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Reaching the edge of the pack ice in the Ross Sea, Antarctica aboard the icebreaker N.B. Palmer. |
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Breaking ice on the icebreaker Nathaniel B. Palmer. |
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Preparing to go onto the pack ice in the Ross Sea using the cargo net. |
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Deploying the scientific crew to an ice floe for microbiological sampling. |
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Sampling crew reaches an ice floe. |
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Scientists (and Adele friends) collect ice samples from a floe in the northern Ross Sea. |
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Adele penguins work among the scientists on an ice floe in the Ross Sea. |
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Adele penguins inspect the ice and meltwater sampling operation. |
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The pack ice environment and the N.B. Palmer from a rubber inflatable. |
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Working with antarctic samples in the freezer (to maintain Antarctic temperatures) on the N.B. Palmer. |
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‘Green’ samples with high microbial biomass sampled from an ice floe. |
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Extensive microbial growth on the bottom of fast ice (permanent ice connected to the continent) in the Ross Sea, Antarctica. |
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Dense microbial community from an ice floe viewed at low magnification through the dissecting microscope. |
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Phaeocystis antarctica colonies from a plankton tow in the Ross Sea polynya (individual colonies are up to ˜1 mm in diameter). |
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Nudibranch graze diatom mats from the fast ice community in the Ross Sea (viewed at low magnification through the dissecting microscope). |
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Extremely dense microbial community (mostly large, motile dinoflagellates) from an ice floe sample (phase contrast microscopy). |
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High magnification microscopy of microbes (mostly diatoms) from an ice floe meltwater sample. |
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Two large ciliates from a sea ice meltwater sample. |
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A solitary radiolarian (Physematium muelleri) showing opalescent central capsule, halo of tiny green symbiotic algae and nearly transparent extracapsullar network. |
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A solitary radiolarian (Thalassicolla nucleata) with hundreds of symbiotic algae (small golden dots). Large dark structure is the central capsule of the radiolarian. |
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Greater magnification of Thalassicolla nucleata showing symbionts in the extracapsular material. |
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Colonial radiolarian (Collosphaera huxleyi) showing numerous central capsules in gelatinous matrix. (Colonial is >0.5 cm in diameter). |
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A ‘parastic’ amphipod sitting and feeding on a colonial radiolaria. Golden dots are individual central capsules of the radiolarian, each surrounding by numerous golden algae. |
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Feeding brine shrimp to the planktonic foraminfer Hastigerina pelagica (Part 1). |
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Feeding brine shrimp to the planktonic foraminfer Hastigerina pelagica (Part 2). |
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A hypotrichous ciliate grazes bacteria from the biofilm growing on a submerged slide. |
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A very large (>100 µm), flexible ciliate searches for food (bacteria and small protists) among the detrital particles. |
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Natural water sample collected during Lingulodinium poyhedrum bloom at Long Beach harbor. Mixed in are several Ceratium cells and larger tintinnids (ciliates) that are known to feed on L. polyhedrum (darting forth and back). |
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Larger magnification of Lingulodinium polyhedra (dinoflagellate) in high abundances during bloom. |
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Close up of L. polyhedra showing typical swimming behaviour of dinoflagellates. |
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