Essex Rivers Hub

Invasive species such as Himalayan Balsam, Floating Pennywort, Parrots Feather, New Zealand Pygmy Weed, American Mink, Chinese Mitten crab and many more can be very damaging to the river habitat by dominating banks, which limits the number of native species that grow, leaving bare banks over winter increasing the amount of sediment that enters the channel, killing native species or undermining banks.


In order to determine the number of invasive species that are found along the Mardyke the area would need to be surveyed at the appropriate time of year and the location of these species determined. This will determine the level of control need for these species.

In some cases this will involved community help and landowner engagement.


River Mardyke

WFD water body status


WFD overall status objective

Aim to achieve good status by 2027

Project type

Control of invasive species

Benefiting species and/or habitats

Improved habitat for native species

Project lead

Jane Herbert

Contact for more information

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Project partners

Essex Wildlfie Trust, Essex Biodiversity Project, the Environment Agency

Funding source

None at present.

Website key stakeholders:

Environment Agency logo      Essex Wildlife Trust logo           

Design by LTD Design Consultants and build by Garganey Consulting based on an original concept by Herts and Middlesex Wildlife Trust