a variety of other life forms/habits such as herbaceous plants, under-shrubs, shrubs, climbers, twiners, climbing-shrubs, terrestrial and epiphytic ferns, terrestrial and epiphytic orchids, and so on. Aquatic and wetland ecosystems are also integral to many natural forests and ecosystems. But no Miyawaki forest has included such life-forms, and habitations, or ecosystems. Hence, the Miywaki forest no longer be called a forest.
Oversimplification and Unrealistic Expectations:
The idea that one can create a forest in just a few years has led to unrealistic expectations about the long-term sustainability of these forests. While the Miyawaki method accelerates growth, it doesn’t automatically guarantee that these forests will become fully functional, self-sustaining ecosystems without significant long-term management.
Critics argue that many urban greening projects might focus on the immediate visual impact rather than addressing deeper ecological needs, such as soil regeneration , wildlife habitat, or nutrient cycling.
Lack of ecological and contextual sensitivity :
While the Miyawaki method promotes the planting of native species, it may not always be sensitive to the specific ecological needs of the local environment. For instance, dense planting of trees in the wrong location or without consideration of local biodiversity, soil quality, or microclimates can create problems such as overcrowding, soil depletion, or the introduction of invasive species.
Ignoring Larger Systemic Issues :
The popularity of Miyawaki forests detracts from the broader systemic issues that need to be addressed, such as urban sprawl, overconsumption, and unsustainable land use practices, in the name of super-fast solutions, such as creating mini-forests.
Furthermore, the focus on small-scale urban greening has led to the belief that planting trees in cities is enough to reverse deforestation or habitat destruction. This attitude is alarmingly growing among the next generation, ignoring in reality the solutions require large-scale, comprehensive actions that involve protecting natural ecosystems, reducing emissions, and reducing land-use pressure on remaining forests.
Tree planting is viewed as a simple, one-size-fits-all solution but should be part of a broader strategy for landscape restoration and environmental conservation. The idea that “planting trees will solve everything” is misleading.
Commercialization and "Greenwashing" :
With the rising popularity of the term, started feeling the risk that corporations or organizations adopt the Miyawaki method simply for marketing purposes, rather than committing to genuine ecological restoration. This has resulted in “greenwashing”, where companies plant trees just to enhance their public image without genuinely addressing the underlying environmental issues or making meaningful, sustained contributions to ecological health.
Lack of knowledge:
I have visited many Miyawaki plantations in India. Many people working in creating Miyawaki forests might have never had the opportunity to experience a natural forest firsthand. Without that immersive experience, it’s hard to fully grasp the nuanced complexities of how a healthy forest or ecosystem functions, or how humans can interact with nature in a way that supports rather than disrupts its balance.
It’s deeply concerning when valuable microhabitats, like rocky areas and marshy zones, are removed or altered in the name of land development or large-scale planting initiatives. The planners and implementors of the plantations do not know the seemingly "small" or less glamorous ecosystems that often play an outsized role in supporting biodiversity and ecological functions.
Rocky habitats provide essential microhabitats for a variety of organisms, including lichen, mosses, small plants, and invertebrates. They also offer shelter and nesting spaces for small mammals, reptiles, and birds. The gaps between rocks or crevices often serve as cool refuges for species during extreme temperatures. Removing rocky areas can lead to the loss of these specialized niches and disrupt the unique species adapted to survive in these environments. This leads to a significant decline in biodiversity. Rocks also influences local water drainage and soil composition. Without them, there can be an increased risk of soil erosion or altered water flow patterns.
Wetlands and marshes are some of the most biodiverse ecosystems on Mother Earth, supporting a wide variety of plant and animal species, including migratory birds, amphibians, and aquatic life. They also provide crucial ecosystem services like water filtration, flood control, and carbon sequestration.
In the name of dense planting, marshy areas are leveled or drained, and hence these important functions are disrupted. Wetlands besides providing drinking water to the wild as well as domestic animals, also act as natural sponges, absorbing excess water during floods, filtering out pollutants, and providing breeding grounds for many species. Their destruction can exacerbate flooding, reduce water quality, and accelerate the loss of biodiversity. Wetlands also store large amounts of carbon in their soil and draining or degrading them can release this stored carbon, contributing to climate change.
In many large-scale tree-planting projects, there’s often a narrow focus on the immediate goal of creating forests or green spaces, but this can inadvertently overlook the critical importance of preserving existing ecosystems.
It’s not just about planting any native species but understanding which species are appropriate for specific regions, climates, and ecological niches is a prerequisite. Lack of such deep ecological understanding results in mismatches in species composition and eventually failure to attract essential pollinators or soil organisms.
Non-native and invasive species are often chosen for their fast growth and aesthetic appeal, but these species can have serious consequences for the local ecosystem. I am witnessing invasive species have been heavily planted in the name of “mini-forests” such as Conocarpus lancifolius, Glyricidia glabra, Samanea saman, Spathodea campanulata, Tabebuia argentea, Tabebuia rosea, Jacaranda mimosifolia, Grevillea robusta, Lantana camara, Tecoma stans, Terminalia catappa, Couroupita guianensis, Simarouba glauca, Pithecellobium dulce, Hamelia patens, Senna siamea are a few to be mentioned. The use of these non-native or invasive species in Miyawaki plantations is of concern for several reasons. The following are their relevance in the context of ecological balance.
1. Conocarpus lancifolius (Damas tree/ Charcoal tree)
2. Glyricidia glabra (Gliricidia)
3. Samanea saman (Rain Tree)
4. Spathodea campanulata (African Tulip Tree)
5. Tabebuia argentea (Silver Trumpet Tree)
6. Tabebuia rosea (Pink Trumpet Tree)
7. Jacaranda mimosifolia (Jacaranda)
8. Senna siamea (Yellow Cassia)
9. Grevillea robusta (Silk Oak)
10. Lantana camara (Lantana)
11. Tecoma stans (Yellow Bells)
13. Couroupita guianensis (Cannonball Tree)
14. Simarouba glauca (Lakshmi Taru)
15. Pithecellobium dulce (Jungle Jalebi)
16. Hamelia patens (Firebush)
One of the core principles of the Miyawaki method is to plant native species that are adapted to the local climate, soil, and ecosystem. The inclusion of non-native species has further diluted this method in restoring local biodiversity. Non-native species often don’t have natural predators or competitors in their new environments, allowing them to thrive and potentially harm native ecosystems. Nevertheless, native pollinators in the absence of native plants, pollinate and multiply these invasive species, hence these non-native species get double-dhamaka. In the absence of native plants, local pollinators turn to invasive species for sustenance. Observing bees and butterflies flocking to the flowers of these invaders, pseudo-environmentalists often label them as “bee- and butterfly-friendly” and further promote these invasive species in the landscaping and home gardens through their networks. This is another alarming scenario for the native biodiversity.
Improper planting techniques:
The involvement of volunteers in Miyawaki plantations presents another significant challenge. While the enthusiasm of volunteers is commendable, many of them lack the necessary orientation and training on what proper planting entails. Often, they perceive the planting as a one-time celebratory event rather than a part of a larger, ongoing process of forest restoration and care. This can result in improper planting techniques, such as incorrect planting depth, inadequate spacing, or insufficient attention to soil and root conditions.
However, this is not to undermine or belittle the effort of the selfless volunteers who are genuinely passionate about contributing to the environment. Their intentions are valuable, and many are dedicated to making a difference. The issue lies not in their commitment but in the lack of adequate training and supervision during the planting process. Without proper guidance, the effectiveness of their contribution be diminished, and the long-term success of the plantation be compromised.
Harming existing forests/ ecosystems
It’s unfortunate when efforts to restore ecosystems or plant trees, like Miyawaki plantations, inadvertently lead to the destruction of existing natural habitats. If the intention behind the Miyawaki method is to promote biodiversity and create dense, native forests quickly, but this is done at the expense of already thriving ecosystems, causing harm to the local flora and fauna.
The Miyawaki method focuses on planting a diverse set of native species to restore the balance in ecosystems, but it’s crucial to assess the impact of these projects on existing habitats first. In many cases, natural habitats—like grasslands, wetlands, or mature forests—offer irreplaceable biodiversity and ecosystem services that are hard to replicate.
When large-scale planting efforts disregard existing ecosystems, they may inadvertently displace local species, disrupt ecological processes, or even alter soil and water systems. This is why it's important to approach restoration and conservation with a more holistic view that ensures the preservation of natural habitats while promoting biodiversity in a way that doesn’t harm the delicate balance of existing ecosystems.
In essence, it’s a delicate balance between restoration, conservation, and respect for the existing natural environment. Ideally, restoration projects should prioritize complementing and enhancing current ecosystems, not replacing or disrupting them.
The Drive for Profits:
When the primary driver behind tree planting projects is financial gain rather than genuine ecological restoration, the quality and success of these efforts often suffer. Landowners or entrepreneurs are planting fast-growing, non-native species to make a quick profit, without considering the long-term impact on biodiversity, soil health, or the local ecosystem.
With such projects being driven by profit motives, there is a lack of monitoring and maintenance after the initial planting phase. As a result, trees are perishing, carbon sequestration not occurring as promised, and the money invested in the projects ends up being wasted.
Space is freedom for Plants:
Just as animals need room to roam, plants require space to spread their roots, stretch their branches, and thrive. It is nature’s freedom! When plants, especially large trees, are confined to a small area, their growth becomes stunted, and they struggle to access the nutrients, water, and sunlight they need to prosper. It is distressing to see towering trees packed tightly together in urban spaces, where they often have to compete for limited resources. It's disheartening to see 20-year-old trees like Terminalia arjuna (Arjun tree, known for its huge trunk and canopy) planted in Miyawaki forests struggling to survive and remain stunted to the size of a sugar cane.
Shallow Root Systems:
A very important issue related to the planting techniques used in Miyawaki forests, particularly the practice of planting trees on created mounds enriched with fertilizers and growth promoters. The mounds are designed to provide quick nutrients to newly planted trees and help them establish quickly, but the roots tend to stay within this enriched, loose soil layer. Over time, trees do not develop deep, anchoring root systems, which means they are more vulnerable to wind, drought, and nutrient depletion.
As the trees mature, their shallow roots begin to spread out. In a dense forest like those created by the Miyawaki method, where multiple species are planted closely together, the roots often grow into each other's space, leading to competition for water and nutrients. This results in most of the trees becoming stunted or even dying while the competition becomes too fierce. It is also observed that fast-growing species like Ficus benghalensis (Banyan), Ficus religiosa (Pupal), Ficus racemosa (The Indian Fig) trees overgrow and overshadow other trees and also exhibit strong antagonism.
Nutrient Imbalance:
The reliance on fertilizers and growth promoters creates an unnatural nutrient balance in the soil. While it helps trees grow rapidly in the short term, the long-term effect is that the soil becomes less fertile. Over time, trees find it harder to extract nutrients from the soil, especially once the initial nutrient boost from the mounds diminishes.
Root Exposure:
As the trees age, their shallow roots begin to protrude above the soil surface, especially when the mound starts to erode or compact. This not only makes the trees more vulnerable to environmental stresses but also interferes with the aesthetic of the forest.
No phenological status:
There is scarce or no flowering and fruiting observed in Miyawaki forests. One of the main reasons for the scarcity of flowering and fruiting in a Miyawaki forest is that dense planting leads to intense competition for sunlight. Many plants in these forests, especially those in the lower layers, receive insufficient sunlight that do not trigger their flowering and fruiting. Sunlight is a critical factor for plants to produce flowers and fruits, particularly for species that are adapted to full sun or partial sun.
Phenological data help us understand how species in a forest interact with each other and with their environment. Many ecological processes, such as plant-pollinator relationships, seed dispersal, etc. are driven by the timing of phenological events.
Dense Planting Sequesters More Carbon? Here's Why That's a Myth!
I've been noticing very dense plantings of Melia composita being promoted for carbon sequestration. However, these trees grow very thin and don't develop a full canopy or trunk. In this scenario, I believe a single tree allowed to grow to its full potential would have more biomass than 1000 densely planted trees in the same area. Similarly, the carbon sequestration of the former would surpass that of the latter. This applies to the Miyawaki plantation too!
Tree Density vs. Individual Tree Growth: When we compare a dense Miyawaki plantation to a single, fully grown tree (for instance, 100 trees in a dense plantation against 10 trees in a less dense plantation), the latter will likely store more carbon over time. One needs to understand that the biomass of a tree and its carbon sequestration are directly proportional. Here's why:
Biomass and Carbon Storage: Biomass refers to the total mass of all living matter in a tree, including leaves, stems, branches, and roots. A significant portion of this biomass is carbon. Trees absorb carbon dioxide (CO₂) from the atmosphere during photosynthesis, converting it into organic compounds (like carbohydrates), which make up their biomass. Therefore, the more biomass a tree has, the more carbon it is likely to store.
Carbon Sequestration: Carbon sequestration refers to the process of capturing and storing carbon from the atmosphere. Trees sequester carbon by storing it in their tissues. Larger trees (with more biomass) generally have greater carbon storage potential because they accumulate more carbon in their trunks, branches, leaves, and roots.
Proportional Relationship: As trees grow and accumulate more biomass, they capture and store more carbon. However, the exact relationship may not always be perfectly linear due to factors such as tree species, age, and environmental conditions. Younger, fast-growing trees might sequester carbon more rapidly than older, slower-growing ones, even if the older tree has more total biomass.
The Miyawaki method is a technique for creating dense, native forests in a short amount of time. It focuses on planting a large number of trees very close together, with the idea that they will compete for light and space, which accelerates their growth initially. These forests can indeed grow rapidly in the first few years because of the dense planting, but this rapid growth does eventually slow down after a few years, especially as trees begin to mature and compete for limited resources like light and nutrients.
Rapid Growth Phase: During the early years, the trees grow quickly, sequestering a substantial amount of carbon in their biomass. However, because these trees are planted densely and are relatively small in size compared to mature, fully grown trees, they might not be able to store as much carbon overall compared to larger, older trees.
Slower Growth Phase: As trees in a Miyawaki forest mature and begin to compete more heavily, growth slows down, and biomass accumulation levels off. The dense planting means that they may not achieve the same trunk size or canopy volume as a solitary tree of the same species growing in less crowded conditions.
It is to be understood that in a Miyawaki forest, trees are planted nearby and often do not reach the same size as those in a traditional, non-dense forest, especially as they mature and growth slows. While they may sequester carbon rapidly in the early stages, the overall biomass may be less in the long term, simply because the trees are not allowed to fully mature and expand.
In the long term, trees allowed to grow to their full potential with larger trunks and expansive canopies will likely sequester more carbon than a denser plantation of smaller trees that don’t reach full maturity.
Resistance by local communities:
The resistance from local communities against the Miyawaki forest method is an important indicator of the method's failure to resonate with the people who are most connected to the land and its natural rhythms. When local communities refer to Miyawaki forests as a ‘sin’ it reveals a deep cultural and ecological disconnect between the top-down, corporate-driven approach of the Miyawaki method and the traditional, community-driven practices that have sustained local ecosystems for generations.
Even the labourers involved in the Miyawaki plantations were opposed to the dense planting of trees. However, they felt powerless and had no choice but to carry out the work. They shared with me that they had asked the implementing agency for more spacing between the plants, but their requests were ignored, and they were just silenced instead.
This resistance is not just a matter of preference; it reflects fundamental concerns that go beyond aesthetic or superficial objections. The opposition from these communities highlights the ecological, social, and cultural issues with promoting an afforestation technique that is largely imposed without adequate consultation or regard for local needs and values.
In conclusion, the Miyawaki method, the high-density and resource-intensive approach is not a sustainable or ecologically appropriate solution for afforestation in India. Given the unique challenges of India’s diverse climates, soil conditions, and water availability, more context-specific and ecosystem-specific approaches, integrating strictly native species, community involvement, and especially local ecological wisdom may prove to be a more successful long-term strategy for environmental restoration and biodiversity conservation.
Given the challenges and limitations associated with the Miyawaki method in the Indian context, the Government of India must reconsider its focus on promoting this technique as a one-size-fits-all solution for afforestation.
I firmly believe that a universal solution for ecosystem restoration is impossible because Nature, or God, has created a vast diversity of landscapes, flora, fauna, and microhabitats across the Earth. Each ecosystem is unique and restoration efforts must be customized to reflect its specific characteristics. This includes considering local species, soil types, water availability, climate conditions, and the social and cultural context of the area.
Effective restoration often requires an understanding of the ecosystem's historical state, how it functioned before significant disturbances, and working towards rebuilding its structure, function, and biodiversity in a way that ensures resilience and adaptability to future changes.
Study the existing ecosystem and prioritize Existing Landscapes and Landscape Elements:
Instead of focusing solely on the rapid growth of trees, afforestation efforts must prioritize the restoration of entire ecosystems. Emphasize the preservation and enhancement of natural features that already exist within the landscape, recognizing their ecological importance.
Focus on developing afforestation strategies tailored to specific regions and climates. For example, plantations in arid regions should focus on drought-resistant species while in wetlands, the focus should be on water-loving plants. The government must promote methods that work with local environmental conditions and encourage local biodiversity, rather than relying on uniform models.
In the case of restoration activities on barren lands, it's essential to study the surrounding areas to gain a deeper understanding of the natural vegetation that should be developed or promoted. The vegetation of neighboring areas provides valuable insights into the types of plant species that are naturally suited to the local soil, climate, and ecological conditions.
In the case of restoring degraded ecosystems, it’s crucial to first study and understand the existing conditions of the ecosystem before taking any action. Restoration efforts must be based on a deep understanding of the ecosystem's current state, as well as its historical baseline, to guide the process effectively.
Here's how this can be approached:
Thoroughly assess the current state of the ecosystem, including soil health, water quality, climate conditions, and the presence or absence of native species. Understanding the causes of degradation—whether due to overuse, pollution, invasive species, climate change, or other factors, is essential for determining the most appropriate restoration strategies.
Reintroduce Key Microhabitats:
Microhabitats such as wetlands, riparian zones, forest understories, or rocky outcrops, often play critical roles in supporting biodiversity. Restoring or creating these small, specialized habitats can provide refuge for native species and help restore ecological processes, such as nutrient cycling, water filtration, and pollination. Identifying and reintroducing the appropriate microhabitats based on the surrounding landscape is key to fostering ecosystem resilience.
Reintroduce Native Flora:
The reintroduction of native plants is a cornerstone of ecosystem restoration. Native plants are adapted to the local environment and help re-establish the original structure of the ecosystem. It’s important to choose plants that were historically present in the area and that fit the local climate, soil, and water conditions. These plants often provide food and shelter for local wildlife, restore soil fertility, and improve water retention.
Monitor and Adapt:
Restoration is an ongoing process. After reintroducing microhabitats, flora, and fauna, it’s important to monitor the ecosystem’s recovery and make necessary adjustments. This may involve further plantings, managing invasive species, or ensuring that ecological processes are functioning as intended.
Say No to Invasive Species:
Actively work to prevent the introduction and spread of invasive species, whether plants, birds, fish, or other organisms that can disrupt local ecosystems and outcompete native species.
Community-driven ecological approaches:
Engage local communities in the plantation process, ensuring that the methods align with traditional knowledge and the needs of local ecosystems. Community participation fosters a sense of ownership and ensures the long-term success of afforestation efforts.
Encourage local communities to value and protect native plants and ecosystems. Promote efforts to give back to the Earth by conserving and preserving ethnic biodiversity, helping to restore the natural heritage for future generations.
Sustainability and Monitoring:
The government must ensure that long-term monitoring systems are in place to track the health of planted forests and the overall ecological impact. Sustainable practices should be integrated into plantation schemes.