The Rivers Trust Conference 2025

The Rivers Trust’s Annual Conference in 2025 will examine the vast impacts of blue-green algal blooms on waterbodies whilst uncovering the root causes of how and why they occur, and the integral roles played by our rivers and catchments.

Blue-green algae are more and more present in news headlines, not least in relation to Lough Neagh, the UK’s largest lake. But this ecological disaster is anything but new and is increasing in frequency and severity. They are not actually algae, but a group of photosynthesising bacteria called cyanobacteria – microscopic organisms that naturally occur in freshwater bodies. When conditions are favourable, cyanobacteria proliferate to form the blooms that appear like algae, causing a range of subsequent problems that will only worsen in the future. Pollution from catchments and rivers can have significant impacts on waterbodies such as lakes, creating the perfect storm of conditions for blue-green algae to thrive.

The impacts of these blooms go well beyond them being an eye sore to our waterbodies; they affect tourism, recreation, fisheries, agriculture, and property values, all of which are essential components of sustainable social and economic development. This blanket of blue-green algae suffocates our water bodies by reducing oxygen and sunlight and releases harmful toxins, posing health risks to not just wildlife, but people too.

Whilst environmental and climatic factors like warmer temperatures, excess nutrients, and low rainfall are typically known as the key drivers for triggering algal blooms, ongoing scientific research highlights how the causes are mucsrivers h more varied and have been compounded over time. In fact, algal blooms are largely a symptom of systemic failures of land and sewage management, exacerbated by the increasing pressures of climate change. Unravelling the myriad causes of blue-green algae will help us to restore balance in our catchments and improve environmental health in the round.

This online conference will delve deeper into the features, causes and impacts of blue-green algal blooms on water bodies, communities, and the economy, as we try to mitigate their effects and find ways to reverse the factors causing their proliferation. Addressing the causes of blue-green algal blooms is no easy feat, and will require multi-disciplinary and multi-sectoral solutions at a whole catchment scale, but further understanding this is a step in the right direction.

Find out more and register

Leaders: Steve Jones and Jo Poland
Moving off from the meeting point at the bottom of the Fire Brigade Site, Tolvaddon, (SW657417) at 11.00am

Please note that if you are attending this event and would like to park at the bottom of the Fire Brigade site rather than up on the main road, as part of the registration process on the day you will need to give the registration number of your vehicle which will be shared with the Fire Brigade.

Our first Scrub Bash session of 2025 is also our first event at Great Wheal Seaton since the planning application for a mixed development of housing & small industrial units was submitted to Cornwall Council for the land immediately the other side of the Red River at Tolvaddon, (see our website for more details). Regardless of the whether that application is successful or not, it is more vital than ever that we keep our site in prime condition as it is not only the last remaining Scarce Blue-tailed Damselfly site in the valley, (and a potential reservoir for future expansion), but it is also recognised as one of the few permenant sites for the species in the country, thanks largely to our management.    So please come along and join us in clearing the regrowth of gorse, willow and alder that has relentessly sprouted again since last year! 

We have permission to park at the bottom of the Fire Station complex for this event but please park sensibly and with due regard for the need for access at all times by the Fire Brigade. Detail directions can be found below.

Remember to wear old clothes, it’s a messy job if you get carried a way and sparks from Gary’s bonfire will damage clothing if you get too close!!! Wellies are a must and don’t forget to bring a packed lunch. We will provide tools along with gloves and protective eyewear, however you are more than welcome to bring your own kit if you feel happier using that. For health & safety purposes we will be taking down contact details for all those attending.

You can see photos & read about the ongoing work at our Red River Valley sites, along with the species involved on the Red River Rescuers Facebook page here:  http://www.facebook.com/groups/redriverrescuers/     Why not register and get regular updates. Don’t worry if you’re not on Facebook, we have our own website where you can also read all about our activities here:    www.redriverrescuers.weebly.com

Sadly the Calciner chimney that graced the tin streaming landscape at Great Wheal Seton for over 150 years, watching it morph into a unique nature reserve, finally succumbed to the ravages of time & neglect during the storms of Bert & Darragh. You can watch a video of the stricken chimney here:   Red River Valley LNR – The demise of the Great Wheal Seton Calciner Chimney

Directions to Great Wheal Seton, (Tolvaddon):
If you are travelling in a westerly direction along the A30 from Redruth take the first Camborne (Tolvaddon) exit, signposted “Pool, Camborne, Portreath A3047”. After entering the slip road take the right hand lane signposted “Portreath” & then bear right as you drop down to the traffic lights. At the traffic lights turn right on to the dual carriageway and pass under the A30. Immediately after passing under the A30 turn left on to the minor road. After 60 metres you will pass the fire station, turn left onto the fire Brigade site and wind your way down to the bottom of the site where you can park sensibly.

If you are travelling in an easterly direction along  the A30 from Hayle take the second Camborne exit, signposted “Camborne, Portreath A3047”. After entering the slip road take the left hand lane. Immediately after the traffic lights at the Portreath junction, move into the right hand lane and take the next right, (if you pass under the A30 you have gone too far). After 60 metres you will pass the fire station, turn left onto the fire Brigade site and wind your way down to the bottom of the site where you can park sensibly.

The valley is a rich mosaic of wildlife habitats officially designated as a Local Nature Reserve, the whole area has huge untapped potential, but like so many areas, is badly in need of some conservation management. Come along and make a difference.