Japanese knotweed?

Riversearch June 2016: Alien invader – Japanese Knotweed

The main challenge with my Riversearch survey in June was seeing the river – since my previous survey, the plants along the riverbank. have shot up. There were stinging nettles taller than me, and inpenetrable thickets of bramble blocking me from getting close to the river in many places. Still, I did manage the occassional glimpse of the river – enough to see that, though the river level was normal, it was still quite turbid.

Intriguing holes in the riverbank

There weren’t any particularly exciting wildlife sightings to report, although I did spot some intriguing holes.

 

I did see a couple of invasive non-native species –  Himalayan balsam, as usual, and a probable sighting of Japanese knotweed. This is the first time I have spotted Japanese knotweed along by the river, and I had to use binoculars from the opposite bank to see it, so I’m not 100% sure about my identification. But I’ve shared the photos with the wildlife trust, who seem to think it is knotweed. I don’t know if it’s new here, or if I spotted it this time and missed it previously because I was doing my stretch in the opposite direction to normal. Anyway, that’s now been reported to the National Trust, who own the land, so hopefully they’ll be able to sort it out swiftly.

Japanese knotweed?

Japanese knotweed doesn’t look particularly startling (unlike Giant Hogweed), but it can be a big problem, spreading quickly and hard to get rid of. In urban areas it can grow up through patios or conservatory floors, so it’s not something you want in your garden. In the countryside it can quickly overwhelm native species.

Advertisements

What do you think?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s