You are not permitted to download, save or email this image. Visit image gallery to purchase the image.
The ability of New Zealand's freshwater ecosystems to cope with land use intensification will be debated at a national conference in Dunedin.
The New Zealand Freshwater Sciences Society's annual conference will be held at the University of Otago from December 3-7.
Conference convener Assoc Prof Gerry Closs said about 200 people had registered.
The first day, open to the public, would feature talks on the conference theme "Beyond the Limits" by University of Hong Kong chair professor in ecology and biodiversity David Dudgeon, Massey University Centre for Freshwater Ecosystem Management and Modelling director Mike Joy and Land and Water Forum chairman Alastair Bisley.