Blog icon

The challenge

Measuring connectivity in the ocean

Managing multiple uses of a marine environment requires detailed knowledge of the ecosystem and its interactions.

CSIRO scientist Olly Berry with Trevor Sampi, a Bardi Jawi Ranger in the Kimberley ©  Edith Cowan University, Kathryn McMahon

Information about how far animals and plants travel in their lifetime can help inform decisions like where to put marine reserves and fishing zones. Information about how strongly different places are connected with each other can also tell environmental managers about an ecosystem's vulnerability to far-off disturbances.

Measurement of lifetime movement in wild organisms is extremely difficult, especially in the ocean, and has not been attempted for Kimberley wildlife.

Our response

Using DNA to track movements

When organisms move from one place to another they carry a record of their origins in their unique DNA fingerprints.

We partnered with other research institutions, traditional owners, and indigenous rangers to take advantage of this, to gain insights into the distances travelled by marine animals and plants in the Kimberley.

We used new genomic techniques ('SNP genotyping') to record detailed DNA fingerprints from a selection of Kimberley marine animals and plants. From these we estimated how far those organisms typically moved.

Together we collected 5009 DNA samples from seven plant and animals species from 157 sites across the Kimberley as well as from neighbouring regions as far away as Shark Bay and the Northern Territory.

The results

Improved understanding of ecological connectivity

We found that each species exhibited a unique movement pattern, most likely because each has different capacity to swim or float during their important larval or seed dispersal phase. However, some general movement patterns also emerged.

Habitat-forming organisms, like corals and seagrass, tended to travel tens of kilometres or less in our study region. In contrast, the two fish species, and the mollusc we investigated travelled much further - up to hundreds of kilometres. However, the regional differences in the strength and complexity of ocean currents can complicate the general trends of these species.

In some places barriers to movement were evident, whereas other places seemed to facilitate movement. We anticipate that these first insights into the scale of movements in marine organisms from the Kimberley will provide a useful foundation for future environmental planning and assessment in this region. This information can support how to determine the ideal size and placement of marine protected areas and the identification of fishery stocks.

Researchers at Irvine Island part of the Buccaneer Archipelago in the Kimberley ©  Kathryn McMahon, Edith Cowan University

Do business with us to help your organisation thrive

We partner with small and large companies, government and industry in Australia and around the world.

Contact us now to start doing business

Contact us

Find out how we can help you and your business. Get in touch using the form below and our experts will get in contact soon!

CSIRO will handle your personal information in accordance with the Privacy Act 1988 (Cth) and our Privacy Policy.

First name must be filled in

Surname must be filled in

I am representing *

Please choose an option

Please provide a subject for the enquriy

0 / 100

We'll need to know what you want to contact us about so we can give you an answer

0 / 1900

You shouldn't be able to see this field. Please try again and leave the field blank.