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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>
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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;">Thursday, March 11 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: </span><a
href="https://us02web.zoom.us/j/86254328359"
style="text-decoration:none;"><span style="font-size:11pt;font-family:Arial;color:#1155cc;background-color:transparent;font-weight:400;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;">https://us02web.zoom.us/j/86254328359</span></a></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:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Darren Johnson, Associate Professor</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;"> </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;">California State University, Long Beach</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;">How ocean acidification may alter natural selection: A case study of California Grunion.</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;">Climate change and ocean acidification can have strong effects on marine species. However, changes in seawater chemistry are expected to occur over decades, and it is possible that as ocean pH changes, populations will evolve to become more tolerant of lower pH levels. In order to anticipate the long-term effects of ocean acidification, we need to know 1) the particulars of how selection will operate as seawater chemistry changes; 2) the degree to which populations have the genetic capacity to adapt to such changes; and 3) whether evolutionary changes will be quick enough to affect the dynamics of populations over relevant timeframes (e.g., 10-100 years). We studied the evolutionary potential of larvae of a coastal marine fish, the California Grunion (Leuresthes tenuis). In this species, and likely many others, offspring size is closely related to tolerance of OA conditions. To evaluate genetic variation in offspring size, we conducted breeding experiments and measured covariation in offspring size among close relatives. To measure how selection on offspring size may change in response to ocean acidification, we reared larvae in both ambient and high-CO2 conditions and examined relationships between offspring size and survival. Selection on offspring was stabilizing, but changes in seawater chemistry will result in a shift in optimal phenotype and will thus generate selection for larger offspring size. Our breeding experiments suggest a moderate amount of genetic variation in larval size (h2 = 0.23). Projections of evolutionary responses suggest that grunion populations can evolve to become more tolerant of ocean acidification conditions, but they will not completely keep pace with environmental change. It is likely that evolutionary responses will slow, but not stop the long-term decline in population sizes expected under future climate change.</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;">Join Zoom Meeting</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;"><a class="moz-txt-link-freetext" href="https://us02web.zoom.us/j/86254328359">https://us02web.zoom.us/j/86254328359</a></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:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre;white-space:pre-wrap;">Meeting ID: 862 5432 8359</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;">One tap mobile</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;"> +1 253 215 8782 US (Tacoma)</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;">Meeting ID: 862 5432 8359</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;">Find your local number: <a class="moz-txt-link-freetext" href="https://us02web.zoom.us/u/kbywQtaU8J">https://us02web.zoom.us/u/kbywQtaU8J</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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