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David Logan of Parks Australia
Dave Logan works with research partners to help design and deliver projects that provide an information base for better managing Australia's offshore marine parks. Image: Fraser Johnston/CSIRO
Dave Logan photographs whales
Dave enjoys some whale spotting in Huon Marine Park. Image: CSIRO

seamount blog logoDay 20: Dave Logan, Senior Marine Parks Officer – Science, Parks Australia

Brave souls up at 3 am, staring blearily at hours of underwater video footage or perched on the monkey bridge all day scanning the horizon with binoculars glued to their faces. Tireless sorters of sand and species, staring down the barrel of microscopes and reckless parents flinging their ‘babies’ (priceless instruments years in the making) into the depths, not knowing what they will find.

These surveyors of our restless seas include 43 scientists, support staff and students from national and international research institutes and museums, as well as videographers, working alongside the ship’s crew and us: two marine park managers. We are united by the shared goal to better understand and protect our oceans.

A group  biologists sorting samples
A scrum of biologists sorts treasures from the deep. Image: CSIRO

At Parks Australia, we work in close partnership with experts from national and international research agencies to encourage, contribute to, or commission science that addresses park management needs. Having a shared research vision ensures that new work advances science and contributes to our knowledge of marine park values and pressures. Parks Australia uses this information to inform effective management responses.

In my usual day of work as lead of science communication, I see the results of this shared work from within the four walls of my office. It is a rare treat to be onboard Investigator, helping to collect and analyse video footage and raw data directly as it comes in.

Today, I started with a climb to the monkey bridge to check with Eric Woehler and the team whether any more spinner dolphins had been sighted. I quickly became distracted by the mesmerising beauty of the albatross and petrels soaring past as Eric kept up a running commentary on their names and behaviours.

Eric Woehler in the Monkey Bridge.
Seabird and mammal observation team leader Eric Woehler in the monkey bridge. Image: Alice Forrest/CSIRO

At lunch, I asked Dr Simon Grove to pass the salt. The day before I’d passed him my tray of mud and sand, picked clean of all the larger specimens and ready for him to sift further for micro-molluscs – his favourite species (read more here https://www.nespmarine.edu.au/he-trawls-seashells-seafloor). It’s all about collaboration onboard this ship.

In the afternoon, I shared a special moment with Kylie Maguire and Candice Untiedt, my fellow image processors, as a majestic ghost shark cruised into view. The footage was captured on a previous deep-tow camera run. A few minutes later, Alan Williams, our voyage leader and chief scientist, excitedly announced that the current deep-tow camera footage – taken from within our very own Huon Marine Park – was about to be live-streamed to the world! This is a first for the ship and an exciting development.

“So where are we exactly?” I ask – and in a few clicks, Nick Johannsohn and Frances Cooke, aka the ‘data gurus’, bring our marine park boundaries up on the screen. A ship icon hovers over “Punch’s Hill”, one of the 120 (and counting) seamounts within Huon Marine Park. Previously targeted by orange roughy fishermen, it is just one of the sites we’re assessing for coral recovery.

David Logan with various people on the ship
From left: Dave with videographer Fraser Johnston, data managers Frances Cooke and Nick Johannsohn, and biologist Candice Untiedt. Images: CSIRO

As a marine park manager, I am excited to be part of such a professional and monumental effort and humbled and inspired by the sheer brain-power and expertise behind the voyage. Efforts like this help us to deliver our science program, increase our understanding of marine park values and raise awareness of the pressures they face. I will return to the office with a better understanding of these special places and the dedication and trust it takes to deliver great science – not to mention a thirst to get back out here as soon as I can!

Nic Bax and Dave Logan in the sunset
Dave Logan (right) with Marine Biodiversity Hub director and a principal investigator on the voyage, Nic Bax. Image: CSIRO
Urchins on the seafloor
Rocky bottom with many urchins (Dermechinus horridus). Image: CSIRO

Notes on today's activities from Marine Biodiversity Hub Director, Nic Bax . . .

The day began with the 94-metre long Investigator sitting over the Sisters seamount with a camera dangling on a 900 m wire almost directly under the ship, depending on current. We were looking for five granite 30 cm square settlement plates put there in 2010 with the US NOAA Remotely Operated Vehicle (ROV) JASON. With the ship moving a metre at time above the seafloor (not helped by the camera spinning and sometimes swinging on its cable), it took several hours to find the first set of three settlement plates and then get close enough for some good photographs, but then again there was considerable scepticism at the start as to whether we would be able to find any of the settlement plates without an ROV. The photographs are still to be analysed but initial impressions did not suggest any marine growth after 10 years. When we come back to check on these settlement plates in another 10 years, the Australian research community will no doubt have its own deepwater ROV which will make this and other deep sea exercises much easier.

The remainder of the day was spent adding to our growing set of background tows hunting for deepwater coral. Today we were out in deeper water surveying peaks or ridges at depths from 1140 to 1495 m towing to waters as deep as 1900 m. Coral matrix was observed on all peaks, but mostly dead by 1300 m or soon thereafter. Deeper waters had a variety of octocorals, crinoids and sponges, but were most remarkable for the broad coverage of urchins often in the absence of almost all other larger invertebrates. This completes 28 of the 30 planned background tows. The tows had several points of interest, including an unexpected 10 m vertical rock wall on the deepest transect that we were lucky to drag the camera up with minimal damage, and a brittlestar doing what looked like the breaststroke as it tried to swim away from the cameras.

Wind and seas picked up during the day, complicating operations. We remain unable to deploy the Sherman sled but a beam trawl is planned after the 30th background tow has been completed, much to the relief of the biologists on board.

 

Location: 
Voyage date: 
Wednesday, December 12, 2018
Day: 
20

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