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Changes in lipid composition of copepods and Euphausia superba associated with diet and environmental conditions in the marginal ice zone, Bellingshausen Sea, Antarctica

first_imgThe effect of varying diet and environmental conditions at the Marginal Ice Zone (MIZ) on the fatty acid and hydrocarbon compositions of five species of copepod and krill, Euphausia superba, was investigated. Zooplankton at the MIZ experienced a range of conditions, from a low algal biomass (mainly flagellates) under pack-ice to a spring bloom dominated by diatoms in the open ocean. Principal Component Analysis classified the copepods into three dietary regimes: (i) omnivores or general algal feeders under the pack ice, (ii) dinoflagellate feeders, and (iii) diatom feeders in the open ocean. This classification was supported by the distribution of the diatom marker n-heneicosahexaene (n-C21:6) and a general indicator of herbivory, the isoprenoid pristane. The fatty acid and hydrocarbon composition reflected dietary preferences and availability as the season progressed. Of the copepods under the pack-ice, Oithona spp. was omnivorous whereas Calanus propinquus was feeding preferentially on flagellates. Metridia gerlachei fed on flagellates in all conditions, but also included diatoms in its diet during the bloom. Calanoides acutus and Rhincalanus gigas, which passed the winter in diapause, were feeding almost exclusively on diatoms in the open ocean. Euphausia superba, which were also mainly diatom feeders in the open ocean, were feeding on the sea-ice algae (diatoms) and suspended material from the water column (dinoflagellates) under the pack-ice.last_img read more


Binghamton athletes ahead of the game for Election Day

first_img“We’ve had just a lot of interest this year and questions from our student athletes about how to get registered and how to get involved,” said Allen. “Got to share with our group all the tricks and tools to getting registered and filling out absentee ballots and really just about the timing of it all,” said Allen. “I will be encouraging my other teammates if they haven’t already voted to do so,” said Afkham. “Making my voice heard and informing other people about making their voice heard is super important to share,” said Morchower. Allen said it was important for her and her staff to give the team a platform to share their voices. “It’s really emphasizing the importance of voting and I truly believe every voice matters and ever vote counts so I really think it’s a great initiative they installed,” said Afkham. She said the team is 100% registered to vote. “My team personally has been having very mature conversations for 20, 21 year olds and our house has been talking a lot about voting,” said junior Sofia Afkham. “Being a student athlete, I have a pretty big platform both in the school and outside of the school,” said junior Sidra Morchower. Morchower and Afkham have already done their part and voted. Now, they are encouraging their teammates to take advantage as well. One team taking advantage is the Binghamton women’s lacrosse team, led by head coach, Stephanie Allen. VESTAL (WBNG) – The NCAA is giving student athletes across the country the day off from practice on Election Day 2020. For most girls on the team, it’s their first time voting in an election. “Encouraging my teammates and friends to get out there and vote,” said Morchower.last_img read more