Aquifers: the ultimate groundwater-dependent ecosystems

I have learnt a great deal about aquifers and hydrogeology from discussions with Philip Commander and Kevin Morgan. I thank Stefan Eberhard, Ivana Karanovic and Tomislav Karanovic for permission to cite from their unpublished works. Ken Grimes generously provided the karst map. I appreciate the use of photographs by Chris Watts, Stefano Taiti and Joo-Lae Cho. Various parts of the work reported here were conducted under grants from Australian Heritage Council, Australian Research Council, Australian Biological Resources Study and the Butler Trust. The constructive comments of two anonymous referees are appreciated and resulted in improvements to the manuscript.

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