Remarks on Comment on: Williams et al. (2009) Australia's deep-water reserve network: implications of false homogeneity for classifying abiotic surrogates of biodiversity, ICES Journal of Marine Science, 66: 214-224 by Peter T. Harris, Andrew D. Heap, Tara J. Anderson, and Brendan Brooke

Commitment by many nations at the 2002 World Summit on Sustainable Development to complete national networks of Marine Protected Areas (MPAs) by 2012 focused attention on MPA design and implementation, especially for the deep waters that make up the majority of many national EZs. Further, there is a focus on conservation in the High Seas through the Convention on Biological Biodiversity and the FAO, e.g. for seamounts and other vulnerable benthic habitats. Any manuscript that raises basic issues on one identified area for conservation is therefore a prospectively useful addition to the international debate. The Comment by Harris et al. (2009) on a paper authored by myself and colleagues (Williams et al., 2009) is a potentially useful contribution. The authors provide data, examples, and insights into aspects of the design and planning process for Australia's SE network of reserves. Here, we address the main question of how geological descriptions can be used or modified to provide the most information on marine biodiversity patterns for use in conservation planning-in the context of the major points raised by Harris et al. (2009).