Term name Description
Base-rich grasslandsBase-rich soil is formed from rocks like limestone and old red sandstone. It is rich in calcium and other ‘bases’ and supports plants which are ‘lime-loving’. The most common type of base-rich grassland, usually found on south-facing slopes, is characterised by bent and fescue grasses and wild thyme.
BatholithVast plutons of granite and related rocks. Deep melting of the continental crust gives rise to granitic magma. In time this rises as enormous red–hot, gas–rich blobs of semi–molten rock, which eventually gather higher in the crust, but do not reach the surface and cool to become batholiths.
BiodiversityVariation in living things – species, genetic and ecosystems (a contraction of the terms biological and diversity)
BioticLiving/biological (cf. abiotic), usually applied to factors that affect plant growth or animal distribution
Boulder tonguesBoulder tongues are often formed from the unstable rock debris which is swept down into corries and glens during an avalanche.
BPAbbreviation for before present – a system of dating early periods – adds 2000 years on to a BC date
BraidedIntertwining of the course of streams or rivers over flat, broad valley bottoms
BroadleavesTrees with broad leaves, most often deciduous, for example oak, hazel and rowan. Holly is an evergreen broadleaf
Bronze AgeA period of pre–history and stage of culture between the Stone Age and Iron Age, around 3700 years BP until 2800–2500 years BP
BrowserAn animal that feeds on small branches and twigs of trees and scrub
Buffering capacityThis is the ability of soil to deal with toxicities.  The level of buffering capacity affects plant root growth.
BulbilA small bud that grows into individual plantlets, allowing some plants to reproduce vegetatively reproduction
By-catchNon–target fish/animals caught unintentionally
British Isles

The British Isles is an archipelago consisting of England, Wales, Scotland, Ireland and includes over 1,000 islands around the coast.

Blanket bog

Blanket bogs usually form in upland peat areas above 200m with heavy rainfall and low temperatures.