SMAST Fall 2017 Seminar Series
Each week during the academic school year, the School for Marine Science & Technology hosts free seminars with presentations given by guest speakers. Seminars are open to the public.
Access live seminars
To access the live broadcasting, visit https://echo360.org/home, and login the username email@example.com and password smastumassd. Click "I am not a robot" and then click on ALL CLASSES (MAR 700 - 01 - DEOS Seminar or MAR 700 - 02 - DFO Seminar) and click on the green LIVE streaming.
Access past seminars
You may also view broadcast of past seminars by clicking the department name under the "Seminar Series Archive" heading below, and selecting the title URL for the video you'd like to view (Adobe Flash Player is required. Download the lastest version here).
Department of Estuarine and Ocean Sciences Seminar
The School for Marine Science and Technology Department of Estuarine and Ocean Sciences Seminar Announcement "Insights into Sulfur and Carbon Cycling in Marine Sediments from Dissolved Inorganic Carbon and Total Aklalinity Profiles" Dr. Eyal Wurgaft Postdoctoral Investigator Dept. of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institute Wednesday, January 24, 2018 12:30 pm to 1:30 pm SMAST West, Room 204 706 S. Rodney French Blvd, New Bedford Abstract Sulfate reduction in marine sediments is coupled to the oxidation of either methane (S-AOM) or organic matter (OSR). These two processes are important components of the geochemical cycles of both sulfur and carbon in marine systems, and often promote other processes such as carbonate and pyrite precipitation. However, estimating their in-situ rates from pore water profiles is challenging, mainly because methane profiles are considered unreliable, and because both pathways consume sulfate and release the same products. In this talk, I will show that the rates of OSR and S-AOM can be calculated from DIC and total alkalinity (TA) profiles, and will demonstrate such calculation in the Eastern Mediterranean continental shelf. The calculated sulfate reduction rates show that OSR accounts for 70-90% of sulfate flux into the sediment, in spite of the ultra-oligotrophic conditions in the Eastern Mediterranean. In addition, even though OSR accounts for 80-95 % of the carbonate alkalinity increase in the pore waters, S-AOM is the main process promoting the precipitation of authigenic carbonates, because it buffers the pore water at higher pH than OSR. A comparison of the calculated OSR and S-AOM rates with in-situ and ex-situ rates measured in other locations suggests that the effect of sulfur cycling on DIC and TA extends beyond the well-documented effects of S-AOM and OSR, since the reduced products of these pathways take part in additional reactions, which also affect DIC and TA. Finally, it is noteworthy that the application of TA as a proxy for anaerobic oxidation processes, as demonstrated here, is not restricted to sulfate reduction, and can be used as a tracer for other oxidation processes, such as denitrification and iron/manganese reduction. ********************************************************* Access Live seminars To access the live broadcasting, visit https://echo360.org/home, and login the username firstname.lastname@example.org and password smastumassd. Click "I am not a robot" and then click on ALL CLASSES (MAR 700 - 01 - DEOS Seminar or MAR 700 - 02 - DFO Seminar) and click on the green LIVE streaming. Access Past seminars You may also view broadcast of past seminars by clicking the department name under the "Seminar Series Archive" heading below, and selecting the title URL for the video you'd like to view (Adobe Flash Player is required. Download the latest version here). For additional information, please contact Sue Silva at email@example.com
Department of Fisheries Oceanography / SMAST seminar - January 24, 2018 - Chris McGuire
Department of Fisheries Oceanography How can an ENGO help improve the information used for fisheries management? Chris McGuire Marine Program Director The Nature Conservancy Wednesday, January 24, 2018 3:30 pm - 4:30 pm SMAST-E rm. 101/102 836 South Rodney French Boulevard, New Bedford, MA To access the live broadcasting you will have to login as firstname.lastname@example.org with the password: smastumassd The link to the login is: https://echo360.org/home Don't forget to click on I am not a robot. After login you will have to click on ALL CLASSES (MAR 700 - 01 - DEOS Seminar or MAR 700 - 02 - DFO Seminar) and click on the green LIVE streaming. To view a video of an SMAST seminar (post-October 1, 2014), go to http://www.umassd.edu/smast/newsandevents/seminarseries/ and click on a highlighted title. For more information, please contact email@example.com
Department of Fisheries Oceanography - MS Thesis Defense - Kyle Cassidy
Department of Fisheries Oceanography MS Thesis Defense Decline of American lobster, Homarus americanus, abundance in Buzzards Bay, Massachusetts, USA between 2005-2006 and 2013-2014 by Kyle Cassidy ADVISOR: Dr. Kevin D.E. Stokesbury, Professor, SMAST / Department of Fisheries Oceanography COMMITTEE MEMBERS: Dr. Steven X. Cadrin, Professor, SMAST / Department of Fisheries Oceanography Dr. Rick Wahle, University of Maine February 2, 2018 1:00 p.m. SMAST-East, rm. 101-102 836 South Rodney French Boulevard New Bedford, MA ABSTRACT: American lobster (Homarus americanus) landings in the Gulf of Maine increased over the past decade, but the landings in Southern New England declined. In 2005-2006, 13 sites were examined in Buzzards Bay, and lobsters density was estimated using a ventless trap survey and tagging experiment. This study was repeated; examining the lobster density at the same locations using the same ventless trap and tagging design during the same months of 2013-2014. While Schnabel abundance estimates at each site were not statistically compared; the significant decline in catch per unit effort data indicated a decrease in the lobster population of Buzzards Bay. Decreasing lobster CPUE had a significant negative correlation with increasing water temperatures. Lobsters in southern New England are near their southern range limit and may be living above their thermal threshold. As sea temperature increases we expect lobster distribution to shift towards deeper cooler water. Several tag returns outside the Buzzards Bay area supported this hypothesis. Epizootic shell disease is also an increasing concern for the southern New England stock. The prevalence in Buzzards Bay is higher compared to rates in other stock area, but there was no significant increase in the prevalence from 2005 to 2014. In this study we determined that population levels have decreased suggesting that climate change and warming waters is having a negative effect on the local population. for more information, please contact firstname.lastname@example.org
Seminar Series Archive
DFO seminars are held on Wednesdays at 3:30 pm in Room 157 of SMAST-Fairhaven (AT&T Building). DFO seminars are also simulcast to Room 204, SMAST-New Bedford. Contact Prof. Gavin Fay at email@example.com for information.
Download the archive of seminar series (PDF) (and associated videos where applicable).