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invasive species

Invasions of alien bird species rising at an alarming rate

The EU is committed to tackling the threat of invasive alien species (those introduced outside their natural past or present distribution, that become problematic species).  As part of this commitment, EU horizon scanning in 2016 identified 95 new or emerging species for which there was high or very high priority for risk assessment. The list was created to enable early preventative actions to be ...
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Alien species and the EU Water Framework Directive: a comparative assessment of European approaches

Although the European Water Framework Directive (WFD) does not refer explicitly to alien species (AS), it is clear that invasive AS (IAS) are considered a pressure on WFD water bodies. This article discusses the results of a questionnaire sent to all EU Member States, demonstrating considerable variability in the way that AS data are used in implementing the WFD. Responses were received from 18 co...
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Project aims to control spread of Giant Hogweed on River Loobagh

Limerick City and County Councils have embarked on a three year project to control the spread of Giant Hogweed on the River Loobagh near Kilmallock. The plant, which can grow up to five metres in height, is one of the most unwanted invasive species in Ireland.  Introduced into Ireland and Britain in the 19th century as a Victorian Garden curiosity, it "escaped" into the wild firstly in the Dublin...
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Invasive Species – False Widow Spider

Researchers at NUI Galway have published research which shows that the False Widow spider is taking over Ireland and is an invasive species with a detrimental effect on native species. In Ireland, False Widow spiders live close to buildings and houses inhabited by people. They only survive in cities and not in rural areas.  Dublin, Cork and Wexford have the highest number of False Widows to date....
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Crayfish Plague Outbreaks – Update from Biodiversity Ireland

The following is a list of the rivers where outbreaks of Crayfish Plague have been confirmed by diagnostic tests. The map accompanying this information note shows the affected catchments in red and the locations of mortalities or positive tests using environmental-DNA indicated by the star symbol. Please note the map only shows affected sites with proven cases of Crayfish plague. The disease...
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Warning issued over ‘severe and increasing’ threat to native crayfish species

A warning has been re-issued to all water users in Ireland by the Department of Culture, Heritage and the Gaeltacht’s National Parks and Wildlife Service (NPWS), along with the Marine Institute about the “severe and increasing” threat to the native crayfish species.  The warning comes after the confirmation this spring of crayfish plague on the River Maigue, upstream of Adare, Co Limerick. Irel...
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Mystery discharge turns Cork river white

Inland Fisheries Ireland (IFI) says it has been unable to identify the source of a mystery discharge which turned a tributary of the River Lee white. However, the agency said that fish were unaffected by the incident on a stretch of the Bride River near Blackpool, just north of Cork city centre late on Tuesday night.  An IFI spokesperson said they have now reported the incident to the local aut...
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Invasive Japanese Knotweed spreading throughout residential area of Dublin

One of Europe’s most hated weeds has been spreading throughout a residential area of Dublin and is threatening to damage and devalue properties there.  The spread of the most “aggressive, destructive and invasive plant” on Dublin City Council-owned land in Stoneybatter near the Phoenix Park has sparked concern among local homeowners. The council has begun spraying Japanese Knotweed on the O’Devan...
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Cork County Councillors disagree on how to stop Japanese knotweed invading private estate

Fears have been raised that shifting Japanese knotweed around a site designated for social housing in West Cork could put nearby private properties at risk by undermining building foundations. A Cork County Council meeting heard yesterday the invasive plant is to be moved from one part of the site, in Clonakilty, to another section where it will be entombed and sealed with plastic.  Japanese kn...
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Invasive Species Week, 23-29 March 2018

Image courtesy of National Biodiversity Data Centre According to the National Biodiversity Data Centre, the number of invasive species in Ireland has increased by 183 per cent in the past 50 years. Invasive species were estimated to have cost the economies of Ireland and Northern Ireland a combined total of over €261million in 2013 and are a major threat to our native flora and fauna. At ...
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