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UKBI - Spring Index

Published date 2024-12-10

Last updated: 2024Latest data available: 2023IntroductionThis is a context indicator and is not assessed; it is shown to highlight a biological response to climate change and a potential pressure on b...


Chief Executive

Published date 2025-05-20

The main responsibilities of this post are to:Manage JNCC on a day-to-day basis and oversee the delivery of its work.Act as Accounting Officer for JNCC, with responsibility for the efficient and effec...


Alpine and subalpine calcareous grasslands

Published date

Natural and semi-natural grassland formations Description and ecological characteristics This habitat occurs on lime-rich soils and consists of short, often grazed, species-rich mixtures of mountain a...


Spartina swards (Spartinion maritimae)

Published date

Marine, coastal and halophytic habitats Description and ecological characteristics Cord-grass Spartina spp. colonises a wide range of substrates, from very soft muds to shingle, in areas sheltered fro...


Perennial vegetation of stony banks

Published date

Marine, coastal and halophytic habitats Description and ecological characteristics Shingle structures develop when a sequence of foreshore beaches is deposited at the limit of high tide. More permanen...


IR.FIR.SG.CrSpAsAn Anemones, including Corynactis viridis, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock

Published date 2015-03

Vertical very exposed and exposed bedrock gullies, tunnels and cave entrances subject to wave-surge dominated by sponge crusts such as Clathrina coriacea, Myxilla incrustans, Pachymatisma johnstonia a...


IR.HIR.KSed.ProtAhn Polyides rotunda, Ahnfeltia plicata and Chondrus crispus on sand-covered infralittoral rock

Published date 2015-03

Low-lying rock surrounded by mobile sand and often subject to burying by the sand, with a turf of resilient red seaweeds Chondrus crispus, Polyides rotunda and Ahnfeltia plicata typically protruding t...


LR.FLR.CvOv Littoral caves and overhangs

Published date 2015-03

Where caves and overhangs occur on rocky shores, the shaded nature of the habitat diminishes the amount of desiccation suffered by biota during periods of low tides which allows certain species to pro...


IR.MIR.KR.Ldig.Ldig Laminaria digitata on moderately exposed sublittoral fringe bedrock

Published date 2015-03

Exposed to sheltered sublittoral fringe bedrock dominated by a dense canopy of Laminaria digitata, often with a wide range of filamentous and foliose red seaweeds beneath. The most frequently occurrin...


SS.SSa.CFiSa Circalittoral fine sand

Published date 2015-03

Clean fine sands with less than 5% silt/clay in deeper water, either on the open coast or in tide-swept channels of marine inlets in depths of over 15-20 m. The habitat may also extend offshore and is...



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