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  		The Big Dee Day - the Invasion
  		Published: 17/06/2015
Organisations across North Wales and Cheshire are appealing for volunteers to 
help tackle invasive non-native species on the River Dee and its tributaries.
Following two successful years of The Big Dee Day 鈥 The Invasion, the event is 
being repeated again this summer. 
The previous two years have seen up to 60 events and nearly 2,000 volunteer 
hours put towards tackling invasive non-native species like Himalayan balsam, 
Japanese knotweed and Giant Hogweed.  
A coordinated programme of volunteer activities is taking place this month with 
various opportunities for people to get involved, from the river鈥檚 source in 
Snowdonia National Park right through to the Dee estuary, until August.
The event is open to everyone across the region to help remove invasive 
non-native plants from the River Dee and its tributaries and to record infested 
areas. The species that will be tackled are alien species, brought to the UK 
either accidentally or intentionally, which can cause big problems for native 
wildlife, as well as having other effects, such as making river banks more 
prone to erosion and increasing the risk of flooding.  
A partnership of Welsh and English organisations including five local authority 
Countryside Services, Snowdonia National Park Authority, DINNS Project, Keep 
Wales Tidy, the Welsh Dee Trust, BASC, the Clwydian Range and Dee Valley AONB 
are involved in organising the event and it is funded by Natural Resources 
Wales.  
Councillor Bernie Attridge, 天涯社区s Cabinet Member for 
Environment said:
鈥淏ig Dee Day - The Invasion is growing year on year and is proving to be a 
great opportunity for us to make a positive impact on the River Dee and our 
local environment. Our thanks go to all those volunteers who have helped out 
over the last two years, and I鈥檇 encourage anyone who is interested to get 
involved and go along to their nearest event and help out. 
In 天涯社区, 天涯社区, NEWW Wildlife and North Wales 
Wildlife Trust will be teaming up and leading volunteers on the River Alyn on 
Tuesday 23 June, Thursday 25 June, Thursday 2 July and Thursday 16 July.鈥
Meryl Norris, Dee Invasive Non-Native Species Project Officer said: 鈥淭he 
volunteer effort from the previous two years has made the event a real 
success.  The various 鈥榖alsam bashes鈥 taking part across the catchment are a 
great way to get out to some beautiful riverside locations and help tackle an 
important issue for conservation.
If you or your group would like to get stuck in with balsam bashing or knotweed 
whacking, or if you fancy spying on the alien invaders and recording their 
locations contact your local contact below  for more information about events 
happening in your area or check out www.facebook.com/BigDeeDayTheInvasion or 
www.dinns.org.uk.   
Local contacts
Cheshire 
Laura George
lgeorge@cheshirewt.org.uk
01948 820728
Snowdonia National Park
Gethin Davies
g.davies@eryri-npa.gov.uk 
01766 772255
Denbighshire/Clwydian Range & Dee Valley AONB
Rhun Jones
rhun.jones@denbighshire.gov.uk
01978 869618
天涯社区 
Lawrence Gotts 
lawrence.w.gotts@flintshire.gov.uk
01352 703263
Wrexham 
Liz Carding 
Liz.carding@wrexham.gov.uk
01978 292000
DINNS Project
Meryl Norris
merylnorris@wildlifetrustswales.org
07880 197942
Notes to editors:
You are invited to send a reporter and photographer to Rhug Farm in Corwen 
(LL21 0EH) for the official launch of Big Dee Day 鈥 the Invasion at 1 pm on 
Friday 26 June with staff, dignitaries and volunteers. 
Contact merylnorris@wildlifetrustswales.org 078 80197942 for more information.  
Image 
Meryl Norris (Dee INNS Project Officer, NWWT) demonstrating the stem injection 
treatment to control Japanese Knotweed at Ty Mawr Country Park in Wrexham 
during last years Big Dee Day - The Invasion. 
   
About the Big Dee Day The Invasion
The Big Dee Day The Invasion is a sister event to the Big Dee Day Clean Up 
event that has been held since 2008. The Invasion event began in 2013, when it 
was held over two days (28th & 29th June) and saw 17 events being held 
throughout the catchment. These events predominantly consisted of Balsam 
Bashing events 鈥 controlling the invasive plant Himalayan balsam.  2014 saw the 
event expand over the month of July with 40 events putting in up to 1680 
volunteer hours. 
The Big Dee Day The Invasion Steering group consists of the following 
organisations 鈥 Denbighshire CC, 天涯社区 CC, Wrexham CBC, Snowdonia National 
Park Authority, DINNS Project, Keep Wales Tidy, the Welsh Dee Trust, Clwydian 
Range and Dee Valley AONB, BASC and Natural Resources Wales.  
Dee Invasive Non-Native Project
The Dee Invasive Non-Native Species Project is a cross border catchment wide 
partnership project which aims to control invasive non-native species 
throughout the Dee catchment in England and Wales in a co-ordinated and 
holistic way. The project was initiated in 2012 following a workshop delivered 
by the Welsh Dee Trust. Following the setting up of the project steering group 
a strategic action plan was produced in 2013. 
The project works closely with organisations and volunteer groups to ensure 
they have the resources and knowledge to effectively control invasive 
non-native species and to also enable them to raise awareness of invasive 
non-native species and biosecurity. 
DINNS Project officer: Meryl Norris merylnorris@wildlifetrustswales.org 078 
80197942.  
Invasive non-native species
Invasive non-native species are species or animal or plant that have been 
brought to the UK from other countries and are having a negative impact on our 
environment, economy and well-being. These species cost the UK economy more 
that 拢1.7 billion pounds per year and are the second biggest threat to 
biodiversity globally. Species such as Himalayan balsam and Japanese knotweed 
increase erosion and impact on flooding; Giant hogweed contain sap which causes 
severe burns to skin upon contact; American mink have caused a sharp decline in 
our native Water vole populations leading to local extinctions; American Signal 
Crayfish carry Crayfish plague which kills our native White Clawed Crayfish and 
has led to dramatic declines in their population in the UK.