Tag Archives: Greenland

Good-bye Greenland!

The last days before leaving the Arctic Station were busy: last boat trip, last samples, last possibility for filming work with the underwater-camera. Personal projects to finish, lab to clean, things to pack, and on top of all that: a football match against the Qeqertarsuaq “Old Boys”!

Last days in the lab: full house! The underwater film team: Mette and Jenny

Bathing between icebergs – who can resist?

Football match against the Qeqertarsuaq “Old boys”, who turned out to be not that old… and pretty fit!

We left the Arctic station on a beautiful sunny day and headed towards Ilulissat, where we spent two days in wait for our flights back to first Kangerlussuaq and then Copenhagen. And beautiful days that was: Ilulissat is known for its icebergs and some of us took an icefjord tour on a handsome, oldish, boat with red paint and wooden deck. And – to our surprise – it turned to be out the old Porsild – the Arctic Station’s former research vessel!

On the way to the ice fjord in Ilulissat – on board of the boat that turned out to be the Arctic Station’s former research vessel (the “old” Porsild!).

Now we are back to our respective homes – wrapping up coursework and getting on with our lives, PhD projects, master theses, scientific work and teaching. But we all agree: this was a very special course bringing us close to Arctic nature and providing us with outstanding possibilities to collect and study Arctic marine organisms. We could both widen our taxonomic knowledge and – in different degrees – even get data that are of direct use for our ongoing research projects.

At the end of this blog, we want to thank all those who helped us during this trip: Ole Stecher and Akaaraq Mølgaard at the Arctic Station, the crew of RV Porsild: skipper Frederik Grønvold and boatmen Søren and Johannes. Also, we are thankful to Reinhard Møberg Kristensen (Univ. Copenhagen) for suggestions concerning sampling sites and use of equipment!

The Research School in Biosystematics (ForBio) is funded by the Research Council of Norway and by the Norwegian Taxonomy Initiative – thanks for making a course like this possible!

And thanks to all of you who have been following us via this blog!

Written by: Christiane Todt (coordinator ForBio, University Museum of Bergen); Featured image: (Jenny) under the rainbow. Photo: Anne-Helene Tandberg

Team blue mussel on the track of the expanding blue mussel in a changing Arctic climate

The blue mussel (Mytilus edulis) is on the run, a historical run. Blue mussels are currently expanding towards the North with an unprecedented pace, taking over new areas along the way.

Rich and healthy mussel beds in the Arctic

Blue mussel is an ecologically well-studied species that often dominates the coastal zone, where these characteristic bivalves form a specific habitat with a distinct associated fauna. Such habitat formers, which influence ecosystem structure, have a potential for wide impact if they are able to migrate into new areas due to changing climate. With the record increase in ocean temperatures, the blue mussel has already expanded its northern distribution well into the High-Arctic region.

My PhD project at Aarhus University aims to investigate the distribution, abundance and physiological adaptation of the blue mussel along the West Greenland coast. Thus, my participation in the “ForBio marine field course, Greenland” was of central importance for my project. During my “individual project” in the course, more than 4500 blue mussels were collected at several prime locations! All mussels were measured, weighted, and aged by counting growth rings – a work accomplished by the energetic ‘Team Mussel’, mainly consisting of Josefin and me – Jakob. In spirit though, everybody on the course was a part of this amazing team, and I thank them all for helping out by collecting Blue Mussels in Disco Fjord, while I stayed behind at the station for physiological measurements in the quiet laboratory.

Happy collecting of blue mussels at Disko Bay

In the final days we expanded our project, collecting material for comparing population dynamics of mussel beds in the low and high tidal zone. To catch the low tide, Josefin and I went on a rainy, cold and dark morning to collect mussels. Despite the early hour, lack of coffee, and no breakfast, we returned to the lab in the rising sun with a whole bunch of mussels. Mette and Jenny had finally seen the light and joined ‘Team Mussel’ full time to help getting everything done in time.

‘Team mussel’ consisting of Mette, Jenny, Josefin and Jakob hard at work

All blue mussel data collected during this course will be used to increase our understanding of the ecological consequences of the expanding blue mussel in the Arctic. By comparing population dynamics and macrophysiology among populations found at Nuuk, Disko Island, Upernavik and Qaanaaq, our studies will allow us to better understand the direct (and indirect) impacts of the changing Arctic climate. Eventually, we hope to expand our knowledge of how species susceptible to expand their current distribution range will influence current ecosystem structure and function in a warmer future.

By Jakob Thyrring (Aarhus Universitet)

Sculpin fishing in Greenland

As a PhD student from the University of Gothenburg researching gastrointestinal motility and blood flow in fish, you may wonder how did this man arrived in Greenland on a Forbio marine field course!! Well, let me explain……..

Gastrointestinal motility and blood flow in fish can be affected by a range of abiotic (e.g. temperature) and biotic (e.g. diet) factors. As part of my doctoral research I video record the movements of the gut and produce spatio-temporal maps allowing me to qualitatively and quantitatively characterize gut motility patterns in vivo in fish. Using this method I want to investigate the effects of diet and temperature on gut motility patterns in a fish species called shorthorn sculpin (Myoxocephalus scorpius). However, before I can experimentally test the effects of different compositions of fats, proteins and carbohydrates in food on motility patterns I need to know the natural diet of these animals…….and thus, much to my joy and excitement, we arrive at Disko Island, one of the more northern areas in the geographical distribution of shorthorn sculpin!!!

Fishing for sculpin…..arctic style

Due to strict luggage regulations I was unable to bring my ultimate sculpin-catching device (fishing rod) and instead had to arm myself with a 50 DKK handline from the local supermarket, which made things increasingly difficult (that was my excuse anyway!!). After numerous failed attempts at a range of beautiful locations, my total catch included a piece of seaweed, 4GB of wicked photos, no hooks and sinkers left, and my pride was taking a severe dent as people were now sarcastically referring to me as the ‘master fisherman’. Eventually through a combination of the stars aligning and the purchase of a ‘lucky hook’, the fish started biting….hallelujah!!!! After the slightly messy business of extracting the stomach contents from the individual fish back at the lab, it was time to identify what these animals feed upon.

Removing the food contents from the stomach…

Luckily for me there was an abundance of excellent taxonomists on the course to help me identify the semi-digested prey items. Thus without further ado……. they feed upon pretty much everything they could get their ‘hands’ on!!!!! This included gastropods (Littorina saxatilis, Littorina obtusata, Margarites groenlandicus), polychaetes (family Glyceridae), amphipods (fam. Caprellidae and Gammaridae), chitons (fam. Leptochitonidae), molluscs (Mytilus edulis), shrimp (Pandalus borealis) and big blocks of nicely cut up seal blubber (which was the bait of choice!!).

Thus in conclusion……shorthorn sculpin are opportunistic feeders and will utilize a range of different prey items to satisfy their metabolic demands. Now that I have arrived back in Sweden, armed with new skills and knowledge on invertebrates, I would like to do a similar study on the shorthorn sculpin residing on the west coast of Sweden to compare differences in diet of the two different populations, which will make up an integral part of my PhD thesis.

Not a sculpin…but a halibut!!!…..a predator of the sculpin as we found a whole sculpin inside the stomach!!!!

All in all it was an amazing adventure which I will not forget and I strongly advise any students to take part in future courses!!!!!!!

Signing out……..Jeroen Brijs (Gothenburg University)

Our Favourite Things

The participants of “ForBio Marine Course Greenland” represent a highly diverse group. This is our presentations of ourselves through our favourite organisms (“things”):

Near the end of the Greenland Adventure, full of unforgettable experiences and close to collapse of exhaustion after long days of sampling and sorting, our Arctic explorers took a few minutes of their precious time to write about themselves and which organism made them head North, up till latitude 69 degrees.

Andreas Altenburger (University of Copenhagen):

The aim of my project is to investigate the embryonic development of animals in the phylum Kinorhyncha. During the course I use the possibility to collect several kinorhynch species and try to make them reproduce.

Anne Helene Tandberg (Institute of Marine Research, Tromsø):

Amphipods from the genus Metopa are my favourite animals. This is a photo of Metopa alderi, who, just like its “cousin” Metopa groenlandica has been found here; they both live inside mussels. I love the way the tiny details help us determine which species we look at, and that they have found such clever ways of living – nice and cozy inside another animal…

Christiane Todt (University Museum of Bergen):

My special interest are molluscs, and especially the shell-less and worm-shaped aplacophoran groups. The small solenogaster (or neomeniomorph) on this picture has already gained some fame in 2011 by being featured as “Greenland neomeniomorph” in a publication in the journal Nature (480: 364–367) – but it has no valid name yet! We found 10 more specimens – enough to analyze its anatomy and spicule morphology to come up with a proper species description and a scientific name!

Daniela de Abreu (University of Gothenburg):

Yes! Slow moving amphipod. My favorite animal, so far, is Socarnes vahlii, the cutest, most colorful, and slowest amphipod I spotted on the Lithothamnion aggregation samples of Disko Fjord. This guy has the most amazing chromatophore patterns and colors of the crustaceans collected in this trip.

Henning Flørenes (University of Bergen):

Here on Greenland we’ve had a great variety of fauna that are absolutely fascinating. I’m currently working with calcareous sponges that are as amazing as anything you can imagine. My personal favorite is the fabulous Brattegardia nanensi. With its elegant form and lovely network of asconoid tubes, it ranks as the top sponge on my favorite list. It’s known to be around the Disko Island area so I’ve had the great opportunity to get a specimen and take a closer look at it.

Inga Meyer-Wachsmuth (Stockholm University):

My favorite animal didn’t show up, but there were a few close relatives that were unexpectedly colorful. This is a possibly undescribed species of Acoela of less than a mm length, with a beautiful red coloring. It was found with the Lithothamnion aggregations.

Jakob Thyrring (Aarhus University):

I am working with blue mussels as they are ecological important species. I will investigate how this species that are susceptible to expand their current distribution range will influence the Arctic ecosystem structure and function.

Jenny Egardt (Gothenburg University):

I am a PhD student working with biodiversity and habitat change as a measurement of human impact in shallow marine coastal areas. In Disko, I am interested in learning more about arctic species and their abundance, and compare video footage taken during this course with footage from two years ago to see if the habitats are still the same.

Jeroen Brijs (Gothenburg University):

I’m doing a PhD on gastrointestinal motility and blood flow in fish, specifically shorthorn sculpin (Myoxocephalus scorpius). I have captured a few here in Greenland to examine their stomach contents to determine what prey species they feed on so that I have a better understanding of their feeding ecology as this will assist me in understanding the digestive processes which occur within this fish species.

Josefin Sefbom (Gothenburg University):

I am investigating population genetic patterns of the diatom Skeletonema marinoi – a common and important bloom-forming primary producer found in many coastal waters.

Mari Heggernes Eilertsen (University of Bergen):

For my PhD I will be working on several different animals, but at the moment my favorite animal is a small calcareous sponge called Sycon abyssale, which is found in the deep North Atlantic and Norwegian Sea. Interestingly it is also found in shallow waters (<100 m) in Norwegian fjords, and I will use genetic analyses to establish if these populations are the same species and investigate the geneflow between populations, especially across the Greenland-Iceland-Faroes ridge, which is believed to be a major barrier to dispersal for deep-sea organisms.

Mette Møller Nielsen (Aarhus University):

I am a PhD student from Aarhus University, Denmark working with kelps. Kelps are widely distributed and highly productive and they are important organisms in coastal zones where they form key habitats. They act as substrate for sessile organisms as well as shelter and nursery area for fauna in general, thereby stimulating biodiversity.

Arom Mucharin (Aarhus University):

This small (ca. 3mm long) juvenile of Cucumaria frondosa (Gunners, 1767) we found in the Lithothamnion samples is really cool! I have been working with sea cucumbers in Thailand and in Denmark for some time now, but usually the specimens I deal with are much larger!!!

Peter Funch (Aarhus University):

The penis worm Priapulus caudatus from the mud outside the habour of Qeqertarsuaq (Godhavn), Greenland, was one of the best finds of this course for me. Together with my students in Aarhus I investigate symbiotic bacteria that live in the gut of these creatures.

Peter Kohnert (Ludwig Maximilian University, Munich):

I do my PhD on the evolution and phylogeny of pteropods, my main interest is the sampling of specimens of Limacina helicina and its predator Clione limacina (see picture), generally known as “sea angel”. Besides that I enjoy exploring the diversity of arctic gastropods in general.

Maria Perpétua Scarlet (Gothenburg University):

The small (10-13 length), fragile bivalve shells of the species Ennucula tenuis, are beautiful, olive-yellowish or brown in color outside and nacreous inside; tho specimen was dredged at 50 m depth on mud of Eqalunguit, Disko Fjord.

Sandra Lage (Stockholm University):

Ceratium fusus found in the surroundings of Disko Island, is my favorite organism of the day. You can find them everywhere, from Tropics to the Arctic, the marine and fresh waters teem with life; a so tiny…microscopic life that ultimately all trophic chains depends on. While most of these species of phytoplankton and cyanobacteria are harmless, there are a few that create potent toxins given the right conditions, and this are the ones that I have been always fascinated about.

Edited by: Sandra Lage (Stockholm University) and Christiane Todt (University Museum of Bergen)

Calcareous sponges of Disko Bay

Fifteen species of calcareous sponges (phylym Porifera, class Calcarea) are known from the Disko Bay area, and nine of these have their type locality here, which means that this was the area they were fist described from. During this fieldtrip we wanted to collect calcareous sponges from Disko to get material that can be used for genetic studies to investigate the relationships between the populations in Disko Bay and populations of what is believed to be the same species in other localities.

Spicules from Brattegardia nanseni.

Largest calcareous sponge found during this fieldtrip.

Identifying calcareous sponges is not a straightforward business; first of all they are very small (most < 1 cm), and secondly they do not have any obvious external characters like bright colours, legs or even a head. In stead they have spicules. Spicules are small needle-like structures that function as the skeleton of the sponges, and in calcareous sponges they are made out of calcium carbonate. The shape of the spicules is an important character to identify sponges, in addition to the morphology of the sponge body and the arrangement of different types of cells. To look at the spicules of the sponges we need to clean the spicules from tissue and mount them on microscope slides. We cut out a piece of the sponge and add household bleach, which is left to work for 30 minutes, followed by three rounds of cleaning with distilled water, each taking 30 minutes. To make a permanent slide that we can look at again and again we use an imbedding medium that takes about 24 hours to dry sufficiently, so the time between we find a sponge specimen until we can identify it can be quite long.

Collection of sponges fixated on ethanol.

We have had quite good sampling success so far, with over 50 specimens of calcareous sponges, and a few sponges of other classes. Most of the specimens were found sitting inside globular aggregations of Lithothamnion, a red algae (described in an earlier blogpost). Getting the sponges out from the Lithothamnion was tricky, both because they are very small and hard to spot, and because they were sitting quite far inside the globules, probably to get shelter. We also got many specimens from a triangular dredge sample that was sieved through a 1mm sieve. This is also where we found our largest specimen so far on this course! A beautiful Leucandra penicillata with a length of a whopping 5 cm! The calcareous sponges we have identified belong to at least eight different species, but the material has to be examined by experts to be certain of the identification.

Not all the samples we collect are equally interesting, but ones in a blue moon something special comes along. Yesterday, while sorting through the material from the dredge, we realized that we had just found the remnants of our good friend Spongebob Squarepants! It was a sad day indeed as we sieved out our global mascot from the murky waters. A memorial was thrown in his honour with the Greenlandic flag on half a pole. But life goes on and so does the search for new exciting sponges in different parts of the world!

Oh no – Sponge Bob is dead!!

By Henning and Mari (University of Bergen).

Featured image: Variety of calcareous sponges from Disko

First experiences with Arctic sea cucumbers.

During the first day of our stay (13 Sep. 2013) at Qeqertarsuaq bay, Disko Island, we sampled using the triangular dredge at depth 37 meters. We got many specimens of animals and plants. Anne Helene picked a sea cucumber from the sample container and called me to see it. It was stained with mud, but after quick cleaning it looks better.

Peter, Anne Helene, and skipper Fari were busy with triangular dredge sampling

Pentamera calciger (Stimpson, 1851)

In the evening, I checked its outer characters and ossicles (small spicules in the skin) and identified it as a Pentamera calciger (Stimpson, 1851). It lives buried in the mud while its dendritic (branched) tentacles reach out above the mud surface for feeding.

Above: Ossicles from Pentamera calciger skin: tables, elongated plates and end plate

I got the second species of sea cucumber from the Amphipod Team as well (Anne Helene, Daniela and Henning). They found four specimens while looking for amphipods in algae. I was excited about those because they were Apodida (sea cucumbers without tube feet), the same group as I am working with in my PhD thesis. After examination, I found out that they are Chiridota laevis (Fabricius, 1780).

Chiridota laevis (Fabricius, 1780)

Chiridota laevis ossicles: wheel development (above) and irregular wheels (below)

One week later, Christiane and Inga gave me 6 sea cucumber juveniles from the large Lithothamnion aggregations, Kangerdluk, Disko Fjord. Of course! I never seen them before, they are so small (2-4 mm long) and have a nice orange colour. Under the microscope, they are a bit transparent and the ossicles are easy to see. I find that so amazing. I also asked Andreas to take these beautiful photos for our blog.

Both belong to the dendrochirotid order. The species are Cucumaria frondosa (Gunnerus, 1767) and Psolus sp., respectively. Cucumaria can become close to 30 cm long when they grow up!

My lab work corner – sea view with icebergs (photo by Andreas)

Although I found only four species of sea cucumbers, for me, a student coming from a tropical country, this is a great experience and a good start to learn more about Arctic sea cucumbers. It is so cool!

Written by Arom Mucharin (Thai Ph.D. student from Aarhus University, Denmark)

Rodoliths !!!

During our field-trip to Disko-fjord we took samples from an area densely covered with so-called Lithothamnion-aggregations (rodoliths) – a very special habitat (see also Mette and Jenny’s entry on our “Trip to Disko Fjord”) !

Mette taking a sample at the site. Christiane holding a gigantic Lithothamnion rodolith.

Screenshot of a movie taken by Anne Helene at the site

Lithothamnion species are calcareous red algae, that is, they have hard thalli due to calcium carbonate deposits. Most commonly they form a coating over hard substrates, but in Disko Fjord there is a species (Lithothamnion glaciale) that rather looks like a coral and forms so-called rodoliths. These aggregations grow to about fist sized “balls” that under stormy conditions may tumble on the muddy seafloor, much like tumble weed through old western movies, but usually they just lie there peacefully.

Broken up Lithothamnion aggregate with sipunculid worms (the muddy, sticky-out thing on the right is actually an animal!)

As they are the only hard substrate in an otherwise very “soft” environment, they act as oases attracting a wide range of animals otherwise not found on mud. Also, the rodoliths appear to act as a nursery habitat for diverse species (we found baby chitons, baby sea cucumbers and various baby snails).

Teenage chiton (Tonicella rubra)

Some of the animals are big enough to be seen by naked eye and are sitting on the algae. Other organisms are very small and need to be persuaded to let go and come out of their holes. So after picking all animals that we could see by eye, like some tiny sponges of not more than a centimetre, beautiful pink chitons, brittlestars, small sea urchins and sipunculid worms, we smashed all the algae and submerged them in magnesium chloride.

That is a rather sneaky method to get to the tiny hiding creatures that still hold on and/or escaped our attention. Magnesium chloride acts as an anaesthetic and the animals let go of the substrate and can be washed off into a fine-meshed sieve and then be transferred into our petri dishes for further examination. And this method revealed an even more stunning variety of animal life under 1 cm length: several possibly undescribed species of Acoela, microscopic worms that by some are thought to resemble the first bilaterian animals, but also different snails, flatworms, mites, polychaetes and crustaceans.

Meiofauna extracted from the rodoliths (with several acoel flatworms)

Some of the “Greenland neomeniomorphs”

Also, Christiane found several individuals of a certain species of solenogasters (worm-shaped, shell-less, spiny mollusks) hitherto only known as the “Greenland neomeniomorph”. She desperately had been looking for some additional specimens to get an official taxonomic description completed. – Juhuuu!

Rodoliths! – These beautiful algae turned out to hold an astounding variety of animal groups.

Written by Inga (Stockholm University) and Christiane (University of Bergen)

Plankton People

Finally!!!!!! Today was the day for the plankton folk to rule the Porsild, and boy did we rule! We set off at the crack of dawn (or around 8 am…). To our surprise breakfast was waiting for us, despite the early hour. Thanks to the troopers Anne Helene and Perpetua, who got up at 6.15 to prepare that for us!

The group that headed out was Peter K., Sandra and Josefin, who were all on the hunt for plankton. But we also brought our super translator, Jakob, and Jeroen had the duty of assisting and entertaining.

At first the weather was looking promising. The sun was shining and the water was calm, however as soon as we came out onto open water the waves got significantly bigger. The mighty captain of Porsild decided that conditions were too rough for our planned destination, and so instead he took us to an alternative spot. As Peter had some specific criteria for catching his beloved pteropods (planktonic snails), we needed to find a spot were the depth was a minimum of approximately 200 m. As some pteropods migrate down during daytime to avoid predators, the plankton net needed to go down to ca. 150 m.

As Josefin had only recently learnt that the water hose on board collected its water from 3 m depth, her surface phytoplankton samples were extremely easy to obtain!!! She could simply put her Barbie-sized phytoplankton net under the hose and filter out the plankton.

Sandra and Josefin – happy plankton samplers

At the spot, the big zooplankton net was thrown over board and hauled at 150 m for a good while. Peter was full of joy and high hopes for his samples. The excitement was building up as the net surfaced, but…as it was pulled back on board the boat, Peter noticed that the collecting bottle attached to the bottom of the net had been smashed into pieces!!! Despite Peter hiding behind his sunglasses we could tell that the tears were building up. Jeroen stepped in and calmed him down by whispering comforting words in his ear. Søren, our boatman, then suddenly appeared from the cabin holding a big role of duct tape. We could all feel the hope beginning to return. Peter wiped away his tears and stepped into the cabin. He duct taped the life out of the small bottle, and back into the water it went. As always, third time is a charm, and Peter could finally retrieve his pteropods. Søren received a massive big hug from the overjoyed Peter. In the catch there were the expected two species, namely Limacina helicina and juveniles of its specific predator Clione limacina. Generally pteropods have attracted special interest being among the species that are considered to suffer most from increasing ocean acidification, but still little is known about their phylogeny and evolution…

Sandra and Jeroen enjoying the sun between samples

Next up was Sandra. Sandra wanted to retrieve zooplankton samples from 25 m depth. Although our quick-mouthed and cheeky friend had been surprisingly quiet during the rough ride, it was now her time to shine. She quickly returned the zooplankton net into the water and gave strict instructions on the depth and length of the tow. As Josefin had buttered up the captain with pieces of chocolate, he was finally willing to follow the strict orders, marvellously translated by Jakob. In the end Sandra got the samples she needed without having any further problems.

Last but not least, Josefin needed to collect phytoplankton samples from 40 m depth. This was carried out with the help of diligent Søren and… a water sampler! The 60 litres of water that were collected, were then concentrated to a mere volume of 15 ml!!

On our way back to the harbour winds and waves had picked up. Since Jakob had almost accidently dropped Peter’s samples back into the ocean, Peter was now guarding his buckets of planktonic treasures. He set up camp with a minimum of 1 m radius, which no man was allowed to pass. Unfortunately he had forgotten to bring lids, so for the last minutes of the cruise he had to hold the buckets in his hands to prevent the content from being spilled over the deck.

Peter and the Plankton

After 3 hours we arrived back at the harbor without any further incidents. All in all, the trip was extremely successful.

Written by: Josefin (Gothenburg University) and Peter (Bavarian State Collection of Zoology)

Featured image: Clione limacina – commonly known as ”Sea Angel” (photo: Peter Kohnert)

Trip to Disko Fjord

Waking up bright and early Monday morning we all eagerly awaited a call from the captain of Porsild on whether we would be able to go on our sampling trip to Disko Fjord or once again have to change our plans due to bad weather. The call came and like a child on Christmas morning our eyes glistened with hope.

Yes! We are going!

The weather was even good enough to take the small speedboat with us, so three brave guys dressed up in teletubby-like survival suits, which are one size that really fits no one.

Jeroen and Peter rock in the survival suits

We were told this little boat would be slightly faster than Porsild, and as we steamed out of the harbor doing approximately 5 knots it raced passed us at the speed of light with the mighty Johannes at the helm.

On the Porsild we were all taken by the beautiful scenery, large icebergs and steep cliffs that plunged into the sea made almost every moment a Kodak one. The sea was calm and not a single whale spotted so the trip was somehow uneventful in this matter.

For our speedboat crew the story however was quite the opposite. Having arrived hours ahead of Porsild, our brave boys decided to do some fishing. This resulted in them catching not one, not two, but six large cods which we later prepared for dinner with the only spices at our disposal, salt and beer.

Very happy boat crew

They also had a taste of the Inuit everyday life when a curious seal approached the boat. Quicker than any gunman in the wildest of the west, Johannes reached for his rifle and that seal is now swimming happily in the eternal seas.

At the arrival of Porsild we all met up for some sampling of blue mussels. Oddly enough, the only one of us who actually works with this organism was still at the Arctic Station having us do his dirty-work for him. What a clever Dane he is, that Jakob.

Sorting mussels

So, after replicating sampling grids and sorting and cleaning mussels until our fingers were the same temperature as the surrounding water we headed to a nearby village, population of 50.

Half of us were to spend the night on Porsild and the other half were camping on land and therefore had packed both warm sleeping bags and thermal mattresses. The “campsite” turned out to be a house where government officials stay while visiting the area so needless to say, our campers was not particularly uncomfortable in their palace with a panorama view of the fjord and surrounding mountains.

After a good night on board Porsild being gently rocked to sleep by the sea we woke up to the smell of fresh coffee ready for an exciting new day in Disko Fjord.

First on the agenda(after collecting our campers) was to go look for a radioactive hotspring, not to worry though, it was not radioactive enough to make us glow in the dark. Even for the crazy German Andreas who walked barefoot.

This spring is homeothermic and thus never freezes. This creates a very unique environment that allows species like orchid and Angelica to grow in an otherwise harsh environment. Rumor has it that the vikings used to smoke Angelica and further the Inuits have a tradition of using it for producing an alcoholic beverage.

Withered orchid – apparently they do not bloom in September…

So, armed with GPS-coordinates and survival suites very suitable for boat rides in the arctic (but definitely not for long walks) we were put to shore within a short walking distance from this elusive spring. Or so we thought.

Apparently our captain didn’t care much for those coordinates. This could either have been a miscommunication (none of us speak Inuit very well) or he just felt we needed some exercise (he was probably right considering the high amount of potatoes and gravy in our diet up here…), because we ended up walking up and down moss-covered hills for about one kilometer before reaching said spring.

Finally there, everybody was on their hands and knees taking pictures from all kind of weird angles of Angelica, gypsum fluorite precipitation on rocks and withered orchids. Surprisingly enough, the orchids were no longer flowering at this time a year – but what do a bunch of marine biologists know about that stuff anyway.

Photographing Angelica can be tricky Gypsum fluorite precipitation

Back on the boat we had a very quick cup of coffee and then off we went for the next agenda of the day, Lithothamnion sampling!

Lithothamnion are coralline red algae which creates either crusts on rocks or globular aggregations on the seafloor. These globular Lithothamnion were of particular interest due to their importance in creating unique habitats for meiofauna…

So tune in on our blog tomorrow for more exiting scientific facts about this topic.

Written by: Mette (Aarhus University) & Jenny (Gothenburg University)

Disko amphipod experiment

Saturday 14^th of September, a day with a handful of events throughout history: Stephen V ends his reign as Catholic pope (891), The Netherlands and England sign a peace treaty (1662) and Walt Disney gets the Medal of Freedom at the White House (1964) to mention a few. Moving towards present day and we find scientist and researcher Anne Helene setting up her traps on an experiment to catch amphipods at the local harbor in Qeqertarsuaq, Greenland.

The amphipod trap team: Daniela, Henning and Anne Helene

With a warming sun and clear sky in the back she is assisted by enthusiastic students Henning and Daniela heading towards the chosen localities for the traps. To understand this experiment a little better we need to go back in time to the happy 90’s.

In 1990 Yves Scailteur and Claude De Broyer examined feeding in amphipods at the Arctic Station, Greenland from July 25^th to August 18^th. In one of the experiments traps were laid between 80 and 180m depth to catch the temperature and light sensitive amphipod Anonyx makarovi, in another experiment they examined the scavenging amphipods that were present at shallower depths.

A scavenging amphipod (Onesimus sp.) – what we hoped to find. Drawing by G.O.Sars, 1891

23 years later scientist Anne Helene decided to set up a similar experiment to study scavenging amphipods. She made three homemade amphipod traps consisting of plumber tubes, plankton net, horse clamps and funnels and the result looked like this.

Traps “armed” with fresh seal blubber.

Preparing the blubber – the smell was quite intense… 😉

So on a sunny Saturday afternoon Anne Helene, Daniela and Henning set out to place these infamous traps to gather some amphipods for further examination. For bait the traps were fitted with fresh seal blubber straight from the fish market and a nice good chunk was put in to keep the amphipods well fed. There were chosen two localities for the experiment, the royal dock (actually just a floating dock with a bridge) by the museum of Qeqertarsuaq and at the harbor next to the research vessels docking point. The traps were hung with a solid rope roughly 2m down into the water with different colors to differentiate the two locations when collected; blue rope would indicate the dock and white would be the harbor.

Site 1: “The Royal Dock” Site2: The harbor.

After 24 hours of exposure in the different sites, on a windy Sunday afternoon the three characters went to collect the traps, and to their relief they were still there! The traps were collected and on their way back to the Arctic Station they spotted a sunken ship, sledge dogs and friendly people greeting us as we passed by.

Retrieving the traps

So what was the outcome? Not a single amphipod…. Why? They really don’t know. It could be a number of factors from leaving them for a too short amount of time to feeding the scavenging munchkins something other than delicious seal fat. But wait! The traps weren’t completely empty! There were a couple of polychaetes (Phyllodoce maculata) gathered around in one of them that seemed to be fascinated by the blubber and the blood. And even if the plan wasn’t to catch polychaetes, a failed attempt doesn’t have to mean that the findings don’t matter. In science we don’t discriminate!

The sampling result: a bucket of worms Empty seal blubber pieces and clean net

Our sampled species: Phyllodoce maculata (Linnaeus, 1767) with seal blood in the gut.

Written by: Henning (University of Bergen) and the girls (Daniela (Gothenburg University) and Anne Helene (Institute of Marine Research))

The Invertebrate Collections

The University Museum of Bergen