connectivity

The results are in: barriers down, fish up

I’ve been looking forward to this moment for quite some time now…..well, at least a year. The monitoring of my pet project from pre-intervention (weir notching and removal / partial demolition over six structures) to several years post is quite revealing, and I’ll let the data do the talking.

Connectivity at Coniston Cold

And so it comes to pass….Coniston Cold weir, which in various forms has been a man-made obstruction to fish passage on the R Aire in N Yorkshire for the past 180 years at least, is no more. Instead, there is now 20.4km of uninterrupted free passage along the Aire and a major tributary.... and all for less than £8k!

A weir'd way to travel

World Fish Migration Day is a biennial event and this year falls upon the 21st April. If you have not heard of it, it’s a global-local event to create awareness of the importance of open rivers and migratory fish. Check out some of the events that are going on around the world - there may be something near to you:

Capturing Catchment Connectivity Issues

Here at WTT, we're (no pun intended!) all for reconnecting fragmented systems: see recent news items from Tim Jacklin's work on letting the Dove flow, applications of Mike Blackmore's patented #weirbegone, or some of my recent work with Air

Land and lake interconnectedness

On a day-to-day basis, most of my time as WTT Research & Conservation Officer is devoted to river habitats, but in my academic role at the Lancaster Environment Centre, lakes are a long-standing focus of my aquatic ecology research.

Easements on Eastburn

A number of my blog posts have featured Eastburn Beck. It’s my pet project because it is the first that I cut my teeth on after moving to Yorkshire, because I live overlooking its headwaters and hence it is a very easy and accessible site for me to monitor. It is also exciting because it has ably demonstrated the value of partnership working, and how with critical mass, relatively small habitat improvements are snowballing both up and downstream from the original work plans as word spreads; this is quite typical for projects that the WTT is involved with!

Restoring longitudinal connectivity: a more holistic approach

Anyone who knows anything about fish in the UK will surely know Dr Martyn Lucas, the head of the Aquatic Animal Ecology Research Group within the School of Biological and Biomedical Sciences at Durham University. He’s an absolute legend and all round good bloke with whom I have done some research in the past. From amongst the many projects he is involved with, his group has published two papers this year revolving around fish passage issues.

Food web responses to habitat rehabilitation

Connectivity is a recurrent theme of my blog posts. Last year I wrote about plans for notching some of the redundant low mill weirs on a tributary of the River Aire, local to me.

Coping with climate change

After the winter spates and ‘unprecedented’ flows rearranged much of the substrate of my local river, the Aire in N Yorkshire, there has been virtually no rain since. Consequently, it is already at late summer level, and the lack of energy has allowed thick scums of bacteria and other microbes to develop on the bed. The lethargy of some of the trout seems to reflect that of the river. And the forecast is for a hot summer, allegedly.

Making Connections

Man-made barriers, obstacles, call them what you will, are commonplace along our waterways as we have (typically) in the past tried to harness or control the flow of water for our own use.

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