Tipping Points in Coastal Ecosystems

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Candida Savage
Simon F Thrush
Conrad A Pilditch
Becky Cameron

Abstract

Change can happen fast in our coastal ecosystems and we often do not know what has been lost until it’s too late. Once ecological ‘tipping points’ are passed, it is difficult to reverse the state of the ecosystem.1 Often these changes creep up on us because they are caused by the cumulative impact of multiple stressors. These changes in ecosystems mean we can lose important ecosystem functions that underpin many of the things we value about out coastal ecosystems. One of the key challenges of ecosystem-based management (EBM) is therefore to identify what combination of stressors are likely to cause threshold changes and what parts of the ecosystem are most likely to be affected. A multi-institutional team of scientists from across New Zealand is conducting the science to assess the risk of passing these ‘tipping points’ in estuaries before they happen.

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Author Biographies

Candida Savage, Department of Marine Science, University of Otago, Dunedin, New Zealand. Department of Biological Sciences and Marine Research Institute, University of Cape Town, Cape Town, South Africa.

Candida Savage is a marine ecologist with the Department of Marine Science, University of Otago, Dunedin, New Zealand. She is also affiliated with the Department of Biological Sciences and Marine Research Institute, University of Cape Town, Cape Town, South Africa.

Simon F Thrush, Marine Science, University of Auckland, Auckland, New Zealand.

Simon F Thrush is head of the Institute of Marine Science, University of Auckland, Auckland, New Zealand.

Conrad A Pilditch, University of Waikato, Hamilton, New Zealand.

Conrad A Pilditch is professor (Biological Sciences) at the School of Science, University of Waikato, Hamilton, New Zealand.

Becky Cameron, Dunedin School of Art, Dunedin, New Zealand.

Becky Cameron is an artist who explores ideas of landscape, memory and belonging. She is an MFA student at the Dunedin School of Art, Otago Polytechnic. (See  www.beckycameronart.co.nz.)