Ecological Restoration Science

11 beavers did something in Scotland that scientists’ computers say is impossible. They were brought in to help a dying river. Only modest changes were expected… But instead, something incredible happened: 🌧️ Water retention increased to 60% 🌊 Flood peaks were cut in half 🦌 Biodiversity started spreading in areas that were deemed as irrecoverable. 🐟 Salmon returned 💐 Wildflower meadows were restored 🐞 Dragonflies and frogs and wetland creatures came back It went from a dry, lifeless crack to a spongy vibrant wetland Over 100 dams now step down the Knapdale valleys: each one catching, storing, and gradually releasing water. A self-maintaining flood defense system built from mud and sticks that outperformed decades of concrete engineering. Beavers are the best ecologists and engineers we could ever imagine. The University of Stirling hydrologist put it simply: "Our computer models couldn't reproduce what actually happened." But the results came with trade-offs: Flooded fields, complex compensation systems, and growing tension between ecological restoration and agricultural livelihoods It forced Scotland to confront a harder question: Not whether nature can outperform engineered solutions, but how far society is willing to let it. This is the story of how a handful of animals rewrote centuries of river management, and why restoring nature is never as simple as letting it back in. When will we start implementing more systems designed from nature’s wisdom and less from our limited imagination?

For centuries we’ve tried to control our rivers. Across the UK, rivers were straightened, deepened, and disconnected from their floodplains to drain land, protect infrastructure, and make space for farming. It worked but it also left us with flashier floods, dried-out soils, and habitats cut off from the lifeline of water. For #WorldRiversDay, I'm sharing a sneak preview of our upcoming autumn release: a national dataset comparing OS 1st Edition river courses with the modern OS NGD river network to reveal where those changes happened. 📸 Left: Historic mapping showing meandering channels and wet valley bottoms. 📸 Right: Modern OS NGD river lines overlaid on satellite imagery, showing where channels were straightened. This is the next piece of the puzzle we’re working on - combining our Historic Habitat dataset (which shows where rivers once had marshy, connected floodplains) with national mapping of modified rivers. Together, they can help target restoration where it will deliver the biggest benefits: slowing the flow, reconnecting floodplains, and creating space for wildlife. #CatchmentRestoration #Rivers #NatureRecovery #GIS #AI

It’s not just a pretty picture—there’s a full ecological restoration plan behind it. At Western Sydney University’s Hawkesbury campus, what if we transformed open concrete drains into natural, #NaturePositve waterways. The first photo with the concrete drains is the actual photo. The other AI-generated visuals you see are backed by detailed modelling that factors in climate, soil, hydrology, and vegetation to simulate ecological succession and produce a full restoration blueprint. This isn’t just landscaping—it’s habitat creation with measurable outcomes. For every 100 metres of restored channel, we estimate: 1–2 turtle nesting zones 1–2 frog breeding habitats, supporting species like Limnodynastes and Litoria A 5–10% increase in aquatic and terrestrial macroinvertebrate diversity 10–15 native plant species introduced, boosting structure and pollinator resources Multiple microhabitats created for birds, skinks, dragonflies, and microbats At these levels, there is no increased risk of flooding. These numbers scale up significantly across kilometres of restored urban drains and farm waterways—and we’ve built this to be scalable across the country. #WSUNaturePositive2029 #1MillionTurtles #NaturePositive #WetlandRestoration #TurtleConservation #FrogHabitat #BiodiversityGains #EcologicalEngineering #WSU #AIforNature

Most restoration projects fail long before planting. They fail inside the nursery. We spend weeks debating species lists. Native or not. Numbers or density. And then we source plants from any nursery that can deliver fast. That contradiction quietly decides the fate of the project. Here’s the uncomfortable truth: The same species, grown in different nurseries, behaves like a completely different plant on site. Why nurseries matter more than we admit: 1️⃣ Root architecture is decided early Plants raised too long in polybags develop: Coiled roots Shallow root plates Poor anchorage They may survive planting. They rarely thrive after irrigation reduces. 2️⃣ Speed kills resilience Nurseries optimised for fast turnover: Over-fertilise Over-water Minimise stress The result is plants trained for comfort-not adaptation. 3️⃣ Provenance is ignored A “native species” sourced from far outside its ecological zone is still mismatched. Climate, soil chemistry, and microbial associations matter. Provenance is not a detail. It is a determinant. 4️⃣ Survival at delivery ≠ survival on site Most nurseries optimise for: Green leaves Uniform height Visual health on dispatch day Restoration requires: Root dominance Stress tolerance Slow, balanced growth These are not the same goals. 5️⃣ Nurseries are rarely part of restoration planning They are treated as vendors, not ecological partners. So plant quality becomes a procurement problem, not an ecological one. And then we wonder why: Growth stalls after year one Mortality spikes when irrigation reduces Replanting becomes routine This is not bad luck. This is predictable biology. If we want restoration projects that last beyond reports and handovers, we need to stop asking only what species to plant and start asking how those plants were raised. Because by the time a sapling reaches the site, most of its ecological future is already decided. #EcologicalRestoration #NurseryPractices #NativeSpecies #SoilHealth #PlantQuality #CSR #Sustainability #ImplementationEcology

The cheapest flood defence is one that photosynthesises. That's not a flood warning poster you see at Putney station. It's a fact about wetlands. But wetlands have a branding problem. The word sounds like something you'd avoid on a walk: soggy, muddy, inconvenient… a place for midges and the birdwatchers who brave them. In Britain, forests get attention and funding, yet we've lost around 90% of our wetlands since the 1600s. Here's the reframe: Wetlands are not a "nice-to-have" for nature. They are essential infrastructure for people. Flood defences that grow. Water filters that self-repair. Climate resilience built into the landscape. And if the infrastructure angle doesn't convince you: they're biodiversity powerhouses. 40% of all species rely on freshwater wetlands, despite them covering less than 1% of the world's surface. If we had to replace what wetlands do with concrete and chemicals, the cost would be staggering. Yet when they work properly, we barely notice. That's infrastructure done right. I spent time along the River Frome with Simon Hunter and the team at the Bristol Avon Rivers Trust, watching restoration happen in real time. They're creating wet woodland along the river's edges, reconnecting the floodplain, slowing water during heavy rain, and restoring the natural sponge effect engineered out over decades. Spending time with people like Simon by a river where nature is being given space to return, it's hard not to feel hopeful. Sometimes the most advanced solution isn't new technology. It's letting nature do what it's always done, quietly and brilliantly. What natural infrastructure in your area quietly does the heavy lifting? Happy #WorldWetlandsDay #Wetlands #RiverFrome #NatureRecovery #ClimateResilience #BristolAvonRiversTrust

Getting restoration right Tree planting has become a favored response to environmental loss. Governments, companies, and philanthropies announce large targets with reassuring round numbers. Forests, after all, store carbon, shelter wildlife, and support livelihoods. Yet the details matter. Planting the wrong species, or planting trees where forests did not exist, can undermine both biodiversity & climate goals. That problem has become clearer as restoration pledges have multiplied. A 2019 Nature piece found that nearly half of the area pledged under the Bonn Challenge consisted of plantation-style monocultures. A 2024 study in Science showed that much land promised for reforestation in Africa was actually savanna. Ambition, in other words, has often run ahead of ecological sense. Paul Smith of Botanic Gardens Conservation International, told Ruth Kamnitzer this pattern raised concerns as pledges grew larger. “It started to occur to us that there was potentially a problem here, particularly given the size of the pledges that were being made.” What was missing was a way to distinguish restoration that improved biodiversity from restoration that merely looked good on paper. The Global Biodiversity Standard (TGBS) was created to fill that gap. Officially launched in 2024, it certifies forest & landscape restoration projects that can demonstrate measurable gains for biodiversity. Unlike many existing certification schemes, it focuses first on ecological outcomes & is designed to be affordable for small projects. Certification under TGBS begins with evidence. Projects are assessed using satellite imagery & on-the-ground surveys, which examine plants, animals, and local governance. Sites are scored against 8 criteria, including ecosystem integrity, protection, and stakeholder engagement. Results are reviewed, then audited by an independent 3rd party. Depending on performance, projects receive standard, advanced, or premium certification. A defining feature of the system is its reliance on regional hubs, often botanic gardens or local biodiversity organizations. These hubs conduct field assessments & provide mentoring. This approach avoids a consultant-heavy model & keeps costs down, said David Bartholomew, adding that local experts understand both species & social context. That approach was tested in Uganda, where The Jane Goodall Institute has been restoring a wildlife corridor. The project, supported by Ecosia, became the first to achieve advanced certification. Surveys found increasing numbers of native plants & forest-dependent birds. They also highlighted how restoration & livelihoods were linked. “The same people who were degrading the forest were the same people used to establish the restoration,” Said Mutegeki said. As interest in restoration continues to grow, TGBS aims to expand cautiously. Its premise is straightforward: forests should be judged not by how many trees they contain, but by whether they support life, people included.

Floods are intensifying Restoring floodplains offers a solution 🌏 Efforts to control river flow with levees, dams, and other structures have led to unexpected consequences that affect people globally. These engineered modifications were designed to protect communities from flooding but often exacerbate the problem. By disconnecting rivers from their natural floodplains, the risk of severe flooding downstream increases, impacting communities, agriculture, and infrastructure. The loss of natural floodplains has also degraded water quality, reduced biodiversity, and left rivers less resilient to climate extremes, posing challenges that affect millions worldwide. Healthy floodplains play an essential role in absorbing and distributing floodwaters, which helps to prevent catastrophic flooding and provides natural storage for groundwater recharge. Floodplains act as nature’s filtration system, removing pollutants and creating healthier water sources. Without these natural areas, rivers have become channels of faster, more forceful water that poses a greater risk to communities and reduces the ecosystem’s capacity to support diverse wildlife, including fish populations crucial for local economies and food security. To address these issues, restoring floodplains to their natural functions is essential. Setting levees back, reforesting floodplain areas, and reconnecting rivers with their floodplains offer sustainable solutions that enhance flood resilience and improve ecosystem health. By giving rivers room to flood naturally, it is possible to reduce the velocity of floodwaters, spread out their impact, and protect communities and habitats from severe damage. This natural approach supports both human safety and environmental restoration, creating conditions for rivers to thrive sustainably. Floodplain restoration also provides additional benefits, such as creating fertile soil for agriculture and providing spaces for recreation, which can strengthen local economies. These restored areas contribute to biodiversity by supporting native plants, fish, and wildlife that rely on seasonal flooding for reproduction and survival. Restored floodplains provide multiple functions and services that engineered solutions cannot, creating natural buffers that support both people and ecosystems. As climate change continues to increase the frequency and severity of floods, restoring natural floodplains is a critical part of climate action. #sustainability #sustainable #business #esg #climatechange #climateaction

I recently visited the 23,000 ha Corrour estate in Lochaber with my colleague Fiona Holmes to hear more about the ecological restoration work underway there from estate manager Donald Rowantree and conservation manager Sarah Watts. Located to the west of the Cairngorms National Park, the privately-owned estate is undertaking a great deal of peatland restoration, native woodland expansion (including montane scrub), and large-scale restructuring of conifer plantations. I hadn't visited for a few years and it was heartening to see the positive ecological results of reducing the grazing and browsing impacts of red deer. Over the past decade and a half, average red deer densities have been reduced from 17/sq km to 0.8/sq km. Not only is heather and bog myrtle much more vibrant and healthy-looking, but native trees and shrubs are popping up all over the place at a range of altitudes. For example, near Loch Treig there is now as much natural regeneration happening outside deer-fenced exclosures as within them. Rowans were particularly evident across much of the estate, which is a useful indicator as rowan is particularly palatable for deer. Unlike most other native tree species, they are not dependent on proximity to seed sources for natural regeneration, as they are typically dispersed by birds eating their berries and then pooping out the seeds across the wider landscape. The new growth now appearing will, in a few years, start to provide berries for a range of foraging wildlife species, while the leaf litter every autumn will help to nourish the soil. The strange-looking line in the landscape in the top photo is created by mature native trees that naturally regenerated within the protection afforded by the safety fences flanking the West Highland railway line. Now, however, the regeneration is happening all over the hillside above and below the railway line, right down to the shores of Loch Treig. The bottom two photos show woodland around Loch Ossian. #nature #ecology #environment #wildlife #rewilding #naturebasedsolutions #forestry

Europe just broke a record, and it's good news for business, not just biodiversity. 603 dams, weirs, and other river barriers have been removed across 21 European countries, the highest number ever recorded, up 11% from 2024's record and six times higher than in 2020. Sweden led the charge (173 removals), followed by Finland and Spain. Iceland and North Macedonia removed their first-ever barriers. The result: over 3,740 km (2,300+ miles) of rivers reconnected, real progress toward the EU's goal of 25,000 km of free-flowing rivers by 2030. Most of these dams were never meant to last forever. They were built decades, sometimes centuries, ago to power mills, generate small amounts of hydropower, or support navigation and agriculture. Many have been defunct for years, quietly fragmenting rivers long after they stopped serving any purpose. Today, Europe has an estimated 1.2 million river barriers, and more than 150,000 are already considered obsolete. Meanwhile, the continent's water systems are under growing strain: nine out of ten natural disasters in Europe over the past decade have been water-related, and roughly 80% of its wetlands have been lost over the last millennium. In that context, aging, unused dams aren't just outdated infrastructure. They're actively working against the flood protection, drought resilience, and water security Europe now needs. Why should businesses care about a river restoration trend? Why should businesses care about a river restoration trend? Flood & drought resilience: Free-flowing rivers act like natural sponges, absorbing floodwater and easing drought stress. That's lower risk exposure for insurers, agriculture, and any infrastructure sited near waterways. Water security: Reconnected rivers improve sediment and nutrient flow, supporting more reliable water supplies for manufacturing, food & beverage, and energy operations downstream. Lower liability, lower maintenance: Most removed barriers were small, obsolete structures nobody was using. Taking them out is often cheaper than maintaining aging, unsafe infrastructure, a lesson for any company still carrying legacy assets on the books. New economic activity: Restored rivers are driving eco-tourism, recreational fishing, and rewilding-linked investment in regions that had little to offer beyond a crumbling weir. ESG and regulatory alignment: With the EU's Nature Restoration Regulation now in force, companies with river-adjacent operations have a clearer roadmap, and an opportunity to get ahead of compliance rather than react to it. The takeaway: sometimes the smartest infrastructure move isn't building more. It's removing what no longer serves a purpose. Europe's rivers are proving that letting go can unlock more value than holding on. #sustainability #esg #infrastructure #watersecurity #climateresilience #europe

In general our soils are either - alive and fungi‑rich, sponge‑like, holding moisture and rapidly breaking down organic matter—or they are depleted, dry and compacted, unable to process surface litter and primed as tinder boxes. This can be one of the most overlooked foundations of wildfire prevention: the fungal networks beneath our feet and the living “soil sponge” they create. In healthy landscapes, fungi form deep symbiotic relationships with diverse native forests. These forests tend to be far less combustible, often slowing or even suppressing advancing fires by maintaining cooler, more humid microclimates. Forest structure is critical. Dense, multi‑layered canopies restrict airflow that would otherwise fan flames, while continuously cycling moisture, from canopy to soil and back again—creating conditions where fire struggles to take hold and decomposer fungi can thrive. In turn, the fungi can rapidly break down surface litter that would otherwise accumulate as fuel. Their activity builds rich, organic soils that hold more water, reinforcing the system’s natural fire resistance. Restoring dense, diverse native forests is one of the most effective long‑term strategies we can implement. Prioritising the replacement of tinderbox‑like monocultures of species such as eucalyptus and pine with more resilient, biodiverse systems could significantly reduce wildfire intensity, keeping fires more localised and less destructive. #biodiversity #reforestation #restoration #wildfires #bees #livelihoods #naturebasedsolutions #climate