Invasive non-native species

Trees in Hard Landscapes, A Guide for Delivery, published by the Trees and Design Action Group in September 2014, defines invasive non-native species (INNS) as: ‘…a non-native animal or plant that has the ability to spread causing damage to the environment, the economy, our health and the way we live.’

Water for life and livelihoods, River basin management plans, Glossary, Published by the Environment Agency in 2016, states: ‘Many species of plants and animals have been introduced to this country. Several of these non-native species are invasive and have been causing serious problems to the aquatic and riverine ecology and environment. Problems include detrimental effects on native species, deoxygenation of water causing fish mortalities, blocking of rivers and drainage channels, predation and competition with native species, and, in some cases, pose health risks to the public or livestock.’

North Ayrshire Local Biodiversity Action Plan, 2019-2031, published by North Ayrshire Council, states in relation to invasive non-native species (INNS): ‘Non-Native Species (NNS) are those species found outside their normal or native range as a direct result of human activity. When a non-native species is established and then becomes a problem to the local ecosystem or economy, it is labelled ‘invasive’.’

They are also referred to as alien invasive species.

See also: Native species.

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