Sandberg R. N. (2013) The response of biological communities to natural and anthropogenic habitat fragmentation in South Outeniqua Sandstone Fynbos, South Africa  Stellenbosch University

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SANParks (2009) Monitoring and surveillance of environmental indicators in Tsitsikamma National Park SANParks

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Scharler U. M. & Baird D. (2005) A comparison of selected ecosystem attributes of three South African estuaries with different freshwater inflow regimes, using network analysis Journal of Marine Systems 56: 283–308

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Schutte-Vlok A., Huisamen J., Nieuwoudt H. & Cleaver-Christie G. (2012) Keurbooms River Nature Reserve Complex Management Plan 2013 – 2018 CapeNature

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Rebelo A. J., Morris C., Meire P. & Esler K. J. (2019) Ecosystem services provided by South African palmiet wetlands: A case for investment in strategic water source areas Ecological Indicators 101: 71–80

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Russell I. A. (2003) Changes in the distribution of emergent aquatic plants in a brackish South African estuarine-lake system African Journal of Aquatic Science 28: 103–122

Keywords: Aqautic plans, Estuary, Lake, Wilderness, Management, Monitoring, Phragmites australis, Juncus Kraussii

Russell I. A. & Kraaij T. (2008) Effects of cutting Phragmites australis along an inundation gradient, with implications for managing reed encroachment in a South African estuarine lake system Wetlands and Ecological Management 16: 383–393

Keywords: Aquatic plant management, Biodiversity conservation, Cutting, Encroachment, Flooding, Local eradication, Non-tidal, Saline

Russell I. A., Randall R. M., & Kruger N. (2010) Garden Route National Park, Knysna Coastal Section, State of Knowledge SANParks

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Russell I. A., Randall R. M., Cole N., Kraaij T. & Kruger N. (2010) Garden Route National Park, wilderness coastal section, State of Knowledge Report SANParks

Keywords: GRNP

Omarjee A., Taljaard S., Ramjukadh C. L. & van Niekerk L. (2021) pH variability in catchment flows to estuaries – A South African perspective Estuarine, Coastal and Shelf science 262: 107605

Keywords: River inflow, Alkalinity, Electrical conductivity, Geology, Vegetation, Anthropogenic pressures