Events

Department of Estuarine and Ocean Sciences Seminar - Jessica Thomas

The School for Marine Science and Technology Department of Estuarine and Ocean Sciences Seminar Announcement "Micro-siting and Nitrogen Removal Efficiency of a Liquid Injection Permeable Reactive Barrier (PRB)" Jessica Thomas PhD Candidate Department of Estuarine and Ocean Sciences SMAST at UMass Dartmouth Wednesday, September 29, 2021 12:30 pm to 1:30 pm SMAST East Rooms 101/102 And Via Zoom Abstract As development of coastal areas has increased, nutrient loads and particularly nitrogen (NO3-, NO2-, and NH4) have also increased significantly. In addition to the known health impacts that nitrogen (as nitrate) can have on people through drinking water, receiving coastal waters are severely impacted. Southeastern Massachusetts estuaries have been experiencing negative impacts from watershed nitrogen inputs resulting in nitrogen enrichment, eutrophication, and declines in ecosystem health. As a result of the wide-spread occurrence of estuarine nitrogen enrichment, variety of techniques are being explored by towns throughout southeastern Massachusetts to mitigate nitrogen inputs from watersheds to their estuaries. One of the techniques that has seen increased interest due to its moderate cost, ease of installation, and low impact to the environment is the liquid injection PRB. This research investigates the utility of using liquid injection PRBs for restoration of estuarine water quality. For PRB technology to be an effective mitigation method it must be specifically installed to meet local site conditions. Micro-siting techniques were implemented in the installation and design of a the PRB to maximize reduction of nitrogen per unit cost. After the PRB was correctly sited the amount of nitrogen reduction that can be achieved in groundwater from residential areas was established. To better understand the biogeochemistry associated with PRBs and to optimize future PRB installations the extent to which the liquid injectate forming the PRB, emulsified vegetable oil (EVO), travels with groundwater and spreads from point of injection was investigated. Additionally, secondary reactions that occur in reducing conditions were monitored to evaluate their impact to the groundwater and receiving water bodies. ****************************************************************************Join Zoom Meeting https://umassd.zoom.us/j/97440069270?pwd=L2Z1bDZESTFCKzJYZWduYVhWenYvZz09 Meeting ID: 974 4006 9270 Passcode: 428029 One tap mobile +13017158592,,97440069270#,,,,*428029# US (Washington DC) +13126266799,,97440069270#,,,,*428029# US (Chicago) Dial by your location +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 646 876 9923 US (New York) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 669 900 6833 US (San Jose) Meeting ID: 974 4006 9270 Passcode: 428029 Find your local number: https://umassd.zoom.us/u/adtxYu9NMO Join by SIP 97440069270@zoomcrc.com Join by H.323 162.255.37.11 (US West) 162.255.36.11 (US East) 115.114.131.7 (India Mumbai) 115.114.115.7 (India Hyderabad) 213.19.144.110 (Amsterdam Netherlands) 213.244.140.110 (Germany) 103.122.166.55 (Australia Sydney) 103.122.167.55 (Australia Melbourne) 149.137.40.110 (Singapore) 64.211.144.160 (Brazil) 149.137.68.253 (Mexico) 69.174.57.160 (Canada Toronto) 65.39.152.160 (Canada Vancouver) 207.226.132.110 (Japan Tokyo) 149.137.24.110 (Japan Osaka) Meeting ID: 974 4006 9270 Passcode: 428029 **************************************************************************** For additional information, please contact Sue Silva at s1silva@umassd.edu

Department of Fisheries Oceanography Seminar - Dr. David Bethoney

The School for Marine Science and Technology Department of Fisheries Oceanography Seminar Announcement "The Commercial Fisheries Research Foundation: Who we are and what we do" N. David Bethoney, PhD Executive Director Commercial Fisheries Research Foundation Wednesday, September 29, 2021 2:30 pm to 3:30 pm SMAST East, Rooms 101/102 Also Via Zoom Abstract: The Commercial Fisheries Research Foundation was founded in 2004 by a group of fishermen and others in the industry to establish an alternative process for supporting fisheries research that would be led by members of the commercial fishing industry. Initially the Research Foundations work focused on supporting collaborative conservation gear engineering projects in the groundfish fishery. The aim was for fishermen and scientists to work together to develop new gear or modify existing gear to allow fishermen to fish more selectively for species in abundance while protecting those stocks in need of rebuilding. Since that time, the Research Foundations work has expanded to include research pertinent to all fishing sectors and all areas of importance to the commercial fishing industry based in the southern New England region. This presentation will focus on sharing the current work the Research Foundation is conducting. A brief overview of the Research Foundation's history will also be provided. **************************************************************************** Zoom Link https://umassd.zoom.us/j/93758230260?pwd=OHJ5UDloQkZZaCtXcTlBNlR6Qm0rQT09 Meeting ID: 937 5823 0260 Passcode: 426839 One tap mobile +13017158592,,93758230260#,,,,*426839# US (Washington DC) +13126266799,,93758230260#,,,,*426839# US (Chicago) Dial by your location +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 646 876 9923 US (New York) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 669 900 6833 US (San Jose) Find your local number: https://umassd.zoom.us/u/acosTPRs4V **************************************************************************** For additional information, please contact Sue Silva at s1silva@umassd.edu

Department of Estuarine and Ocean Sciences MS Thesis Defense - by Ryan Nuttall

The School for Marine Science and Technology Department of Estuarine and Ocean Sciences MS Thesis Defense "Vibrio cyclitrophicus population - specific biofilm formation and association with marine copepods" By Ryan Nuttal Advisor: Dr. Pia Moisander (University of Massachusetts Dartmouth) Committee: Dr. Erin Bromage (University of Massachusetts Dartmouth) Dr. Mark Silby (University of Massachusetts Dartmouth) Dr. Spencer Nyholm (University of Connecticut) Monday, October 4, 2021 12:00 pm to 1:00 pm UMass Dartmouth Campus, Room TEX-102 285 Old Westport Road, Dartmouth, MA and via Zoom Abstract: Vibrio spp. form a part of the microbiome of the highly abundant marine mesozooplankton termed copepods. The tendency of Vibrio to associate with copepods has been linked to transmission of cholera, and several Vibrio species cause disease through associations with marine macroinvertebrates and finfish which may use copepods as a food source. The biological mechanisms of the Vibrio-copepod association are largely unknown. The aims of this thesis were to: 1) compare biofilm formation of Vibrio isolated from copepods and closely related Vibrio originating from seawater, 2) visualize the attachment of Vibrio on live copepods and dead particles, and 3) investigate growth of Vibrio on live copepods. Two strain types of V. cyclitrophicus were studied that are separated by small genomic differences in biofilm formation loci. Two L-strains were isolated from copepods and two S-strains were included that originated from seawater. It was expected that the L-strains would have a superior biofilm formation capacity, but in biofilm assays developed in this study, L- and S-strains formed similar biofilms in the presence of all sea salts, irrespective of carbon source, suggesting previously undescribed biofilm mechanisms are present in the S-strains. Calcium promoted biofilm formation and resulted in substantially denser biofilms in the L-strains, suggesting regulation of the pilus or polysaccharide pathways present in the L- but not in the S-strains. Calcium regulation may be important for colonization of shellfish by V. cyclitrophicus and other Vibrio spp. Colonization of Vibrio on Acartia tonsa copepods was observed by generating Green Fluorescent Protein -expressing strains and visualizing and quantifying attachment with fluorescence microscopy. Cells tended to localize on the antennae of live copepods, suggesting that vortices generated by animal movement and feeding promote bacterial attachment. L-strains attached to copepods at significantly higher numbers than the S-strains, suggesting that biofilms of L-strains are better at withstanding shear, or that these strains are more effective at evading the hosts immune responses. The data also demonstrate that V. cyclitrophicus cells grow epibiotically on live copepods after attachment, indicating that copepods can both selectively recruit and sustain Vibrio growth. This study provides information about the complex biological mechanisms underlying the Vibrio association with marine zooplankton and particles and elucidates the V. cyclitrophicus metapopulation ecology. The V. cyclitrophicus A. tonsa model used here could be useful in future studies on Vibrio-invertebrate associations. *************************************************************************** Zoom Link: https://umassd.zoom.us/j/92541790588?pwd=WVIyb0tjcm1wM3U0S0ttSEEvdk9BZz09 Meeting ID: 925 4179 0588; Passcode: 201991 **************************************************************************** For addtional information, please contact Sue Silva at s1silva@umassd.edu

Blue & Gold Weekend

Celebrate everything that makes us proud to be UMassD at this weekend festival for alumni, students, families, faculty and staff. Live entertainment, food and fun for all, capped off with UMassD football kicking off Saturday at 2:30 p.m. Don't miss all the fun on the quad between Balsam and Spruce on Friday and Saturday! More info to come on registration and specific events.

Blue & Gold Weekend

Celebrate everything that makes us proud to be UMassD at this weekend festival for alumni students, families, faculty and staff. Live entertainment, food, and fun for all, capped off with UMassD football kicking off Saturday at 2:30 p.m. Don't miss all the fun on the quad between Balsam and Spruce on Friday and Saturday! More info to come on registration and specific events.

Graduate School Fair

Come connect with representatives from a variety of graduate schools to learn about their programs, their admission requirements, and what you can do to become a more competitive candidate when you apply to their programs. This is a great event for ALL students (not just seniors) to attend!

Labor Education Center Award Event

Join this exciting online event to honor our local community and labor heroes who make a difference in promoting social and economic justice in SE Mass. We will especially recognize unsung heroes with jobs that are not always recognized for the role they play in keeping our community safe and running during the time of COVID.