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Acknowledgements 1 Introduction 2 The recreational and human health costs from declining water quality in the Swartkops estuary, South Africa 3 Improving water quality in the Swartkops estuary: Impacts on ecosystem services 4 Economics of water hyacinth removal in the Swartkops estuary 5 The economic benefits of removing Spartina alterniflora from the Great Brak estuary 6 The economic benefits of restoring Knysna estuary following the 2017 Great Fire 7 Discussion and summary of findings |