Japanese knotweed around Loch Fyne in Argyll

Debris on the beach

The waves are obviously spreading knotweed around the coast. Obvious really when you think about it.

Knotweed invading coastal habitats

Closer........

A hedge of knotweed and balsam

Beaver kit eating Japanese knotweed

Here is a beaver kit on the river Ericht outside Blairgowrie getting stuck in to the lower leaves of Japanese knotweed. Which of these causes the most problems on rivers?

Pity we did'nt get as much excitement about eradicating JapKnot and other invasives on the Tay as we did in recent years about the beavers.

Well done that Scottish- born beaver...!

Japanese Rockweed

We are used to seeing Japanese knotweed in gardens, on waste-ground, roadsides and along rivers, but a survey on the River Broom led to a rather unusual sight.  Over 10 stands of Japanese knotweed were found on this cliff-face, apparently carried there by a small watercourse.

The ones that got away

We have been busy controlling giant hogweed at several sites but overlooked a fairly big stand on the Longman landfill site.

Dressing up in full PPE was no fun on a hot day, and after cutting a few flowerheads, we decided to spray smaller plants around the edge of the colony, and come back next spring to deal with plants when they are a more manageable size.  Caution is the better part of valour.

Mink attack

Amazing footage of a mink raiding a kingfisher nest from tonights (06/06/12) BBC Springwatch, here is a link to the site which shows some stills of the attack but you will probably be able to watch again if you go to BBC iplayer.
Highlights how devastating a predator the mink can be wiping out a kingfisher nest in a matter of minutes.  This is the case for many ground nesting birds and water voles.
Link:
http://www.bbc.co.uk/blogs/natureuk/2012/06/kingfisher-mink-predation-last.shtml#more

One to watch

American skunk cabbage was introduced to Britain in 1901, and was first recorded in the wild in 1947. Skunk cabbage is a popular plant in water-gardens, and has been actively promoted by the gardening press. In 1993 Lysichiton americanus received an “Award of Garden Merit” from the Royal Horticultural Society (RHS) Floral Committee.

More recently, greater attention has been drawn to its invasive nature. In 2010, the Recording Invasive Species Counts (RISC) project asked the public to submit records of Lysichiton americanus. The RHS website now provides an online leaflet on invasive plants in which it recommends that gardeners should “Avoid using plants known to be invasive, especially in the case of non-native aquatic species”.

Nevertheless, Skunk cabbage is still praised as a garden plant. The online BBC Plant Finder describes it as “an asset in any bog garden”, and makes no mention of its ability to spread into the wild. Skunk cabbage is still widely available from plant nurseries.

Although it is less invasive than some non-native plants, it is dispersed readily by flowing water. A watchful eye is best kept on any populations which have escaped into the wild. Fortunately, it can be controlled relatively easily.

Note the mass of young plants close to the parents, suggesting that the seeds are not often carried far, unless by flowing water. In the Pacific regions of North America where Skunk cabbage is native, the seeds appear to be dispersed by animals.
However no bears were seen in this wood on the Morvern peninsula.

BREAKING NEWS! Asian Longhorn Beetle recorded for first time in the UK

"An outbreak of the Asian longhorn beetle (ALB), an exotic beetle pest which could have severe consequences for British trees, has been found in Kent the Food and Environment Research Agency confirmed today. This is the first time an outbreak of this pest has been found in the UK and it is being treated extremely seriously. Fera and the Forestry Commission are taking urgent steps to try to eradicate the outbreak before it has the chance to spread further afield."

"The beetle is not native to the UK, and poses a serious threat to a very wide range of broadleaved trees and shrubs such as maple (including sycamore), elm, horse chestnut, willow, poplar, birch and some fruit trees."

Read more here:

https://secure.fera.defra.gov.uk/nonnativespecies/news/index.cfm

New resource available to identify non native freshwater shrimps and isopods

"The Killer Shrimp is just one of the non-native crustaceans that arrived in Great Britain after invading into Europe. To help raise awareness of this and other species and support detection, Defra have funded the Freshwater Biological Association to produce an identification guide to existing and potential new invaders. "

Booklet is free to download from:

https://secure.fera.defra.gov.uk/nonnativespecies/news/index.cfm?id=77

Slaying the giants

The unmistakable leaves of Giant hogweed have appeared rapidly with recent warm weather.

Giant hogweed is best tackled early in the season, before it grows too tall and scary!
Roots can be severed with a sharp spade, unless the soil is very stony.

Alternatively, plants can be sprayed. Either way, it's advisable to treat hogweed before it becomes an unwelcoming jungle.

Clash of the Crayfish: Why the Americans Are Winning

Here is a link to a very interesting article highlighting reasearch that has been carried out by the University of Leeds on the affect of the invasive American Signal Crayfish on native White Clawed Crayfish in England and the freshwater ecosystems as a whole: http://www.sciencedaily.com/releases/2012/03/120315095519.htm

"Their study, published in the online journal PLoS One, compares how quickly the two different species deal with food. The American signal crayfish ate up to 83 per cent more food per day than did their native cousins. The research also

showed that white-clawed crayfish are much more choosy about what they eat, preferring particular types of prey, while the signals eat equal amounts of all prey. The white-clawed crayfish are also affected by a common parasite, porcelain disease, which affects their ability to catch prey, leading affected crayfish to eat 30% less. The American signal crayfish, on the other hand, seem unaffected by the parasite."

Here is the link to the published research paper: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0032229

The Economic Cost of Invasive-Non Native Species on GB

This is a report carried out by CABI (the same group who have been testing biological control agents for some invasive plants) on behalf of the UK government.

Not sure if this has been posted before but it certainly has some interesting figures which are worth quoting if you are ever having to justify INNS control work.

https://secure.fera.defra.gov.uk/nonnativespecies/downloadDocument.cfm?id=487

BREAKING NEWS!

KILLER SHRIMP FOUND IN THE BROADS!!

http://www.broads-authority.gov.uk/news/press-releases/2012/broads-water-users-urged-to-check-clean-dry.html

"Andrea Kelly Senior Ecologist for the Broads Authority said: ‘The shrimp were found through a dedicated monitoring programme. Fortunately we’ve only found the shrimp in a very localised area in the Broads so far. People checking, cleaning and drying their equipment after use is essential to help stop the spread of all non-native species and we would really appreciate their full cooperation in doing this."

If you can't beat them, eat them.......apparently. Not sure this is actually a good idea.

http://www.bbc.co.uk/news/uk-scotland-south-scotland-17113916

Ladybird decline driven by 'invading' harlequin

'Ladybirds native to the UK and other European countries are declining fast as the invasive harlequin species spreads, scientists have shown'

Follow the link to view the BBC news article: http://www.bbc.co.uk/news/science-environment-16916726

Biobullets for Zebra mussels

An interesting read through the following link to a BBC news article on a control technique for Zebra mussles:

http://www.bbc.co.uk/news/business-16788183

UK Crayfish website

Visit the Buglife UK Crayfish website to find out about all crayfish species present in the UK. There is lots of info on Non Native crayfish

http://www.buglife.org.uk/conservation/currentprojects/Species+Action/UK+Crayfish+Website/Crayfish+for+professionals/Non+native+crayfish+and+disease

Be a citizen scientist and stop the spread of invasive species in Britain

'The Observer Ethical awards have teamed up with the University of Hull to help record data on invasive species, so that scientists can monitor their spread and their effect on their local environment. The list of Britain's top 10 unwanted non-native invasive species is listed below. Over the next few months we're asking you to keep an eye out for these species and to photograph and catalogue whenever you can, sending this vital data off to the organisations listed in each box'

http://www.guardian.co.uk/environment/gallery/2012/jan/15/citizen-scientist-invasive-species-pictures

'Invasive non-native species: Attack of the Aliens'

A recent article from The Observer on INNS. Very good in my opinion!

http://www.guardian.co.uk/environment/2012/jan/15/invasive-non-native-species-extinction

Scottish Mink Initiative update

http://web83.extendcp.co.uk/scottishmink.org.uk/news.html

Click on the link to view the Scottish Mink Initiative Dec 2011 newsletter. Includes updates from all project areas and details of upcoming events.

'Waging war on rhodies'

Follow the link to view the recent article from Trout and Salmon magazine on the Rhododendron clearance project currently underway on the River Orrin.

http://www.rafts.org.uk/conon-restoration-trout-salmon/