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A Bloomin’ Disaster: The causes and costs of blue-green algae

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

 

 

Other

Requirements
Registering required.
Contact
events@theriverstrust.org
Date:
Saturday, 22 February 2025
Time:
11:00 am - 2:00 pm
Event Category:

A day of Practical Conservation Work at Bell Lake Marsh, part of the Red River Local Nature Reserve near Camborne

Saturday 22nd February 2025

Leader: Steve Jones
Moving off from the meeting point at the bottom of Cuttings Hill, (SW629422), at 11.00am

Thank to everyone who came along to our well attended scrub bashing session at Great Wheal Seton, thanks to your efforts the habitat is looking in excellent condition for the year ahead. Sadly the same cannot be said for the land immediately the other side of the river where the proposed Tolvaddon Development rumbles on. If you didn’t manage to get along to the January scrub bash you can watch a short film about the issues facing Great Wheal Seton by using the link below.

Our next session will be back at Bell Lake Marsh where there is still a lot of work to do! As always there is plenty of willow, birch, gorse & reedmace regrowth to tackle so don’t be shy with those loppers and bow saws.

 

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

Here is the link to the short film, “Great Wheal Seton, Wildlife Habitat on the Edge”:

https://youtu.be/DvnDEmYpNtI?si=lyEkj858jL53CTIp

 

Directions to Bell Lake Marsh: Leave the A30 dual carriageway at the Camborne West exit (Treswithian). 

If you are travelling in a westerly direction turn left at the end of the slip road and go all the way around the roundabout and back along the same road to cross over the A30 before turning left on to a minor road heading for Reskadinnick. After a quarter of a mile you will pass Camborne/Treswithian Downs Crematorium on your right and shortly after that you should turn right (which in effect is straight on) heading for Bell Lake/Coombe, (do not take the turning for Reskadinnick). Follow this road for half a mile, it will then drop down a steep hill, park at the bottom along the entrance to the track on the right or just after the river bridge.

If you are travelling in an easterly direction turn left at the end of the slip road & immediately left again on to a minor road heading for Reskadinnick. After a quarter of a mile you will pass Camborne/Treswithian Downs Crematorium on your right and shortly after that you should turn right (which in effect is straight on) heading for Bell Lake/Coombe, (do not take the turning for Reskadinnick). Follow this road for half a mile, it will then drop down a steep hill, park at the bottom along the entrance to the track on the right or just after the river bridge.
Please park sensibly and do not obstruct vehicular access along the track.

Bell Lake Marsh is one of the best remaining dragonfly sites along the Red River Valley, supporting breeding colonies of the nationally scarce Small Red Damselfly & Keeled Skimmer. In the last 10 years it has lost it’s colony of the Scarce Blue-tailed Damselfly & during the last 30 years it has lost a Marsh Fritillary colony. Our aim is to reverse the decline of this important wetland habitat by removing invasive willow, gorse, birch saplings & lesser reedmace, opening up the site with a series of work parties over the autumn & winter. Please come along and lend a hand with this very worthwhile task, it will keep you fit while you have fun & enjoy a bit of constructive destruction!

Start:
5 July @ 10:00 am
End:
6 July @ 5:00 pm
Cost:
£220
Event Category:
Location:
Preston Montford Field Centre
Montford Bridge Shrewsbury SY4 1DX United Kingdom
Venue Phone:
01743 852040
Venue Website:
View Venue Website

Organiser:

Phone:
01743 852100

This beginner course on dragonflies and damselflies is aimed at all those with a desire to learn more about identifying these stunning insects. Open to all levels of ability, we aim to introduce you to a number of dragonflies and damselflies close-up so that you will be confident in your abilities to identify them and make species records.

This course will include:

  • An introduction to dragonflies and damselflies and understanding the differences between them. 
  • Classroom workshops on the identification of both dragonflies and damselflies.
  • Hands-on practice (weather permitting) netting and identifying dragonflies in the field.
  • An explanation of how to take your interest further and actively contribute to the conservation of dragonflies and damselflies by making biological records.

Full information on the FSC website.

 

Image: Southern Hawker by Bruce Hyde

Other

Requirements
Booking required.
Additional Info
Course leader: Sue Rees Evans (Shropshire County recorder for Dragonflies).
Meet
Preston Montford
Contact
biodiversity@field-studies-council.org
Date:
Saturday, 25 January 2025
Time:
11:00 am - 3:00 pm
Event Category:

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.

Date:
Saturday, 25 January 2025
Time:
12:00 pm - 4:00 pm
Event Category:
Event Tags:

Organiser:

Phone:
07768 452365

 

Our annual social meeting, hosted by Bill & Chris at Bordon, for HSBG members.

We’ll be planning our Field Meetings for 2025, discussing species, sites, research, conservation and possibly even foreign trips.

Other

Requirements
Lunch provided from 12 Midday. Please bring drink.
Start:
Thursday, 9 January 2025
End:
10 January
Cost:
Free – £50
Event Category:
Event Website:
https://orfc.org.uk/
Location:
Wesley Memorial Methodist Church
New Inn Hall Street
Oxford, Oxfordshire OX1 2DH United Kingdom
Venue Phone:
01865243216
Venue Website:
View Venue Website

Every January the Oxford Real Farming Conference connects people in the UK and around the globe who want to transform our food and farming system.

Here are a few of the themes you’ll find in the programming at ORFC 2025:

FARM PRACTICE: There’ll be lots of great take-home advice, deep dives into the success and challenges of individual farms, and practical discussions on topics such as natural flood management, activating soil enzymes, pest control, and biodiversity and livestock. The farm practice strand is organised in collaboration with Soil Association and Pasture for Life.

FOOD AND FARM POLICY: For everyone impassioned by the politics of food and farming, we’ve selected a brilliant series of policy focused sessions with Sustain and the Soil Association. What are the practical political tools that can be used to achieve transformation? Come along to sessions looking at all facets of the just transition: from creative ways to fund it, to moving beyond intensive livestock; and for discussions on public farmland, pesticide policies, ecocide law, agri-misinformation in elections, ELMs, and more.

JUSTICE STRAND: The Justice Strand, hosted by Solidarity Across Land Trades (SALT), Shared Assets and Seeding Reparations, invites those from marginal perspectives to connect, share knowledge and empower each other. Sessions centre on equity, solidarity and collaboration and explore topics such as: land access, reparations, abolition, health justice, racial justice, queer liberation, neurodiversity, alternative economies, migration, workers’ rights and anti-oppression.

LANDWORKERS ALLIANCE AND LA VIA CAMPESINA: La Via Campesina (LVC) is a global grassroots ‘movement of movements’ representing over 200 million peasants, farmers, pastoralists, fisherfolk and Indigenous people across 81 different countries. The Landworkers’ Alliance is a member organisation of LVC, and works to build the movement for agroecology and food sovereignty across all four nations of the UK. This year, the LWA x LVC programme will bring together landworkers, young people, trade unionists, and activists from the UK and internationally to explore what it means to be a social movement and why building a social movement is key to achieving agroecology.

LISTENING TO THE LAND: this strand explores what it means to have a more reciprocal relationship with Nature and how a heart-based approach to our work might support and progress the transformation of our food and farming system. Working with partners, the Conscious Food Systems Alliance (CoFSA) and Animate Earth, you will find various sessions seeded through the programme that explore traditional or indigenous knowledge systems, farming practices based on an intuitive relationship with the land to establish a more embodied connection to landscape.

YOUTH: In partnership with Emergent Generation, La Via Campesina, and FLAME, we’re hosting youth-oriented sessions across the conference this year. There will be space for youth movement collaboration, intergenerational discussions, art exhibitions, and relaxed networking. Later, there’ll be a relaxed roundtable on inspiring more youth to join activist movements, before an evening drinks where newcomers passionate about the politics and practice of food and farming will have a chance to meet movement leaders.

SOCIALS AND ENTERTAINMENT: We’ve got plenty of social opportunities – from landmatching lunchtime gatherings to evening socials for our LGBTQIA+ community, food and farming newcomers, and journalists. We’re excited to be hosting wonderful live music, poetry and storytelling performances in the evenings.

Other

Requirements
Booking required.
Contact
info@orfc.org.uk
Date:
Saturday, 28 December 2024
Time:
11:00 am - 2:00 pm
Event Category:

A day of Practical Conservation Work at Bell Lake Marsh, part of the Red River Local Nature Reserve near Camborne

Saturday 28th December 2024

Leader: Steve Jones
Moving off from the meeting point at the bottom of Cuttings Hill, (SW629422), at 11.00am

Thank to everyone who came along to our last scrub bashing session at Bell Lake Marsh at the end of November. The rain held off and lots of the bank at the edge of the marsh was cleared of gorse, which will hopefully benefit the many mining insects that use the site. Across the marsh itself we continued to make good progress clearing willow, alder & birch regrowth while at least eight Snipe and a few Palmate Newts, Common Frogs & Water Scorpions popped up to see what was going on.

Our traditional Christmas session we will end a little earlier than usual at 2.00pm, but there will be the usual mix of calorie busting willow, birch, gorse & reedmace regrowth to tackle for those who find the bathroom scales groaning a little more loudly than usual!

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

 

Directions to Bell Lake Marsh: Leave the A30 dual carriageway at the Camborne West exit (Treswithian). 

If you are travelling in a westerly direction turn left at the end of the slip road and go all the way around the roundabout and back along the same road to cross over the A30 before turning left on to a minor road heading for Reskadinnick. After a quarter of a mile you will pass Camborne/Treswithian Downs Crematorium on your right and shortly after that you should turn right (which in effect is straight on) heading for Bell Lake/Coombe, (do not take the turning for Reskadinnick). Follow this road for half a mile, it will then drop down a steep hill, park at the bottom along the entrance to the track on the right or just after the river bridge.

If you are travelling in an easterly direction turn left at the end of the slip road & immediately left again on to a minor road heading for Reskadinnick. After a quarter of a mile you will pass Camborne/Treswithian Downs Crematorium on your right and shortly after that you should turn right (which in effect is straight on) heading for Bell Lake/Coombe, (do not take the turning for Reskadinnick). Follow this road for half a mile, it will then drop down a steep hill, park at the bottom along the entrance to the track on the right or just after the river bridge.
Please park sensibly and do not obstruct vehicular access along the track.

Bell Lake Marsh is one of the best remaining dragonfly sites along the Red River Valley, supporting breeding colonies of the nationally scarce Small Red Damselfly & Keeled Skimmer. In the last 10 years it has lost it’s colony of the Scarce Blue-tailed Damselfly & during the last 30 years it has lost a Marsh Fritillary colony. Our aim is to reverse the decline of this important wetland habitat by removing invasive willow, gorse, birch saplings & lesser reedmace, opening up the site with a series of work parties over the autumn & winter. Please come along and lend a hand with this very worthwhile task, it will keep you fit while you have fun & enjoy a bit of constructive destruction!

Start:
Wednesday, 2 July 2025
End:
3 July
Event Category:
Location:
Lannock Farm
Hitchin Rd, Weston
Hitchin, Hertfordshire SG4 7EE United Kingdom
Venue Website:
View Venue Website

Organiser:

Phone:
01462 790 219

The Groundswell Festival provides a forum for farmers, growers, or anyone interested in food production and the environment to learn about the theory and practical applications of regenerative farming systems.

Date:
Saturday, 22 March 2025
Cost:
Free
Event Category:
Location:
Online

Click here to register for free

This will be an online event held over Zoom open to members and non-members. It will be free but donations are welcome.

The full programme will be confirmed shortly so please keep an eye on this page.

 

Confirmed Speakers

 

Dragonflies on the Bog ~ Scott Shanks, Scotland Project Officer

Meet our newest team member and learn about our exciting new project targeting Scotland rare bog dragonflies.

 

Understanding predator-prey dynamics in a changing world: insights from damselfly and crayfish interactions ~ Szymon Sniegula, Institute of Nature Conservation

How do invasive alien predators shape the fitness traits of native prey across life stages? Can native prey adapt to the combined effects of biological invasions and climate change? This seminar explores the evolving predator-prey dynamics between the blue-tailed damselfly Ischnura elegans and several crayfish species, focusing on how non-consumptive effects (NCE) from native, alien, and invasive alien crayfish influence prey life history and physiology. By comparing the NCE of different predator types, we examine how seasonal time constraints and warming affect damselfly responses. Additionally, we investigate whether and in what direction macro- and microgeographic variation drive differences in antipredator strategies across egg, larval, and adult stages. This work highlights the importance of integrating ecological, physiological, and evolutionary perspectives for effective conservation in an era of global change.

 

Priority Sites in Devon ~ Dave Smallshire, author and Devon County Dragonfly Recorder

Priority Sites’ support viable populations of important species, as determined from detailed records of dragonflies. The process of identifying them will be described, followed by the results for Devon over the past 40 years.

 

European Red List: moving from assessment to conservation planning for Odonata ~ Geert De Knijf, Institute for Nature and Forest Research

The recent reassessment of the 142 Damselfly and Dragonfly species in Europe resulted in the categorization of no less than 29 species (or 21%) as threatened. Nearly all red list species are confined to Mediterranean streams and rivers, or small nutrient-poor waterbodies, such as bogs. The aim of the Assess-to-Plan (A2P) for the European Red List Odonata project is to strengthen the connection between the red list process (the assessment) and conservation action on the ground, through planning. Building from the reassessments and additional knowledge and views of +30 European experts, we developed a preliminary action plan for the species categorised as threatened, using the A2P and multi-species conservation planning approach developed by the IUCN Conservation Planning Specialist Group. Here we present the most important actions for both groups of species.

 

Dragonfly Conservation Europe ~ Roy van Grunsven, Dutch Butterfly Conservation

Research on dragonflies has a long history in Europe and in many countries, there are organisations studying dragonflies. There has been an informal network of European odonatologists with a biannual congress, ECOO. However, there was no formal organisation. In order to help put dragonflies on the agenda at a European level and promote collaboration between odonatologists in different countries, Dragonfly Conservation Europe was founded in 2024.

 

Conservation of Dragonflies: Sentinels for Freshwater Conservation ~ Michael J Samways, Author and Professor at Stellenbosch University

Conservation of Dragonflies: Sentinels for Freshwater Conservation is a new publication for naturalists, citizen scientists, entomologists and conservation scientists, as well as practitioners and policymakers around the world.

Dragonflies are among the most familiar and popular of all insects, deeply embedded in human cultural history. They are iconic and tell us much about the environments in which we and they live. Their conservation is an important part of biodiversity conservation.

Purchase your copy from the NHBS store.

 

Dragonfly research and conservation in France: national monitoring initiatives and Dragon project ~ Martin Jeanmougin, Dragon Project Manager; Renaud Baeta,  ANEPE Caudalis, French association of Centre-Val de Loire, Sogap project manager; Valérie-Anne Lafont, Project Manager of the National Action Plan for Dragonflies, OPIE

Highlighting some national dragonfly monitoring initiatives and research project taking place across the channel. STELI, SOGAP and CIMaE monitoring programs will be presented through their complementarity. Dragon project, which began in 2023, is using opportunistic and standardised data to investigate species distribution and population trends, as well as potential causes and drivers of change and variation.

Programme

09:30 Welcome
09:45 Priority Sites of Devon
10:15 Understanding predator-prey dynamics in a changing world: insights from damselfly and crayfish interactions
10:45 Break
11:00 Dragonfly research and conservation in France: national monitoring initiatives and Dragon project
11:30 Dragonflies on the Bog
12:00 Break
12:15 Q&A morning speakers
12:45 Lunch
13:45 European Red List: moving from assessment to conservation planning for Odonata
14:15 Dragonfly Conservation Europe
14:45 Break
15:00 Conservation of Dragonflies: Sentinels for Freshwater Conservation
15:40 Q&A afternoon speakers
16:10 End

 

Other

Requirements
Booking required
Contact
eleanor.colver@british-dragonflies.org.uk
Start:
Sunday, 10 August 2025
End:
15 August
Event Category:
Location:
Columbia
United Kingdom

More information to come.

Other

Contact
webmaster@worlddragonfly.org