Greetings Burhan, FM, I was sampling below the legendary North Outfall at Trefforest Ind Est but all appears well thank goodness. The shrimp life fluctuates a lot from year to year but I'm not sampling consistently enough to draw any conclusions from these changes - I monitor the edge of the river in high or low water depending on how much time (or motivation) I have. Sampling exactly the same area of river bed on such an endlessly moody river as the Taff can prove to be a elusive ideal for an amateur.
Even during the long droughtshown in the graph above there were very good hatches at a time when pollution would have made itself very apparent.During this spell the Taff ran pretty clear while the Teifi went to nitrate soup. The fact is there's very little industry left along the Taff, it's agriculture that's the main culprit for pollution in Wales yet it's very lightly regulated compared to that which is imposed on the remains of the factories.
As for climate change I'd say global corming was more of a threat to the Taff's fish at the moment but thanks for the mention - you're not after a grant are you FM?
I'll post a few more snaps to fill up these long dark nights unless anyone's up for some night fishing for grayling, it's the in thing doncha know!
Blue Winged Olive nymphs
). there were olives or something hatching but definitely not what i was seeing in the summer.
) The nymph/adult season of the bwo is comparatively short....although Glen Pointon did show me some legitimate pics of duns found emerging on the Wye in December! 
Linear Mode
