What is Grassland?

Grassland is land where grasses and other low-growing herbaceous plants dominate rather than trees and shrubs. Some British grasslands have developed naturally where conditions restrict tree growth, but much of the UK’s grassland has been shaped over centuries by grazing, haymaking and other human activity.

Without grazing, cutting or naturally harsh conditions, many lowland grasslands would gradually change. Taller plants and scrub would establish, followed eventually by woodland in suitable locations. Traditional farming practices therefore became an important part of maintaining many of the grassland habitats and species we recognise today.

Lowland Meadows

Traditional lowland meadows can be exceptionally rich in wildflowers. They were historically managed for hay, usually being left uncut through spring and early summer before the hay crop was taken. Livestock might then graze the aftermath later in the year.

Plants associated with these meadows include Oxeye Daisy (Leucanthemum vulgare), Meadow Buttercup (Ranunculus acris), Red Clover (Trifolium pratense), Common Knapweed (Centaurea nigra) and Yellow Rattle (Rhinanthus minor).

Yellow Rattle is particularly important because it is partly parasitic on grasses. By weakening vigorous grasses, it creates opportunities for less competitive wildflowers to establish.

Chalk and Limestone Grasslands

Where soils are thin and lie over chalk or limestone, grasslands can become extraordinarily diverse. The nutrient-poor conditions prevent a few vigorous plants from dominating, allowing many smaller species to coexist.

Chalk grassland is particularly characteristic of southern England, while limestone grasslands occur in several parts of Britain.

Typical plants can include Wild Thyme (Thymus polytrichus), Lady’s Bedstraw (Galium verum), Salad Burnet (Sanguisorba minor), Bird’s-foot Trefoil (Lotus corniculatus) and numerous orchids.

These flower-rich grasslands provide valuable feeding and breeding habitat for butterflies, moths, bees and other insects.

Acid Grassland

Acid grasslands develop on acidic, generally nutrient-poor soils. They occur from lowland heaths and commons to extensive areas of upland Britain.

Plants vary according to location but can include fine-leaved grasses, Sheep’s Sorrel (Rumex acetosella), tormentil and heath bedstraw. In wetter or more upland conditions they may grade into heath, moorland or bog communities.

Although acid grassland can appear less colourful than a traditional hay meadow, it supports its own specialised community of plants, fungi and animals.

Upland Grasslands

Britain’s hills and mountains contain extensive areas of grassland influenced by altitude, exposure, rainfall, soil and grazing.

Sheep, cattle and wild herbivores have a considerable influence on these landscapes. Heavy grazing can produce short, species-poor turf, while more varied grazing levels can create a mosaic of grasses, flowering plants, rushes, heath and scrub.

Upland grasslands provide habitat and feeding areas for birds including skylarks, meadow pipits and several birds of prey.

Coastal Grasslands

Around Britain’s coastline, grasslands have adapted to strong winds, salt spray and exposed conditions. Cliff-top grasslands can remain naturally short because of wind exposure and thin soils.

Plants may include Sea Thrift (Armeria maritima), Bird’s-foot Trefoil (Lotus corniculatus), plantains and various grasses. Different communities develop according to geology, exposure and the amount of salt reaching the vegetation.

Coastal grassland can be particularly valuable for insects and nesting or feeding birds.

Grazing and Grassland

Grazing is one of the forces that creates and maintains grassland diversity.

Cattle tend to tear vegetation with their tongues and create patches of different heights. Sheep graze much more closely, while horses have another distinctive grazing pattern. Their hooves also disturb small areas of soil, creating opportunities for seeds to germinate.

Dung provides habitat and food for beetles, flies, fungi and other organisms, which in turn support birds and mammals.

Too much grazing, however, can prevent flowering and reduce plant diversity, while too little can allow coarse grasses and scrub to dominate. Successful grassland management therefore depends upon finding an appropriate balance.

Grasslands and Wildlife

A species-rich meadow is far more than a collection of grasses and flowers.

Flowers provide nectar and pollen for bees, butterflies, moths, hoverflies and beetles. Leaves provide food for caterpillars and other herbivorous insects. Seeds feed birds and small mammals, while the insects themselves support birds, bats and other predators.

Beneath the surface is another ecosystem containing earthworms, insects, microorganisms and extensive fungal networks. Grassland soils can store considerable quantities of carbon, particularly when they remain undisturbed.

The result is an interconnected food web stretching from microscopic soil organisms to some of Britain’s largest mammals and birds.

The Loss of Traditional Grasslands

Britain has lost much of its old species-rich grassland through changes in land use. Ploughing, development, drainage, reseeding, fertilisers and changes in grazing or cutting have transformed many traditional meadows and pastures.

A modern agricultural field may still appear to be grassland, but a field dominated by a small number of productive grass species is ecologically very different from an old meadow containing dozens of plant species.

Ancient and unimproved grasslands are therefore particularly valuable because their biological communities may have taken decades or centuries to develop.

Restoring Grasslands

Grasslands can often be restored, although recreating an ancient meadow is considerably more difficult than simply sowing wildflower seed.

Reducing soil fertility, changing mowing regimes, introducing suitable grazing and allowing locally appropriate native plants to establish can gradually increase diversity. Green hay taken from a nearby species-rich meadow is sometimes spread over restoration sites so that its seeds fall onto the ground.

Creating even relatively small areas of grassland in gardens, community spaces and road verges can provide useful connections between larger habitats.

Grasslands Through the Seasons

Grasslands change dramatically throughout the year.

Spring brings fresh growth and the first flowering plants. In summer, traditional meadows can reach their greatest diversity, filled with flowers, pollinating insects and developing seed heads.

During autumn, seeds mature and many animals take advantage of the remaining vegetation and insects. In winter, growth slows considerably, but the grassland remains alive. Seeds lie dormant, insects overwinter within stems and soil, fungi continue their work below ground, and standing vegetation provides shelter for wildlife.

A Living Landscape

The grasslands of the UK are not simply areas where trees happen to be absent. They are complex habitats shaped by geology, climate, plants, animals and centuries of management.

From a tiny patch of chalk grassland containing orchids and butterflies to a vast upland pasture crossed by sheep and meadow pipits, every grassland forms part of the wider landscape.

Protecting existing species-rich grasslands, restoring damaged areas and allowing more flowers to grow within gardens, farms and public spaces can help reconnect these fragmented habitats.

A meadow may look simple from a distance. Look closely, however, and it becomes an intricate community in which soil, grasses, wildflowers, fungi, insects, birds and mammals are all connected.