Winter marks the beginning of the tree management programme for the River Stour Internal Drainage Board. The majority of the trees are trimmed back or removed to allow access to machines which de-silt the river. De-silting generally takes place every 10 years and is done so that drainage ditches maintain their capacity to hold a certain volume of water and cope with winter rainfall.
Nowadays ditches are partially de-silted with the central channel cleared and banks left untouched. This is a much gentler approach than in the past where banks were scraped destroying water vole burrows and removing native flora.
Trees may also be removed if they are deemed to be a safety hazard. One particular tree that caused an issue this year was a black poplar which had a dead limb directly above a sluice structure. The IDB felt this could present a hazard to staff checking the structure and wished to remove the limb but inspections revealed several features which could potentially contain bat roosts. Josh, our resident aboriculturalist, did not feel the tree was safe to climb so investigating with an endoscope was not possible and therefore we could not give the go ahead for the IDB to undertake the limb removal.
Further investigations are now being undertaken by the IDB to rule the tree out as a bat roost before they proceed with the removal of the limb.
Towards the end of the year our work took us to Langenhoe on the Essex Coast to undertake a WeBs count on behalf of Brooks Ecological Limited. WeBs stands for Wetland Bird Survey and the counts. which take place either side of high tide monitor non breeding water birds and are used to identify trends and distribution of waterfowl and waders. We are hoping to take more trips out to the RAMSAR protected Essex coastline in the coming months.
Lastly, this month, Carol Donaldson has been busy writing about wildlife for various publications including The Clearing and The Guardian. Read her article on the North Kent Marshes here.