Keeping woodlands in Wales and Ireland healthy

Glossary N


NAO:North Atlantic Oscillation.
National Forest Inventory:A periodic national survey identifying woodland cover; woodland by ownership; and woodland by Interpreted Forest Type. A wide range of information is gathered, including tree species, age and stocking density.
Nativeness:Can refer to any element of the woodland ecosystem but the most practical application is the degree to which a woodland canopy is composed of site-native trees and shrubs, since the canopy has a dominant role in the ecosystems processes and is also the component most frequently and substantially influenced by woodland management.
Native species:A species that arrived in Wales without the assistance of humans during post-glacial colonisation.
Native woodland:Woodland in which >50% of the canopy is mainly composed of site-native species. A native woodland in favourable condition would have, where present, a shrub and ground layer predominantly composed of characteristic woodland species.
Naturalness:Requires a composition of native species but also natural ecological processes and ideally, appropriate structural diversity.
Natural resources:The whole of the physical and living environments and all the resources and ecosystem services they provide
NBGW:National Botanic Garden of Wales.
NCAR:National Center for Atmospheric Research, Bolder, Colorado, USA.
Neotype:In Entomological Terms – a specimen selected as type specimen subsequent to the original description in cases where the original Holotype, or Lectotype, or all paratypes, or all syntypes are lost or destroyed or suppressed by the Commission.
New native woodland:Newly established woodland of at least 80% native species. The creation of new native woodland can be through natural regeneration, colonisation or planting on currently unwooded ground. Woodland established since 1995.
Nomenclature:In Entomological Terms – the description of new taxa or alterations to the concept of previously described taxa which involve changes in the names of taxa.
Nova species, n.s; n.sp:In Entomological Terms – a new species
NRW:On 1st April 2013 Natural Resources Wales took over the functions of the Countryside Council for Wales (CCW), Environment Agency Wales (EAW) and Forestry Commission Wales (FCW), as well as some functions of Welsh Government to ensure that the natural resources of Wales are sustainably maintained, used and enhanced, now and in the future and work to maintain and improve the quality of the environment and the natural resources more resilient to climate change and other pressures.
Numerical taxonomy:In Entomological Terms – the study of the relationship of taxa by the application of numerical similarity values to characters so as to rank into categories based on degree of overall similarity.
NUTS Classifications:The Nomenclature of Territorial Units for Statistics (NUTS) has been created by Eurostat in order to provide a standard classification of the EU territory. It is sub-divided into 3 levels going from large regions like the German Länder (NUTS II) to small territories as e.g. the French departments or the Italian provinces (NUTS III).
Nymph:The name given to the young stages of insects that undergo a partial metamorphosis. The nymph usually resembles the adult in shape, although it has no functional wings, and it gets more like the adult at each moult.
Using nature's weapons to battle current and future threats

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