It was a chilly morning today but the light was beautiful on the Water of Leith in Colinton Dell
Water of Leith Conservation Trust as she was setting off to survey the river invertebrates. She said then that she felt that there weren't many invertebrates in the river and she wanted to check. I bumped into her again today and she confirmed that her survey had shown that levels of invertebrates were well down on usual for the time of year. Even more oddly, this result comes after last year being a real high for river invertebrates! Ruth had been finding loads of mayflies, caddis flies and other species in all her surveys and general observations last year and I noticed a lot of mayflies and other species flying above the river whenever I was in the Dells. The other odd thing is that this part of the river is upstream from the flood prevention works, which might be expected to impact on invertebrate life downstream.
So the trust are hoping that a post graduate student will take on a detailed survey of the river's invertebrates and feed these results into SEPA (the Scottish Environmental Protection Agency) who may be able to trace a cause and / or offer solutions.
The dippers were chasing each other excitedly today and will be building their nests soon. I hope there will be enough invertebrates in the water for them to bring up the next generation!
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