Friday, 22 September 2017

Jelly Farm Incubation Experiments

Jellyfish (Periphylla periphylla) weighed to be added to benthic cores

Cores transported to microprofiling climate controlled room 

Microprofiling is conducted right before core processing begins

Elisabeth ready for the next core!  

Hege and Elisabeth core slicing

Anouk removes samples for microbiology analysis

The Jelly Farm team enjoying the beautiful views from the Akvaplan niva Barents Sea Lab, Kvaløya. 

Tuesday, 19 September 2017

JellyFarm Field Work Kaldfjorden, Troms


Monday 4th to Thursday 7th of September the JellyFarm team were out in Kaldfjorden to collect box core sediment samples for benthic core incubation experiments. 



 The boat on its way to location.

 Hector and Carl working hard to open the box core.

Experiment chambers were carefully pushed into the sediment in box core and sent over to the lab for further incubation experiments.

Silvia and Anouk slicing sediment cores for further chemical, foraminifera, 13C and nematode analysis.


Despite some difficulties with coarse and rocky seabed several Gemini cores were also collected in Kaldfjorden.



Kaldfjorden Sediment Trap Deployment

Sediment traps were deployed in the Arctic fjord Kaldfjorden, Kvaløya, Tromsø on the 8th September 2017 by Andrew Sweetman (Heriot Watt University), Marta Cecchetto (Heriot Watt University), Hege Vågen (University of Oslo) and Carl Ballantine (Akvaplan Niva).  

Traps will remain in the fjord for 10 months were they will measure the flux of organic material to the seafloor close to a fish farm and in a control site in the center of the fjord.  

Andrew, Carl and Marta heading out to deploy the first sediment trap

Preparing the trap mooring 

Preparing the acoustic releases for the sediment trap mooring deployment

Thursday, 8 June 2017

Looking back at the lab experiment performed at IRIS (Stavanger) in September 2016, looking forward to work with this team on the next experiment in September 2017

WP2: Quantifying interactions between  aquaculture and jelly-falls on organic matter cycling in fjord sediments. 

Sediments collected in Hardanger fjord at two different depths, in the vicinity and at a distance from a fish farm were collected and incubated in the lab at IRIS.

Periphylla periphylla being thawed, weighed and cut before addition to the sediment cores.

Sediment cores incubated in the lab. Andrew Sweetman adding 13C labelled algae before the addition of P. periphylla.

 Andrew Sweetman measuring oxygen profiles in the sediment of experimental cores.


Slicing, measuring, mixing, subsampling and sieving sediments at the end of the experiment.

Team work at its best!

Monday, 29 May 2017

JellyFarm Meeting, Oslo, 22nd to 24th May


The JellyFarm Project team in Oslo for the 2017 JellyFarm Meeting. 

The JellyFarm Project team in Oslo for the 2017 JellyFarm Meeting.

Dr Siliva Hess (University of Oslo) presents results on foraminifera communities in a jellyfish dominated and a fish-dominated fjord in Western Norway
Lars Birkeland Sjetne (University of Olso) presented results from his masters thesis examining organic carbon accumulation from fish farms in Hardangerfjorden, using a micro paleontological and geochemical study.  

Dr Dan Jones (National Oceanography Centre, Southampton) presented results from work package 5 examining depth effects on jellyfall scavenging dynamics. 

Dr Paul Renaud (Akvaplan Niva) coordinates planning for experiments in the Fall to examine the combined effect of organic input from aquaculture and jellyfalls on benthic biogeochemistry in Kaldfjorden, North Norway. 

Tuesday, 28 March 2017

Flume Update 28th March


Mimic jellyfish have been introduced to the experimental flume system.  Along with the oxygen scavenger irrigation system we will now examine the impact of fallen jellyfish carcasses on oxygen flux in the benthic boundary layer.

Microsensor measuring oxygen between mimic jellyfish carcasses

Mimic jellyfish in the flume