Daniel Buttner, Nelson Mandela University, Botany Department, Ocean Science Campus, South African Environmental Network (SAEON), Elwandle Coastal Node, Port Elizabeth, South Africa; South African Environmental Observation Network (Elwandle Node), Port Elizabeth, South Africa, Lucienne Human, South African Environmental Observation Network (SAEON), Elwandle Coastal Node, Nelson Mandela University, Institute for Coastal and Marine Research, Ocean Science Campus, Port Elizabeth, South Africa, Thomas G Bornman, South African Environmental Observation Network (SAEON), Elwandle Coastal Node, Institute for Coastal and Marine Research, Nelson Mandela University, Ocean Science Campus, Port Elizabeth, South Africa and Janine Adams, Nelson Mandela University, Institute for Coastal and Marine Research, Department of Science and Innovation/National Research Foundation Research Chair (SARChI) for Shallow Water Ecosystems., Port Elizabeth, South Africa