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id="docs-internal-guid-aaae1581-7fff-d8f8-c380-f9cfaf60fa81">
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style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Biology Department Virtual Seminar</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Thursday, January 14 at Noon</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Zoom link: <a class="moz-txt-link-freetext" href="https://whoi-edu.zoom.us/j/98783604265?pwd=dS9TclAwekRyMHp1OWdUSU4zaVNQQT09">https://whoi-edu.zoom.us/j/98783604265?pwd=dS9TclAwekRyMHp1OWdUSU4zaVNQQT09</a></span></p>
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style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">MIT-WHOI Joint Program students </span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Cory Berger: “</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Conserved molecular responses to starvation in two Southern Ocean copepods”</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Kayla Gardner: “</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Exploring mesopelagic food webs in the North Atlantic Ocean using carbon and nitrogen stable isotope analysis of amino acids.</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">”</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">
</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Cory Berger: Conserved molecular responses to starvation in two Southern Ocean copepods</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Abstract: Copepods are crustacean zooplankton that collectively form one of the most abundant groups of animals on Earth. In the polar oceans, some copepods store large amounts of lipids, making them a critical food resource for higher trophic levels. In this study, we focus on two dominant Southern Ocean copepods that differ in the chemical makeup of their lipid stores. </span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:italic;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Calanoides acutus</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> is predominantly herbivorous and primarily stores wax esters, while </span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:italic;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Calanus propinquus</span><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;"> is more omnivorous and stores triglycerides. Adult females of both species were subject to a shipboard experiment, where they were either fed or starved for 9 days and characterized with RNA-seq. We use these experimental data in conjunction with a phylogenetic gene family-level approach to compare the transcriptomic starvation responses of these species. At a broad level, starved individuals of both species downregulate genes related to lipid metabolism and transport, including hydrolases and lipases that catalyze steps in lipid degradation. By explicitly considering the homologous relationships between genes, we test whether, and to what extent, the starvation response is mediated by the same orthologs and gene families. We characterize a conserved starvation response involving the upregulation of enzymes involved in RNA and protein metabolism, which may mediate cellular homeostasis in the face of nutrient deprivation.</span></p>
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<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:underline;-webkit-text-decoration-skip:none;text-decoration-skip-ink:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Kayla Grace Gardner: Exploring mesopelagic food webs in the North Atlantic Ocean using carbon and nitrogen stable isotope analysis of amino acids.</span></p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Abstract: Mesopelagic ecosystems in the open ocean support remarkably high biomass and diversity of fishes, crustaceans, cephalopods and gelatinous organisms. Despite this impressive abundance, we remain remarkably ignorant of the ecological roles that mesopelagic animals play in the open ocean. This knowledge gap has stymied efforts to determine the effects of potential extraction of mesopelagic biomass by industrial fisheries on ecosystem services provided by the open ocean. I initiated a study of mesopelagic food webs in the Northwest Atlantic Ocean, focusing on fish, crustaceans and squid, using compound specific stable carbon isotope analysis (carbon CSIA). Specimens were obtained from mid water trawl and MOCNESS tows off the shelf of southern New England in August 2018. Samples were returned to the lab and analyzed using gas chromatography stable isotope ratioing mass spectrometry (GC-irm-MS). We found that individual within a species generally clustered together while there were distinctions among species. Vertical migration patterns, or the absence of these patterns, along with assumed dietary preferences appear to explain broad cluster patterns. This study aims to lay a foundation for determining the structure and function of mesopelagic food webs and identifying the source of carbon fueling mesopelagic communities. Future work will incorporate zooplankton species and the addition of nitrogen CSIA to introduce a trophic component.</span></p>
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style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Passcode: 501332</span></p>
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style="line-height:1.38;margin-top:0pt;margin-bottom:0pt;"><span style="font-size:11pt;font-family:Arial;color:#000000;background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Find your local number: <a class="moz-txt-link-freetext" href="https://whoi-edu.zoom.us/u/aj1eJ52vD">https://whoi-edu.zoom.us/u/aj1eJ52vD</a></span></p>
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<pre class="moz-signature" cols="72">--
Margot McKlveen | she/her
Senior Administrative Assistant
Woods Hole Oceanographic Institution
Redfield Building Room 305 | MS 32
266 Woods Hole Rd.
Woods Hole, MA 02543
508-289-2334
<a class="moz-txt-link-abbreviated" href="mailto:mmcklveen@whoi.edu">mmcklveen@whoi.edu</a></pre>
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