Regarding the initial topic, there are two obvious (and very important) points that stand out to me.
First of all - wholesale tree clearance right down to the bankside is a complete vandalism of the river. It is likely to destabilise the banks, increase erosion (and hence choke spawning gravels with fine silt and sand from soil). This means that the river will become wider, shallower and more boringly uniform as a result. This uniformity will reduce the fish holding capacity of the reach. In addition, the lack of bankside cover for fish to shelter under will further reduce the fish holding capacity. It will also mean that salmonid fish are less likely to spawn in that reach (because there is no cover for the fish that are waiting to spawn). Appalling management!
The second point is that, despite efforts to preach the true message, many anglers and fishery managers do not appreciate the huge value of (stable) large woody debris (i.e. trees, logs and root boles) IN rivers and streams. Removing the source of Timber (or pulling it out after it falls in) from rivers is one of the key man-made interventions that REDUCES salmonid productivity in rivers. In an un-impacted river system - there is a natural sequence of trees cracking and falling into rivers. These lumps of wood fetch up and generally stabilise in appropriate positions. Here they cause the river to generate wonderful scoured out holding pots as well as throwing up plumes of lovely clean spawning gravels. The wood also provides physical shelter for fish and invertebrates. Please see the post "Glorious Good Wood" on my blog for a little more on Large Woody Debris (LWD):
http://urbantrout.blogspot.com/searc...&max-results=7
So - an improved management practice for the river in question would be:
1.) Coppicing some selected trees on a rolling rota so that there are always trees of various ages (coppiced trees grow back!) to provide a balance of dappled light (sufficient to support weed growth). A balance of 60:40 light:shade is a good rule of thumb. The shade will provide protection against high summer temperatures and low overhanging branches (plus low scrubby coppice re-growth) will provide vital cover for migratory and non-migratory fish alike. DO NOT CUT THEM ALL DOWN AT THE SAME TIME!
2.) Use the timber that arises from coppicing by pinning it securely into the river bed at strategic points to a.) generate localised scour and produce clean spawning gravels b.) protect sensitive banks from excessive erosion.
The Wild Trout Trust (
www.wildtrout.org) will come, on invitation, and provide FREE ADVICE and where appropriate FREE PRACTICAL DEMONSTRATIONS of these techniques tailored to the appropriate needs of your own river. We don't discriminate between clubs that are wild fisheries, or whether stocking occurs to support catch and kill. We provide balanced advice that preserves crucial migratory and non-migratory salmonid stocks. The only costs to the recipients of such Advisory and Practical visits are petrol money for the conservation officer that provides the service.
If you'd like us to continue to provide this FREE OF CHARGE SERVICE, please consider joining the WTT (it costs you 67 pence per week). So even if you aren't able to work on protecting fish habitat yourself - your contribution means that we can do it for you. Membership forms here:
www.wildtrout.org