Sweden · Biodiversity · Species

Sweden Biodiversity: Animal and Plant Species and What Is Under Threat

Sweden’s species list reads like a geography of the north: moose and reindeer, lynx and wolf, spruce and birch, orchids and lichens, cod and salmon. The threat to that list is not one crisis but a slow shifting of the baseline — in the forest, on the farm, along the coast and up the mountain.

Constructive Voices · Updated September 2026 · Part of the Countries Built Environment record

A spruce forest in Sweden. Managed spruce dominates the Swedish landscape, and the shift from mixed, old, fire-shaped forest to even-aged production stands is the single largest driver of species decline. Photo: W.carter, CC0.

Ask what lives in Sweden and the answers are vivid. The country has Europe’s largest moose population, one of its most important brown bear populations, and the southern edge of the Arctic’s reindeer herding culture. Its forests hold fungi and lichens that take decades to mature; its mountains hold arctic-alpines at the southern limit of their range; its Baltic waters hold a brackish community found nowhere else on Earth.

Ask what is under threat and the answers are more diffuse. Sweden does not have a single charismatic megafauna crisis in the way that some tropical countries do. It has a cumulative, landscape-scale problem: a forest that is industrially productive and ecologically simplified, a farmed landscape that has lost its small-scale mosaic, a Baltic that is over-enriched, and a climate that is warming the north fastest. The national Red List, compiled by the Swedish Species Information Centre at SLU Artdatabanken, is the instrument that tracks the result.

01 / The emblems

Moose, reindeer and the forest they share

The moose (älg) is the animal most Swedes actually encounter, and its fortunes are tied directly to forestry. Clear-felled and young regrowth stands provide abundant browse, so moose have in some regions thrived on the very management that harms forest biodiversity. That abundance is itself managed, through hunting quotas set partly to reduce browsing damage to young timber. The moose is therefore a good example of a species whose population is a policy variable as much as an ecological one.

The reindeer is the counter-case. Reindeer herding is the economic and cultural foundation of Sami life in northern Sweden, and it depends on winter grazing — especially ground and tree lichens — that is slow-growing and easily destroyed. Clear-felling removes lichen mats and tree lichens that may take half a century or more to recover; wind farms, mines, roads and power lines fragment the pasture further. What looks like intact northern forest from the air is, from the perspective of a herding community, a landscape of cumulative losses.

Between them, moose and reindeer make the same point from opposite directions: in Sweden, large mammals are not separate from land use. They are outcomes of it.

Source: Swedish Forest Agency, Skogsstyrelsen — forest and wildlife management.

02 / The predators

Large carnivores and the quarrel about numbers

Sweden’s large carnivores — brown bear, wolf, lynx and wolverine — are all protected in principle and all managed by quota in practice. The bear population is the largest of the four and comparatively stable; the lynx is the most numerous cat; the wolverine is a mountain specialist; and the wolf is the most politically charged animal in the country.

The wolf population has been the test case. Reporting in January 2025 described a licensed hunt with the stated aim of halving the population, following a fall of almost 20 per cent in 2022–23 to roughly 375 recorded individuals. Conservation scientists have warned that a population at that level, and still declining, is too small to be genetically secure over the long run, given the population’s narrow founding base. Rural and herding interests argue that the population had grown beyond what their communities and livestock can absorb.

The wolverine illustrates a similar tension with sharper edges. It is a predator of reindeer calves, and herders bear direct losses from a species they are not permitted to manage at will. Researchers have noted that Sweden holds a large share of Europe’s wolverines and therefore a special responsibility for them — which does not remove the cost from the people living alongside them.

Sources: The Guardian, Sweden begins wolf hunt (1 January 2025); The Conversation, Europe is going wild — bears, wolves, lynx.

03 / The quiet majority

Species that have no constituency

Most of Sweden’s biodiversity is not furred or feathered in a way that draws a rally. It is wood-decay fungi, lichens, mosses, beetles and saproxylic insects — the community that lives in and on dead wood. These species are the direct casualties of a forest model that removes dead wood and fells on a short cycle. A stand that is cut, replanted and cut again never accumulates the large, late-decay logs and old hollow trees that this community needs.

The same is true of semi-natural grassland. Sweden’s traditional farmed landscape — hay meadows, wooded pastures, pollarded trees — supported an exceptional richness of flowers, butterflies and bees that has declined sharply as agriculture has intensified or been abandoned. Species that depended on the low-intensity mosaic fell between two stools: too unproductive to farm, too valuable to lose.

Freshwater and wetland species make up another quiet majority. Mires hold specialised plants and insects; rivers and lakes hold fish whose life cycles require connectivity; and drainage, hydropower and nutrient loading have all worked against them. None of these species will ever headline a campaign, and all of them are what the Red List is actually counting.

Source: SLU Artdatabanken, the Swedish Red List and species information.

04 / The Baltic

A sea under stress

The Baltic is Sweden’s other biodiversity system, and arguably its most degraded. Brackish, shallow and almost enclosed, it flushes slowly — which means nutrients that enter it stay. HELCOM, the regional marine convention, identifies eutrophication as the Baltic’s defining problem: excess nitrogen and phosphorus from agriculture and wastewater feed algal blooms, which die and decompose, consuming oxygen and producing dead zones on the seabed.

The consequences ripple through the food web. Cod, a key predator, has struggled in parts of the Baltic for years, with recruitment failures linked to a combination of overfishing, oxygen loss and food-web change. Eelgrass beds, which shelter juvenile fish and store carbon, are sensitive to light loss and physical disturbance. And on the coast, the archipelagos that give Sweden its summer identity are also its most species-rich shallow habitats.

Sweden’s built environment touches this system from the shore: wastewater treatment, stormwater management and coastal construction all discharge into it. Nutrient reduction is a decades-long project with a genuinely measurable goal, and it is one of the clearest places where engineering choices translate directly into ecological outcomes.

Source: HELCOM, Baltic Sea trends — eutrophication.

05 / Carbon and species, same forest

Why the climate and nature arguments converge

Sweden’s forestry debate is often framed as environment versus economy, but the more important insight is that the climate argument and the biodiversity argument point the same way. The 2025 study reported by The Conversation found that old-growth natural forest stores 78–89 per cent more carbon than managed woodland — a difference larger than Sweden’s cumulative fossil-fuel emissions. The structures responsible — old trees, deep soil carbon, accumulations of dead wood — are precisely the habitat that forest specialists require.

This means that protecting and restoring old forest is not a trade-off against climate action; it is part of it. It also means that a rising national timber volume, however real, is a production metric rather than an ecological one. The two can move in opposite directions for decades before anyone is forced to notice.

What “old growth” means

Not untouched wilderness, necessarily, but forest that has developed continuity — age, dead wood, structural variety and a history of natural disturbance — over long periods. Reporting has documented that between 2003 and 2019 nearly a quarter of Sweden’s last unprotected old-growth forest was logged, a rate of about 1.4 per cent a year. Continuity cannot be replanted; it can only be left alone.

Source: The Conversation, Sweden’s old-growth forests store 83% more carbon (2025).

06 / Mountains and the warming north

The arctic edge

Sweden’s mountain zone is the southern edge of the Arctic in mainland Europe, and it is warming faster than the national average — a pattern seen across the high north. Arctic-alpine plants, which survive on the cool, exposed summits that most of Scandinavia cannot offer, face a shrinking envelope as treelines rise and snow cover becomes less reliable. Species are effectively being pushed off the top of the country.

The mountain landscape is also where climate policy collides with biodiversity most visibly. Wind power, mineral extraction needed for batteries and electrification, hydropower and the infrastructure that serves them all leave footprints in exactly the areas where the arctic-alpine flora, wild reindeer-related grazing and predator populations are most sensitive. Sweden’s transition to a fossil-free economy is, in this sense, being built partly on its most fragile ecosystems — which is why siting and cumulative-impact assessment matter as much as the technologies themselves.

Sources: Arctic WWF, the Arctic and its biodiversity; the Swedish environmental objectives framework for mountain ecosystems.

07 / The accounting

How Sweden measures what it is losing

Sweden’s biodiversity accounting runs on two tracks. The first is the Red List, which assigns each assessed species a category of extinction risk and is updated periodically by SLU Artdatabanken. The second is the environmental objectives framework — sixteen generational goals, including “A Rich Diversity of Plant and Animal Life” — for which the responsible agencies publish indicators and annual follow-up.

The value of these instruments is that they make decline visible and attributable. The weakness is that both operate at a level of aggregation that can hide the mechanism. A national indicator can move slowly while a specific habitat — old forest, semi-natural grassland, a Baltic fishing ground — is being transformed underneath it. The most useful way to read Swedish biodiversity is therefore habitat by habitat, not headline by headline.

Sources: SLU Artdatabanken, Swedish species information and Red List; Climate Change Performance Index, Sweden 2026.

08 / What protecting it would take

Four realistic levers

Leave more forest old. The most direct measure is to protect the remaining unprotected old-growth forest and lengthen rotations, accept higher retention of dead wood and old trees, and bring the loss rate toward zero. This is a land-use decision with a real cost, and it is the one with the largest biodiversity return.

Restore the wet places. Peatland and wetland restoration reverses a carbon source and rebuilds habitat simultaneously. Sweden’s peat mapping now supports targeting at landscape scale, and EU restoration obligations give the work a deadline.

Clean the Baltic. Continued nutrient reduction from agriculture and wastewater is unglamorous and slow, but it is the only route back toward the HELCOM goal.

Build with the forest in mind. The built environment consumes Swedish timber at scale. Certification that genuinely protects old growth, greater use of reclaimed and reused material, and honest accounting of where construction wood comes from turn construction demand from a pressure into a lever.

Key takeaways

Sweden’s species are not in a single crisis but in a slow, landscape-scale squeeze: a simplified forest, a lost farmed mosaic, an over-enriched Baltic and a rapidly warming mountain north. The emblematic animals — moose, reindeer, wolf, bear, lynx — are managed policy variables as much as wildlife, and the conflict over wolf numbers shows how contested “enough” is. Most of the loss is in unglamorous places: dead-wood communities, semi-natural grassland, peatland and rivers. Protecting old forest serves climate and biodiversity at once, which is why it is the highest-value intervention on the table.

09 / The farmed landscape

The mosaic that was lost

Sweden’s most dramatic biodiversity loss is not in the forest at all — it is in the countryside that Swedes think of as ordinary. For centuries, farming here was low-intensity and small-scale: hay meadows cut late, wooded pastures grazed lightly, trees pollarded rather than felled, field margins left rough. That pattern created one of Europe’s richest semi-natural habitats, and it depended entirely on a farming economy that no longer exists.

As agriculture intensified on the good land and was abandoned on the marginal land, the mosaic came apart. The species that relied on it — grassland flowers, butterflies, bees, meadow birds, the fungi and insects of grazed woodland — had nowhere to go. Reporting on the Swedish Red List has repeatedly identified the agricultural landscape as one of the categories with the largest number of red-listed species, and the country’s own earlier records noted that the agricultural landscape had seen the extinction of over a hundred species. What makes this loss distinctive is that the habitat was never “wild”. It was a by-product of a way of farming, and when that way of farming ended, the biodiversity ended with it.

Restoring it is possible but expensive: it requires paying farmers to manage land for nature rather than yield, reintroducing grazing where scrub has closed in, and accepting that the result is a landscape that produces less food and more species. Sweden does run agri-environment schemes, as all EU members must, but the funding has not scaled to reverse the decline.

Source: SLU Artdatabanken, Swedish Red List — habitat summaries.

10 / Freshwater and the rivers

Connectivity as a conservation goal

Three of Sweden’s great river systems — the Torne, Kalix and Pite — are among the last large unregulated rivers in Europe, and the country’s national river protection has kept them that way. Most other rivers, however, carry hydropower dams that generate low-carbon electricity and simultaneously block the movement of fish and sediment. Salmon, trout and eel all depend on rivers they can ascend and descend, and migration barriers are the reason several species are now propped up by hatcheries and fishways rather than self-sustaining populations.

Freshwater biodiversity in Sweden is therefore a study in trade-offs. The same hydroelectricity that gives the country one of the cleanest grids in the world is a barrier to the country’s freshwater species. The emerging answer is not to remove the dams but to make them passable where possible, to protect the rivers that remain free-flowing, and to restore the gravel beds and stream habitats that have been degraded by logging and drainage. The EU restoration framework now pushes toward removing barriers where the benefit is greatest — a genuinely difficult conversation in a country that has built much of its electricity on those rivers.

Source: European Commission, EU Biodiversity Strategy 2030 — freshwater restoration.

11 / Invasive species and a warming north

New arrivals, new pressure

Climate change does not only push arctic species upward; it also opens Sweden to species that previously could not survive here. Warmer winters, longer growing seasons and higher sea temperatures have allowed invasive plants, insects, pathogens and marine organisms to gain a foothold. Forest pests are a particular concern for a country whose economy rests on timber, and invasive marine species are a particular concern in a Baltic already stressed by warming and low oxygen.

The interaction is what matters. A warming climate weakens native species and their habitats at the same time as it makes the country more hospitable to arrivals, so the two pressures compound. This is why climate adaptation and biodiversity protection in Sweden cannot be managed as separate portfolios: the same warming that threatens the mountain floras and the Baltic cod also rearranges the competitive balance across almost every ecosystem in the country. The practical response — biosecurity, monitoring, early detection and maintaining the integrity of intact habitats so they can absorb change — is largely unglamorous, and it is the work that decides whether the next Red List update is better or worse.

Sources: HELCOM, Baltic Sea trends; Arctic WWF, the changing Arctic.

12 / The accounting

Reading the Red List honestly

The national Red List is the most important single document in Swedish conservation, and it rewards careful reading. It distinguishes between species that are genuinely threatened and those that are merely rare, between species whose populations are declining and those that are stable at low numbers, and between species at risk from habitat loss and those at risk from overharvest. Aggregating all of that into a single share of threatened species obscures as much as it reveals.

Two cautions are worth carrying. The first is that Red List assessments follow the global IUCN methodology, so a species can be listed as Least Concern globally while being threatened nationally, or vice versa; Sweden’s responsibility is set by its share of the European and global population. The second is that the list changes when knowledge improves, not only when nature does, which is why sudden jumps in the numbers should be read as questions rather than conclusions. Used carefully, the Red List is a habitat-by-habitat diagnostic tool — and the diagnosis it gives for Sweden is consistent: forest specialists, farmland species, freshwater life, Baltic marine communities and mountain plants are the groups under the most sustained pressure.

Sources: SLU Artdatabanken, Swedish Species Information Centre; IUCN, Red List categories and criteria.

13 / In the built environment

Why this belongs in a construction record

This report sits inside a record about the built environment for a specific reason. Sweden’s buildings and infrastructure are not downstream of biodiversity loss; they are one of its drivers and one of its potential solutions. Swedish construction consumes the products of the Swedish forest, occupies coastal and northern land, discharges to the Baltic, and shapes how water moves through the landscape. The choice between a timber building sourced from a certified, old-growth-protecting supply chain and one sourced from whichever stand is cheapest is a biodiversity choice, whether or not anyone calls it one.

The same is true of infrastructure. Every road, wind farm and transmission line is an ecological decision in the north. The country that produced Greta Thunberg and near-decarbonised its electricity is now working through the harder, less photogenic problem of what its prosperity does to the landscapes it depends on. That is not a contradiction peculiar to Sweden; it is the central tension of the transition, and Sweden is simply far enough along to be confronting it in the open.

Key takeaways

Sweden’s biodiversity loss is a working-landscape story: a simplified forest, a lost farmed mosaic, a fragmented freshwater system, a stressed Baltic and a warming mountain north. Emblematic species like the wolf and reindeer sit at the centre of fierce arguments about “enough” and who bears the cost of conservation. Most of the actual loss is in species with no constituency — dead-wood communities, grassland insects, mire plants, freshwater fish. Protecting old forest and restoring peatland serve climate and nature at once and are the highest-value interventions available. Because Swedish construction is a major forest consumer, a coastal land user and a Baltic discharger, the built environment is directly implicated in whether the trend turns.

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Primary sources and news citations

The Conversation, Sweden’s old-growth natural forests store 83% more carbon than managed woodlands (2025).
The Guardian, Sweden begins wolf hunt as it aims to halve endangered animal’s population (1 January 2025).
The Conversation, Bears, wolves, lynx — Europe is going wild.
HELCOM, Eutrophication — Baltic Sea trends.
SLU Artdatabanken, Swedish Species Information Centre and the national Red List.
Swedish Forest Agency, Skogsstyrelsen.
Arctic WWF, Arctic biodiversity.
Climate Change Performance Index, Sweden — Climate Performance Ranking 2026.

Methodology and sourcing. Figures are attributed to the datasets and reporting cited; population numbers are described as recorded estimates and are not presented as fixed. Where the interpretation of a species’ status is disputed — notably wolf population viability — the report states the competing positions. This report describes the position as at September 2026.

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Sweden Biodiversity: Animal and Plant Species and What Is Under Threat

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