Welcome to the first part of our exhilarating journey, as we delve into the thriving underwater world beneath the Thames Estuary. Our adventure begins at Battersea Reach, just east of the River Wandle's mouth, where TEP's Data and Training Manager Wanda Bodnar guides us through the essential work being carried out in this unique estuarine environment.
We start by uncovering the significance of Estuary Edges, an innovative approach to enhance biodiversity along the edges of the estuary. These man-made vegetated intertidal habitats act as crucial ecosystems for fish and other wildlife, rejuvenating the estuarine edges and promoting a healthier environment.
But why are these sites so important, you ask? Wanda delves into the historical transformations that the Thames Estuary has undergone over the past 2,000 years, leading to the loss of vital habitats. These habitats, like saltmarshes, seagrass areas and reedbeds, have a far-reaching impact, not just on the wildlife but also on our daily lives. They reduce flood risk, act as carbon sinks, and provide crucial nursery and spawning grounds for fish. In a world where the sea levels are rising, they play an indispensable role in safeguarding the environment.
The aquatic life in the Thames Estuary is as diverse as it is fascinating. From the freshwater zone upstream from Battersea to the brackish waters downstream to Greenwich and the predominantly salty waters beyond, the fish species are ever-changing, depending on weather, season and tidal cycles. In 2017, the last survey at this site revealed the presence of European seabass, common goby, and the critically endangered European eel. These species contribute to the intricate web of life within the estuary, and with our seine nets, the survey yielded a total of 54 fish comprising of eight different species, including zander, goby, seabass, dace and bream. Additionally, a single European eel was caught during the fyke net operation.
Steve Colclough, Fisheries expert, provides insights into the fish surveys and the equipment used. But it doesn't stop at just catching fish; Steve takes us through the identification process and explains the importance of the data collected. This valuable information is shared with partner organisations, including the Port of London Authority, Environment Agency and the Institute of Fisheries Management. The data helps demonstrate the ecological benefits of these habitats, underlining the significance of the Estuary Edges.
But the Thames Estuary is not just about fish; it's a bustling hub of wildlife. Over 300 species of invertebrates, 96 species of birds, three species of mammals and even sharks call this estuary home. It's a testament to the richness of this ecosystem, with species like the tope, starry smooth-hound and spurdog patrolling the outer estuary.
So, join us on this exploration of the hidden wonders of the Thames Estuary, where every dive into its waters reveals something extraordinary and where the ongoing efforts of dedicated individuals like Wanda and Steve are helping us better understand and protect this remarkable environment.
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Talk of the Thames has been brought to you by the Thames Estuary Partnership https://www.thamesestuarypartnership.org/
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Produced & Presented by Chloe Russell.