Monitoring of Corals and Other Benthos

 

MScience pioneered and published the techniques for monitoring nearshore Pilbara corals in Western Australia. Direct adaptations of these methods are now applied in all major dredging projects in the North-West of WA. We are continually refining these methods and their interpretation based on over 350 survey trips completed to multiple sites and have improved the ability of these techniques to factor out ‘technique noise’. We now run standard operating procedures for both diver-based and diver-less monitoring of corals, sponges, filter feeders, sea grass and macroalgae.

Every monitoring design is different, being built around the specific needs of established for the program.  We have experience with programs which cover large areas at low levels of precision to programs smaller areas with the capacity to detect small changes. While monitoring programs can be designed to detect very small effect sizes, we caution against programs which push detection limits lower than the capacity to explain that change.

As well as offering full monitoring services, we also provide a design and analysis capacity for projects where there is an existing field team in place from another agency. Our contract analysis services are described here…

Projects

  • Pilbara Corals: we have conducted coral monitoring projects in Mermaid Sound and at Cape Lambert in every year since 2003: the most recent project included 30 months of fortnightly monitoring for a set of over 1500 corals across 24 sites;
  • Ningaloo corals: we designed, analysed and reported a monitoring program amongst the branching staghorn corals surrounding a shoreline construction;
  • Kimberley Islands: In this area safety concerns mitigate against diving and we have established diverless monitoring for corals and other benthos using a combination of images captured by RoV, drop cameras and reef walking at low tide.

Technical Information

Intensive Programs:
Detection of effects below a 10% change – often at the level of named species.

Mostly used for: Monitoring of impacts from point sources on small parts of the ecosystem.

Examples:

  • Localised coral health monitoring for reactive management
  • Coral community structure and diversity effects
  • Environmental impact detection

Techniques: Marked individuals, replicated quadrats or transects, analysis of videos or stills

Rapid Assessment – Extensive Areas:
Detection of effect sizes of over 25% at scales of entire reef or island group – usually at a community level.

Mostly used for:

  • Evaluation of the existing environment: Environmental Impact Assessment, Biodiversity assessment, Marine Protected Area planning.
  • Looking for regional or reef-wide changes: assessment of diffuse effects like changes to underlying ecosystem processes.

Techniques:
Principally those targeting moderate precision information over large areas: benthic lifeforms

Quality

Monitoring programs repeat the same sampling methods over time. It is essential that both the field and analysis components of these programs are subject to strict quality assurance to ensure that the results of different surveys are compatible. This is critical for high precision programs. We use standard operating procedures to deliver repeatable results. Our calibration and checking procedures for the analysis component of this work have been refined from experiences in scoring several hundred thousand images (read more…).

  • Pilbara Corals: we have conducted coral monitoring projects in Mermaid Sound and at Cape Lambert in every year since 2003: the most recent project included 30 months of fortnightly monitoring for a set of over 1500 corals across 24 sites;
  • Ningaloo corals: we designed, analysed and reported a monitoring program amongst the branching staghorn corals surrounding a shoreline construction;
  • Kimberley Islands: In this area safety concerns mitigate against diving and we have established diverless  monitoring for corals and other benthos using a combination of images captured by RoV, drop cameras and reef walking at low tide.