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Microbial biodiversity

3 Posts tagged with the glacier tag
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Our last field trip was to Harpon Bay. Unfortunately, we managed to pick one of the most rainy days of our whole trip. Nevertheless, we still got some good samples, and even more enjoyed dinner and a warm cup of tea in the evening. The main glacier in Harpon Bay is the Lyell Glacier which is highly covered with debris. It is also a very active glacier with a lot of calving.

 

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Lyell Glacier with meltwater stream and seal wallows


IMG_9199.jpgLyell glacier with ice debris


But, now it is time to say good-bye to South Georgia. After 1-month of extensive sampling, we now have an interesting set of samples to take back to the UK for further analysis. The last two days, we spend cleaning, packing, and getting our samples ready for shipping.

 

We left South Georgia on the James Clark Ross (JCR), one of the British Antarctic Survey's research vessels. The JCR arrived on a windy morning and we were all transferred by jet boat onto it. The JCR left Cumberland Bay as soon as we were onboard, and we waved King Edward Point goody-bye.

 

SG8.jpgLast views of Grytviken (thanks to Barbara for the images)


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King Edward Point Research station


Before the JCR headed towards the Falklands Islands, there was another stop at Bird Island, a small island at the northern tip of South Georgia. A few people joined us from there, and some re-supplies were loaded off. It was a cloudy morning, but Bird Island still looked beautiful. A multitude of birds such as petrels and albatrosses could be seen.

 

After a few hours at Bird Island, we headed for the open sea. While we were on the JCR , we had a chance to visit the labs and find out more about the science happening on the research cruise. We were lucky the sea was pretty calm throughout our journey, and after 3 days we arrived in Stanley, Falksland Islands. From here, we jumped on a plane to get back to London.

 

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Bird Island


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Several albatrosses


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On the JCR in open sea


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JCR in Stanley Harbour, Falkland Islands

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We had the opportunity to carry out sampling on several peninsulas such as Barff, Greene and Thather Peninsula. We were keen to visit as many sites possible for a good geographic coverage, to gain a better understanding of the spatial distribution of microbial taxa, richness and community composition.

 

We are also interested in glacial meltwater run-off on microbial biodiversity, therefore we collected samples near several of South Georgia's glaciers including Harker, Nordenskjöldand Heany Glaciers.


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Nordenskjöld Glacier, Barff Peninsula


IMG_8491.jpgHeany Glacier, Barff Peninsula

 

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Penguins wandering onto Heany Glacier


 

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A Meltwater stream at Heany Glacier

 

We were able tohike to many ofour sampling sites on Thather Peninsula, but in order to get toGreene and Barff Peninsula, we had to be taken by boat. The boat trip were always great as we would get quite close to some of the big icebergs and constaintly cracking and carving glaciers.

IMG_8951.jpgIcebergs near Nordenskjöld Glacier


 

DSCF1286.jpgBoat officers getting a RIB boat ready

 

DSCF1281.jpgWe are getting ready for the boat trip

 

DSCF1300.jpgInside the Harbour Launch


IMG_8265.jpgBoat journey to Barff Peninsula

 

During our multi-day field trips, we would stay at the lovely well-equipped field huts that are maintained all over South Georgia.

IMG_8581.jpgThe hut at St Andrew's Bay

 

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IMG_9034.jpgThe hut at Greene Peninsula

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A field team with members from the Natural History Museum and University of Sheffield will spend five weeks in January to February 2013 at King Edward Point research station in Cumberland Bay on South Georgia, Southern Atlantic Ocean. The project is funded through a Research Grant by the Government of South Georgia and the South Sandwich Islands.

 

The aims of the field trip are to collect samples from soils and streams around Cumberland Bay such as Greene and Barff Peninsula to perform a comprehensive characterization of the bacterial and microbial eukaryotic diversity using next generation sequencing. The sample collection will enable to map bacteria and microbial eukaryotic community richness, composition and geographic distribution. Nutrients analysis for especially nitrogen and iron will also be performed to evaluate the relationship between microbial diversity and nutrients present in soils and streams.

 

This is important because bacteria and microbial eukaryotes are a major component of soils, and are essential for maintaining terrestrial ecosystems. Microbes are also important for processing of organic biomass and minerals in the soils, and nutrients generated in the soils can be transported into coastal waters through terrestrial runoff, and could subsequently potentially provide a source of nutrients for phytoplankton and fish in the coastal waters of South Georgia.

 

South Georgia is an island in the southern Atlantic Ocean and located south of the Antarctic Convergence, which is a climatic boundary between air and water masses of the Antarctic and subantarctic regions. South Georgia is around 170 long and between 2 to 40 km wid.

 


map1.jpgSouth Georgia in Southern Atlantic Ocean

 


map2.jpgSouth Georgia and Cumberland Bay (based on BAS map of South Georiga)

 

 

The landscapes of South Georiga characterized by steep barren mountainswith Mount Paget being up to 2.934 m high, numerous large glaciers and snowfields. The vegetation is dominated by mosses, lichen, grasses and a several flowering plant species . Ponds and streams are often rich in algae and mosses (http://www.sgisland.gs).

 

IMG_9101.jpgCumberland Bay

 

 

By the way, here are links to two webcams on South Georgia next the Kind Edward Point station:

 

South Georgia Webcam1

 

 

South Georgia Webcam2