student profile: Mr Gus Porter


Map

Thesis work

Thesis title: The Complexity Implications of Habitat Modification on Fish Using Novel Marine 3D Mapping

Supervisors: Ross COLEMAN , William FIGUEIRA , Renata FERRARI LEGORRETA

Thesis abstract:

Anthropogenic modifications to natural environments are widespread and increasing. However, it is unclear how, or if these changes consistently result in changes to local fauna. One important way in which man-made structures alter pre-existing habitats is by changing their complexity. Habitat structural complexity (HSC) is a fundamentally important aspect of habitat, linked to changes in species distribution. But rigorous measurement and categorization of the components of 3D complexity in underwater ecosystems at resolutions and spatial extents expected to influence fish are only recently possible. Thus, the quantification and categorization of elements of complexity in underwater environments is limited. This leaves the response of fishes to the specific elements of HSC relatively unknown. In this thesis I start by examining the impacts of anthropogenic habitat modifications on fish assemblages. Then, using a custom-built 3D mapping platform, I examine the specific elements of these structures which are likely to be driving changes in fish distribution, proposing new ways to express elements of habitat where necessary. Finally, I test the generality of these findings on fish assemblages across a broad range of latitudes and reef types. Knowledge around complexity as A: a driver of species distribution, and B: an inherently flexible feature of engineered structures has potential to deliver great benefits to spatial management, ecoengineering, impact offsetting and ecological modelling among other fields.

Selected publications

Download citations: PDF RTF Endnote

Journals

  • Figueira, W., Ferrari, R., Weatherby, E., Porter, A., Hawes, S., Byrne, M. (2015). Accuracy and Precision of Habitat Structural Complexity Metrics Derived from Underwater Photogrammetry. Remote Sensing, 7(12), 16883-16900. [More Information]
  • Porter, A., Scanes, P. (2015). Scavenging Rate Ecoassay: A Potential Indicator of Estuary Condition. PloS One, 10(5), 1-16. [More Information]

2015

  • Figueira, W., Ferrari, R., Weatherby, E., Porter, A., Hawes, S., Byrne, M. (2015). Accuracy and Precision of Habitat Structural Complexity Metrics Derived from Underwater Photogrammetry. Remote Sensing, 7(12), 16883-16900. [More Information]
  • Porter, A., Scanes, P. (2015). Scavenging Rate Ecoassay: A Potential Indicator of Estuary Condition. PloS One, 10(5), 1-16. [More Information]

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.