Climate adaptation in Nigeria has largely focused on engineered solutions such as drainage systems, dams, and coastal defences. While essential, these alone cannot address the full scale of climate risk. Nature-Based Solutions (NbS), which protect, restore, and sustainably manage ecosystems, offer a cost-effective and resilient complement. This article explores how investing in nature can strengthen Nigeria's climate resilience while advancing sustainable economic development.
Introduction
Nigeria is increasingly experiencing the impacts of climate change. Across the country, communities face recurrent flooding, drought, desertification, coastal erosion, heat stress, biodiversity loss, and declining agricultural productivity. These challenges threaten livelihoods, infrastructure, food systems, public health, and economic development.
The devastating floods of recent years have highlighted the growing vulnerability of communities and infrastructure to climate-related disasters. The 2022 floods alone displaced over 2.4 million people, killed more than 600, and damaged over 676,000 hectares of farmland across the country. At the same time, northern states continue to grapple with land degradation and desertification, with recent assessments finding that as much as 60% of land in some frontline states is severely vulnerable to desertification, while coastal communities in the Niger Delta face erosion, saltwater intrusion, and ecosystem decline, including the loss of over 2,500 km² of mangrove cover since 1988. As climate risks intensify, the need for effective and sustainable adaptation strategies becomes increasingly urgent.
Much of the climate adaptation conversation in Nigeria has focused on engineered solutions such as drainage systems, dams, embankments, and coastal defenses. While these investments remain important, they alone cannot address the scale and complexity of climate-related challenges. There is growing recognition that ecosystems themselves play a critical role in protecting communities from climate impacts.
Nature-Based Solutions (NbS) offer an opportunity to strengthen climate resilience by protecting, restoring, and sustainably managing ecosystems that provide essential environmental, social, and economic benefits.
The International Union for Conservation of Nature (IUCN) defines NbS as actions to protect, sustainably manage, and restore natural or modified ecosystems in ways that address societal challenges effectively and adaptively, while simultaneously providing human well-being and biodiversity benefits. For Nigeria, investing in nature is not simply an environmental objective; it is a climate resilience strategy, a food security strategy, and a development strategy.
Nigeria's Climate Resilience Challenge
Nigeria's climate vulnerability reflects both environmental and socioeconomic realities. The country is highly dependent on climate-sensitive sectors such as agriculture, forestry, fisheries, and natural resource-based livelihoods. Millions of Nigerians rely directly on ecosystem services for income, food production, water supply, and energy.
Changes in rainfall patterns have contributed to more frequent and severe flooding in many parts of the country. Over the past two decades, annual floods in Nigeria have caused the loss of over 1,700 lives and close to $1 billion in property damage. Flood events increasingly affect urban and rural communities, damaging homes, roads, schools, healthcare facilities, and agricultural lands. A national impact assessment of the 2022 floods found that 64% of surveyed households were affected, with rural households (74%) impacted more severely than urban ones (40%), and only about 8% of affected households receiving any form of assistance. The economic costs associated with flood recovery continue to rise.
In northern Nigeria, prolonged droughts, declining vegetation cover, and unsustainable land-use practices contribute to land degradation and desertification. Studies of the frontline states estimate that around half of the soil landscape has experienced degradation, with a significant share classified as highly sensitive to further decline. These conditions reduce agricultural productivity and increase pressure on already vulnerable communities.
Coastal regions face additional risks. Sea level rise, coastal erosion, and mangrove degradation threaten settlements, infrastructure, fisheries, and local economies throughout the Niger Delta region. Remote sensing analysis of the Niger Delta, Africa's largest mangrove ecosystem, found mangrove cover retreating landward at an average rate of over 13 meters per year between 1988 and 2023, driven largely by oil-related pollution and urban expansion.
These challenges are often addressed individually. However, many of them share a common underlying factor: the degradation of ecosystems that naturally help regulate water, stabilise soils, moderate temperatures, protect coastlines, and support livelihoods.
Why Nature-Based Solutions Matter for Nigeria
Healthy ecosystems perform functions that are essential for climate resilience. Forests regulate water flows, improve soil stability, and reduce erosion. Wetlands absorb and store excess water during flood events, functioning as natural sponges that reduce downstream flood peaks and lower erosion. Mangroves protect coastlines from storm surges and erosion while supporting fisheries and carbon storage. Trees in agricultural landscapes improve soil health and increase resilience to drought. When these ecosystems are degraded, communities lose valuable natural protections and become more vulnerable to climate-related hazards.
Nature-Based Solutions recognise that ecosystem restoration and conservation can serve as practical investments in resilience. Unlike many conventional adaptation measures, NbS often generate multiple benefits simultaneously. A restored watershed may reduce flooding, improve water quality, support biodiversity, enhance agricultural productivity, and increase carbon storage.
This ability to address multiple development challenges at once makes Nature-Based Solutions particularly relevant in a country where climate adaptation, food security, poverty reduction, and environmental sustainability are deeply interconnected.
Forest Landscape Restoration as a Climate Resilience Strategy
Deforestation and forest degradation remain significant environmental challenges across Nigeria. Nigeria lost over 463,000 hectares of forest land between 2000 and 2010 alone, much of it converted to shrub, grassland, and cropland. Forest loss reduces biodiversity, weakens watershed functions, accelerates soil erosion, and diminishes ecosystem resilience. Forest landscape restoration offers an opportunity to reverse these trends while strengthening climate adaptation efforts.
In recognition of the need to restore degraded landscapes and strengthen ecosystem resilience, Nigeria committed to restoring 4 million hectares of degraded land and forest by 2030 under the African Forest Landscape Restoration Initiative (AFR100) and the Bonn Challenge, global restoration initiatives that encourage participating countries to make voluntary commitments to restore degraded and deforested landscapes.
Through these commitments, member countries are expected to develop and implement national restoration strategies, promote sustainable land management, mobilise public and private investment, engage local communities, and monitor restoration progress toward their pledged targets. Restoration efforts can also generate economic benefits through sustainable forest management, non-timber forest products, employment opportunities, and improved ecosystem services.
The gap between that pledge and what has actually been implemented illustrates why forest landscape restoration cannot be treated as a one-time commitment. One year after signing on to AFR100, Nigeria reported bringing roughly 900 hectares into restoration nationally; more recent country reporting places cumulative restoration under the Presidential tree-planting initiative at just over 8,500 hectares. Set against a 4-million-hectare target, this represents a fraction of one per cent of the commitment achieved roughly midway to the 2030 deadline. This is not unique to Nigeria. AFR100 as a whole has struggled to convert pledges into tracked, on-the-ground implementation across its member countries, but it means that restoration commitments in Nigeria should be read as a starting point for sustained investment and monitoring, not as evidence that the work is already underway at scale.
For regions experiencing land degradation and declining ecosystem productivity, forest restoration represents both an environmental and economic investment, provided that pledged hectares are matched by financing, monitoring, and institutional follow-through.
Agroforestry and Climate-Smart Agricultural Systems
Among the most promising Nature-Based Solutions available to Nigeria is agroforestry. Agroforestry integrates trees with crops and livestock systems to create more productive and resilient agricultural landscapes. Trees improve soil fertility through nutrient cycling, reduce erosion, increase water infiltration, moderate temperatures, and provide additional sources of food, fuelwood, fodder, and income.
For smallholder farmers facing increasing climate uncertainty, agroforestry can reduce vulnerability to drought and extreme weather while improving long-term productivity through more efficient water use, improved microclimate, and enhanced soil productivity. Beyond adaptation benefits, agroforestry contributes to climate mitigation through carbon sequestration and helps diversify household livelihoods. Given the importance of agriculture to Nigeria's economy, expanding agroforestry adoption could significantly strengthen national climate resilience.
Wetland Conservation and Flood Resilience
Flooding continues to impose substantial social and economic costs across Nigeria. Yet many of the ecosystems that naturally help manage floodwaters have been degraded or converted for other uses. Examples include freshwater wetlands, river floodplains, riparian forests, mangrove forests of the Niger Delta, and natural grasslands, all of which help store floodwaters, slow runoff, and reduce downstream flooding while supporting biodiversity and improving water quality.
Wetlands function as natural flood control systems by absorbing, storing, and gradually releasing excess water; in watersheds where wetlands have been lost, flood peaks can increase by as much as 80%. They reduce peak flood flows, improve water quality, and support biodiversity.
Nigeria's own Hadejia-Nguru wetlands, a Ramsar-designated floodplain in the northeast spanning some 58,100 hectares, illustrate both the value of these systems and the cost of losing them. The wetlands support roughly 6% of Nigeria's inland freshwater fish catch and an estimated $75 million in agricultural output each year, while hosting between 200,000 and 325,000 waterbirds. Upstream dam construction, principally the Tiga and Challawa Gorge dams, built to supply irrigation, has cut seasonal flooding into the wetlands by an estimated 350 km², and fish diversity in the area has fallen to about 42% of pre-dam levels.
A joint conservation project involving the Nigerian Conservation Foundation, IUCN, and BirdLife International has worked since 1985 to manage the resulting trade-offs between upstream water use and downstream wetland function, with mixed and still-contested results. The case shows that wetland loss in Nigeria is rarely accidental; it is often the by-product of infrastructure decisions made without accounting for the flood-control and livelihood value the wetland was providing.
Protecting and restoring wetlands should therefore be viewed as an integral component of flood management policy, not an afterthought. Investments in wetland conservation can complement traditional infrastructure while providing long-term environmental benefits, as demonstrated in other flood-prone river basins like the Yangtze River basin in China, where large-scale wetland restoration has significantly increased floodwater retention capacity.
As Nigeria seeks to strengthen disaster risk reduction efforts, wetland restoration deserves greater attention as a cost-effective resilience strategy, and future water infrastructure planning should weigh downstream wetland impacts explicitly rather than treating them as an externality.
Mangrove Restoration in the Niger Delta
Nigeria possesses one of Africa's largest mangrove ecosystems, yet significant portions have been degraded by pollution, land conversion, and unsustainable resource use. Mangroves provide critical protection against coastal erosion, storm surges, and flooding. They support fisheries, store large quantities of carbon, and sustain local livelihoods. In the Ogoniland area alone, an estimated 1,000 hectares of mangroves were degraded following major oil spills, wiping out most of the local intertidal fauna that communities depended on for food. Community-led restoration efforts, such as those undertaken by women's groups in Ogoniland, have since shown that mangrove replanting can help restore both ecosystems and livelihoods.
Restoring mangrove ecosystems in the Niger Delta would strengthen coastal resilience by reducing coastal erosion, attenuating storm surges, and mitigating flooding while generating additional benefits for biodiversity conservation, fisheries productivity, carbon sequestration, and climate change mitigation. These co-benefits make mangrove restoration one of the most effective nature-based solutions for enhancing climate resilience in vulnerable coastal regions. Given increasing climate risks in coastal areas, mangrove restoration should be considered a national adaptation priority.
Urban Green Infrastructure and Climate Resilience
Climate resilience is often discussed in rural contexts, but urban areas face growing climate challenges as well. Rapid urbanisation has reduced green space in many Nigerian cities, contributing to higher temperatures, increased flood risk, and declining environmental quality. Pilot studies in Lagos have recorded surface cooling of over 4°C and a 27% reduction in stormwater runoff where green infrastructure has been introduced.
Urban forests, parks, green corridors, rain gardens, and other forms of green infrastructure can help reduce urban heat, improve stormwater management, enhance air quality, and improve public health outcomes. As Nigerian cities continue to grow, integrating Nature-Based Solutions into urban planning will become increasingly important.
Barriers to Scaling Nature-Based Solutions
Despite their potential, NbS remain significantly underutilised in Nigeria, and the gap is not primarily one of concept or willingness; it is a gap in implementation.
The AFR100 forest restoration pledge described earlier is a useful illustration of a broader pattern: Nigeria has repeatedly made credible, well-publicised commitments to ecosystem restoration, only for on-the-ground delivery to fall far short. The same pattern shows up in the Hadejia-Nguru wetlands, where decades of internationally supported conservation work have coexisted with continued upstream dam-driven degradation, because the agencies managing water infrastructure and the agencies managing wetland conservation have not been forced to plan jointly. These are not failures of awareness; they are failures of coordination, financing, and follow-through.
Despite the absence of a standalone national NbS policy, analyses of Nigeria's environmental and climate policy frameworks identify several recurring barriers to NbS implementation, including improper agenda-setting that keeps ecosystem restoration outside core national planning processes, a lack of economic valuation of ecosystem services, and weak strategic leadership needed to coordinate and monitor NbS efforts over the long term.
In practice, this shows up as fragmented mandates; forestry, water resources, agriculture, and environment are typically handled by different federal and state agencies with limited incentive or mechanism to coordinate, so a wetland restoration effort can be undermined by a dam project approved elsewhere in government, or a mangrove replanting initiative can be undercut by unregulated oil infrastructure a few kilometres away.
Financing is a related and compounding constraint. Restoration projects in Nigeria are frequently designed and funded as short-term, donor- or NGO-supported pilots rather than being built into recurring national or state budgets, which means that even where implementation starts strong, it often stalls once initial funding cycles end, a pattern visible in the slow pace of AFR100 hectare delivery relative to the pledge.
Across Sub-Saharan Africa more broadly, funding alone has proven insufficient; governments and project developers must also address policy, institutional, technical, social, and financial barriers, alongside land tenure and rights issues, for NbS projects to succeed at scale. Land tenure in particular complicates restoration in Nigeria, where unclear or contested rights over degraded land, floodplains, and coastal areas can make it difficult to establish who is responsible for, and who benefits from, long-term ecosystem management.
Addressing these barriers will require more than stronger rhetoric about the value of ecosystems. It requires converting restoration pledges into monitored, budgeted, multi-year programs; giving environmental agencies real authority over infrastructure decisions that affect the ecosystems they are meant to protect; and building financing mechanisms that outlast individual donor projects or political administrations.
Policy Priorities for Mainstreaming Nature-Based Solutions
Nature-Based Solutions should be integrated into national climate adaptation policies, disaster risk reduction frameworks, agricultural development strategies, and land-use planning processes. Nigeria has already signalled its commitment to this approach through its Nationally Determined Contribution (NDC); the country's climate action plan under the Paris Agreement, which identifies NbS, including sustainable land management, afforestation, reforestation, and ecosystem restoration, as important measures for reducing emissions from agriculture, forestry, and other land uses while strengthening climate resilience.
Government agencies should increase financial and institutional investments in ecosystem restoration and support community-led conservation initiatives. Agricultural programs should promote agroforestry and sustainable land management practices. Urban planning policies should incorporate green infrastructure. Financing mechanisms should be expanded to support restoration projects and ecosystem-based adaptation initiatives.
Most importantly, NbS should be recognised not as environmental projects, but as core investments in national resilience and sustainable development.
Conclusion
Nigeria's climate future will depend not only on technological innovation and infrastructure development but also on the health and resilience of its ecosystems.
Forests, wetlands, mangroves, agricultural landscapes, and urban green spaces provide services that are fundamental to climate adaptation and community resilience. Protecting and restoring these ecosystems offers an opportunity to address multiple development challenges simultaneously while strengthening the country's capacity to withstand future climate shocks.
NbS are not a substitute for conventional adaptation measures. However, they represent one of the most cost-effective and sustainable tools available to Nigeria for building long-term climate resilience. Investing in nature is ultimately an investment in the resilience of communities, the strength of the economy, and the sustainability of future development.
Author
Grace Dominic / Climate Policy Analyst / Contact